Photocopying – Contact printing – Light boxes
Patent
1992-11-16
1994-05-10
Grimley, A. T.
Photocopying
Contact printing
Light boxes
118651, 118658, 355261, G03G 1508
Patent
active
053112636
ABSTRACT:
A developing apparatus for image forming equipment capable of insuring images with high resolution while preserving tonality. A developing sleeve is provided with conductive portions and insulative portions on its surface by knurling. A magnetic roller is accommodated in the sleeve to constitute a developing roller. A toner supply roller is held in contact with the developing sleeve. A doctor blade is disposed above and spaced apart by a predetermined distance from the developing sleeve and made of a magnetic material. Bias applying means applies an alternating voltage to the sleeve to effect reversal development.
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Enoki Shigekazu
Iwata Naoki
Suzuki Koji
Tomita Junko
Ueno Yuichi
Beatty Robert
Grimley A. T.
Ricoh & Company, Ltd.
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