Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1983-12-22
1986-09-23
Grimley, Arthur T.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
354300, 354317, G03G 1510, G03D 700, G03D 500
Patent
active
046132260
ABSTRACT:
A developing head in which liquid developer and gas are applied by a feeding system to the photosensitive surface of an electrophotographic material for electrophotographic apparatus via a developing chamber, a space being formed between the framed opening of the developing mask at its outer peripheral surface and an opposing photosensitive surface to prevent leakage of the liquid developer by capillarity between the photosensitive surface and the framed opening of the developing mask at its mouth abutting the photosensitive surface, a valve interposed between the passageways for feeding liquid developer and gas respectively in order to prevent the liquid developer from flowing into the passageway for supplying gas, and a pressure reduction apparatus to apply negative pressure between the photosensitive surface and the mouth of the framed opening when the electrophotographic material is advanced from one frame to another.
REFERENCES:
patent: 3916828 (1975-11-01), Gross
patent: 3936854 (1976-02-01), Smith
patent: 3964828 (1976-06-01), Yamada et al.
patent: 4141647 (1979-02-01), Lempke et al.
patent: 4435071 (1984-03-01), Kuehnle
Kimura Akinori
Ohtsuka Shuichi
Fuji Photo Film Co. , Ltd.
Grimley Arthur T.
Romano C.
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