Developer apparatus for a highlight printing apparatus

Details Developer apparatus for a highlight printing apparatus Developer apparatus for a highlight printing apparatus

1986-12-29

1988-09-13

Salce, Patrick R.

Photocopying

Including fiber optics

355 3CH, 430 42, G03G 1500

Patent

active

047713143

ABSTRACT:
Printing apparatus for forming toner images in black and at least one highlighting color in a single pass of a change retentive imaging surface through the processing areas, including a development station, of the printing apparatus. The development station includes a pair of developer housings each of which has supported therein a pair of magnetic brush development rolls which are electrically biased to provide electrostatic development and cleaning fields between the charge retentive surface and the developer rolls. The rolls are biased such that the development fields between the first rolls in each housing and the charge retentive surface are greater than those between the charge retentive surface and the second rolls and such that the cleaning fields between the second rolls in each housing and the charge retentive surface are greater than those between the charge retentive surface and the first rolls.

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