Browse Prior Art Database

Copier Alignment

IP.com Disclosure Number: IPCOM000051507D
Original Publication Date: 1981-Feb-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Herring, GS: AUTHOR [+2]

Abstract

An operator aligns a copier's bezel and checks the copier's magnification. A processor supplies adjustment instructions from sensors mounted in a test drum subjected to images from a special test document.

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Copier Alignment

An operator aligns a copier's bezel and checks the copier's magnification. A processor supplies adjustment instructions from sensors mounted in a test drum subjected to images from a special test document.

In Fig. 1, horizontal bars, with vertical test segments, carried by a master document appear as a footprint in an image area on a stationary test drum as moving optics scan the document. Photosensitive sensors optimally spaced on the drum supply sensor intercept error signals to a processor which displays position indicia instructing an operator which adjustments to make. Correct bezel position causes each bar's image to fall on a corresponding sensor. Incorrect positions cause imbalances between the sensor signals, the display then instructing the operator to make X adjustments. The processor calculates Y adjustments by timing vertical bars occur and Z (magnification) adjustments by comparing the two sensor signals.

A flow diagram (Fig. 2) outlines processor operation.

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