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Request for a Specific Pitch Wheel for a Wheel Printer Used With a Personal Computer

IP.com Disclosure Number: IPCOM000040453D
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02

Publishing Venue

IBM

Related People

Authors:
Clark, RE Parrott, RD Schuller, WM Van Dyke, MS [+details]

Abstract

When the pitch of a wheel printer used with a Personal Computer (PC) is to be changed, the PC transmits a command signal, which indicates the desired pitch, to the printer. If the wheel printer is in the desired pitch, it continues printing. If the wheel printer does not have the desired pitch wheel so as to need a different wheel, the command signal causes the printer to go offline and indicate a wheel error so that an operator can change to a wheel having the desired pitch. When using a wheel printer of the PC, a three-byte escape sequence signal is used to change printing to a different pitch. The third byte uses a different numeral to indicate each pitch.