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DIRECT PLATEN DOCUMENT HANDLER

IP.com Disclosure Number: IPCOM000025039D
Original Publication Date: 1983-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 66K

Publishing Venue

Xerox Disclosure Journal

Abstract

A recirculating document feeder in which the document stack I is laid face down directly on top of the copier platen 2. Each bottom sheet of the stack 1 is individually removed automatically after copying by horizontally translating the platen 2 out from under the stack a short distance (e.g., 1/4 inch) in the opposite direction from the registration edge 3, with a solenoid or other drive system to expose and allow capture of one edge of the bottom sheet with a removal feeder 4 (comprising a vacuum roller 5 and/or a frictional feeder) assisted by an air knife separator 5. The rest of the bottom sheet is then pulled out by the feeder 4 and recirculated back to the top of the stack with a sheet return transport 7 in a simplex 8 or duplex 9 path, while the platen 2 slides back to its copying position with the stack alignment edge guide 10 aligned over the registration line 3. This edge guide 10 restricts the stack from moving with the platen. It may also be oscillated for stack tamping to improve restacking registration.

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KEROX DISCLOSURE JOURNAL

DIRECT PLATEN DOCUMENT HANDLER Proposed Stephen C. Urciuoli Classification

U.S. Cl. 271/99 Int. C1. B65h 3/08

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A recirculating document feeder in which the document stack I is laid face down directly on top of the copier platen 2. Each bottom sheet of the stack 1 is individually removed automatically after copying by horizontally translating the platen 2 out from under the stack a short distance (e.g., 1/4 inch) in the opposite direction from the registration edge 3, with a solenoid or other drive system to expose and allow capture of one edge of the bottom sheet with a removal feeder 4 (comprising a vacuum roller 5 and/or a frictional feeder) assisted by an air knife separator 5. The rest of the bottom sheet is then pulled out by the feeder 4 and recirculated back to the top of the stack with a sheet return transport 7 in a simplex 8 or duplex 9 path, while the platen 2 slides back to its copying position with the stack alignment edge guide 10 aligned over the registration line 3. This edge guide 10 restricts the stack from moving with the platen. It may also be oscillated for stack tamping to improve restacking registration.

This system eliminates the need for the separate document tray and over-platen document transport of a conventional recirculating document handler.

The following U.S. Patents are noted by way of background: 3,589,713; 3,944,366; 3,907,277 and 3,941,473.

Volume 8 Number 3 May/June 1983 203

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