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AIR ADJUSTMENT - AUTOMATIC

IP.com Disclosure Number: IPCOM000024420D
Original Publication Date: 1980-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 1 page(s) / 49K

Publishing Venue

Xerox Disclosure Journal

Abstract

In feeding individual sheets of paper from a sheet stack for printing or copying, it is desirable to feed the sheets from the bottom of the stack to avoid the necessity of stack elevators and allow replenishment of the stack while the feeder is operating.

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XEROX DISCLOSURE JOURNAL

AIR ADJUSTMENT - AUTOMATIC Proposed Stephen Wen the Classification

U.S. C1. 271/165 Int. C1. B65h 1/06

In feeding individual sheets of paper from a sheet stack for printing or copying, it is desirable to feed the sheets from the bottom of the stack to avoid the necessity of stack elevators and allow replenishment of the stack while the feeder is operating.

To aid in the removal of sheets from the bottom of a stack, it is common to provide air floatation to reduce the stack force on the sheet being removed.

To automatically adjust the quantity of air provided for air floatation in proportion to the weight of the stack, a spring-loaded, sheet-weight sensing switch 2 is provided to control a bleed valve 4 in the air line between a blower 6 and the air floatation chamber 8 of a bottom sheet feeder assembly 10.

With small or light-weight sheet stacks, the bleed valve will open to reduce air flow to chamber 8 and prevent excessive lifting or blowaway of the sheets in the stack.

Volume 5 Number 4 July/August 1980 383

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