Browse Prior Art Database

DOCUMENT CENTERING APPARATUS

IP.com Disclosure Number: IPCOM000026554D
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 4 page(s) / 157K

Publishing Venue

Xerox Disclosure Journal

Abstract

In most conventional optics imaging processes, a document is registered on a platen against one side or a corner of registration guides. It requires a lens to move in both axial and transverse directions for reduction and enlargement modes. However, the transverse movement of the lens can be eliminated if a document can be automatically placed at the "center" of the glass platen. With the document centering apparatus of Figures 1-3, all documents of various sizes can be placed at the center of the glass platen or any predetermined area automatically.

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Page 1 of 4

XEROX DISCLOSURE JOURNAL

DOCUMENT CENTERING APPARATUS
Youti Kuo
David
J. Lemon

Proposed Classification
U.S. C1.271/229 Int. C1. B65h 9/14

16

B FIG. I

17-

XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 September/October 1992 297

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Page 2 of 4

DOCUMENT CENTERING APPARATUS(C0nt'd)

13 I

16

"\ '" P

J

7

1

298 XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 September/October 1992

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[This page contains 1 picture or other non-text object]

Page 3 of 4

DOCUMENT CENTERING APPARATUS(Cont'd)

16

B

FIG. 3

XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 SeptembedOctober 1992 299

[This page contains 1 picture or other non-text object]

Page 4 of 4

DOCUMENT CENTERING APPARATUS(C0nt'd)

In most conventional optics imaging processes, a document is registered on a platen against one side or a corner of registration guides. It requires a lens to move in both axial and transverse directions for reduction and enlargement modes. However, the transverse movement of the lens can be eliminated if a document can be automatically placed at the "center" of the glass platen. With the document centering apparatus of Figures 1-3, all documents of various sizes can be placed at the center of the glass platen or any predetermined area automatically.

The apparatus of Figures 1 - 3 is directed generally to a means of moving papers in two perpendicular directions in separate steps through the use of the same drive shaft. An especially useful application for this apparatus is the "centering" of small size documents on a glass platen for copying.

As shown in Figure 1, the drive mechanism mainly consists of a drive source and two sets of torque loaded rolls A and B which are engaged through two perpendicular bevel gears 10 and 12. Each set of the rolls is driven by a belt (0- ring) 14 and can be pressed down by the torque generated by the one-way wrap-spring clutch 16 when shaft 13 is rotated CW (as viewed from the side of the bevel gear). The rolls can be lifted (without contacting the platen or document) with the aid of a tension or torsional spring 17 when the...