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: IPCOM000027206D
Original Publication Date: 1995-Oct-31
Included in the Prior Art Database: 2004-Apr-07

Publishing Venue

Xerox Disclosure Journal


A multifeed may occur with a vacuum corrugation feeder (VCF) when attempting to feed a document with prepunched holes along the lead edge (i.e., standard 3-hole punch) followed by a document that has no holes or holes in a different location. For example, during a duplex job or a simplex job with intermixed documents, some documents can be oriented in the VCF feed tray with the bound edge at the rear, and some with the bound edge in the front near an air knife. If there are prepunched holes at the leading edge, vacuum can be transmitted through them from holes in the VCF belt, to the documents without holes, causing a multifeed. A solution to this problem is to equip the VCF with a feed belt having a lead edge hole pattern that does not align with holes in a large percentage of prepunched world wide papers. A manual clutch adjustment scheme could be provided to enable movement of the VCF feed belt hole pattern with respect to prepunched paper. This would allow a fine adjustment for non-standard or difficult paper hole patterns.