Process cartridge and image forming apparatus using same

Details Process cartridge and image forming apparatus using same Process cartridge and image forming apparatus using same

1989-08-01

1990-12-04

Braun, Fred L.

Photocopying

Contact printing

Light boxes

355259, G03G 1506

Patent

active

049757466

ABSTRACT:
The present invention relates to a process cartridge removably mountable on an image forming apparatus comprising a support, a rotary member having an image bearing surface and rotatably supported by the support, and a rotatable developing roller supported by the support, for carrying developer thereon and supplying the developer to the image bearing surface to develop a latent image formed on the image bearing surface. A first gear is arranged coaxial with the rotary member, a second gear is arranged coaxial with the developing roller and meshed with the first gear, and a guide means is provided for guiding the developing roller in a direction toward and away from the rotary member. The direction in which the developing roller is guided by the guide means is inclined with respect to a straight line connecting the center of rotation of the rotary member to the center of rotation of the developing roller, by an angle between 0.7.times..THETA. (.THETA. is a pressure angle of the second gear) and 1.3.times..THETA.. The cartridge further includes a bias means for biasing the developing roller toward the image bearing surface.

REFERENCES:
patent: 3256855 (1963-04-01), Oliphant
patent: 3808025 (1974-04-01), Fukushima et al.
patent: 4400079 (1983-08-01), Landa
patent: 4714337 (1987-12-01), Nishino et al.
patent: 4768055 (1988-08-01), Takamatsu et al.

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