Photocopying – Contact printing – Light boxes
Patent
1991-09-24
1993-02-09
Moses, Richard L.
Photocopying
Contact printing
Light boxes
355309, G03G 1514
Patent
active
051856336
ABSTRACT:
An image forming apparatus comprising a rotatable transfer drum, chucking member provided at the transfer drum for chucking a transfer paper on the transfer drum and a sensor provided in the vicinity of the transfer drum for detecting the light passing through the transfer drum. In the image forming apparatus, the above single sensor is operable for detecting mischucking of the transfer paper and for detecting whether the transfer paper is a plain paper or OHP paper.
REFERENCES:
patent: 4819025 (1989-04-01), Takahashi et al.
patent: 4851927 (1989-07-01), Moriya
patent: 4862214 (1989-08-01), Kasahara et al.
patent: 4872037 (1989-10-01), Kasahara et al.
patent: 4935776 (1990-06-01), Fukui
Kawai Naotoshi
Maekawa Kazunobu
Minolta Camera Kabushiki Kaisha
Moses Richard L.
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