The InnovationQ application will be updated on Sunday, May 31st from 10am-noon ET. You may experience brief service interruptions during that time.
Browse Prior Art Database


IP.com Disclosure Number: IPCOM000024710D
Original Publication Date: 1981-Oct-31
Included in the Prior Art Database: 2004-Apr-02

Publishing Venue

Xerox Disclosure Journal


The document handler jam detector uses two transmissive optical sensors to detect document position. They detect proper document registration at the input station and are used for jam detection. Three jam checks are performed as a document is cycled onto the platen. A document handling system (DHS) jam occurs if (1) the document takes too much time clearing the input station; (2) the document overshoots the platen registration edge; or (3) the document is pulled out of the input station prior to the feed on cycle.