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MIRROR CARRIAGE FOR A DOCUMENT SCANNING SYSTEM

IP.com Disclosure Number: IPCOM000025470D
Original Publication Date: 1985-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 68K

Publishing Venue

Xerox Disclosure Journal

Abstract

A document scanning system for a photocopying device generally requires an illumination lamp and mirror assembly to scan the document in a parallel path beneath the document platen. The lamp and mirrors are mounted on a carriage typically driven by a cable/pulley drive system. Forces generated during acceleration of the carriage create forces which tend to cause carriage displacement (wo b bl e ) .

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XEROX DISCLOSURE JOURNAL

MIRROR CARRIAGE FOR A DOCUMENT SCANNING SYSTEM U.S. Cl. 355/8 Michael J. Carlotta, Jr.

Proposed Classification

Int. Cl. G03g 15/28

A document scanning system for a photocopying device generally requires an illumination lamp and mirror assembly to scan the document in a parallel path beneath the document platen. The lamp and mirrors are mounted on a carriage typically driven by a cable/pulley drive system. Forces generated during acceleration of the carriage create forces which tend to cause carriage displacement (wo b bl e ) .

The figure shows a portion of a scanning carriage 10 adapted to be driven along an inboard guide rod 12 and an outboard guide rail 14. Rod 12 and rail 14 are

Volume 10 Number 4 July/August 1985 22 1

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

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MIRROR CARRIAGE FOR A DOCUMENT SCANNING SYSTEM (Cont'd)

positioned in a plane parallel to that of the document platen. The carriage 10 is driven by a cable drive system 16, a portion of which is shown in the figure. A bias spring 18 is mounted to a portion of the carriage frame (ground) and is set to apply a biasing force to the outboard side of the carriage. The biasing force is determined by the carriage displacement during acceleration and acts on the carriage for a short distance of its intended travel. The result is to inhibit carriage cocking and wobble caused by the combination of bushing shift clearance and the drive forces applied to the inboard...