Non-electrostatic printing method employing an insulating image

Details Non-electrostatic printing method employing an insulating image Non-electrostatic printing method employing an insulating image

1974-01-09

1976-05-11

Husack, Ralph

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

96 14, 427 12, 427 14, G03G 1700

Patent

active

039565238

ABSTRACT:
Method for producing electrographic images from an original provided with a conductivity pattern ranging from a portion having a greater conductivity to a portion having a lesser conductivity, said conductivity pattern being affixed to an insulating backing material, comprising the steps of coating said conductivity pattern with a thin layer of electrically chargeable particles, disposing an insulating layer against said conductivity pattern, so that said layer of electrically chargeable particles is located between said conductivity pattern and said insulating layer, generating an electric field of sufficient strength across said insulating layer, said layer of electrically chargeable particles, said conductivity pattern and said insulating backing so as to transfer electric charges from said conductivity pattern to said electrically chargeable particles whereby a portion of said particles are sufficiently charged and removed from said conductivity pattern and the remainder of said particles are insufficiently charged to be removed thereby producing a stable electrographic image. An insulating image carrier may be used onto which said removed portion of the particles may form a second stable electrographic image.

REFERENCES:
patent: 3721551 (1973-03-01), Cantarano
patent: 3741761 (1973-06-01), Cantarano
patent: 3776722 (1973-12-01), Cantarano
patent: 3826672 (1974-07-01), Cantarano

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