Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1982-02-16
1984-06-26
Moses, Richard L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 4, 355 77, 118645, 430117, G03G 1510
Patent
active
044563671
ABSTRACT:
A method and apparatus is provided for toning a latent electrostatic image on an exposed photoconductive surface of an electrophotographic member, using liquid toner comprising toner particles suspended in an electrically insulating liquid dispersant. Plural, generally identical, toner modules are arranged side by side at a first level, each module comprising a toner tray having a development electrode mounted on the upper surface thereof. The development electrode has a planar upper surface. A motor operates an articulated linkage which causes the tray to be elevated to a second level for toning, one of the modules being selected from the others. Antifriction bearing surfaces are mounted on the upper surface of the tray at opposite ends of the development electrode. The antifriction surfaces extend upwardly of the development electrode a short distance slightly above the upper surface thereof to define a gap between the development electrode and the surface to be toned. A toggle actuated control valve can be provided to direct the toner flow over the electrode in the direction of the movement of said surface, changing the direction of flow during the reciprocal movement of said surface. Alternatively, the flow of toner may be continuous over the planar electrode. During toning, a bias voltage is applied between the development electrode and the photoconductive surface to establish an electrical field within the gap for assisting toning. The charge level to which the toner responds is above the residual level thereby leaving the nonimaged or background area of the photoconductive surface free of toner particles.
REFERENCES:
patent: 4176940 (1979-12-01), Katakabe et al.
patent: 4247191 (1981-01-01), Grace et al.
patent: 4262998 (1981-04-01), Kuehnle et al.
patent: 4294192 (1981-10-01), Nakai et al.
Fraser Kenneth D.
Kuehnle Manfred R.
Szymanski Michael J.
Weber Harold J.
Coulter Systems Corporation
Moses Richard L.
LandOfFree
Toning system for electrostatic imaging apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Toning system for electrostatic imaging apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Toning system for electrostatic imaging apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2230303