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Hammer Rattling in a Line Printer

IP.com Disclosure Number: IPCOM000060590D
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08

Publishing Venue

IBM

Related People

Authors:
Davis, GW Fitzgibbons, PJ Pelkie, RE [+details]

Abstract

The print hammers of a high speed line printer operate with modified flight times when inactive for a period of time as small as one or two print line cycles, thereby affecting the quality of print. A method is provided to rattle the print hammers not selected to print at the end of each print line cycle. Hammer rattling is the process of firing print hammers with reduced current sufficient to cause the hammers to physically move from the rest position but without causing the hammers to strike the print medium. Basically, the process is based on determining those print positions in the course of printing a line of data in which no printing will take place.