Browse Prior Art Database

INVERTED SYNCHRONOUS TIMING BELT DRIVE SYSTEM

IP.com Disclosure Number: IPCOM000026566D
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06

Publishing Venue

Xerox Disclosure Journal

Abstract

Present day copiedprinter machines are designed such that one or more of the processing stations may be included in a process unit or cartridge which is removable from the main body of the copier for replacement by a new unit when its life is exhausted or for replacement by a different unit having different capability, such as, the developer housing. Some machines drive the photoreceptor and developer housing with a gear train which is opened each time the photoreceptor and developer customer replaceable units (CRU's) are removed for replenishment, and when the upper part of the clamshell copier housing is opened for other purposes. In order to allow the drive to be reliably "broken" and restored, pivoting idler gears are provided. These idlers are mounted so that the driving torque to the CRU's driven gears draws the idlers into mesh. This is conventional design whenever a gear train may need to be opened, as in many copiers which use a clamshell architecture for jam clearance.

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Page 1 of 10

XEROX DISCLOSURE JOURNAL

INVERTED SYNCHRONOUS Proposed Classification TIMING BELT DRIVE SYSTEM
US. James A. Salomon C1.355/235

Int. C1. G03g 15/28

NG. 1

XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 SeptembedOctober 1992 333

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Page 2 of 10

INVERTED SYNCHRONOUS TIMING BELT DRIVE SYSTEM(Cont'd)

- 10

70

FIG. 2

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

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Page 3 of 10

INVERTED SYNCHRONOUS TIMING BELT DRIVE SYSTEM(Cont'd)

FIG. 2A

XEROX DISCLOSURE JOURNAL - 1701.17 No. 5 SeptembedOctober 1992 335

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

Page 4 of 10

INVERTED SYNCHRONOUS TIMING BELT DRIVE SYSTEM(Cont'd)

'112

FIG. 3

FIG. 3A

1

'112

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

FIG. 3B

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

Page 5 of 10

INVERTED SYNCHRONOUS TIMING BELT DRIVE SYSTEM(Cont'd)

FIG.

215 \w

200

210

75 FIG. 4A

FlG.4B

XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 September/October 1992 337

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Page 6 of 10

INVERTED SYNCHRONOUS TIMING BELT DRIVE SYSTEM(Cont'd)

Present day copiedprinter machines are designed such that one or more of the processing stations may be included in a process unit or cartridge which is removable from the main body of the copier for replacement by a new unit when its life is exhausted or for replacement by a different unit having different capability, such as, the developer housing. Some machines drive the photoreceptor and developer housing with a gear train which is opened each time the photoreceptor and developer customer replaceable units (CRU's) are removed for replenishment, and when the upper part of the clamshell copier housing is opened for other purposes. In order to allow the drive to be reliably "broken" and restored, pivoting idler gears are provided. These idlers are mounted so that the driving torque to the CRU's driven gears draws the idlers into mesh. This is conventional design whenever a gear train may need to be opened, as in many copiers which use a clamshell architecture for jam clearance.

With most gear trains, it is difficult to meet rigorous photoreceptor and developer drive motion specifications for raster images, particularly halftones which are very sensitive to photoreceptor motion errors. Photoreceptor motion errors can be minimized by the use of expensive, high quality gears for the driven, drive and pivoting idler gears, but would be prohibitively expensive and open to damage due to contamination.

Heretofore, expensive and cumbersome means have been provided to facilitate removal and mounting of an assembly within a machine, for example, U. S. Patent 3,664,204 discloses a multiple roller belt assembly for an electrostatic printing machine including an endless photoconductive belt and two horizontal shafts, one of which is rotatably driven and the other of w...