Browse Prior Art Database

LEADING EDGE DESKEW AND REGISTRATION DEVICE

IP.com Disclosure Number: IPCOM000025403D
Original Publication Date: 1985-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 80K

Publishing Venue

Xerox Disclosure Journal

Abstract

Recirculating document handlers used in electrophotographic copiers are known in the art. Originals can skew while in or being feed from such a handler and commonly require some sort of deskewing (see US. Patent No. 4,428,667 and its cited art). In such handlers it is, also, often necessary to know precisely where the leading edge of a document is before it enters the platen area.

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XEROX DISCLOSURE JOURNAL

LEADING EDGE DESKEW AND REGISTRATION DEVICE
Nitin M. Sevak

Proposed Classification US. CI. 271/244
Int. CI. B65h 9/04

I

6

c

2

FIG. 2 II

3

FIG. 3

Volume 10 Number 2 March/April 1985 69

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LEADING EDGE DESKEW AND REGISTRATION DEVICE (Cont'd)

Recirculating document handlers used in electrophotographic copiers are known in the art. Originals can skew while in or being feed from such a handler and commonly require some sort of deskewing (see US. Patent No. 4,428,667 and its cited art). In such handlers it is, also, often necessary to know precisely where the leading edge of a document is before it enters the platen area.

The present disclosure relates to a device which provides both the above functions. Figure 1 shows paper guide plates 1 and 2. Document 3 moves along path 2 toward path 3 by a means such as a conveyor system or pinch rollers. The means that moves document 3 stops at a wait station as the leading edge enters the area between paths I and 2. As document 3 enters the area between paths 1 and 2, leading edge registration device 4 is in the raised position such that guides 5 and 6 project up into the area between paper paths 1 and 2. Leading edge registration device 4 then moves a fixed amount opposite the direction of document 3 travel as shown in Figure 3. This action deskews document 3 and positions it to registration position 8 as shown in Figure 3. After the deske...