Traversing, intermittently contacting sheet pickoff for electrop

Details Traversing, intermittently contacting sheet pickoff for electrop Traversing, intermittently contacting sheet pickoff for electrop

1983-07-13

1985-04-16

Prescott, A. C.

Photocopying

Including fiber optics

G03G 1500

Patent

active

045112380

ABSTRACT:
A pickoff element for separating a carrier sheet from the photoconductor drum of a liquid-developer electrophotographic copier following transfer of a developed toner image to the sheet is incrementally moved transversely of the direction of movement of the photoconductor to distribute wear over a relatively large portion of the photoconductor surface. Upon its return to home position, a copier scanner casting strikes an actuator arm coupled through a one-way clutch to a double-helix lead screw, extending parallel to the drum axis, to impart incremental unidirectional rotation to the lead screw. A follower engaging the lead screw is coupled to the pickoff element to shift the pickoff element transversely in response to the rotation of the lead screw. The pickoff element is normally retracted from the photoconductor, and is only moved into engagement with the photoconductor during selected portions of the copy cycle to minimize drum wear, as well as to avoid pickup of toner particles that have been attracted onto a non-image portion of the photoconductor from the development electrode during a cleaning stage of the copy cycle.

REFERENCES:
patent: 3885786 (1975-05-01), Schmalzbauer
patent: 3992000 (1976-11-01), Martin
patent: 4342043 (1982-07-01), Palermiti et al.
patent: 4363550 (1982-12-01), Toshimitsu et al.
patent: 4387981 (1983-06-01), Cormier
patent: 4420243 (1983-12-01), Baker et al.

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