Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1976-12-15
1979-02-27
Braun, Fred L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
250325, 355 3CH, 355 15, 361229, G03G 1514, H01T 1904, G03G 2100
Patent
active
041416481
ABSTRACT:
A two cycle process electrophotographic copying device having charging, imaging, developing, transferring, and cleaning facilities, the arrangement being in the conventional sense, incorporates a combined charge and preclean corona unit that is operable to perform either a charging function or a precleaning function at the proper time during a copying/cleaning cycle and a combined precharge/transfer corona unit. The combined charge and preclean corona unit includes a dual bay corona which emits negative and positive ions and a common control grid for controlling the ion flow from each bay of the dual bay corona.
REFERENCES:
patent: 2778946 (1957-01-01), Mayo
patent: 3122634 (1964-02-01), King
patent: 3527941 (1970-09-01), Culhane et al.
patent: 3656021 (1972-04-01), Furuichi et al.
patent: 3676117 (1972-07-01), Kinoshita
patent: 3700328 (1972-10-01), Davidge et al.
patent: 3736055 (1973-05-01), Davidge et al.
patent: 3990791 (1976-11-01), Tsukada
Noto, Fedele A., "Copier with Single Corona Generating Device", Xerox Disclosure Journal, vol. 1, No. 2, Feb. 1976, p. 93.
Gaitten Ronald E.
Smith Gerald L.
Braun Fred L.
Cockburn Joscelyn G.
International Business Machines - Corporation
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