Developing device with agitation member and elastic member

Details Developing device with agitation member and elastic member Developing device with agitation member and elastic member

1996-06-28

1997-09-09

Pendegrass, Joan H.

Electrophotography

Image formation

Development

399258, G03G 1508

Patent

active

056666187

ABSTRACT:
An new and improved developing device for use in an image forming apparatus formed in a unitary structure constructed with a developing chamber disposed adjacent to the rotating electrostatic latent image carrying member, and a toner supply chamber for containing new toner. A developing roller is disposed in the developing chamber, for developing an electrostatic latent image formed on the rotating electrostatic latent image carrying member during operation of the image forming apparatus. An agitating roller is disposed in the developing chamber and adjacent to the developing roller, for charging the new toner as supplied from the toner supply chamber. A toner supply roller is arranged at a toner supply outlet of the toner supply chamber, for supplying the new toner from the toner supply chamber to the developing chamber during operation of the image forming apparatus. An agitation member having a contact wing disposed at its opposite ends, is disposed in the toner supply chamber for rotating and agitating the new toner contained the toner supply chamber to feed the new toner to the toner supply roller at the toner supply outlet of the toner supply chamber. An elastic member of a predetermined size formed by a cylindrical coiled spring is freely disposed in the toner supply chamber, for preventing stagnation of the new toner contained in the toner supply chamber upon rotation of the agitation member. Finally, a rib member is attached to an interior surface of the toner supply chamber, for regulating the movement of the elastic member upon rotation of the agitation member.

REFERENCES:
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patent: 5016560 (1991-05-01), Asada et al.
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patent: 5095850 (1992-03-01), Komuro
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patent: 5138385 (1992-08-01), Toyoshi et al.
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patent: 5289243 (1994-02-01), Sakamoto
patent: 5307128 (1994-04-01), Murasaki et al.

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