Dry process production of archival microform records from hard c

Details Dry process production of archival microform records from hard c Dry process production of archival microform records from hard c

1974-04-08

1976-06-29

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 64, 355 99, G03B 2700, G03B 2702, G03B 2732

Patent

active

039663175

ABSTRACT:
A dry-process method and apparatus for producing archival microform records from light reflecting hard copy utilize a dry-process mask film strip which is photosensitive to and microimaged by light reflected and reduced or condensed from the hard copy and developed by heat to provide microimaged transparencies therein as the mask film strip is moved to an imaging and developing station. It also utilizes a dry-process microform film which has archival properties and which is sensitive to and microimaged and developed by short pulses of electromagnetic energy above a threshold value applied thereto through the microimaged transparencies of the superimposed mask film strip when it is moved to an image transferring station to provide in the microform film imaged microform records which conform to the transparent microimages in the dry-process mask film strip and, hence, the hard copy and which have achival properties. The microform film is preferably in the form of a microfiche.

REFERENCES:
patent: 2855834 (1958-10-01), Doster
patent: 3051044 (1962-08-01), McNaney
patent: 3155022 (1964-11-01), Schwertz
patent: 3207051 (1965-09-01), Cooper
patent: 3570380 (1971-03-01), Kamenstein
patent: 3778151 (1973-12-01), Zimmet

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