Coulter Systems Corporation

John N Poulakis

Manfred R Kuehnle

Harold J Weber

Kenneth A Lindblom

James C Compton

Michael J Szymanski

Donald S Cleveland

Electrophotographic imaging apparatus, particularly for color proofing, is provided for normal daylight operation including a light-tight housing having a framework mounting plural spaced functional processing stations for charging, imaging, toning, transfer and, optionally, cleaning, all interior of the housing. A platen assembly mounting an electrophotographic member is translated along a linear path, the assembly being guided by a rail and a track secured along the entire length of the framework. A copyboard is disposed below the carriage within the imaging station and carries a transparency. The electrophotographic member is translated past the charging station for charging same and brought to the imaging station where the copyboard is raised, to establish an intimate engagement with the member established and exposed to an interior disposed radiant energy source. After exposure, the copyboard is lowered and the member translated to the toning station where one of plural available toning modules has been raised to intercept the platen whereby to establish a toning gap for toning with liquid toner carried by said one module during passage past said module. The member next is translated to the transfer station for transfer to a pre-wet sheet of transfer medium. A registration system is provided at both imaging and transfer stations to assure registration between the member and the transparency on the one hand and the member and the transfer medium on the other hand at the respective station whereby all functional tolerance relationships being maintained independent of the framework.

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Middlesex, MA, United States of America

John N Poulakis