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US 4,049,343 AGranted
Combination imaging and grounding roller
AssigneeXerox Corporation
InventorHerman A. Hermanson
Life of this patent
Estimating the term…
Abstract
An imaging or transfer roller comprising mechanism to couple the roller to a ground potential close to the imaging or transfer zone, is provided. The roller includes insulator members concentric with the roller shaft and conductive sleeves on the ends of the roller.
Claims4
A photoelectrophoretic apparatus having in combination
- a. an injecting web electrode;
- b. a blocking web electrode which is narrower in width than said injecting electrode;
- c. means for deposition of a thin film of ink on at least one of said electrodes;
- d. means for synchronous advancement of said electrodes;
- e. means for confining of said ink film between said electrodes in an imaging zone;
- f. means for support of said web electrode in said imaging zone, said support means comprising a roller having a first conductive surface in contact with that portion of the blocking electrode substantially corresponding to the imaging zone and a second conductive surface in contact with that portion of the injecting electrode substantially outside of the imaging zone, each of the conductive surfaces in contact with the blocking web electrode and the injecting web electrode being electrically biased so as to create an electric field across the layer of ink confined between said electrodes;
- and
- g. means for projection of image information onto the confined layer of ink concurrent with the application an electric field across said ink layer.
5 more elements
Dependencies are inferred from the claim text.