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Pitch Change During Overstrike

IP.com Disclosure Number: IPCOM000042333D
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-03

Publishing Venue

IBM

Related People

Authors:
Czyszczewski, JS Daniels, PR Mendez, JC Nguyen, HH [+details]

Abstract

This article describes a technique which improves alignment of overstrike characters and base characters where a pitch change has occurred in high speed printers in word or data processing systems. Printers with text formatters support a continuous overstrike function. Normally, text to be overstruck is marked by a begin and end control. When the line is being printed and the end overstrike control is processed, the printer backs up and overstrikes from the begin point to the end point. A problem arises when there is a pitch change in the text field that is overstruck since the overstriking is normally done in the pitch that is in effect when the ending control is processed.