Photocopying – Contact printing – Light boxes
Patent
1990-12-10
1993-05-11
Moses, Richard L.
Photocopying
Contact printing
Light boxes
355245, G03G 1501, G03G 1508
Patent
active
052105849
ABSTRACT:
An image forming apparatus including a movable type developing unit carrying a plurality of developing devices for performing a developing function using a plurality of color toners. The developing unit is vertically moved along a photosensitive drum. It is detected by a sensor whether or not a selected developing device is at a first position of the level of the developing position. In carrying out a developing operation, the developing device at the first position is moved to a second position adjacent to a photosensitive drum. The following problems are detected based on the ON and OFF state of the sensor: if the developing device does not move to the second position a predetermined period of time after an instruction for moving it from the first position to the second position is issued or if the developing device does not move to the first position a predetermined period of time after an instruction for returning it from the second position to the first position is issued. Based on the detection of the above problems, the developing unit is prohibited from vertically moving and copy paper is discharged from the apparatus.
REFERENCES:
patent: 4615612 (1986-10-01), Ohno et al.
patent: 4841329 (1989-06-01), Kasamura et al.
patent: 4841336 (1989-06-01), Kusumoto et al.
patent: 4885611 (1989-12-01), Higashio et al.
patent: 4891672 (1990-01-01), Takagi
patent: 4894684 (1990-01-01), Nakajima et al.
patent: 4928146 (1990-05-01), Yamada
patent: 4937624 (1990-06-01), Kohtani et al.
patent: 4937626 (1990-06-01), Kohtani et al.
patent: 4939548 (1990-07-01), Yamada et al.
patent: 4941018 (1990-07-01), Kasamura et al.
patent: 4952987 (1990-08-01), Takamo
patent: 4958191 (1990-09-01), Yamada et al.
patent: 4963935 (1990-10-01), Kawabuchi
Ogino Shigeo
Shiotsuka Kazuaki
Minolta Camera Kabushiki Kaisha
Moses Richard L.
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