Method of positioning image frame and photographic film carrier

Photocopying – Projection printing and copying cameras – Identifying – composing – or selecting

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355 75, G03B 2752

Patent

active

055551815

ABSTRACT:
A method is provided for positioning an image frame recorded on a photographic film at a predetermined position for printing process. In the method, an image frame edge is detected depending on a quantity of transmitted light passing through the photographic film during carrying. If there is a faulty image frame having an undetectable frame edge, a film carrying amount is determined depending on a recording tendency of normal image frames preceding the faulty image frame. Therefore, it is possible to compensate, for example, a feed pitch error by a camera, and to position the image frame accurately. Further, it can be established whether the image frame is a standard size image frame or a panoramic size image frame depending on the quantity of transmitted light. Thus, the printing process can be consecutively performed by positioning only one of the two type image frames so that an operation efficiency can be improved.

REFERENCES:
patent: 3627411 (1971-10-01), Nagel
patent: 3699349 (1972-10-01), Paulus et al.
patent: 3721495 (1973-03-01), Tanaka
patent: 4167678 (1979-09-01), Mischo et al.
patent: 4727399 (1988-02-01), Matsumoto
(English Abstract for 3-11329) Patent Abstracts of Japan (translated), Kokai No. 3-11329, published Jan. 18, 1991.
(English Abstract for 52-2429) Patent Abstracts of Japan (translated), Kokai No. 52-2429, published Jan. 10, 1977.
(English Abstract for 54-103032) Patent Abstracts of Japan (translated), Kokai No. 54-103032, published Aug. 14, 1979.
(English Abstract for 53-134422) Patent Abstracts of Japan (translated), Kokai No. 53-134422, published Nov. 24, 1978.
European Search Report, Feb. 16, 1993.

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