Photocopying – Contact printing – Light boxes
Patent
1987-05-21
1989-07-11
Grimley, Arthur T.
Photocopying
Contact printing
Light boxes
355208, 355246, G03G 1500
Patent
active
048476595
ABSTRACT:
An electrostatographic machine replenishes the toner in a developer mix proportionally in response to a toner depletion signal having a value indicative of the rate of toner usage. A second signal is produced having a value proportional to toning contrast; and the contrast of proportionality between toner replenishment and the depletion signal is adjusted in response to the second signal value. The toner depletion signal may be indicative of the number of character print signals applied to a print head; the characters preferably being pixels to be toned.
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Eastman Kodak Company
Grimley Arthur T.
Pipala Edward
Sales Milton S.
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