Apparatus for transporting or positioning of a strip-shaped ligh

Details Apparatus for transporting or positioning of a strip-shaped ligh Apparatus for transporting or positioning of a strip-shaped ligh

1982-08-27

1984-03-13

Adams, Russell E.

354222, 35428912, G03B 1702

Patent

active

044363990

ABSTRACT:
A roll film (25) is guided behind a fixed light-path opening (22) in a housing 20 which limits the largest format of the pictures producible with the housing. Opposite areas of the light-path opening (22) may be covered up by two adjustable mask parts (51, 52) in order to change the picture window left open between the mask parts. Operating elements for the selection of the format of the picture window and its position within the light-path opening (22) are coupled with electro-mechanical transducers for producing electrical theoretical value signals. Electro-mechanical transducers (93, 94) for producing electrical actual-value signals are associated with the mask parts (51, 52). A reversible film travel apparatus (65-78) is connected with an electro-mechanical transducer (95) for producing electrical signals. All signals mentioned are fed to an electronic logical circuit module (130). A corrective film travel is controlled via signal outlets of the logical circuit module (130) for changing of the picture window, which with regard to direction and extent corresponds with the position change of that mask part (52) needed to change the picture window, which mask part (52) defines the second transverse edge of the picture window when viewed in the forward travel direction of the film (25). As a result, overlapping of successive latent pictures on film (25) as well as unused areas between these pictures will be prevented, even if the picture window is changed from one picture to another.

REFERENCES:
patent: 4180314 (1979-12-01), Koch et al.

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