Photocopying – Contact printing – Light boxes
Patent
1990-07-24
1991-09-24
Pendegrass, Joan H.
Photocopying
Contact printing
Light boxes
355296, 355326, G03G 1514, G03G 2100
Patent
active
050517830
ABSTRACT:
An electrophotographic apparatus having a cam mechanism for shifting a transfer unit and a cleaning unit of the apparatus, enabling both of them to take a contacted position and a separated position with the surface of the photoreceptor drum to perform the functions of toner image transfer and residual toner cleaning in an ordered timing. The cam mechanism is provided with a cam which is driven to rotate intermittently around an axis of the photoreceptor drum, and a transfer cam follower and a cleaning cam follower are guided by the cam. The transfer cam follower shifts the transfer unit to take a transfer position in a transfer time interval and shifts the transfer unit to a separated position from the surface of the photoreceptor drum in a non-transfer time interval. The cleaning cam follower shifts the cleaning unit to a cleaning position in a cleaning time interval and shifts the cleaning unit to a separated position from the surface of the photoreceptor in a non-cleaning time interval.
REFERENCES:
patent: 3819261 (1974-06-01), Ogawa
patent: 4465363 (1984-08-01), Schmitt et al.
patent: 4905048 (1990-02-01), Suzuki
Konica Corporation
Pendegrass Joan H.
Stanzione P. J.
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