Coating apparatus – With means to apply electrical and/or radiant energy to work... – With electromagnetic and/or electrostatic removal of...
Patent
1995-06-09
1996-08-13
Pendegrass, Joan H.
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
055458408
ABSTRACT:
A developing device in an electrophotographic apparatus, wherein a pole c.sub.1 which is a delivering magnetic pole of the second developing roll for delivering the developer to the first developing roll and a pole d.sub.1 which is a receiving magnetic pole of the second developing roll for receiving the developer from the first developing roll are set so as to be the same in polarity, whereas a pole a.sub.2 which is a receiving magnetic pole of the first developing roll for receiving the developer from the second developing roll and a pole g.sub.2 which is a delivering magnetic pole of the first developing roll for delivering the developer to the second developing roll are set to be equal in polarity, wherein each of an angle between the poles c.sub.1 and d.sub.1 and an angle between the poles a.sub.2 and g.sub.2 is set so as to be in a range of from 70.degree. to 120.degree., and wherein the magnetic flux density of each of a reaction pole induced between the poles c.sub.1 and d.sub.1 and a reaction pole induced between the poles a.sub.2 and g.sub.2 is set so as to be less than or equal to 0.015 tesla.
REFERENCES:
patent: 4177757 (1979-12-01), Murakawa et al.
patent: 4436055 (1984-03-01), Yamashita et al.
Doi Koji
Hirose Youji
Iwanaga Hidenori
Takahashi Kunitomo
Takeuchi Youichi
Chen Sophia S.
Hitachi Koki Co,. Ltd.
Pendegrass Joan H.
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