Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1981-05-27
1984-06-12
Welsh, John D.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430119, G03G 912
Patent
active
044542151
ABSTRACT:
This invention relates to a composition for developing latent electrostatic images by liquid development and a method of transferring the developed image to a carrier sheet over a gap. The gap is formed by dielectric spacing particles disseminated through a dielectric carrier liquid, through which toner particles are also disseminated. The toner particles and the spacing particles bear the same surface charge so as to repel each other while in the developing liquid. Apparatus is provided, for use of the novel developing composition, which includes a metering means adapted to remove excess liquid from the surface of a developed image. In order to induce the spacing particles to migrate toward the photoconductor, the metering means is biased to a potential greater than that of the non-image areas. This enables the spacing particles, which have a higher dielectric constant than the carrier liquid, to migrate toward the photoconductor. The toner particles, however, will be attracted to the metering means from the background areas so as to maintain these clear of toner particles. The method contemplates the steps of biasing the metering means with a potential of opposite polarity to the polarity of the toner particles and yet permitting the spacing particles to remain on the photoconductor to perform their spacing function at the gap transfer station.
REFERENCES:
patent: 3820983 (1974-06-01), Fukushima et al.
patent: 3893854 (1975-07-01), Honjo
patent: 3915874 (1975-10-01), Machida
patent: 3949116 (1976-04-01), Lawson et al.
Savin Corporation
Welsh John D.
LandOfFree
Improved composition for developing latent electrostatic images does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Improved composition for developing latent electrostatic images , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Improved composition for developing latent electrostatic images will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-121830