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METHOD OF MAINTAINING COEFFICIENT OF FRICTION BETWEEN PHOTORECEPTOR AND DRIVE ROLLER

IP.com Disclosure Number: IPCOM000027066D
Original Publication Date: 1995-Feb-28
Included in the Prior Art Database: 2004-Apr-07
Document File: 4 page(s) / 166K

Publishing Venue

Xerox Disclosure Journal

Abstract

Typical belt photoreceptor drive systems (i.e. Xerox machines 1065, 1075, 1090, 5090F and new mid-volume machines) rely on the frictional characteristics between the back of the photoreceptor belt and the drive roll to provide a sufficient drive force to overcome the drag generated by xerographic process elements. For future mid-volume products, the combination of acoustic transfer assist (ATA) vacuum and the photoreceptor cleaner are expected to create about 4 to 6 pounds of drag. While the drive capability when the system is clean and new is sufficient (photoreceptor to roll coefficient of friction 1 to 2, which provides 7 to 10 pounds drive force) to overcome these drags, when the drive roll and photoreceptor back become contaminated, the drive capability drops (coefficient of friction 0.2 through 0.4, which provides two to three pounds drive force) below the required level and belt slip on the drive roll will occur.

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Page 1 of 4

XEROX DISCLOSURE JOURNAL

METHOD OF MAINTAINING Proposed Classification COEFFICIENT OF FRICTION U.S. C1.355/299 BETWEEN PHOTORECEPTOR
AND DRIVE ROLLER
Clark V. Lange

Int. C1. G03g 21/00

31 31

FIG. 1 FIG. 2

XEROX DISCLOSURE JOURNAL - Vol. 20, No. 1 JanuaryIFebruary 1995 69

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Page 2 of 4

METHOD OF MAINTAINING COEFFICIENT OF FRICTION BETWEEN PHOTORECEPTOR AND DRIVE ROLLER (Cont'd)

Typical belt photoreceptor drive systems (i.e. Xerox machines 1065, 1075, 1090, 5090F and new mid-volume machines) rely on the frictional characteristics between the back of the photoreceptor belt and the drive roll to provide a sufficient drive force to overcome the drag generated by xerographic process elements. For future mid-volume products, the combination of acoustic transfer assist (ATA) vacuum and the photoreceptor cleaner are expected to create about 4 to 6 pounds of drag. While the drive capability when the system is clean and new is sufficient (photoreceptor to roll coefficient of friction 1 to 2, which provides 7 to 10 pounds drive force) to overcome these drags, when the drive roll and photoreceptor back become contaminated, the drive capability drops (coefficient of friction 0.2 through 0.4, which provides two to three pounds drive force) below the required level and belt slip on the drive roll will occur.

Referring to Figures 1 and 2, the present invention provides a means to clean the back of the photoreceptor 10 in combination with the dirt seal 30 around the drive roll 20. The cleaner proposed for the back of the photoreceptor includes a series of "weak" adhesive rolls. Examples of a "weak" adhesive roll include an adhesive clothes lint brush or the adhesive on a "Post-It"".

Figure 1 shows how rolls can be added to the belt module. If two or more rolls were placed in series prior to the drive roll, the first adhesive roll 40 at position 1 would most likely become more contaminated than that of the second adhesive roll 50 at osition 2. (Position 1 is in front of position 2, in the

Figure 2, the service representative moves the second roll 50 to the first position and puts a new roll 60 in the second position. The cost of these additional rolls can be minimized by providing the adhesive surface in double sided sheet form for application by a service representative to an existing roll in the belt module. The use of a slightly stronger adhesive on the side of the double sided sheet facing the roll surface, would ensure it would not peel off the roll during operation.

In combination with the adhesive rolls, it is proposed that a seal be placed around the drive roller (see Figures 1 a...