SU125129A1 - Shutter for removable cassettes - Google Patents

Description

This invention relates to removable cassettes attached or inserted into a camera using a shutter. The purpose of the shutter is to open the personnel window of the cassette after installing the last one on the camera and close the personnel window before removing the cassette.

Known devices for these purposes are usually hard metal shutters, which are difficult to use when removing them from the cassette and which do not provide complete opacity.

In the proposed curtain, these shortcomings are eliminated. This is achieved by the fact that the shutter is made of steel tape and plastic tape with corrugations along its edges, interconnected on one of the transverse sides by means of an overlay.

FIG. 1 shows a removable cassette with a curtain inserted against its personnel window; in fig. 2 and 3 are different types of curtains, as shown;

The replaceable cassette / is provided with an inserted shutter 2. The shutter is made of steel tape 3 and plastic tape 4. On the transverse side, both tapes are fastened with a strap 5, and the longitudinal sides are free, since in the replaceable cassette the shutter is tucked into a maze. Plate 6 covers only one steel strip; the second transverse side of the plastic tape retains the freedom of equalization and is reinforced with invoice 7. To obtain a point contact between the film and the plastic tape and to reduce friction between them, the plastic tape is parallel to its longitudinal sides of the projections 8.

Subject invention

The shutter for replaceable cassettes attached to or inserted into cameras, characterized in that, in order to ensure light permeability, is used. the direction of the curtain in the labyrinth of a replaceable cassette, as well as preventing the curtain from external deformations, it is made of steel tape and plastic tape with corrugations along its edges interconnected on one of the polirechny sides by means of a lining.