Photographic printer and method for detecting and positioning fr

Details Photographic printer and method for detecting and positioning fr Photographic printer and method for detecting and positioning fr

1985-10-23

1988-02-23

Hix, L. T.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

355 68, 250557, 250561, 250571, G03B 2752

Patent

active

047273992

ABSTRACT:
A photographic printer according to the present invention can automatically print films of an arbitrary size by directly and automatically detecting image data of a film negative to discriminate whether the firm negative is of a full or half size, and switches the conveying direction of the film based upon the result of the above discrimination, and adjusts the aperture of the mask at a printing unit. The method according to the present invention can detect and position frames at a high speed and high accuracy and yet with a simple structure which includes the steps of detecting image data of an original film, and determining a feeding length with the size data and edge detection of the original film and positioning imaged frames.

REFERENCES:
patent: 3469105 (1969-09-01), Stasey
patent: 4176944 (1979-12-01), Payrhammer
patent: 4611907 (1986-09-01), Inatsuki

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