Method and apparatus for producing single pass highlight and cus

Details Method and apparatus for producing single pass highlight and cus Method and apparatus for producing single pass highlight and cus

1990-09-04

1992-06-09

Braun, Fred L.

Photocopying

Contact printing

Light boxes

430 45, G03G 1501, G03G 1508

Patent

active

051211726

ABSTRACT:
Single Pass Highlight Color (SPHLC) and Single Pass Custom Color (SPCC) images are made possible on a single print using relatively high development fields compared to the prior art. Three scavengeless development housings, one with the specified custom color toner, one with a highlight color toner, and one with black toner (or another color desired for non-highlight images) are utilized. The black development system has toner of one polarity, for example, positive. The two color systems both use negatively charged toner. Alternatively, the black toner may be negatively charged in which case the custom and highlight color toners would be positively charged.

REFERENCES:
patent: 4078929 (1978-03-01), Gundlach
patent: 4459009 (1984-07-01), Hays et al.
patent: 4731634 (1988-03-01), Stark
patent: 4868600 (1989-09-01), Hays et al.
patent: 4876575 (1989-10-01), Hays
patent: 4913348 (1990-04-01), Hays
patent: 4959286 (1990-09-01), Tabb
patent: 4998139 (1991-03-01), May et al.
patent: 5010367 (1991-04-01), Hays

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