Double sleeve developing device

Details Double sleeve developing device Double sleeve developing device

1984-03-22

1986-02-25

Prescott, A. C.

Photocopying

Including fiber optics

355 14D, 118658, 430122, G03G 1508

Patent

active

045726310

ABSTRACT:
A device for developing an electrostatic latent image by applying magnetic toner is provided. The device includes a first transporting sleeve for transporting the magnetic toner along a first transporting path as carried thereon with the toner supplied from a hopper and a second transporting sleeve for transporting the toner along a second transporting path, which passes through a developing station where the latent image is developed, as carried thereon with the toner transferred from the first sleeve at least partly. There are also provided a first doctor blade for forming a first film of toner on the first sleeve and a second doctor blade for forming a second film of toner on the second sleeve. Thus, the toner is conditioned by the first sleeve before being formed into the second film which is actually used at the developing station for development, thereby insuring the high quality, uniform charge distribution, and stable operation of the improved developing device without causing irregularities in density and without background contamination.

REFERENCES:
patent: 4350432 (1982-09-01), Kondoh
patent: 4364656 (1982-12-01), Yanagawa
patent: 4406535 (1983-09-01), Sakamoto et al.
patent: 4406536 (1983-09-01), Suzuki et al.
patent: 4425382 (1984-01-01), Tajima
patent: 4449810 (1984-05-01), Ikesue et al.
patent: 4461238 (1984-07-01), Baier et al.
IBM Technical Disclosure Bulletin, vol. 15, No. 4, Sep. 1972, _Freeman et al.

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