Browse Prior Art Database

Optimum Developer Gate Setting in Copier

IP.com Disclosure Number: IPCOM000052812D
Original Publication Date: 1981-Jul-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Baca, JP: AUTHOR

Abstract

A tester analyzes copies made on a copier at different developer-gate settings and indicates the optimum setting by identifying where separate knees of the resulting image density curve merge for uniform toner flow across the developer.

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Optimum Developer Gate Setting in Copier

A tester analyzes copies made on a copier at different developer-gate settings and indicates the optimum setting by identifying where separate knees of the resulting image density curve merge for uniform toner flow across the developer.

Successive copies 1-9, supplied by a tested copier (not shown), carry images resulting from different developer-gate settings. The tester's optics 10 images each sheet, in turn, onto three groups A-C of photodiodes 11-25 in an array 26. An analog-to-digital converter 27 supplies three groups of digital representations A-C to a processor 28 of the light value on each of the photodiodes for each of the copies.

The processor 28 calculates and plots (29) three curves A-C, relating the light density to the developer-gate opening across the developer gate. The point 30 at which the three knees merge on the plot specifies the optimum gate opening.

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