Direct electrostatic printing apparatus and toner/developer deli

Details Direct electrostatic printing apparatus and toner/developer deli Direct electrostatic printing apparatus and toner/developer deli

1986-12-29

1988-05-10

Evans, A.

Recorders

Electric recording

Electrochemical

3461601, G01D 1510

Patent

active

047439262

ABSTRACT:
Electrostatic printing apparatus including structure for delivering developer or toner particles to a printhead forming an integral part of the printing device. Alternatively, the toner particles can be delivered to a charge retentive surface containing latent images. The developer or toner delivery system is adapted to deliver toner containing a minimum quantity of wrong sign and size toner. To this end, the developer delivery system includes a pair of charged toner conveyors which are supported in face-to-face relation. A bias voltage is applied across the two conveyors to cause toner of one charge polarity to be attracted to one of the conveyors while toner of the opposite is attracted to the other conveyor.
In another embodiment, a single charged toner conveyor is supplied by a pair of three-phase generators which are biased by a dc source which causes toner of one polarity to travel in one direction on the electrode array while toner of the opposite polarity travels generally in the opposite direction.
In additional embodiments of the invention, a toner charging device is provided which charges uncharged toner particles to a level sufficient for movement by one or the other of the aforementioned charged toner conveyors.

REFERENCES:
patent: 3689935 (1972-09-01), Pressman et al.
patent: 3778678 (1973-12-01), Masuda
patent: 3801869 (1974-04-01), Masuda
patent: 3872361 (1975-03-01), Masuda
patent: 4480911 (1984-11-01), Itaya et al.
patent: 4491855 (1985-01-01), Fujii et al.
patent: 4538163 (1985-08-01), Sheridon
patent: 4568955 (1986-02-01), Hosoya et al.

Affiliated with

Also associated with

Rating

Direct electrostatic printing apparatus and toner/developer deli does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Direct electrostatic printing apparatus and toner/developer deli, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct electrostatic printing apparatus and toner/developer deli will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1324162