Photocopying – Contact printing – Light boxes
Patent
1993-02-17
1995-04-25
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355274, 355277, G03G 1514
Patent
active
054103932
ABSTRACT:
An image forming apparatus according to the present invention includes an image bearing member, a latent image forming device for forming an electrostatic latent image on the image bearing member, a developing device for developing the latent image into a toner image with toner charged to a polarity which is the same as the charging polarity of the latent image, and a transfer charger for electrostatically transferring the toner image from the image bearing member onto a transfer material. According to the present invention, the transfer charger is supplied with a voltage having the same polarity as that of a potential of the image bearing member contacted with an end of the transfer material when the end of the transfer material is at a transfer position. Moreover, in the case that a part other than a leading or trailing end of the transfer material is at the transfer position, the transfer charger is supplied with the voltage having an opposite polarity to the image bearing member.
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Canon Kabushiki Kaisha
Grimley A. T.
Ramirez Nestor R.
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