Photocopying – Contact printing – Light boxes
Patent
1995-07-03
1996-05-28
Moses, R. L.
Photocopying
Contact printing
Light boxes
355246, 355259, 118688, 118653, G03G 1506
Patent
active
055216773
ABSTRACT:
A solid area process control for scavengeless development using a transport roll-to-donor roll DC bias as a control parameter in an electrophotographic printing machine is disclosed. The process develops a latent image of a solid area toner patch on a photoconductive belt. Once the patch is developed, the patch is measured with an infrared reflectance type sensor. The measured development mass is compared to a target value stored in the machine memory. A test of the comparison is performed by the process. If the result of the test is less than the target value, the transport roll-to-donor roll bias is increased and the process ends. If the result is more than the target value, the transport roll-to-donor roll bias is decreased and the process ends, otherwise the process stops because the measured development is acceptable. The process is run at predetermined intervals to maintain constant output from the electrophotographic printing machine.
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Brewington Grace T.
Germain Richard P.
Beck J. E.
Fleischer H.
Moses R. L.
Xerox Corporation
Zibelli R.
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