Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – To produce color reproduction
Patent
1998-09-17
2000-11-28
Chapman, Mark
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
To produce color reproduction
430110, 430111, G03G 1301
Patent
active
061533432
ABSTRACT:
A method of forming a toner image on an image transfer sheet include the steps of forming a latent electrostatic image on an image bearing member, developing the latent electrostatic image to a toner image, using a developer, and transferring the toner image to an image transfer sheet, with the developer having a carrier and a toner which contains a thermoplastic resin and a coloring agent having a chromatic color and capable of retaining the chromatic color even after the toner is sintered, and satisfying at least one of three conditions that (1) a toner concentration in the developer is in a range of 8 to 24 wt. %, (2) the toner has an absolute charge quantity value of 12 .mu.C/g or less, and (3) a ratio of a true specific gravity of the carrier to that of the toner is in a range of 2 to 3. An image can be fixed on a heat-resistant solid surface by further attaching the toner image transferred to the image transfer sheet to a heat-resistant solid surface and sintering the toner image. Further, a developer and a toner image bearing transfer sheet are also disclosed.
REFERENCES:
patent: 4963454 (1990-10-01), Yano et al.
patent: 4990427 (1991-02-01), Kohri et al.
Kawase Hiromitsu
Matsuda Masaru
Chapman Mark
Ricoh & Company, Ltd.
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