Browse Prior Art Database

PHOTOCOPIER DRIVE MECHANISM

IP.com Disclosure Number: IPCOM000023860D
Original Publication Date: 1979-Feb-28
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 250K

Publishing Venue

Xerox Disclosure Journal

Abstract

A drive mechanism for driving a scanning optical system and a photoreceptor of a photocopier in synchronism. The half.-ratescanning system shown includes mirrors 12, 13 and reciprocating carriages 21, 22. The photoreceptor 23 and the carriage assembly 21, 22 are driven from a motor 20 through an endless cable or chain which passes over a drive pulley 2 and a pulley 3 mounted for rotation with the photoreceptor. The photoreceptor is driven through the pulley 3 and carriage assembly is driven through a pawl mechanism 5. The pawl 5 is pivotally mounted on the full rate carriage 21 and is arranged to be engaged by detents 6 equally spaced

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XEROX DISCLOSURE JOURNAL

PHOTOCOPIER DRIVE MECHANISM Proposed~Derek~Iasham Classification

U.S. CI. 355/8

mt. Cl. G03g 15/28

A drive mechanism for driving a scanning optical system and a photoreceptor of a photocopier in synchronism. The half.~ratescanning system shown includes mirrors

12, 13 and reciprocating carriages 21, 22. The photoreceptor 23 and the carriage assembly 21, 22 are driven from a motor 20 through an endless cable or chain which passes over a drive pulley 2 and a pulley 3 mounted for rotation with the photoreceptor. The photoreceptor is driven through the pulley 3 and carriage assembly is driven through a pawl mechanism 5. The pawl 5 is pivotally mounted on the full rate carriage 21 and is arranged to be engaged by detents 6 equally spaced

along the cable chain 31 by a distance equal to the circumference of drum 23. In operation, when a detent 6 engages the pawl 5 the carriage assembly scans from its start~of-scan position shown towards the left, The carriage 21 is pulled along directly by the engagement of detent 6 with pawl 5, the movement of the carriage 22 being controlled by connecting cables 7, 8 connected between the full rate

carriage 21 and fixed points 7a, 8a via pulleys 7b, 8b on the halfrate carriage 22. At the end of the scanning stroke of the carriage assembly the pawl strikes a release or knock~off member 4 and disengages from the detent 6. Upon the pawl being released, the carriage assembly is driven back to its start~of-~scanposi...