Developer for electrostatic photography and image forming method

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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430112, 430115, G03G 9125

Patent

active

057833508

ABSTRACT:
The developer for electrostatic photography according to the present invention comprises toner particles containing a thermoplastic resin and a colorant dispersed in an electrically insulating carrier having a melting point above room temperature wherein the thermoplastic resin is insoluble in the electrically insulating carrier at a temperature below the melting point of the electrically insulating carrier but becomes solvated with the electrically insulating carrier at a temperature above the melting point of the electrically insulating carrier. The present invention provides a developer for electrostatic photography, which enables to reduce the emission of vapor, to carry out a fixing treatment at a higher rate, to reduce the amount of energy required for fixing treatment and to create a high-quality image even after repeated use of the developer.

REFERENCES:
patent: 3079272 (1963-02-01), Greig
patent: 3247007 (1966-04-01), Oliphant
patent: 3264272 (1966-08-01), Rees
patent: 4794651 (1988-12-01), Landa et al.
patent: 5229235 (1993-07-01), Watanabe et al.
patent: 5622804 (1997-04-01), Matsuoka et al.
Journal of Scientific Instruments, vol. 32, Feb. 1955, "Laboratory and Workshop Notes", K.A. Metcalfe, pp. 74-75.
Journal of Scientific Instruments, vol. 33, May 1956, "Fine grain development in xerography", K.A. Metcalfe, et al., pp. 194-195.

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