SHEET ON PLATEN SENSOR FOR DETERMINING MODE PRIORITIES
Original Publication Date: 1987-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
A system to sense the presence of a document sheet on the platen (forgotten during a manual document copying operation), to prevent automatic document feed until the document is removed. A light reflection optical sensor located in the document handler platen cover over the platen is preferred. The sensor indicates that a document sheet is on the platen. This signal is used for several purposes, e.g., to detect a sheet manually placed or left on the platen by the operator, and then to prioritize a manual copying mode in a multimode document handling system even if RDH or SADH copying modes have been selected. It prevents damaging a delicate document.