Browse Prior Art Database

Sensing Sheet Movement

IP.com Disclosure Number: IPCOM000051897D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11

Publishing Venue

IBM

Related People

Authors:
Yanker, GM [+details]

Abstract

In reverse shingling techniques for separating sheets prior to feeding in the opposite direction, it is customary to detect the position of the trailing edge in order to know when to change the drive direction. This presents some difficulty when it is desired to feed interspersed sheets having different lengths. That is, the means for detecting the trailing edge must be readjusted, and sheets of the same length must be fed at the same time. Illustrated and described here is a means for detecting movement of the leading edge of the sheet which overcomes the disadvantages mentioned above.