Photocopying – Contact printing – Light boxes
Patent
1991-10-10
1993-04-06
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355271, 355315, G03G 1516
Patent
active
052007847
ABSTRACT:
A toner image transferring device is applied to, for example, an electrophotographic printer for electrostatically transferring a charged toner image from a photosensitive drum to a sheet or paper. The device encompasses a transfer charger disposed near the drum to form a clearance therebetween for feeding an electric charge to the sheet or paper through which the sheet or paper is passed, an electric source for supplying an electric energy to the transfer charger to give the sheet or paper an electric charge having a polarity opposite to that of the charge of the toner image, and a controller for controlling the electric energy output from the electric source the transfer charger so that a leading edge of the sheet or paper can be prevented from being excessively charged.
REFERENCES:
patent: 3970381 (1976-07-01), Meagher et al.
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patent: 4055380 (1977-10-01), Borostyan
patent: 4190348 (1980-02-01), Friday
patent: 4286862 (1981-09-01), Akita et al.
patent: 4896192 (1990-01-01), Kinoshita
patent: 5012293 (1991-04-01), Aldrich et al.
Iwamasa Akiyoshi
Iwasaki Hideaki
Kimura Masatoshi
Kitao Ryo
Konishi Masao
Fujitsu Limited
Grimley A. T.
Ramirez Nestor R.
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