Browse Prior Art Database

CHARACTER EDGE SMOOTHING FOR MATRIX PRINTING

IP.com Disclosure Number: IPCOM000024573D
Original Publication Date: 1981-Feb-28
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 47K

Publishing Venue

Xerox Disclosure Journal

Abstract

A matrix printer producing a resolution of about 250 spots per inch both vertically and horizontally provides adequate print quality for most purposes. However, under close examination, characters show "steppedff edges of the almost vertical lines (see Figure 1). To improve the quality of such characters, it has been found that offsetting the location of the spot K pixel by mechanical or electronic means can smooth these edges producing higher quality characters (see Figure 2). For efficiency, it may be desirable to allow offset of only every second or third row.

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KEROX DISCLOSURE JOURNAL

CHARACTER EDGE SMOOTHING FOR MATRIX PRINTING
Donald L. Ort

Proposed Classification
U.S. C1. 346/140 Int. CI. Gold 15/16

FIG. I FIG. 2

A matrix printer producing a resolution of about 250 spots per inch both vertically and horizontally provides adequate print quality for most purposes. However, under close examination, characters show "steppedff edges of the almost vertical lines (see Figure 1). To improve the quality of such characters, it has been found that offsetting the location of the spot K pixel by mechanical or electronic means can smooth these edges producing higher quality characters (see Figure 2). For efficiency, it may be desirable to allow offset of only every second or third row.

Volume 6 Number 1 January/February 1981 19

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    XEROX DISCLOSURE JOURNAL Volume 6 Number 1 January/February 1981

[This page contains 1 picture or other non-text object]