An embossing system is disclosed for embossing cards with characters of at least two pitches. A number of embossers equal to the number of lines of characters to be embossed on the card are positioned in line. Each embosser is dedicated to the embossing of a particular line of characters with a particular...http://www.google.com.tw/patents/US4686898?utm_source=gb-gplus-share專利 US4686898 - Credit card embossing system
