Image forming apparatus having recycling of residual toner

Details Image forming apparatus having recycling of residual toner Image forming apparatus having recycling of residual toner

1998-06-19

2000-08-29

Beatty, Robert

Electrophotography

Cleaning of imaging surface

Having handling of removed material

G03G 2110

Patent

active

061120464

ABSTRACT:
An image forming apparatus capable of collecting toner left on an image carrier after image transfer during an electrophotographic process, and returning the toner to a developing unit for reuse in the form of an air-toner mixture is disclosed. A toner conveying device includes a screw pump and a hopper portion positioned upstream of the screw pump in the intended direction of toner conveyance. When the collected toner accumulating in the hopper portion reaches a preselected amount, the toner conveying device is caused to start and stop operating at a specific timing.

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patent: 5592267 (1997-01-01), Misago et al.
patent: 5734957 (1998-03-01), Ogawa et al.

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