Image forming apparatus

Details Image forming apparatus Image forming apparatus

1985-11-15

1987-03-24

Prescott, A. C.

Photocopying

Including fiber optics

355 14D, 355 4, G03G 1501, G03G 1508

Patent

active

046521135

ABSTRACT:
An image forming apparatus is provided with a developing unit for developing a latent image on the surface of a photosensitive drum. The developing unit includes at least two developing devices which alternatively develop the latent image, and a supporting mechanism for supporting the developing devices while keeping the developing devices parallel to each other, and for selectively causing one of the developing devices to oppose the photosensitive drum. The supporting mechanism includes a rotating member rotatable about a first rotating shaft, the rotating member supporting the developing devices to be rotatable about a plurality of second rotating shafts disposed around the first rotating shaft, a stationary pulley fixed to the rotating member so as to be coaxial with the first rotating shaft, a revolving pulley fixed to each of the developing devices so as to be coaxial with each of the second rotating shaft, and toothed belts looped between the revolving pulleys and the stationary pulley.

REFERENCES:
patent: 3795917 (1974-03-01), Yamaji et al.
patent: 3970042 (1976-07-01), Rees
patent: 3987756 (1976-10-01), Katayama et al.
patent: 4097139 (1978-06-01), Hauser et al.
patent: 4165165 (1979-08-01), Iwami et al.
patent: 4255040 (1981-03-01), Weiel et al.
patent: 4571071 (1986-02-01), Bothner

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