Radiant energy – Irradiation of objects or material – Irradiation of semiconductor devices
Patent
1979-08-27
1982-03-02
Anderson, Bruce C.
Radiant energy
Irradiation of objects or material
Irradiation of semiconductor devices
355 3SC, G03G 13052
Patent
active
043180027
ABSTRACT:
The invention basically comprises systems and methods relating to the field of electrostatics and is concerned with multicolor electrostatic reproduction, printing or constituting on coated and uncoated print receiving media with multilayer apertured elements or screens carrying charge distributions in accordance with selected color separation patterns. Ions accelerated through the apertures of the multilayer element pass therethrough under modulation control dictated by the color separation pattern, thereby forming a modulated ion stream having a cross-sectional density pattern corresponding to the color separation pattern. Electrostatic latent images are formed with modulated ion streams and are developed in various ways. In one embodiment, a modulated ion stream is accelerated by an electrostatic field through a mist of uncharged liquid toner particles which are charged by collision with the ions and then accelerated by the ion accelerated field toward and onto the print receiving medium, which may be ordinary uncoated paper. In another embodiment, the modulated ion pattern is projected onto a dielectric surface in the electrostatic accelerating field to form an undeveloped latent electrostatic color separation image thereupon. The dielectric surface may be a dielectric coating on the print receiving medium itself. In another embodiment, the dielectric surface may be formed on an intermediate transfer drum and the print receiving medium laid over the image on the drum and the image transferred and fixed to the print receiving medium with heat and pressure.
REFERENCES:
patent: 3694200 (1972-09-01), Pressman
patent: 3809556 (1974-05-01), Pressman et al.
patent: 4014694 (1977-03-01), Crane et al.
Gardiner Kenneth W.
Pressman Gerald L.
Anderson Bruce C.
Electroprint, Inc.
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