Developing device

Details Developing device Developing device

1980-02-26

1982-07-27

Pianalto, Bernard D.

Coating apparatus

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

With electromagnetic and/or electrostatic removal of...

118657, G03G 1509

Patent

active

043411797

ABSTRACT:
The present invention provides a developing device for conducting image development with the use of a magnetic developer containing magnetic powder in a proportion not less than 20 wt. % and having a mean particle size not less than 5 microns and with a magnetic field of which flux density is not in excess of 950 gauss at the surface of the developer supporting member. Also the developing device is provided with developer leak preventing members, a developer recovering magnetic pole at an angular position .theta.1 (<45.degree.) downstream of the initial contact position of the preventing members with the developer supporting member and another magnetic pole at angular position .theta.2 (<.theta.1) upstream of the initial contact position.

REFERENCES:
patent: 4254202 (1981-03-01), Matsumoto

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