Image forming apparatus including a toner recycling mechanism

Details Image forming apparatus including a toner recycling mechanism Image forming apparatus including a toner recycling mechanism

1999-02-02

1999-11-16

Lee, Susan S. Y.

Electrophotography

Cleaning of imaging surface

Having handling of removed material

399260, G03G 2110, G03G 1508

Patent

active

059872985

ABSTRACT:
In an electrophotographic image forming apparatus including a toner recycling mechanism, a collected toner conveying device is free from troubles particular to a conventional device using a screw pump and an air pump and conveying toner and air mixture via an elastic tubing, i.e., the wear of a stator due to aging and a decrease in the delivery pressure of the pump ascribable to the wear. A control device controls, based on the cumulative operation time, an operation of the screw pump and an operation of the air pump. This provides the toner conveying device with durability, reliability and simple construction while insuring toner conveyance and reducing cost.

REFERENCES:
patent: 5638159 (1997-06-01), Kai et al.
patent: 5797074 (1998-08-01), Kasahara et al.
patent: 5815784 (1998-09-01), Kasahara et al.
patent: 5909609 (1999-06-01), Yahata et al.

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