Browse Prior Art Database

Original Publication Date: 1981-Aug-31
Included in the Prior Art Database: 2004-Apr-02

Publishing Venue

Xerox Disclosure Journal


A diagnostic technique for evaluating the feeding of the document across the platen of a copier with a full frame flash illumination system. The illumination lamps are flashed at a more rapid interval than normal, at reduced intensity, so that two or three flashes are made as the document is being fed onto the platen toward the registration position. This produces a copy on a test copy sheet which will directly illustrate thereon the position and skewing of the document at known times as it is being fed. Preferably, this would be a programmable feature of the machine which the technical representative could actuate with a diagnostic code input. As an example, a first flash can be provided as the lead edge of the document should enter onto the platen, a second flash can be provided as the same lead edge should have reached a position just prior to registration, and a third flash can be provided as the document should be feeding off of the platen. The timing of the flash interval to achieve flash at these positions would be pro-grammed into the diagnostic routine software of the programmable controller of the copier.