Developing apparatus with pressure regulating member

Details Developing apparatus with pressure regulating member Developing apparatus with pressure regulating member

1988-10-04

1990-01-23

Braun, Fred L.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

355251, G03G 1509

Patent

active

048951056

ABSTRACT:
A magnet is disposed in a sleeve for carrying a developer. At a position between two adjacent magnetic poles along the periphery of the magnet, an elastic plate is contacted to the sleeve. The elastic plate is effective to regulate a thickness of a layer of the developer applied on the carrying member. Of the magnetic poles, the magnetic pole disposed upstream of a contact position between the elastic plate and the sleeve with respect to the rotational direction of the sleeve provides a magnetic force F (Gauss). The elastic plate is contacted to the sleeve with the pressure P (g/cm). In this structure, 0.71P+385.ltoreq.F.ltoreq.-1.43P+1630 is satisfied.

REFERENCES:
patent: 4406535 (1983-09-01), Sakamoto et al.
patent: 4458627 (1984-07-01), Hosono et al.
patent: 4511239 (1985-04-01), Kanbe et al.
patent: 4674439 (1987-06-01), Sakamoto et al.
patent: 4814818 (1989-03-01), Fuma et al.

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