Apparatus for microfilm re-enlargement

摘要

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.