Browse Prior Art Database

INK JET PRINTER STITCHING IMPROVEMENT

IP.com Disclosure Number: IPCOM000023933D
Original Publication Date: 1979-Apr-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 320K

Publishing Venue

Xerox Disclosure Journal

Abstract

Excellent ink jet print quality can be obtained by printing an entire line in one pass using, e.g., a 40-jetin-4inearray to achieve a density of 240 drops/inch on a 1/6 inch high line. However, this array is expensive and difficult to fabricate. Similar quality can be achieved with a reduced number of jets and multiple passes. For example, use 20 jets spaced apart at 1/120 inch, printing two passes per line and incrementing the jet on the paper 1/240 inch between passes. If the jet spacing 1/120 inch is defined as A , the paper incrementsX /2 between stitching passes.

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XEROX DISCLOSURE JOURNAL

INK 3ET PRINTER STITCHING IMPROVEMENT Proposed~C.Koc1er Classification

U.S. CL 346/140

mt. CL GOld 15/16

JETS

~t PASS

  JETS 2~dPASS

e e e0 0

e e

0

0

8

0

e

8

8

8

0

0 RESULT~NG

PR~NTDENSITY

o JET NOT PULSED

0 JET PULSED BUT DOES NOT OPERATE

~ JET PULSED, OPERATES CORRECTLY

Excellent ink jet print quality can be obtained by printing an entire line in one pass using, e.g., a 40-~jetin~4inearray to achieve a density of 240 drops/inch on a 1/6 inch high line. However, this array is expensive and difficult to fabricate. Similar quality can be achieved with a reduced number of jets and multiple passes. For example, use 20 jets spaced apart at 1/120 inch, printing two passes per line and incrementing the jet on the paper 1/240 inch between passes. If the jet spacing 1/120 inch is defined as A , the paper incrementsX /2 between stitching passes.

The proposed system relates to perceived quality and system reliability. The dot size can be made large enough to achieve some pattern overlap. It is assumed that one jet can fail at an array density of 240/inch and the resulting white streak (non~ printed area) will be small enough that this will not be considered a failure by the operator, However, in the previous stitching scheme the width of the white streak would double; and a failure would be perceived by the operator resulting in a possible service call.

Volume 4 Number 2 March/April 1979 249

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