Multicolored printing method and device

Details Multicolored printing method and device Multicolored printing method and device

1988-03-08

1990-01-30

Grimley, A. T.

Recorders

Electric recording

Electrochemical

346157, 355211, 355326, 400119, G01D 1506, G01D 1520, B41J 302, B41J 304

Patent

active

048976776

ABSTRACT:
A process and an apparatus for laser printing multicolored images are described. The printer includes means for feeding a paper sheet or other recording medium continually with predetermined pauses through a transfer zone and means for moving a recording drum across the surface of said paper sheet in a direction perpendicular to the direction of the paper feed. The recording drum has associated therewith an exposure system and a developer means for applying a latent image and toner, respectively, to said drum. The drum containing toner is rolled across the surface of the paper to effect printing during the periods when the paper feeding means pauses. An erasure means is provided to remove residual toner from the drum after the printing operation. Preferably the exposure system constitutes a plurality of zones, each capable of imaging contiguous areas of the drum and a corresponding plurality of developer zones, each positioned to apply toner to one of the discrete areas of said drum. Optimally, four separate zones are provided in the exposure system and developer means, each to apply a different color (e.g., red, yellow, blue and black), thereby enabling the printer to produce full color prints.

REFERENCES:
patent: 4511268 (1985-04-01), Marshall
patent: 4639749 (1987-01-01), Ito

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