Developer backer bar that allows a large amount of photoreceptor

Details Developer backer bar that allows a large amount of photoreceptor Developer backer bar that allows a large amount of photoreceptor

1998-06-26

2000-03-07

Royer, William

Electrophotography

Image formation

Photoconductive member

399222, G03G 1500

Patent

active

060351616

ABSTRACT:
A developer backer bar having a surface having a plurality of radii for interfacing with a noncontact developer member. The backer bar is arranged so that it can be retracted for clearance purposes when removing or inserting a xerographic CRU. Upon installation of the CRU, the backer bar is biased into position to maintain a development zone within predetermined parameters. The multiple radii surface eliminates or minimizes errors that may result from slight variations in axial alignment between the backer bar and the developer member while additionally providing low drag forces on the photoreceptor.

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patent: 5338893 (1994-08-01), Edmunds et al.
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patent: 5708924 (1998-01-01), Shogren et al.
patent: 5953565 (1999-09-01), Fiore et al.
Research Disclosure, "Photoconductor-Development Applicator Spacing Mechanism", Jun. 1994, No. 362, Emsworth, GB, p. 281, XP 000461247.
Patent Application 08/838,631, entitled "Developer Backer Bar That Allows Axial Misalignment Between the Backer Bar and The Developer Donor Roll", filed Apr. 11, 1997.

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