Coating apparatus – Control means responsive to a randomly occurring sensed...
Patent
1984-02-23
1985-10-08
Lawrence, Evan K.
Coating apparatus
Control means responsive to a randomly occurring sensed...
118411, 355 10, G03G 1510
Patent
active
045453268
ABSTRACT:
A liquid toner applicator includes a hollow housing or manifold divided into two channels. A wall of the housing common to both channels is composed of a multi-layer lamination of thin sheet layers, such as etched metal foils. The outermost wall layer constituting the bearing surface for the recording medium is formed with a pattern of slots for applying toner to the exposure surface of the medium. The innermost wall layer is formed with two sets of holes, each set being open to different housing channels. The remaining wall layers between the innermost and outermost layers are each formed with an array of slots or holes which combine and interconnect in the wall lamination to provide a first network of precisely defined toner feed pathways between one of the housing channels and one end of each of the slots in the outermost wall layer and a second network of precisely defined toner recovery pathways between the opposite end of each of the slots in the outermost layer and the other housing channel. A pump connected between the housing channels and a source of liquid toner circulates fresh toner through the channels and wall pathways so that fresh toner flows uniformly in thin layers along the slots in the outermost wall layer whereby the entire exposure surface of a recording medium is exposed uniformly to the toner as the medium advances across the applicator.
REFERENCES:
patent: 3929099 (1975-12-01), Szymber et al.
patent: 4198923 (1980-04-01), Blumenthal
patent: 4289092 (1981-09-01), McChesney et al.
Etlinger Louis
Lawrence Evan K.
Porter, Jr. Wm. F.
Sanders Associates Inc.
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