G - Physics – 03 – G
Patent
G - Physics
03
G
314/7
G03G 15/01 (2006.01)
Patent
CA 1203830
ABSTRACT Electrophotographic imaging apparatus, particularly for color proofing, is provided for normal daylight operation including a light-tight housing having a framework mounting plural functional processing stations, namely, a charging station, an imaging or exposure station, a toning station, an image transfer station and a cleaning station, all interior of the housing. An electrophotographic member carrying platen is translated linearly along a guide the length of the framework along a predetermined, precisely defined horizontal path. A copyboard is disposed below the carriage at the imaging station carrying a pattern carrying transparency. Starting from a home position, the platen is translated past the charging station; a surface charge potential is applied. The charged member is brought to the imaging station, the copyboard elevated to engage the intimate charged surface and radiant energy from an interior disposed source is projected through the transparency forming a latent electrostatic image and the copyboard is lowered. The platen then enters the toning station where one of a plurality of available toning modules has been raised to toning proximity to said surface for toning with liquid toner carried by said selected module during passage of said surface past said module. The selected module is lowered and the carriage translated to the transfer station where a pre-wet transfer sheet is engaged with the toned surface and the toner image transferred thereto. An electrical bias voltage is employed during transfer. The transfer medium and electrophotographic member are separated and the platen translated to the home position as any residual toner and residual charge are removed. Pins and sockets are provided for cooperation with suitable registration maintained. The process is repeated but with different transparencies and toners to produce the color proof desired.
421741
Cleveland Donald S.
Compton James C.
Kuehnle Manfred R.
Lindblom Kenneth
Poulakis John N.
Coulter Systems Corporation
Johnson Douglas S. Q.c.
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