A method and apparatus for simultaneously cleansing and grading yarn produced by a spinning or spooling machine with a plurality of spindles or primary spools. One spindle processor is associated with each spindle. The spindle-processor grades in a grading plane containing a cleansing envelope. All yarn...http://www.google.com.tw/patents/US5537811?utm_source=gb-gplus-share專利 US5537811 - Method for categorizing yarn defects and cleansing yarn
