Photocopying – Including fiber optics
Patent
1973-05-14
1976-03-16
Moses, Richard L.
Photocopying
Including fiber optics
355 14, G03G 1500
Patent
active
039443574
ABSTRACT:
Apparatus for producing microfilm which, in its preferred form, comprises xerographic reproduction apparatus responsive to printed document reflectable radiation produces on an endless image projection member a removable image opaque to a given radiant energy. Radiant energy is momentarily projected through the member and a high reduction lens system upon a grainless photosensitive microform material. The photosensitive microform material most advantageously comprises an etch-resistant transparent substrate having a film of an etchable metal or metallike image-forming material, in turn, having a film of a photosensitive material which becomes chemically transformed by exposure to said radiant energy to form or leave on the exposed or unexposed areas thereof a material removable or permeable by an etchant which removes the image-forming layer therebeneath, and on the other of same a material which is not removed or permeable by the etchant. The etching process, which need take only less than one second, may be followed by an instant wash and hot air blast, to provide a dry microfilm having unusually high acuity, contrast and resolution, and excellent archival properties.
REFERENCES:
patent: 3051044 (1962-08-01), McNaney
patent: 3083623 (1963-04-01), Mott
patent: 3168857 (1965-02-01), Hutto
patent: 3504969 (1970-04-01), Martel
Energy Conversion Devices Inc.
Moses Richard L.
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