Multi-copy ion-valve radiography

Details Multi-copy ion-valve radiography Multi-copy ion-valve radiography

1978-09-15

1980-08-19

Smith, Alfred E.

Radiant energy

Source with charged plate-type detector

G03G 1500

Patent

active

042186196

ABSTRACT:
A method and apparatus for ion-valve radiography allowing a multiplicity of copies to be made responsive to a single radiographic exposure. Radiation, differentially-absorbed by passage through an object to be studied, enters an exposure chamber having a foraminate film or mesh structure surrounded by a high pressure gas or radio-conductive liquid of a type which converts the impingent radiation into electrostatic charge. The chamber is bounded by a pair of electrodes establishing electric fields therein to cause a charge image of the object to form upon an insulating layer contained upon the mesh structure. After exposure, the charge-image-bearing member is moved to a printing chamber and a charge image is deposited upon an insulative material sheet by ion flow techniques, for subsequent development by xerographic techniques.

REFERENCES:
patent: 3961192 (1976-06-01), Ando
patent: 3975626 (1976-08-01), Van Engeland et al.

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