Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – To produce multiple image on medium or plural radiant energy...
Patent
1993-05-20
1995-04-25
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
To produce multiple image on medium or plural radiant energy...
430122, G03G 1309, G03G 1322
Patent
active
054097916
ABSTRACT:
An electrostatic image on an image member already containing a loose dry first toner image is toned with a second toner, for example, a toner of a second and different color from the first toner image. The toning is accomplished by a developer having a high coercivity permanently magnetized carrier and toner which is moved through a development zone by a rapidly rotating core inside a sleeve on which the developer moves. Pole transitions caused by the rapidly moving core make the high coercivity permanently magnetized carrier move vigorously in a wave motion having alternating crests and troughs. Scavenging of the first toner image is prevented by separating the sleeve from the image member sufficiently that the crests of the developer do not touch the image member during the toning process. An alternating electrical field is applied between the sleeve and the image member to enhance development.
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Patent Abstracts of Japan, vol. 13, No. 157 (p-857) (3505) 17 Apr. 1989 JP-A-63 314 568 (Konica) 22 Dec. 1988.
Alexandrovich Peter S.
Jadwin Thomas A.
Kaukeinen Joseph Y.
Stelter Eric C.
Eastman Kodak Company
Martin Roland
Treash Leonard W.
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