Photoconductive drum and transfer apparatus for an image forming

Details Photoconductive drum and transfer apparatus for an image forming Photoconductive drum and transfer apparatus for an image forming

1995-08-16

1997-01-07

Grimley, Arthur T.

Electrophotography

Having particular structure

Adjustment

399159, 399297, G03G 1500, G03G 1514

Patent

active

055922732

ABSTRACT:
The image forming apparatus of the present invention includes a photoconductive drum, a transfer apparatus and a position adjusting apparatus. The photoconductive drum has a photoconductive-drum-sided gear and a photoconductive-drum-sided positioning cylindrical surface at an outer peripheral portion. The transfer apparatus includes a transfer drum and a transfer drum supporting shaft for rotatably supporting the transfer drum. The transfer drum has a pair of drums each having a transfer-sided positioning cylindrical surface at an outer peripheral portion thereof; a drum coupling member for integrally coupling the pair of drums with each other under a predetermined separated distance; and a transfer-sided gear which is provided on an outer peripheral of one of the pair of drums which has both the transfer-sided gear and the transfer-sided positioning cylindrical surface being integrally formed by an amorphous thermoplastic resin. The position adjusting apparatus for positioning the transfer drum close to, or apart from the photoconductive drum by swinging the transfer drum supporting shaft. When the transfer drum is positioned close to the photoconductive drum, the transfer-sided gear is meshed with the photoconductive-drum-sided gear, and the transfer-sided positioning cylindrical surface is abutted to the photoconductive-drum-sided positioning cylindrical surface.

REFERENCES:
patent: 4862214 (1989-08-01), Kasahara et al.
patent: 4965310 (1990-10-01), Harris et al.
patent: 4977297 (1990-12-01), Squire
patent: 5220387 (1993-06-01), Tsunoda et al.
patent: 5250994 (1993-10-01), Ito et al.

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