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All-Points-Addressable Printing Improvement

IP.com Disclosure Number: IPCOM000059605D
Original Publication Date: 1986-Jan-01
Included in the Prior Art Database: 2005-Mar-08

Publishing Venue

IBM

Related People

Authors:
Baker, GN Hedrick, GB Morgan, JE [+details]

Abstract

A technique is described whereby the quality of print characters of matrix printers is enhanced through the use of an extra print wire so as to provide an overprint condition between printed lines. This concept is particularly applicable in all-points-addressable (APA) printing by eliminating white streaks which occur between adjacent printed lines. When printing APA images on a matrix printer, paper spacing tolerances often result in a gap occurring between the printed lines, which when observed appears as a white streak running across the printed images. Streak variations as small as .005" significantly detract from the quality of the printed images. The technique described herein uses a ninth print wire to provide an overlap, thereby eliminating the line gap appearing as a white streak on the paper.