CA1273527A - Programmable marking machine - Google Patents

Programmable marking machine

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Publication number
CA1273527A
CA1273527A CA000488803A CA488803A CA1273527A CA 1273527 A CA1273527 A CA 1273527A CA 000488803 A CA000488803 A CA 000488803A CA 488803 A CA488803 A CA 488803A CA 1273527 A CA1273527 A CA 1273527A
Authority
CA
Canada
Prior art keywords
marking
marking device
plate portion
preselected
pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000488803A
Other languages
French (fr)
Inventor
Edwin W. Speicher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ME Cunningham Co
Original Assignee
ME Cunningham Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ME Cunningham Co filed Critical ME Cunningham Co
Application granted granted Critical
Publication of CA1273527A publication Critical patent/CA1273527A/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B44DECORATIVE ARTS
    • B44BMACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02Dies; Accessories
    • B44B5/026Dies

Abstract

TITLE
PROGRAMMABLE MARKING MACHINE
ABSTRACT OF THE DISCLOSURE
A portable frame is supported for vertical movement on a pair of posts adjacent the surface of a table for receiving an object to be marked. A traveling plate is supported for movement on the frame in the horizontal plane above the surface of the object on the table. A ball screw drive connects the traveling plate to the frame for imparting longitudinal movement of the traveling plate in the horizontal plane. A
marking head assembly is pivotally mounted on the plate and carries a plurality of impact pins which are reciprocated into and out of contact with the object by operation of programmable solenoid valves. An indexing wheel adjusts the angular position of the marking head assembly to control the size of characters formed by the pins impacting the object.
The pins are activated as the traveling table is moved in the horizontal plane to inscribe a desired mark of a preselected character size on the plate. The object is also movable relative to the marking head assembly to facilitate multiple line marking in both forward and reverse directions of travel of the plate.

Description

1~73S~7 This invention relates to apparatus for marking a w~rkpiece and, more particularly, to a method and apparatus for supporting a marking device for selective movement on a frame to position the markiny device to selectively impress identification marks on the surface of the workpiece.

Impact type marking devices are well known in the art of im-pressing identification marks on the surface of stock being conveyed in a production line. ~ne well known application is the use of marking ma-chines that carry marking elements, either alpha or numeric characters, into impact relation with the surface of a workpiece to impress an array of characters on the workpiece as it is being conveyed in a production line. The devices disclosed in United States Patents 3,541,954; 3,636,871 and 4,036,127 are representative of these types of marking machines which are used to impress identification marks on the surface of sbock material, such as billets, slabs, plates, bars, ingots, and the like.

In the past, it has been the practice to utilize a single wheel marker that includes a plurality of marking elements or characters carried on the peripheral surface of the marking wheel. Such an arrangement is disclosed in United States Patent 4,214,520. This type of marking device can be utilized to mark a wide variety of ob~ects that vary in size from rolling stock in a production line to various metals, tags, components and parts.

It is also known to remotely control the operation of a single or multiple wheel marking machine to rotate the marking wheel to place a desired character in position for impressing a mark on the surface of the object. The wheel is mounted in a frame which is capable of moving through various degrees of movement and to be locked in the desired location. Thereafter, an actuator, upon energization, moves the marking " - ~

~;~7;~5~7 wheel to strike the workpiece and impress the selected mark on the surface thereof. The marking wheel is retracted, after which the wheels incremen-tally rotate and move laterally to the next position for marking the workpiece. Thus the actuator is sequentially operated to move the marking wheel along a preselected path to impress the deslred series of characters on the workpiece. The principal disadvantage to this type of marking device is that the choice of characters available for impressing a mark on the surface of the workpiece is limited by the characters carried on the periphery of the marking wheel. Also, depending upon the position of the characters on the marking wheel, delays are encountered in retracting the marking wheel and rotating the marking wheel to position the desired character in marking relation with the workpiece.

Therefore, the conventionally known single and multiple wheel type marking machines are not readily adaptable to rapid marking opera-tions where a wide variety and combination of alphanumeric characters are required to be impressed upon the surface of an object. The need for providing a rapid marking operation is particularly important in a produc-tion line where the marking device must be supported for rapid movement into and out of marking position and the character selection is also rapidly accomplished. Of principal importance is that the marking charac-ters be rapidly changed on the marking device to permit marking a plural-ity of workpieces moving in rapid succession in a production line without interrupting the sequence of operations which take place in a production line due to delays encountered with the marking operation.

More recently, in an effort to increase the speed of the marking operation and to reduce the time required to change the combination of the alphanumeric characters for a message to be inscribed on a workpiece, noncontact markers, such as ink jet or spray printers, as well as dot 1;~73S~

matrix engraving machlnes have been utilized. Ink jet or spray printers are predominantly used to imprint on recording medium, such as paper.
Examples of known ink jet or spray markers are disclosed in United States Patents 3,787,884; 4,272,773; 4,3~6,499; 4,376,284; 4,412,232 and 4,415, 909 .

Programmable dot matrix printers are well known, such as is disclosed in United States Patent 4,412,232. United States Patent 4,415, 909 discloses an ink jet prin~er which includes a print head movably supported along a line of print with the line of symmetry of the printhead being at an angle relative to the direction of motion. This arrangement produces a vertical column of dots perpendicular to the direction of movement. A nozzle array is formed in a pattern to generate equally separated rows of dots on the recording media. A drive element is associated with each nozzle, and a piezoelectric crystal initiates the formation of ink droplets which are ejected from the nozzle. The times for energizing the individual print elements are re tely controlled to minimize the gap between the nozzles in forming dot matrix type print-ing.

British Patent 2,002,694 discloses a programmable dot matrix type of engraver for impressing a selected size of alphanumeric characters on a workpiece. The engraver is computer controlled to provide selective continuous marking of the workpiece to overcome the delays encountered with manual engravers. An engraving tool is supported on an arm which is movable on a carriage by a leadscrew rotated by a stepping motor. me carriage is movably mounted on a horizontal arm that is, in turn, sup-ported by a vertical column above a base on which the workpiece to be marked is stationarily positioned. ~ith this arrangement, the engraving tool is movable along horizontal X and Y axes. The engraving tool in-'735;~7 cludes a punch which is re tely controlled by a central processing unitthrough a solenoid operated air valve to form the desired dot matrix character whereby the size of the figure engraved is determined by the number of stepping motor steps between each point of the 7x5 matrix.
Furthermore, similar to the wire dot matrix printers for computers, there is now also available an engraver with marking pins selectively actuated and arranged in a straight line configuration, which can form alphanumeric characters by collectively traversing a given number of lateral units.

While it has been suggested by the prior art devices to utilize both contact and noncontact type dot matrix marking devices, there is need for an improved dot matrix type marking device that is computer controlled to rapidly mark the workpiece with a preselected alpha or numeric charac-ter and also a message that includes a combination of alphanumeric charac-ters. m e marking operation must be accomplished, particularly in a production line type of operation, without interfering with the other operations performed on the workpiece in the production line. The marking device must be capable of movement along multiple paths in a plurality of axes to enable selective positioning of the mark to be impressed on the surface of the workpiece. There is also need for a dot matrix type marking device for inscribing multiple lines of dot matrix characters on the surface of an object in rapid fashion.

In accordance with the present invention there is provided apparatus for supporting a marking device for movement into position for marking the surface of an object that includes a fixed base for supporting an object to be marked. A support frame is mounted on the fixed base. A
plate is positioned on the support frame for movement in a horizontal plane of travel above the objects supported by the fixed base. Drive ~ ~7;~5;~7 means is drivingly connected to the plate for moving the plate in a preselected direction in a horizontal plane on the supFort frame. Guide means connected to the plate maintains movement of the plate along a preselected direction of travel in a horizontal plane relative to the support frame. A marking device is carried by the plate. Means is provided for connecting the marking device to the plate to generate a mark on the object upon movement of the plate in a horizontal plane.

Further in accordance with the present invention there is provided apparatus for impressing a preselected mark on the surface of an object that includes a marking head having a body portion. The body portion includes a spaced apart arrangement of bores extending there-through. The body portion includes a first surface and a second surface positioned oppositely of the first surface. The bores extend through the first and second surfaces. A marking element is reciprocally positioned in each of the bores. Each of the marking elements includes a shaft portion with an impact end portion movable into and out of the respective bore frcm the body portion first surface to impress a mark on the surface of an object. A marking element has an opposite end portion positioned in the bore adjacent the body portion second surface. A manifold block is positioned in abutting relation with the marking head body portion second surface. Means is provided for releasably connecting the manifold block to the marking head body portion. Actuating means carried by the manifold block and communicating with each of the marking elements sequentially reciprocates the marking elements in the bores in a controlled manner to impact the object and impress a preselected mark on the surface of the object.

Additionally in accordance with the present invention there is provided an impact marking tool that includes a pin member. The pin l'~t~35~7 member has an elongated body portion with a striking end portion and an opposite end portion. A bushing has a bore therethrough for receiving the pin member opposite end portion. Means is provided for positioning the pin member opposite end portion at a preselected location within the bushing bore to locate the pin striking end portion a preselected distance from the bushing. Means is provided for releasably connecting the bushing to the pin member opposite end portion.

Further in accordance with the present invention there is provided a table assembly for movably supporting an object to be marked that includes a stationary base plate. A frame is secured to and extends upwardly from the stationary base plate. The frame includes spaced apart support members having an upper surface positioned in a horizontal plane.
A traveling plate is positioned for movement in said horizontal plane on said support member's upper surface. Guide means on the frame engages the traveling plate to maintain the traveling plate movable along a path of travel in said horizontal plane on said support members upper surface.
Drive means is supported by the frame and is connected to the traveling plate for moving the traveling plate in a preselected direction along said path of travel in said horizontal plane.

Accordingly, the principal object of the present invention is to provide marking apparatus for movably supporting a marking device in a horizontal plane of travel to form a selected array of characters of a preselected size.

Another object of the present invention is to provide a marking head assembly that includes a body portion for recipr w ally retaining a plurality of impact pins operable to extend and retract by the application of air under pressure from the manifold releasably connected to the body portion.

~735~7 An additional object of the present invention is to provide a marking head assembly that is pivotally mounted on a frame whereby the angular orientation of the assembly controls the size of characters formed by the assembly as it is advanced at a preselected rate in a horizontal plane above an object to be marked.

Another object of the present invention is to provide an impact marking tool formed by a plurality of components that permit adjustments to be made in the size of ~he comp~nents and facilitate efficient repair by replacement of damaged components obviating the need to replace the entire marking tool.

These and other objects of the present invention will be more completely disclosed and described in the following specification, the accompanying drawings, and the appended claims.

Figure 1 is view in side elevation of a marking machine, illus-trating a marking head assembly supported on a base of the machine in vertical position for selective movement for impressing identification marks on a wDrkpiece.

Figure 2 is an elevational view taken along line II-II of Figure 1, illustrating the arrangement for moving the marking head assembly in a plurality of directions.

Figure 3 is a view in side elevation of another embodiment of the marking machine, illustrating a marking head assembly horizontally supported for impressing identification marks on a wDrkpiece.

Figure 4 is a view of the marking machine taken along line IV-IV
of Figure 3.

Figure 5, which is on the sheet of drawings with Figures 16 and 17, is a view of the marking machine taken along line V-V of Figure 4.

Figure 6 is another view of the marking machine taken along line ~I-VI of Figure 3.

Figure 7 is a view in side elevation of an indexing wheel for controlling the angular position of the marking head assembly on the machine.

Figure 8 is an end view of the indexing wheel shown in Figure Figure 9 is an elevational view of a representative stop pin mounted on the indexing wheel shown in Figure 7.

- Figure 10 is a view in side elevation of a stop plug that is unted on the marking head assembly for engagement by a stop pin of the indexing wheel to position the marking head in the desired angle of orientation to control the height of the dot matrix characters imprinted on the workpiece.

Figure 11 is a chart identifying the relationship between the size of the dot matrix characters and the dimensions of the stop pin.

Figure 12 is a top plan view of a manifold and a plurality of air operated solenoid valves mounted on the marking head assembly for controlling operation of the marking pins.

Figure 13 is an enlarged view in side elevation and partially in section of the marking head assembly, illustrating a plurality of marking pins that are selectively extended and retracted from the assembly to form a selected dot matrix character on the surface of the workpiece.

~ 735~7 Figure 14 is a view of the marking head assembly taken along XIV-XIV of Figure 13.

Figure 15 is a schematic illustration, partially in section, of the marking head assembly taken along lines XV-XV of Figure 13, illus-trating the fluid connection between a marking pin and associated solenoid valve for extending and retracting the pin into and out of engagement with the surface of the w3rkpiece to impress a dot on the workpiece.

Figure 16 is an enlarged view, partially in section, of one embodiment of a marking pin for the marking head assembly.

Figure 17 is a view similar to Figure 16, illustrating another embodiment of a marking pin.

Figure 18 is a top plan view of a table assembly for movably supporting a workpiece relative to the marking machine of the present invention for multiple line marking.

Figure 19 is a fragmentary view, partially in section, of the table assembly taken along line XIX-XIX of Figure 18.

Figure 20 is a further view, partially in section, of the table assembly, taken along line XX-XX of Eigure 18.

Referring to the drawings and particularly to Figures 1-6 there is illustrated marking apparatus generally designated by the numeral 10 in Figures 1 and 2, and marking apparatus generally designated by the numeral 12 in Figures 3-6 for supporting a marking device 14 for movement into and out of position for marking the surface of a ~rkpiece and for moving the marking device 14 during the marking operation. Both marking apparatus 10 and 12 are adaptable for impressing by the marking device 14 a preselected 3~7 ~rray of characters including but not limited to alphanumeric characters on many types of ~orkpieces that include production line items, such as slabs, rolled stock and the like, as well as plates, round and various tags, components and parts fabricated of material which may be comprised of glass, metal or plastic.

As seen in Figures 1 and 2, the marking apparatus 10 is mounted for vertical movement on a support system generally designated by the numeral 16 that includes a pair of spaced apart, vertically extending posts 18 and 20 which are supported by pedestals 22 and 24 below a hori-zontal supporting structure, such as a conveyor, table, or platform 26.
m e platform 26 has an upper surface 28 for supporting the workpiece which can either be retained in a fixed position on the platform 26 or moved on the platform 26, as will be explained later in greater detail. With this arrangement, the marking device 14 is positioned vertically above the platform 26, and the wDrkpiece is positioned on the platform surface 28.

The marking apparatus 12 illustrated in Figure 3 corresponds substantially to the marking apparatus 10 shown in Figures 1 and 2 in which the apparatus 12 is supported in a manner to position the marking device 14 in a horizontal plane. Accordingly, like numerals used to identify the elements of the marking apparatus 10 ln Figures 1 and 2 will be used to designate like elements for the marking apparatus 12 shown in Figures 3-6. As shown in Figure 3, the marking apparatus 12 is mounted on a support system, generally designated by the numeral 30 that includes an angle mounting bracket 32 having a vertically positioned base plate 34 suitably connected, as by bolting, to the side of table 36 (shown in phantom) in Figure 3. The table 36 includes a horizontal surface 38 for supporting the workpiece as it is being marked.

1~73~7 Now referring in greater detail to the marking apparatus 10 shown in Figures 1 and 2, the support system 16 includes a plurality of bearing supports, such as pillow block bearings 40. Each post 18 and 20 has a pair of pillow block bearings 40 secured thereon in spaced vertical arrangement. Figure 1 illustrates the pair of pillow block bearings 40 on the post 18. A corresponding pair of pillow block bearings 40 are also provided on the post 20; however it should be understood that the pillow block bearings have been omitted from the p~st 20 in Figure 2 for clarity of illustration of the other elements.

Each pillow block bearing 40 includes a flange portion 42 that is secured by bolts 44 to a bracket 46 that abuts against a base plate 48.
A face plate 50 is positioned horizontally relative to the vertical base plate 48 and is also secured by bolts 44 to the bracket 46 on the lower pair of pillow block bearings 40. me face plate 50, which is shown in greater detail in Figure 4, includes a longitudinally extending opening 52 through which the marking elements of the marking device 14 are extensible and retractable to impress an identification mark on the surface of the w~rkpiece positioned on the platform surface 28.

The marking elements within the marking device 14 can include in one embodiment, as shown in detail in Figures 15-17, pin members that are reciprocally carried by the marking device 14 and are remotely controlled, such as by a computer, to extend and retract in a selected manner to inscribe a preselected array of programmed characters on the surface of the workpiece.

Associated with the opening 52 in the face plate 50 is an optional pair of guide plates 56 which are bolted to the face plate 50.
The guide plate 56 can also be used with the embodiment of the apparatus 12 shown in Figures 3 and 4 where the plates 56 are shown spaced apart to 3S;~7 provide a slot 58 through which the marking elements extend. HDwever, it should be unders~ood that the guide plates 56 are not utilized when the characters to be marked are of a size that require the marking device 14 to be tilted to a preselected angle, which will be explained later in greater detail.

As shown in Figure 1, the marking device 14 is mounted on a carriage assembly 60 which is positioned for reciprocal movement in a horizontal plane above the platform 26. me carriage assembly 60 includes a traveling plate 62 for supporting the marking device 14. A motor 64, shown in Figure 2, is connected by a ball screw drive mechanism generally designated by the numeral 66 to the plate 62 for rectilinearly moving the plate 62 in a horizontal plane above the surface 28 of the platform 26.
me ball screw drive mechanism 66 will be described later in greater detail.

The plate 62 and~therefore the carriage 60 are supported for horizontal, reciprocal movement by the provision of a guide mechanism generally designated by the numeral 68 in Figure 1. 1he guide mechanism 68 includes a spacer 70 that is fixedly secured, such as by bolting, to the upper surface of spacer 70 that i5 fixedly secured, such as by bolt-ing, to the upper surface of the plate 62. A sliding bed 72 is positioned on and bolted to the spacer 70. The sliding bed 72 includes a groove for receiving a guide shaft 74 which is mounted on horizontal plate 76 which is, in turn, connected to the side plate 48 of the support system 16 which is vertically movable as above discussed on the posts 18 and 20.

A second sliding bed 75 is connected to a bracket 77 also mounted on the plate 62. me sliding bed 75 includes a groove for re-ceiving a guide snaft 78 that is connected to the vertical side plate 48.
With this arrangement the plate 62 is stabilized by movement of the 1;~'735;~7 sliding beds 72 and 75 on the fixed guide shafts 74 and 78, respectively.

Movement of the carriage assembly 60 on the guide mechanism 68 is accomplished by actuation of the motor 64. The motor 64 can be oper-ated by various means, such as electrically or pneumatically, and is supported on a bracket 80 which is bolted to the horizontal plate 76 of the support system 16~ as seen in Figures 1 and 2. The motor 64 is drivingly connected to a coupling 82 which is drivingly connected through a shaft seal 84 to one end of a ball screw 86. The opposite end of the ball screw 86 is rotatably supported by a second shaft seal 88. Both shaft seals 86 and 88 are connected to the plate 76.

A ball screw guide 90 is connected to the traveling plate 62 by a bracket 92. The ball screw guide 90 drivingly engages the ball screw 86. Upon rotation of the ball screw 86 by actuation of the motor 641 the ball screw guide 90 r~ves longitudinally on the ball screw 86 between the shaft seals 84 and 88. Consequently, as the ball screw guide 90 moves, the carriage assembly 60 and specifically the traveling plate 62 moves in a horizontal plane parallel to the ball screw 86. In this manner, the marking device 14 moves in a horizontal plane parallel to platform surface 28.

The marking device 14 illustrated in F~gure 1 is movable in a horizontal plane above the platform 26, as well as vertically to a desired position on the posts 18 and 20. Vertical movement of the marking device 14 may be accomplished manually by the use of conventional clamps to secure the pillow block bearings 40 in the desired position on the posts 18 and 20, or by a pDwered jack generally designated by the numeral 94 in Figures 1 and 2. The powered jack 94 includes a suitable motor 96 which can be either air or electrically operated, and is supported by a unting bracket 98 to a pair of clamp blocks 100 (only one of which is 7;~5~'~

shown) in Figure 1. Clamp blocks 100 are rigidly secured in a fixed position on the upper end of the posts 18 and 20. m us with this arrange-ment the motor 96 is maintained in a fixed position for operation.

The tor 96 is drivingly connected as shown in Figure 2 to a coupling 102 which is, in turn, connected to an inverted-type ball screw drive, generally designated by the numeral 104 that is supported by a ball bearing block 106 to an angle bracket 108 mounted on the unting bracket 98. The ball screw drive 104 includes a ball screw 110 that is drivingly connected to a shaft 112 mounted in a housing 114 which is secured to the tor 96. The shaft 112 includes a lower end portion 116 which is secured by a pair of spacer plates 118 to a jack mounting angle 120. m e jack unting angle is, in turn, suitably connected, such as bolts, not shown, to a pair of spaced apart plates 122 that extend outwardly from the base plate 48. With this arrangement, upon rotation of the ball screw 110 by actuation of the motor 96, the shaft 112 moves longitudinally at a right angle with respect to the ball screw 110. In this manner the shaft 112 is extended and retracted from housing 144 relative to the mounting bracket 98 fixed on the posts 18 and 20.

Rotation of the ball screw 110 in a preselected direction extends the shaft 112 from the housing 114 to lower the carriage assembly 60 with the marking device thereon toward the surface 28 of the platform 26. Accordingly, rotation of the ball screw 110 in the opposite direction retracts the shaft 112 into the housing 114 which, in turn, raises the carriage assembly 60 and the marking device 14 to a selected height above the platform 26.

With regard to the embodiment of the marking apparatus 12 illustrated in Figures 3, 4 and 5, the substantially same elements dis-cussed above with regard to the marking apparatus 10 illustrated in ~735~7 Figures 1 and 2 are utilized with the marking apparatus 12. The marking apparatus 12, as above discussed, is mounted on the table 36 in position where the marking device 14 lies in a horizontal plane above the table surface 38. Accordingly, to modify the above described marking apparatus 10 for use in the orientation of the apparatus 12 illustrated in Figure 3, the base plate 48 is removed from its connection to the pillow block bearings 40 and is bolted to a horizontally positioned plate 124 of the support system 30. The marking apparatus 12 also includes the carri-age assembly 60 and plate 62 supported by the guide shafts 74 and 78 for movement of the marking device 14 in a horizontal plane. The marking apparatus also uses a ball screw drive, as above described. As seen in detail in Figure 4, the marking device 14 is positioned oppositely of the opening 52 in the face plate 50 to provide a wide range of horizontal movement of the marking device 14 within the longitudinal dimension of the face plate opening 52.

Further in accordance with the present invention, both marking apparatus 10 and 12 are provided with a pivoting mechanism, generally designated by the numeral 126 and shown in detail in Figure 6, and with selected components of the tilting mechanism shown in Figures 7-10. The pivoting mechanism 126 is operable to adjust and maintain the marking device 14 in a preselected angular position with respect to base plate 48.
With this arrangement, the marking device 14 is pivoted or tilted to a preselected angle which determines the height of the characters formed on the workpiece by the marking device 14.

As will be explained later in greater detail and illustrated in Figures 13-17, the marking device 14 includes a marking head body portion 128 that includes a plurality of marking elements in the form of impact pins, generally designated by the numeral 130, which will be discussed 1;~73~i~7 later in greater detail. The impact pins 130 are reciprocally movable in the marking head b3dy portion 128. The plurality of impact pins 130, for e~ample nine, are positioned in the head body portion 128 and spaced in longitudinal alignment. Each pin 130 is associated with one of a plural-ity of air operated solenoid valves 132 as shown in Figure 12. The solenoid valves 132 are operable to extend and retract the impact pins 130 to indent the surface of a workpiece with dots to form a single-line dot matrix array of characters, figures, or patterns. Actuation of the solenoid valves 132 to form the desired mark is programmable and control-led from a central processing unit (not shown).

The solenoid valves 132 are unted on a manifold block 134 which is connected, as illustrated in Figure 15, to one end of the marking head body portion 128. As illustrated in Figures 1-3 and 6, the manifold block 134 is pivotally connected to the plate 62 in a manner that permits the entire marking device 14 to be pivoted, for example about a vertical axis for the marking apparatus 10 illustrated in Figure 2 or about a horizontal axis for the marking device illustrated in Figures 3 and 6.

The pivotal mounting of the marking device 14 is accomplished by securing the upper end portion of the manifold block 134 to a pivot pin 136 having a lower end portion which is threaded into a threaded bore of the manifold block 134. The pivot pin 136 is mounted within a pair of thrust bearings 138 which are posit~oned on opposite sides of the plate 62. A sleeve 140 shown in Figures 1 and 3 extends through aligned bores of the thrust bearings 138. The pivot pin 136, in turn, extends through the sleeve 140 into threaded engagement with the manifold block 134. With this arrangement, the pin 136 is pivotal within the bearings 138, and pivotal movement of the pin 136 is transmitted to the manifold block 134 to move the block 134 with the pin 136.

7~5,_7 The manifold block 134, together with the marking head body 128, are pivotable to a preselected angle by operation of a piston cylinder assembly generally designated by the numeral 142 in Figures 4 and 6. The piston cylinder assembly 142 includes a cylinder portion 144 mounted by a bracket 146 to the bottom surface of the movable plate 62. A cylinder rod 148 is extensible relative to the cylinder 144 and includes a rod end portion 150. me rod end portion 150 has extending through it a bore 154, as shown in Figure 6.

As further illustrated in Figure 6, the manifold block 134 includes opposite end portions 156 and 158. The rod end portion 150 is suitably connected to the manifold block end portion 156. In one manner of connection, the block end portion 156 is provided with a slotted opening (not shown) for receiving the plate 152. Suitable means, such as a pin, is rotatably supported in the block end portion 156 and extends through the bore 154. With this arrangement, upon actuation of the piston cylinder assembly 142 to extend or retract the cylinder rod 148, the manifold block 134 pivots about the pivot pin 136.

The manifold block 134 is pivoted to a preselected angular position on tbe plate 62 about the pivot pin 136 upon actuation of the piston cylinder assembly 142. A stop mechanism yenerally designated by the numeral 160 in Figures 1, 3 and 6 holds the selected pivot position of the block 134. me stop mechanism 160 includes a stop plug 162 shown in detail in Figure 10. The stop plug 162 includes a threaded shaft 164 which is threaded into a bore in the end portion 158 of the manifold b.lock 134.

Positioned oppositely of the manifold block end portion 158 is an indexing wheel 166 illustrated in Figure 6 and in further detail in Figures 7 and 8. The wheel 166 is rotatably mounted on angle bracket 170 1~73S~7 that is bolted to the lower surface of the plate 62. me indexing wheel 166 is drivingly connected to the shaft of an indexing tor 172. The indexing wheel 166 as shown in Figure 8 includes a hub portion 174 having a bore 176 for receiviny the shaft of the indexing motor 172. A set screw is adapted to extend tnrough a bore 178 of the hub portion 174 into engagement with the motor shaft to nonrotatably connect the shaft of the motor to the wheel hub portion 174. In this manner, actuation of the motor 172 rotates the indexing wheel 166.

As illustrated ln Figure 7, the wheel 166 includes a circular array of bores 180 that extend through the wheel 166. The bores 180 are spaced a preselected distance apart and are adapted to receive an end portion 182 of a stop pin generally designated by the numeral 184 in Figures 1, 3 and 9. Each stop pin 184 is secured in a bore 80 by means such as the engagement of a set screw (not shown) extending through the threaded bore 186. A representative nu~ber of the bores 186 is shown in Eigure 7, and it should be understcod that each bore 180 communicates with a means of securing each stop pin 184, such as with the set screw bore 186.

Each pin 184 has an opposite end portion 188 which is formed at a preselected angle "b", as illustrated in Figure 9. Also, Figure 9 illustrates that the pins 184 are different in length, "a" corresponding to a desired character size formed by the impact pins 130. With this arrangement, as illustrated in Figure 6, the piston cylinder assembly 142 is actuated to retract the cylinder rod 148 to pivot the manifold block 134 about the pivot pin 136. me indexing wheel 166 rotates freely when the stop plug 162 is removed from abutting relation with the stop pin 184.

The indexing wheel 166 is then rotated by the indexing motor 172 to position the desired stop pin 184 opposite the stop plug 162 on the 5~7 manifold block end portion 158. When the desired pin 184 is in position oppositely of the stop plug 162, the piston cylinder assembly 142 is again actuated to extend the cylinder rod 148. This pivots the manifold block 134 about the pivot pin 136. The manifold block, together with the marking head body 128, pivots until the stop plug 162 abuts the end of the stop pin 184, as shown in Figure 6.

Further in accordance with the present invention, it is the angled position of the manifold block 134 and the marking head body 128 which determine the size of the dot matrix characters formed by contact of the impact pins 130 with the surface of the workpiece. m us the height of the characters is determined by the pivoted angle "b" of the manifold block 134 about the pivot pin 136. Accordingly, the pivoted position of the manifold block 134 is determined by the relative extension of the cylinder rod 148. me length of extension of the cylinder rod 148 is, in turn, determined by the point at which the manifold block 134 pivots until further pivotal movement is obstructed by contact of a stop pin 184 of the indexing wheel 166 with the stop plug 162.

By providing a plurality of stop pins 184 having a range of lengths, the pivoted angle of the manifold block 134 for a preselected character size is precisely controlled. The character size is therefore directly related to the length "a" shown in Figure 9 of each stop pin 184. Further in accordance with the present invention, the length of each stop pin 184 positioned in a bore 180 of the indexing wheel 166 is dif-ferent.

A representative example of the relationship between character size as determined by the length of the stop pin 184 is shown in the chart of Figure 11. For example, for a dot matrix character having a height of 1/2 inch, the length "a" of the pin 184 is 1 1/8 inches. Accordingly, by 1;~735;~7 way of further example, a character size of 3/8 inch requires a stop pin of 1 1/4 inches, and so on as enumerated in Figure 11.

Ib assure positive stop of the pivotal vement of the manifold blw k 134 by contact of the pin end portion 188 with the stop plug 162, the end portion 188 is angled at a preselected degree "b". Accordingly the magnitude of the angle "b" varies with the length of the pin 184. The chart in Figure 11 also identifies the magnitude of the angle "b" for each respective length "a" of the pin 184. In accordance with the present invention, dimensions "a" and "b" are selective and are also determined by the pivotal location of the manifold block 134 on the plate 62.

Further in accordance with the present invention, the indexing tor 172 can be remotely controlled. It is also programmable to rotate the indexing wheel 166 to the desired location for positioning a pin 184 of the required length for a selected dot matrix character size.

Now referring to Figures 12-17, there is illustrated in greater detail the elements of the marking device 14 which, a~ discussed above, include the marking head body 128 with the impact pins 130 and the manifold block 134 with the solenoid valves 132 for controlling movement of the pins 130. Referring to Figure 12, there is illustrated the intern-al structure of the marking head body 128 including a plurality of impact pins 130, for example nine impact pins, positioned in bores 190 equally spaced apart in the marking head body 128.

Each of the b~res 190 extends completely through the body 128 from an air inlet end portion 192 to a pin outlet end portion 194. As illustrated in Figure 13, the length of the manifold block 134 corresponds to the length of the head body portion 128. Adjacent the air inlet end portion 192 of the head body 128 are provided bores 196 that extend 35~7 transversely through the head body portion 128 in a manner not passing through the bores 190 for the pins 130.

The manifold block 134 includes a recessed portion 198 at one end portion thereof for receiving the air inlet end portion 192 of the head body 128. A pair of bores 200 extends through the manifold block 134 in alignment with the bores 196 of the head body 128. Accordingly, a pair of ~uick release pins (not shown) extends through two pairs of aligned bores 196 and 200 to connect the head body 128 to the manifold block 134.
The connecting pins have been omitted in Figures 14 and 15 for clarity of illustration of the bores 196 and 200, and it should be understood that types of connections are to be utilized to permit efficient connection of the marking head body 128 to the manifold 134.

Each of the impact pins 130 as shown in Figure 13 are recipro-cally movable within the bores 190, and the manner in which the pins 130 are positioned is schematically illustrated in Figure 15. me marking head body 128, as illustrated in Figures 12-lS, includes an air passageway 202 which extends entirely through the head body 128 in a manner such that a portion of passageway 202 passes through the bores 190. The passageway end portions 204 and 206 are drilled and tapped to receive a pipe tap 207 as shown in Figure 14 for receiving a connection to a source of air under pressure.

As illustrated in Figures 12, 13 and 15, a pin guide or bushing 208 is positioned in each bore 190 below the passageway 202. The bushing 208 serves to maintain the end of the pin 130 movable in a straight line path into and out of contact with the schematically illustrated workpiece 210. Furthermore, a portion of the air passageway 202 passes through the upper end portions of each pin guide 208. The bushing 208 is retained in the bores 190, for example as illustrated in Figures 13, 14 and 15, by a ~;~735;~7 face plate 212 which is bolted to the bottom of the marking head body 128. Other methods may also be utilized.

Gne embodiment of pin 130 is illustrated in Figure 16 which includes a bushing 214. The bushing 214 has three different sized bores.
The first bore 215 is drilled and tapped to accommodate a pipe plug or set screw 216. The second bore 217 is below bore 215 and is of such diameter to accommodate the enlarged headed end portion 220 of pin shaft portion 213. m e third bore 221 is below bore 217 and is the same diameter of the pin shaft body portion. By bore 221 being of a smaller diameter than bore 217, a ledge portion 222 is formed in bushing 214. Pin 130 is assembled by dropping the pin shaft portion 219 through bore 221 until the face 223 of the enlarged head portion 220 of the pin shaft 219 abuts ledge portion 222. m e spacer 218 is then inserted to fill bore 221. With the spacer 218 in place, the set screw 216 is then threadedly advanced into the upper threaded portion of bore 215 to maintain the relative parts of pin 130 in an assembled fixed relation.

Another embodiment of the pin 130 is illustrated in Figure 17 which includes a bushing 224 having a length shorter than the bushing 214 shown in Figure 16. The bushing 224 is also positioned on a headed end 226 of pin 130 and a set screw 228 is advanced into threaded engagement with the bushing 224 until the set screw 228 abuts the headed end 226.
With this arrangement, the above described spacer 218, shown in Figure 16, is omitted, thereby reducing the overall length of the pin 130.

m e length of the impact pin can be adjusted, that is used with or without a spacer in the pin bushing. Further adjustments can be made in the diameter and weight of the pin 130 which, in turn, controls the size of the dot forming the dot matrix character by increasing or decreas-ing the size and downward thrust of the pin 130.

~;~735~7 The marking head body 128 is not limited to a pin of a prese-lected diameter or a preselected length and various pin sizes can be utilized, depending upon the dimensions of the dot matrix character to be formed. This may be accomplished by inserting into the pin outlet end portion 194 of the marking head body 128 the appropriate bushing 208 which has a fixed outside diameter 225 equal to that of bore 190 and an inside diameter 227 equal to the desired diameter of pin shaft portion 219 of pin 130. ~epending on the desired size of the dot forming the dot matrix character, the pin size and thrust may need to be varied.

The pin thrust may be increased by increasing the downward force on pin 130. Moreover, it may also be increased by the utilization of a larger pin 130. If the latter is desired, the bushing 214 of pin 130 is elongated, as illustrated in Figure 16. In order to keep the top end portion of set screw 216 even with the top end portion of bushing 214, a spacer 218 of the appropriate length is inserted into bore 217 so as to firmly abut the head portion 220 of pin shaft 219 and the base portion of set screw 216 when the set screw 216 is threadedly advanced into the upper threaded portion of bushing bore 215.

As schematically illustrated in Figure 15, the pin 130 is extendable from and retractable into the bore 190 of the marking head body 128. Downward movement of the pin 130 is initiated by the flow of air under pressure through a passageway 230 in the manifold 134. The passage-way 230 communicates with the bore 190 at the up~er end of the pin 130.
Flow of air against the set screw 216 of the pin 130 moves the pin down-wardly through the head body 128 into contact with the workpiece 210 to thereby indent the surface of the workpiece 210 with a dot forming part of the desired dot matrix character. An air inlet passageway 230 communi-cates with each bore 190 in the marking head body 128.

1;~735~7 The opposite end of the air passage 230 communicates with a solenoid valve 132 that is mounted to the manifold block 134. According-ly, each air passage 230 oonnects one of the respective pin bores 190 with a solenoid valve 132. Therefore, as illustrated in Figure 12, for a marking head body 12~ having a nine pin arrangement, nine solenoid valves 132 are utilized. me valves 132 are spaced from one another on opposite sides of the manifold block 134 as shown in Figures 12, 14 and 15.

me manifold block 134 includes a passageway 232 that extends the full length of the block 134. me passageway 232 also includes open end portions 234 which are adapted to receive a piFe tap (not shown) similar to the above described pipe tap 207. With this arrangement, the passageway 232 is connected to a source of air under pressure. The passageway 232 extending through the manifold block 134 communicates with a plurality of passageways 236 for connecting each solenoid valve 132 to the air passageway 232. A pair of connecting passageways 236 are illus-trated for the corresponding pair of solenoid valves 132 in Figure 15.

Thus with the above described arrangement, air under pressure is directed into the manifold block 134 through one of the end portions 234 of the passageway 232, and the air flows along the passageway 232 through the connecting passageways 236 to the solenoid valve 132. The solenoid valves 132 are operable to control the flow of air through the corresponding passageway 236 and into the bore 190 of the respective pin 130. Thus, the solenoids 132 function as energizing means for the respec-tive pins 130.

Upon actuation of a solenoid valve 132, air is introduced into the passageway 236 and directed against the end of the pin 130 to force the impact end portion of the pin 130 beyond the face plate 212 into impact relation with the workpiece 210. me pins are normally maintained ii~73~

in a retxacted position within the bore 20 by a constant flow of air under pressure through the passageway 202, which is in communication with all of the bores 190. me flow of air through the passageway 202 into the bores 90 acts against the lower end of the bushing 214 to force the bushing upwardly into contact with the manifold block 134 in the recess 198.

me pressure of the air flowing through the passage 2n2 is less than the pressure of the air directed from the respective solenoids 132 against the upper end of the pin 130. Upon actuation of a solenoid 132, the pin 130 will overcome the resistance provided by the air through the passageway 202 and extend into impact relation with the workpiece 210. In the event the lower end of the bushing 214 comes in contact with the upper end of the bushing 208 upon extension of the pin 130, air from the pas-sageway 202 is still capable of extending the bore 190 to act against the pin 130 to retract the pin 130 when the respective solenoid 132 is deener-gized. ~eenergizing a solenoid 132 cuts off the flow of air through the passageway 230. me flow of air through the passageway 202 then acts against the bushing 214 to retract the pin 130 into the marking head body 128. 'Thus, by controlling the operation of the solenoids 132, the impact pins 130 are extended and retracted in a controlled manner to indent the surface of the workpiece 210 with dots to form a single line, dot matrix array of characters.

The apparatus for selecting the dot matrix array of characters to be formed by the pins 130 impacting the surface of the workpiece is located at an operator's terminal, which is connected to a computer operated controller. From the controller, the characters to be inscribed on the w~rkpiece are selected and the selection is made from a data entry 1~'73S~7 terminal which is located remote from the location of the marking appara-tus. The controller generates data and character signals which are transmitted to solenoid valves 132.

The sequence operation of the solenoid valves 132 to extend and retract the impact pins 130 is controlled by a speed sensor device, such as an encoder 238 associated with the ball screw 86, as illustrated in Figures 2 and 4. m e encoder 238 is responsive to the rate of rotation of the ball screw 86 which is adjustable by operation of the motor 64. me encoder 238 monitors or senses the rate of rotation of the ball screw 86 and generates responsive signals, known as tach pulses. The tach pulses are directly proportional to the rate of rotation of the ball screw 86 and are transmitted as feedback signals to the controller. me controller processes the feedback signals to sequence the operation of the solenoid valves 132 for a preselected rate of impact of the pins 130 with the workpiéce. Accordingly, the rate of impact is adjustable.

The feedback signals generated by the encoder 238 upon rotation of the ball screw 86 are transmitted in a desired format to a controller.
me feedback signals are processed for transmitting corresponding signals for sequencing the opening and closing of the solenoid valves 132 to maintain a desired width of the characters. ~ith the above described arrangement, the encoder 238 sequences actuation of the solenoid valves 132 for imprinting a single line of characters on the surface of the object to be marked.

Further in accordance with the present invention, the marking apparatus 10 illustrated in Figure 1 is adaptable for multiple line marking of an object by utilizing a movable table assembly generally designated by the numeral 240 in Figures 18-20. The table assembly 240, in order to perform multiple line marking of a workpiece, is positioned on 1~7;~5~7 the platform 26, shown in Figure 1, beneath the marking device 14. The object to be marked is positioned on the table assembly 240. The table assembly 240 oscillates the object .in a controlled manner beneath the marking device 14 to permit multiple line marking. As illustrated in Figures 18-20, the movable table assembly 240 includes a base plate 242 which is adapted to be bolted in a fixed position to the surface 28 of the platform 26, illustrated in Figure 1. As seen in Yigure 18, a plural-ity of holes 244 are provided for receiving bolts for engagement with the platform 26. In this manner, the base plate 242 of the assembly 240 is rigidly secured on the platform 26.

A frame generally designated by the numeral 246 is attached to the base plate 242 for supporting a movable upper plate 248. m e frame 246 is formed by a pair of longitudinally spaced angle brackets 250 and 252, as illustrated in Figure 20. me angle brackets 250 and 252 have a length corresponding substantially to the length of the upper plate 248.
me angle brackets are transversely connected to one another by side plates 254 secured to the ends of the angle brackets 250 and 252.

As seen in Figures 18 and 20, a plurality of rollers 256 are connected by bolts 258 to the angle brackets 250 and 252 in underlying, supporting relation with the upper plate 248. Tb also facilitate slidable movement of the upper plate 248 on the frame 246, the upper end portions of the brackets 250 and 252 are provided with longitudinally extending channels 260, as illustrated in Figure 19. The upper plate 248 includes downwardly depending side plates 262 having lower end portions 263 which are received and are movable in the channels 260. With this arrangement, the upper plate 248 is securely positioned for reciprocal vement on the frame 246 which is secured to the base plate 242 which is, in turn, affixed to platform 26.

i~7;~5~

Longitudinal movement of the upper plate 248 on the upper edges of the angle brackets 250 and 252 is initiated by a motor 264 which can be either electrically or pneumatically operated. The motor 264 includes an output shaft 266 drivingly connected by a coupling 268 to drive shaft portion 270 of a ball screw 272. The drive shaft portion 270 is rotatably supported by a bearing bracket 274 which is mounted on the base plate 242.
The ball screw 272 extends through a shaft seal 276. A ball screw guide 278 is drivingly oonnected to the ball screw 272. The ball screw guide 278 is, in turn, connected by an angle bracket 280 to the lower surface of the upper movable pla~e 248. The opposite end of the ball screw 272 is rotatably supported by a bearing bracket 282 similar to the bearing bracket 274. The bracket 282 is mounted on the base plate 242. me opposite end of the ball screw 272 is connected by a coupling 284 to the drive shaft 286 of an encoder 288.

With this arrangement, actuation of the motor 264 to rotate the drive shaft 266 ~n a preselected direction, rotates the ball screw 272 in a corresponding direction. As the ball screw 272 rotates, the ball screw guide 278 moves longitudinally on the ball screw 272 to move the upper plate 248 connected by the bracket 280 to the guide 278 in a corresponding direction. As seen in Figure 20, the upper plate 248 is movable in a horizontal plane. Accordingly, changing the direction of rotation of the ball screw 272 changes the direction of movement of the plate 248 on the upper surfaces of the angle brackets 250 and 252.

The encoder 288 illustrated in Figures 18 and 19 operates in a manner similar to the encoder 238, as above described. The encoder 288 nitors the rate of rotation of the ball screw 272 for reciprocating the movable plate 248. As discussed above, the object t~ be marked is secured in a fixed position to the surface of the plate 248. Thereafter, the ~35~7 table 248 is moved to a desired position to locate the workpiece in underlying relation with the marking device 14 for initiating the marking of a line of characters at a preselected location on the workpiece. The line of characters to be marked is entered into the memory of the computer which controls the operation of the apparatus 10 so that during the marking of the workpiece, the plate 248 is stationary.

Upon completion of a line of marking, the operation of the solenoid valves 132 and ball screw 86 is terminated. Upon this occur-rence, rotation of the ball screw 272 in a preselected direction is initiated by action of the motor 264. Accordingly, the ball screw 272 is rotated through a preselected number of revolutions to advance the plate a preselected distance for the desired spacing be~ween the next successive line of characters to be marked from the previously marked line. The encoder 288 monitors the rotation of the ball screw 272 and transmits tach pulses that form the feedback signals to the controller.

me tach pulses are proportional to the range of movement of the table 148 from an initial starting point so that once the plate 148 has moved a sufficient distance to obtain the desired spacing between the line of characters, the feedback signals to the controller are processed.
When the table is advanced the programmed distance, as indicated by the feedback signals from the encoder 288, rotation of the ball screw 272 by operation of the motor 264 is interrupted. Thereafter, the controller activates the motor 64 and the solenoid valves 132 for a preselected rate of impact of the pins 130 with the surface of the object on the plate 248 for ins~ribing the next line of characters spaced a set distance from the previously marked line of characters.

It should be understood that the marking device 14 is operable for marking in a forward, as well as a reverse direction of movement, so ~;~7~5~7 that marking of the workpiece is not limited to marking in one direction.
In this manner, bidirectional marking of an object is accomplished to substantially increase the speed of marking, particularly for multiple line marking. Accordingly, the characters from one line to the next may vary in height, as determined by operation of the pivoting mechanism 126 and indexing wheel 166 above described. The successive operation of advancing the table 248 a given distance, commencing operation of the solenoid valves 132 and motor 64, and terminating the operation of the valves 132 and motor 64 to again advance the table a set distance can be repeated for multiple line marking of the workpiece on the movable plate 248.

According to the provisions of the patent statutes, I have explained the principle, preferred construction and mode of operation of my invention and have illustrated and described what I now consider to represent its best embodiments. However, it should be understood that, within the scope of the appended claims, the invention may be practiced otherwise than an specifically illustrated and described.

Claims (9)

The embodiments of the invention in which an exclusive property or privilege is claimed are described as follows:
1. Apparatus for marking an object comprising, a fixed member having a horizontal surface for supporting an object to be marked, a generally U-shaped support member for supporting a marking device, said support member having an intermediate plate portion, a base plate portion, and a support plate portion, said base plate portion and said support plate portion extending from said intermediate plate portion in generally parallel spaced relation to each other, said marking device having a longitudinal axis, guide means secured to said support member between said base plate portion and said support plate portion, said guide means supporting said marking device for linear movement relative to said support member and having a longitudinal axis, drive means for moving said marking device linearly relative to said fixed member to apply a mark on an object positioned on said fixed member horizontal surface, means for fixedly mounting said U-shaped support member adjacent to said fixed member with said base plate in a position either parallel to or perpend-icular to said fixed member horizontal surface so that said marking device is arranged to mark either a vertical surface or a horizontal surface of said object, and indexing means to pivot said marking device relative to said guide means to provide a preselected angle between said guide means longitudinal axis and said marking device longitudinal axis and thereby provide characters of a preselected size inscribed by said marking device on said object.
2. Apparatus for marking an object as set forth in claim 1 which includes an elongated opening in said base plate with a portion of said marking device extending therethrough.
3. Apparatus for marking an object as set forth in claim 1 in which said guide means includes, a first guide member secured to said support plate and a second guide member secured to said intermediate plate, said guide means arranged to guide said marking device linearly relative to said support member.
4. Apparatus for marking an object as set forth in claim 1 which includes, an indexing drive means connected to and movable with said guide means, a rotatable indexing wheel having indexing pins extending there-from, means pivotally mounting said marking device on said guide means, and stop means secured to a portion of said marking device, means to rotate said indexing wheel and position a preselected indexing pin in abutting relation with said stop means on said marking device to thereby maintain said marking device in preselected angular relation with said object to be marked.
5. Apparatus for marking an object as set forth in claim 1 which includes, means pivotally mounting said marking device on said guide means, an indexing wheel rotatably mounted on said guide means, a plu-rality of pins mounted in a circle and having end portions extending from said indexing wheel, stop means adjacent one end of said marking device, means to rotate said indexing wheel and position a preselected pin end portion in overlying relation with said stop means on said marking device, and actuator means to pivot said marking device stop means into abutting relation with said pin end portions, and in overlying relation therewith to thereby maintain said marking device in a preselected angular relation with said object to be marked and thereby control the height of the character marked on said object.
6. Apparatus for marking an object as set forth in claim 5 in which, said actuator means operable to pivot said marking device stop means into and out of abutting relation with said pin end portions to permit said pins to move above said stop means.
7. Apparatus for marking an object as set forth in claim 5 in which, said plurality of pin members extending from said indexing wheel includes pins having a preselected length to control the angle of said marking device to said object to be marked and thereby control the height of the character marked on said object.
8. Apparatus for marking an object as set forth in claim 7 in which, said plurality of pin members have preselected angular planar end portions to maintain planar contact with a planar portion of said stop means.
9. Apparatus for marking an object comprising, a fixed member having a horizontal surface for supporting an object to be marked, a pair of posts connected to said fixed member and extending vertically there-from, a generally U-shaped support member for supporting a marking device, said support member having an intermediate plate portion, a base plate portion, and a support plate portion, said base plate portion and said support plate portion extending from said intermediate plate portion in generally parallel spaced relation to each other, said marking device having a longitudinal axis, said U-shaped member slidably secured to said posts with said base plate portion extending substantially parallel to said fixed member horizontal surface and in overlying relation there-with, said U-shaped support member arranged to move vertically relative to said fixed member to position said base plate at a preselected position above said fixed member horizontal surface, guide means secured to said support member between said base plate portion and said support plate portion, said guide means supporting said marking device for linear movement relative to said support member, said guide means having a longitudinal axis, drive means for moving said marking device linearly relative to said fixed member to apply a mark on an object positioned on said fixed member horizontal surface, said base plate portion having an elongated opening with a portion of said marking device extending there-through, and indexing means to pivot said marking device in a horizontal plane relative to said guide means to provide a preselected angle between said guide means longitudinal axis and said marking device longitudinal axis and thereby provide characters of a preselected size inscribed by said marking device on said object.
CA000488803A 1984-08-17 1985-08-15 Programmable marking machine Expired CA1273527A (en)

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US06/642,129 US4591279A (en) 1984-08-17 1984-08-17 Marking machine for forming variable sized characters
US642,129 1984-08-17

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Also Published As

Publication number Publication date
JPS61233579A (en) 1986-10-17
US4815868A (en) 1989-03-28
US4652156A (en) 1987-03-24
US4591279A (en) 1986-05-27
US4741637A (en) 1988-05-03
US4930912A (en) 1990-06-05

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