Browse Prior Art Database

SPRING TYPE PAPER FEEDER Disclosure Number: IPCOM000025599D
Original Publication Date: 1986-Aug-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal


The figure illustrates the operating principals of a sheet feeder using a rotatable helical spring to separate sheets emerging from the feeder A stack of sheets 10 is supported on a support platform 12 which maintains the stack at the sheet feeding level and in contact with a rotatable sheet separator feed wheel 14 by means of an elevator mechanism (not shown). At the exit end of the sheet stack is a helical spring 16 rotatably mounted on a shaft 18 which is driven by motor 20. In operation the separator feed wheel is actuated, the top sheet in a stack of sheets is driven forward into the space between adjacent windings of the spring, separating the top sheet from the next sheet in the stack. The rotation of the helical spring enables the lead edge of the sheet to work its way upwardly to the top of the spring separating the sheet from the stack at which time the separator feed wheel drives the sheet off the top of the s ring. In this manner the spring operates as a worm screw forcing out one