Rolled microfilm printing system and method

Details Rolled microfilm printing system and method Rolled microfilm printing system and method

1988-04-08

1990-01-30

Hix, L. T.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

355 45, 355 64, G03B 2770, G03B 2754

Patent

active

048976873

ABSTRACT:
A roll microfilm printer and method includes preview optics sequentially to scan microfilm images for temporarily recording at least edge location and background density data and printing optics sequentially to print the microfilm images onto plain paper with masking and exposure control based upon the prerecorded data from the preview optics. The preview optics include a sensor board having an array of photo diode sensors to receive a light beam that sequentially passes through microfilm images contained on the moving microfilm strip, the optically sensed data from the images is electronically converted and temporarily recorded for use in subsequently controlling the printing optics. The printing optics includes a high speed mask assembly positioned adjacent the moving microfilm strip, the mask assembly having two high speed stepper motors controlled in accordance with the prerecorded data to drive edge masks toward or away from one another to mask unused image areas.

REFERENCES:
patent: 3765758 (1973-10-01), Jackson et al.
patent: 4116560 (1978-09-01), Dragani et al.
patent: 4213696 (1982-07-01), Wise
patent: 4739368 (1988-04-01), Lachut et al.
patent: 4745489 (1988-05-01), Kashiwagi et al.
patent: 4750021 (1988-06-01), Holroyd et al.

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