Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1988-08-23
1990-03-27
Martin, Roland E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
4301066, 430110, 430122, 430903, G03G 1309
Patent
active
049120034
ABSTRACT:
A reverse development method comprising the steps of forming electrostatic image on the surface of an image-bearing member; supplying a developer comprising chargeable magnetic toner based on magnetic powder and a resin development roll comprising a conductive core, a permanent magnet arranged around the conductive core and a dielectric layer provided around and fixed to the permanent magnet and having conductive particles mutually insulated from each other; conveying the developer onto a surface of the image-bearing member by rotation of the developement roll so that the magnetic toner is attracted to the uncharged portions of the image; characterized in that the chargeable magnetic toner contains an aliphatic acid metal salt and is coated with hydrophobic silica.
REFERENCES:
patent: 4288515 (1981-09-01), Yamashita et al.
patent: 4357406 (1982-11-01), Kouchi et al.
patent: 4376813 (1983-03-01), Yuge et al.
patent: 4401741 (1983-08-01), Miyakawa et al.
patent: 4436802 (1984-03-01), Ohtsuka et al.
Asanae Masumi
Kimura Fumio
Hitachi Metals Ltd.
Martin Roland E.
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