Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1992-12-31
1994-05-03
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430 47, G03G 1316
Patent
active
053087330
ABSTRACT:
A method is provided for non-electrostatically transferring dry toner particles which comprise a toner binder and have a particle size of 8 micrometers or less from the surface of an element to a receiver. The receiver comprises a substrate having a coating of a semi-crystalline polyester on a surface of the substrate. The semi-crystalline polyester has a glass transition temperature in a range of from approximately 5.degree. C. to 80.degree. C.; a melting temperature in a range of from approximately 40.degree. C. to 200.degree. C.; a weight average molecular weight in a range of from approximately 10,000 to 150,000; a number average molecular weight in a range of from approximately 5,000 to 75,000; a crystallinity of from approximately 5 to 25 percent by weight, based on the total weight of the polyester and a surface energy of from approximately 44 to 52 dynes/cm. The method involves preheating the receiver to a temperature ranging from approximately 70.degree. C. to 95.degree. C. and contacting the toner-bearing element with the receiver to effectuate the transfer of virtually 100% of the toner particles from the element to the receiver and thereafter separating the receiver from the element while the temperature of the semi-crystalline polyester coating on the receiver is maintained above the glass transition temperature of the semi-crystalline polyester.
The method is particularly well suited for providing images having high resolution and low granularity from very small toner particles.
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Research Disclosure dated Dec. 1975, p. 45.
McCabe John M.
Rimai Donald S.
Sorriero Louis J.
Eastman Kodak Company
Kiernan Anne B.
Martin Roland
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