SU34935A1 - Sleeve for film reel - Google Patents

Description

When charging film cassettes with film, it is not uncommon for the metal ring on which the factory winding film is produced does not correspond to the diameter of the cassette reel, and in order to charge the roller it is necessary to remove a few turns from its middle. ) film. In some cases, however, such an operation is not feasible due to the hard winding of the roller, and then you have to resort to unwanted rewinding of the entire roller onto the reel, the risk of damaging the film with dust, scratches and electrical discharges. In addition, rewound in such a way almost always forms an insufficiently compact and dense roller that follows the film rattling in the cassette, the jamming of the apparatus, and so on.

This invention aims to eliminate the need to rewind a roller, remove, ring and unwind internal turns of a film. This is achieved by using a special sleeve on which the metal ring of the film roller is directly put on, and the sleeve is provided with springs ensuring reliable engagement of the cassette friction unit with the film roller.

In FIG. 1 is a view of the sleeve from the end, and FIG. 2 perspective view of her.

The sleeve is provided with a protruding ring A and internal grooves / for inserting it onto the friction unit. In the ring A several recesses B were made to reinforce in each of them a flat spring B held by screw G.

The springs B, as already mentioned, provide the coupling of the sleeve with the metal ring of the film, while at the same time allowing it to be easily put on the sleeve, i.e., allowing the above described task to quickly and reliably charge the cassette.

The subject matter of the invention.

A sleeve for a film reel, characterized in that, in order to fit the coil onto the sleeve tightly, the latter is provided with several recesses B for strengthening the VIN volume G of the flat spring B. in each of them.