Photocopying – Contact printing – Light boxes
Patent
1991-11-08
1993-06-15
Grimley, A. T.
Photocopying
Contact printing
Light boxes
271162, 3461601, 355277, G03G 1501
Patent
active
052203875
ABSTRACT:
A transfer unit of an image forming apparatus includes a transfer device, a pressing member, and a regulative member. The transfer device is provided adjacent to a photoconductor of the image forming apparatus and is separable from the photoconductor under its own weight. The pressing member presses the transfer device against the photoconductor. The regulative member regulates the distance by which transfer device is separated from the photoconductor when the pressing member disengages the transfer device therefrom. In this transfer unit, if a printing sheet is large, the pressing member disengages the transfer device after a given transfer operation. As a result, the transfer device separates from the photoconductor under its own weight, with the distance separating the transfer device from the photoconductor being regulated by the regulative member. Then, the transfer device idles in the separated state, wherein preparation for a subsequent transfer operation is made. In this manner, the transfer device is idled simply by regulating the movement of the transfer device through means of the regulative member. Consequently, little distortion occurs to the transfer unit support frames, and deterioration of the quality of the transferred images is thus checked.
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Kanou Atsushi
Katafuchi Toshinobu
Mizutani Naoki
Osaka Toshiyuki
Tsunoda Arihiro
Dang T. A.
Grimley A. T.
Mita Industrial Co. Ltd.
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