Developing device having a space for receiving and increasing pr

Details Developing device having a space for receiving and increasing pr Developing device having a space for receiving and increasing pr

1990-07-16

1991-09-10

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118653, 355259, G03G 1509

Patent

active

050478052

ABSTRACT:
A developing device having a toner carrying member for transporting toner to a photosensitive member, a toner supplying member facing to the toner carrying member with an opening therebetween for supplying toner to the toner carrying member and a seal member for substantially closing a toner path. In the developing device a scraping member is further provided in contact with the toner supplying member to scrape the toner therefrom and an accommodating space is formed by the toner carrying member, toner supplying member, seal member and scraping member. Thus the toner transported by the toner supplying member is accommodated in the accommodating space and then supplied to the toner holding member under pressure accompanied by the increase of the toner accommodated therein, whereby an adequate quantity of toner is supplied for development.

REFERENCES:
patent: 4760422 (1988-07-01), Seimiya et al.
patent: 4786936 (1988-11-01), Ikegawa et al.
patent: 4791882 (1988-12-01), Enoguchi et al.
patent: 4809034 (1989-02-01), Murasaki et al.
patent: 4827869 (1989-05-01), Takagi
patent: 4851872 (1989-07-01), Murasaki et al.
patent: 4912513 (1990-03-01), Oka et al.
patent: 4947212 (1990-08-01), Ikegawa et al.

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