Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1981-12-03
1984-02-21
Kittle, John E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
4301066, 430109, G03G 1309
Patent
active
044330421
ABSTRACT:
Electrophotographic copying is carried out by electrostatically forming a latent image on a recording medium, supplying a magnetic toner of single component system containing at least a resin and fine particles of forromagnetic material on a non-magnetic sleeve provided with a permanent magnet roller having a plurality of magnetic poles therein, transporting the magnetic toner into a gap between the recording medium and the non-magnetic sleeve, attaching the magnetic toner to the recording medium, thereby developing the latent image into a visible image, electrostatically transferring the toner image thus formed on the recording medium onto a transfer sheet, and fixing the transferred image, thereby obtaining a final image, wherein the magnetic toner has a resistivity of more than 5.times.10.sup.15 .OMEGA.cm and a relative dielectric constant of less than 3.0.
Good development and good transferred image are obtained even with a recording medium having a low relative dielectric constant and a high insulating property, and practically high transfer efficiency can be obtained with the ordinary sheet having a low resistivity as a transfer sheet.
REFERENCES:
patent: 4210448 (1980-07-01), Fargo
patent: 4218530 (1980-08-01), Lu
patent: 4239845 (1980-12-01), Tanaka et al.
patent: 4245024 (1981-01-01), Yamashita et al.
patent: 4265993 (1981-05-01), Kawanishi et al.
Hoshi Nobuyoshi
Kawanishi Tsuneaki
Morishita Hirosada
Mukoh Akio
Goodrow John L.
Hitachi Metals Ltd.
Kittle John E.
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