Direct electrostatic printing device which uses a gas stream to

Details Direct electrostatic printing device which uses a gas stream to Direct electrostatic printing device which uses a gas stream to

1996-09-12

1999-11-16

Fuller, Benjamin R.

Drying and gas or vapor contact with solids

B41J 206

Patent

active

059844434

ABSTRACT:
A DEP device is provided that comprises a back electrode (105), a printhead structure (106), an array of printing apertures (107) in the printhead structure (106) through which a particle flow can be electrically modulated by a control electrode (106a), a toner delivery means (101), presenting a cloud (100) of dry toner particles in the vicinity of the apertures (107), characterized in that the toner cloud (100) is formed in the vicinity of the apertures (107) by means of a gas stream. The toner cloud is formed by detaching toner particles from a charged toner conveyer by the gas stream, or by forming a fluidized bed of toner particles.

REFERENCES:
patent: 4117778 (1978-10-01), Watanabe et al.
patent: 4154195 (1979-05-01), Mugrauer
patent: 4777106 (1988-10-01), Fotland et al.
Patent Abstracts of Japan, vol. 018, No. 405 (P-1778), Jul. 28, 1994 and JP-A-06 118740 (Fuji Xerox Co., Ltd.), Apr. 28, 1994.

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