Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1995-02-17
1996-01-16
Rodee, Christopher D.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430100, G03G 1309
Patent
active
054846803
ABSTRACT:
The developing method of the present invention is carried out by providing a developing means comprising a non-magnetic sleeve and a permanent magnet member stationary inside the non-magnetic sleeve at a position opposing an image-bearing member having an electrostatic latent image on the surface, thereby forming a developing region; causing a developer to be magnetically attracted onto a surface of the non-magnetic sleeve, the developer comprising magnetic toner consisting of a binder resin and magnetic powder and capable of being charged at a particular polarity and a magnetic carrier having a relatively large conductivity; and rotating the non-magnetic sleeve to convey the developer to the developing region, thereby developing the electrostatic latent image with the magnetic toner. The non-magnetic sleeve is rotated in the same direction as the image-bearing member in the developing region at a ratio of a surface moving velocity (V.sub.1) of the non-magnetic sleeve to a surface moving velocity (V.sub.2) of the image-bearing member (V.sub.1 /V.sub.2)=1.5-5.0. A center of a developing magnetic pole of the permanent magnet member is deviated by 2.degree.-12.degree. toward the downstream side from a line connecting the closest points of the non-magnetic sleeve and the image-bearing member.
REFERENCES:
patent: 4517274 (1985-05-01), Honda et al.
patent: 4640880 (1987-02-01), Kawanishi et al.
patent: 4841332 (1989-06-01), Haneda et al.
patent: 5049471 (1991-09-01), Higashiguchi et al.
patent: 5060023 (1991-10-01), Higashiguchi et al.
Goto Ryuji
Noguchi Koji
Hitachi Metals Ltd.
Rodee Christopher D.
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