Image forming apparatus having a transfer member

Details Image forming apparatus having a transfer member Image forming apparatus having a transfer member

1992-06-12

1993-04-13

Braun, Fred L.

Photocopying

Contact printing

Light boxes

355274, 355277, G03G 1514, G03G 2100

Patent

active

052027333

ABSTRACT:
An image forming apparatus includes an image member, for example, an endless web photoconductor, and a transfer member, for example, a transfer drum. The endless web is driven by a frictional engagement with a drive roller. A web drive output roller fixed to and rotatable with the drive roller in turn drives an idler roller which drives a drive belt positioned around the idler roller and a transfer drive member. The transfer drive member is fixed with respect to the transfer drum and rotates the transfer drum. The outside diameter of the transfer drive member is maintained equal to that of the transfer drum despite varying ambient conditions, by employing similar materials, for example, employing a similar thickness of polyurethane as the outside layer of the transfer drive member. Thus, the peripheral speed of the transfer drum stays the same as the image member despite a varying outside diameter of the transfer drum as ambient conditions vary.

REFERENCES:
patent: 3893761 (1975-07-01), Buchan et al.
patent: 3920325 (1975-11-01), Swift
patent: 4821066 (1989-04-01), Foote, Jr. et al.
patent: 4884105 (1989-11-01), Joseph et al.
patent: 4933727 (1990-06-01), Mizuma et al.

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