Image forming apparatus in which multiple developing units are s

Details Image forming apparatus in which multiple developing units are s Image forming apparatus in which multiple developing units are s

1986-04-03

1987-12-15

Grimley, A. T.

Photocopying

Including fiber optics

355300, G03G 1501

Patent

active

047136731

ABSTRACT:
An image forming apparatus comprises four developing units for developing an electrostatic latent image formed on a photosensitive drum, and a revolving unit for revolving the developing units in parallel relation and selecting one of the developing units for use by stopping to revolve the developing units at a predetermined position. The four developing units are stored individually with developing agents of different types. The revolving unit is supported by a rockable suspension member at a distance from the center of rocking of the member, and can swing toward and away from the drum. The revolving unit is moved toward and away from the drum by a shifting mechanism. A locating member is attached to each developing unit, while a locating pin is provided on a housing of the apparatus. When the revolving unit is brought close to the drum by the shifting mechanism, the relative positions of the drum and the developing unit selected by the revolving unit are determined.

REFERENCES:
patent: 3906897 (1975-09-01), Davidson
patent: 3987756 (1976-10-01), Katayama et al.

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