Electrophotographic liquid developer and image forming apparatus

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...

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430117, 399237, 399308, G03G 913

Patent

active

061468045

ABSTRACT:
(1) Electrophotographic liquid developer comprising electrically insulating medium liquid and toner dispersed in the medium liquid, wherein the toner has a melt viscosity (.eta.) in a range from 2.times.10.sup.2 poises to 1.times.10.sup.5 poises at 100.degree. C. in a dry state, and has a glass transition temperature of 20.degree. C. or more.
(2) Electrophotographic liquid developer comprising electrically insulating medium liquid and toner dispersed in the medium liquid, wherein the toner contains binder resin exhibiting at least one peak in each of ranges of a molecular weight lower than 5000 and of a molecular weight of 5000 or more when detected by a gel permeation chromatography (GPC).
(3) An image forming apparatus comprising an electrostatic latent image carrier for forming an electrostatic latent image; a liquid developing device developing the electrostatic latent image formed on the electrostatic latent image carrier into a visible toner image with liquid developer; an intermediate transfer member carrying the toner image transferred thereto from the electrostatic latent image carrier for further transferring the transferred toner image to a record member; and a heating device for heating the intermediate transfer member, wherein the liquid developing device develops the electrostatic latent image with the liquid developer of the above (1) or (2).

REFERENCES:
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patent: 4882258 (1989-11-01), Ikeuchi et al.
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patent: 5407771 (1995-04-01), Landa et al.
patent: 5759733 (1998-06-01), Tsubuko et al.
patent: 5800954 (1998-09-01), Kato et al.
Chemical Abstracts 120:311460 1993.

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