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OPERATION OF A DOCUMENT HANDLER WITHOUT THE USE OF PAPER SHEET SENSORS

IP.com Disclosure Number: IPCOM000026175D
Original Publication Date: 1990-Oct-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 89K

Publishing Venue

Xerox Disclosure Journal

Abstract

Generally, document handlers found on copying or scanning systems include document sheet sensors located at various positions throughout the path of travel of the document sheet. In certain situations, for example when troubleshooting a defective document handling system, it is desirable to bypass one or more of these sensors while exercising the remaining components of the document handling system in a normal fashion. Accordingly, this feature would be particularly useful in isolating a defective sensor within the document handler.

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XEROX DISCLOSURE JOURNAL

OPERATION OF A DOCUMENT HANDLER WITHOUT THE USE OF PAPER SHEET SENSORS

Gerald L. Coy Kenneth J. Buck

Proposed Classification
U.S. C1.271/003 Int. C1. B65h 5/22

Generally, document handlers found on copying or scanning systems include document sheet sensors located at various positions throughout the path of travel of the document sheet. In certain situations, for example when troubleshooting a defective document handling system, it is desirable to bypass one or more of these sensors while exercising the remaining components of the document handling system in a normal fashion. Accordingly, this feature would be particularly useful in isolating a defective sensor within the document handler.

Operation of the document handler without one or more of the document sensors would require an alternate means of sequencing the document through the various feed positions of the feed cycle. In accordance with the present invention, the sequencing is based on a predetermined set of nominal timing values associated with the movement of the document throughout the various feed positions. As previously described by Michael S. Doery in Adaptive Algorithm for RDHs (ABC Equation), (Xerox Disclosure Journal, Vol. 9, No. 6, NovJDec 19841, it is possible to determine the actual time required for a sheet to move to or from a particular sensor. Moreover, it would be possible to determine the nominal times required for movement of the document sheet between the fe...