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MULTIFEED DETECTION SYSTEM FOR DOCUMENT AND PAPER HANDLING

IP.com Disclosure Number: IPCOM000027211D
Original Publication Date: 1995-Oct-31
Included in the Prior Art Database: 2004-Apr-07

Publishing Venue

Xerox Disclosure Journal

Abstract

Recirculating document handlers identify multiple sheet fees by comparing the document count between the successive passes required for pre-collation machine configurations. Electronic reprographic machines, having scan and store capability, require only a single set in order to produce an unlimited number of print sets. The failure to detect a multiple sheet feed with such machine can result in loss of job integrity in that many sets would be printed with a missing page. Since multi-feeds are commonly coincidental, especially in vacuum corrugation feeds, it would be desirable to provide a detection system in which sheets are separated downstream of a feeder to enable detection as an overlength sheet by a pre-existing arrangement of sensors and jam detection logic.