Photocopying – Contact printing – Light boxes
Patent
1990-05-24
1992-01-07
Moses, R. L.
Photocopying
Contact printing
Light boxes
355260, G03G 1506
Patent
active
050795899
ABSTRACT:
A developing unit of an image forming apparatus is for developing a latent image formed on a photoconductive drum. The developing unit comprises a developing device attachable to and detachable from the image forming apparatus body in a direction crossing the axis of the photoconductive drum, and a hopper fixed to the body of the image forming apparatus for supplying toner to the developing device connected to the body of the image forming apparatus. The hopper has a toner supply pipe which can assume a supply position, in which it is inserted in a connecting opening of the developing device, and a drawn position, in which it is drawn out from the developing device. The developing unit may have a lever to move the toner supply pipe to the drawn position. The lever can assume a first position not to allow the developing device to be withdrawn when the end of the toner supply pipe is in the supply position, and a second position to allow the developing device to be withdrawn when the end of the toner supply pipe is in the drawn position.
REFERENCES:
patent: 4839691 (1989-06-01), Tagawa et al.
patent: 4916490 (1990-04-01), Tanaka et al.
patent: 4937625 (1990-06-01), Kato et al.
patent: 4956668 (1990-09-01), Arnold et al.
Shibata Kiyotaka
Shirasaki Seiichi
Mita Industrial Co. Ltd.
Moses R. L.
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