Apparatus for microfilm re-enlargement

Details Apparatus for microfilm re-enlargement Apparatus for microfilm re-enlargement

1975-09-24

1977-08-09

Hix, L. T.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

96 1C, 361225, G03G 1502

Patent

active

040407357

ABSTRACT:
Apparatus for producing positive enlarged copies from positive or negative microfilm, in which the photoconductive element can be charged either negatively or positively so that one developing liquid containing particles of only one polarity can be used to create positive copies regardless of whether the original microfilm is positive or negative. The apparatus includes a reusable photoconductive web having an aluminum backing, a perforated development electrode, and a transfer station for transferring the developed image to paper.

REFERENCES:
patent: RE28568 (1975-10-01), Saito et al.
patent: 2890968 (1959-06-01), Giaimo
patent: 3049968 (1962-08-01), Johanson
patent: 3788844 (1974-01-01), Sato et al.

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