Photocopying – Including fiber optics
Patent
1981-11-02
1983-12-06
Prescott, A. C.
Photocopying
Including fiber optics
355 3P, 355 14TR, 118 56, 118641, 430126, 430130, 430136, G03G 1500
Patent
active
044190050
ABSTRACT:
An electrostatic method of making transparencies and apparatus for practicing said method. An endless electrophotographic belt is charged, imaged and toned with a liquid toner suspension. The belt with the toned image is brought into close proximity to a precisely dimensioned gap defined by a transfer roller along with a sheet of transfer material comprising a transparent substrate polyester carrying a thin ohmic layer bonded thereto and a thin overcoat of a compatible resinous material on the ohmic layer and bonded thereto. An electrical bias is applied across the gap between the belt and the overcoated ohmic layer. The toner particles migrate electrophoretically toward the transfer sheet. Subsequent to transfer, heat is applied to the transfer sheet sufficient to soften the overcoating embedding the transferred toner particles of the toner image within the resin. The transfer material is cooled. The resulting transparency comprises the coated transparent member having the toner image embedded in the resin coating below the surface thereof.
REFERENCES:
patent: 3741760 (1973-06-01), Snelling
patent: 3893761 (1975-07-01), Buchan et al.
patent: 4055418 (1977-10-01), Buckley et al.
patent: 4073583 (1978-02-01), Teumer et al.
patent: 4320186 (1982-03-01), Kato et al.
Coulter Systems Corporation
Prescott A. C.
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