Developing device with an auger roller for providing a fresh and

Details Developing device with an auger roller for providing a fresh and Developing device with an auger roller for providing a fresh and

1997-05-22

1999-02-02

Pendegrass, Joan H.

Electrophotography

Image formation

Development

399256, 399274, G03G 1508

Patent

active

058677569

ABSTRACT:
A developing device for use in an image forming apparatus is constructed such that a pair of upper and lower auger rollers 35 and 34 are arranged in the vicinity of a toner supply port 21A, thereby to transport toner from the toner supply port 21A through a spiral tooth 34A of the lower auger roller 34 toward both ends of the supply roller 20 and from the both ends through a spiral tooth 35A toward the toner supply port 21A, thus circulating toner above the toner supply roller 20 in its both side directions, and that a position of the toner supply port 21A of a toner cartridge 21 corresponds to respective center positions 35C and 34C of the upper and lower auger rollers 35 and 34.

REFERENCES:
patent: 4760422 (1988-07-01), Seimiya et al.
patent: 5338895 (1994-08-01), Ikegawa et al.

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