Photocopying – Contact printing – Light boxes
Patent
1990-08-30
1991-08-06
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355210, G03G 1500, G03G 2100
Patent
active
050381741
ABSTRACT:
An image forming apparatus has an image forming unit which is detachably mounted in the stationary main part of the apparatus. The unit includes an image carrier with a photosensitive layer, a charging device capable of electrostatically charging the image carrier in contact therewith, and a housing supporting the image carrier and the charging device and provided with an exposure opening. An air flow is positively formed such that, with the image forming unit mounted in a predetermined mounting portion in the apparatus, air flows from regions near both ends of the image carrier towards the exposure opening past a region where the charging device contacts the image carrier. With this arrangement, ozone generated in the image forming unit due to operation of the contact type charging device is efficiently carried away from the image forming unit, thus eliminating generation of image defects attributable to presence of ozone and other discharge products.
REFERENCES:
patent: 4040731 (1977-08-01), Nishikawa
patent: 4540268 (1985-09-01), Toyono et al.
patent: 4720727 (1988-01-01), Yoshida
patent: 4851960 (1989-07-01), Nakamura et al.
patent: 4853735 (1989-08-01), Kodama et al.
Goto Masahiro
Inoue Takahiro
Kato Jun-ichi
Suwa Koichi
Yano Hideyuki
Canon Kabushiki Kaisha
Grimley A. T.
Ramirez Nestor R.
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