Browse Prior Art Database

INCHWORM PLATEN TRANSPORT

IP.com Disclosure Number: IPCOM000024508D
Original Publication Date: 1980-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 100K

Publishing Venue

Xerox Disclosure Journal

Abstract

In xerographic copier/duplicators having automated feeding of the original document onto the platen, several methods for document transport are known. These include a white belt which either drags the document across the platen glass or sucks it against the moving vacuum belt. In such systems, the belt is worn as it is handled by drive rolls, it becomes soiled by contact with the back of documents and then transfers the soil onto the face of others. The belt also changes its frictional properties with use and is expensive to replace. Belts adapted for vacuum transports sometimes contain holes which are visible through thin documents and show prominently around the edges of small documents. The method of this disclosure will eliminate these shortcomings.

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INCHWORM PLATEN TRANSPORT Proposed Thomas Acquaviva Classification

U.S. C1. 271/8R Int. CI. B65h 7/00

Volume 5 Number 6 November/December 1980 535

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INCHWORM PLATEN TRANSPORT (Cont'd)

In xerographic copier/duplicators having automated feeding of the original document onto the platen, several methods for document transport are known. These include a white belt which either drags the document across the platen glass or sucks it against the moving vacuum belt. In such systems, the belt is worn as it is handled by drive rolls, it becomes soiled by contact with the back of documents and then transfers the soil onto the face of others. The belt also changes its frictional properties with use and is expensive to replace. Belts adapted for vacuum transports sometimes contain holes which are visible through thin documents and show prominently around the edges of small documents. The method of this disclosure will eliminate these shortcomings.

Figure 1 shows successive stages in the operation of the disclosed device. Platen 1 is provided with entrance and exit pitch roll pairs 2 and 3, respectively, platen cover 4, whose lower surface 5 comprises a flexible, opaque white membrane, an asymmetrical drive roller 6 and a holding arm 7. Registration edge 8 and registration arm 9 provide positive location of the document during the exposure step.

At A, the document enters the platen area propelled by rollers 2. Th...