Developing device

Details Developing device Developing device

1982-07-07

1984-10-16

Prescott, A. C.

Photocopying

Including fiber optics

355 14D, 355 15, 118652, 430125, G03G 1508

Patent

active

044771746

ABSTRACT:
A two-cycle electrophotographic copying apparatus includes a rotatable charge retaining member, a charging device, an exposure mechanism, a developing device and a transferring device sequentially arranged around the charge retaining member in the direction of its rotation. During a first rotation of the charge retaining member, a toner image of an original is formed, and during the second rotation of the charge retaining member, the remaining toner is cleaned from the charge retaining member to prepare it for its next succeeding copying operation. The developing device comprises a first sleeve-like member for developing an electrostatic latent image on the surface of the charge retaining member during the first revolution thereof, and a second sleeve-like member for cleaning remaining toner from the surface of the charge retaining member during the second rotation of the charge retaining member and for suppying the removed developer to the first sleeve-like member during the first rotation of the charge retaining member. The second sleeve-like member is movable between first and second positions which correspond respectively to the first and second rotations of the charge retaining member.

REFERENCES:
patent: 3893416 (1975-07-01), Eichorn
patent: 4265197 (1981-05-01), Toyono et al.
patent: 4320958 (1982-03-01), Fantuzzo
patent: 4339196 (1982-07-01), Beck et al.

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