Recording system

Details Recording system Recording system

1978-08-04

1979-09-04

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

118653, 355 3TR, 355 3DD, G03G 1500

Patent

active

041666917

ABSTRACT:
An electrostatic latent image is formed on a photoconductive or dielectric image carrier by a technique in which the image carrier is charged and exposed utilizing the photoconductivity, or by a technique in which the surface of the image carrier is directly and selectively charged with a stylus or a pin tube. The latent image is either directly developed or subjected to reversal development to form a positive or a negative visual image on the carrier. The direct development or reversal development may utilize one of dual toners which are charged to opposite polarities in a selective manner, or may employ a single component powder toner which is forcedly charged to a given polarity. the positive or negative visual image is electrostatically transferred onto a record sheet. The polarity of the voltage utilized during the transfer is switched depending on the polarity to which the toner which forms the visual image to be transferred is charged.

REFERENCES:
patent: 3117884 (1964-01-01), Greig
patent: 3999849 (1976-12-01), Maksymiak et al.

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