Photocopying – Projection printing and copying cameras – With focusing or projection screen
Patent
1992-06-25
1994-01-11
Hayes, Monroe H.
Photocopying
Projection printing and copying cameras
With focusing or projection screen
355 40, 355 43, G03B 1328
Patent
active
052786099
ABSTRACT:
A microfilm reader capable of printing out a printed image having the extension same as that of the original image recorded in the microfilm at a reduced size without the need of any instruction from the operator or other means. The microfilm used in the microfilm reader has a mark as an internal standard scale which is photographed on a marginal portion of each frame of the microfilm. The length of the scale mark is read and determined to know magnification ratio necessary for printing out a copy image having the same as the corresponding original, and the magnification ratio is varied by a zoom lens of optical system or an electronic processor for processing image signals. In a modified embodiment, a microfilm having an information mark (i.g., a bar code, numerals, characters or format) indicating the dimensions of the original or reducing ratio at the original image photographing step. Information shown by the information mark is sensed to know the magnification ratio necessary for printing out a copy image having the same as the corresponding original.
REFERENCES:
patent: 4607950 (1986-08-01), Ishii et al.
patent: 4687321 (1987-08-01), Itoh
patent: 4693591 (1987-09-01), Saijo et al.
Fuji Photo Film Co. , Ltd.
Hayes Monroe H.
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