Conductive toner transfer photocopying machine

Details Conductive toner transfer photocopying machine Conductive toner transfer photocopying machine

1977-12-15

1979-11-13

Braun, Fred L.

Photocopying

Including fiber optics

250325, 355 3CH, 361229, H01T 1904, G03G 1500

Patent

active

041741706

ABSTRACT:
Photocopying machine comprising shield elements which are provided between an electrophotosensitive medium and a corona discharge unit at a transfer station, define a slit to permit transfer of conductive toner particles onto copy paper charged by the corona discharge unit but prevent imposition on the paper of a charge liable to cause early transfer of toner particles or of a charge liable to cause cancellation of the charge of the toner particles, and hence detachment, of toner particles on the copy paper.

REFERENCES:
patent: 3303401 (1967-02-01), Naumann et al.
patent: 3483372 (1969-12-01), Benson
patent: 3611074 (1971-10-01), Weichardt
patent: 3620617 (1971-11-01), Kelly et al.
patent: 3660656 (1972-05-01), Frank et al.
patent: 3811048 (1974-05-01), Matsumoto et al.
patent: 3936175 (1976-02-01), Jones
patent: 3986189 (1976-10-01), Van Biesen et al.
patent: 4053769 (1977-10-01), Nishikawa et al.
patent: 4087168 (1978-05-01), Fraser

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