Coating apparatus – With means to apply electrical and/or radiant energy to work... – With electromagnetic and/or electrostatic removal of...
Patent
1996-04-15
1999-05-18
Beatty, Robert
Coating apparatus
With means to apply electrical and/or radiant energy to work...
With electromagnetic and/or electrostatic removal of...
355251, G03G15/09
Patent
active
059047771
ABSTRACT:
The present invention provides a development apparatus which can operate free from development ghost or bias leak, can form a good image free of defects such as development ghost even if the foregoing negative-working magnetic one-component developer is used and can exhibit an excellent environmental stability of image density even under high temperature and humidity conditions. The magnetic one-component development apparatus according to the present invention comprises a developer carrier provided opposed to an electrostatic latent image retainer. The surface the developer carrier comprises an electrically-conductive resin layer containing as a particulate electrically-conductive material a carbon black and a graphite. The ash content in the graphite is not more than 3.0% by weight. The volume intrinsic resistivity of the electrically-conductive resin layer preferably falls within a range of from 2.0.times.10.sup.-2 to 0.99 .OMEGA..multidot.cm. As the developer to be supported on the developer carrier there may be used a negatively-chargeable magnetic one-component developer.
REFERENCES:
patent: 3814054 (1974-06-01), Tajihi
patent: 4894305 (1990-01-01), Hagenbach
Nakatogawa Kenji
Ohta Shigeo
Beatty Robert
Fuji 'Xerox Co., Ltd.
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