SU20943A1 - Paper reel - Google Patents

Description

A coil made of paper is made up of two tubes inserted one from the other and supplied with paper washers held onto the tubes by their ends bent in the form of cuffs.

In FIG. 1 depicts one half of a paper reel; FIG. 2 shows the other half of the coil inserted with its cylindrical part into the corresponding part in FIG. one; FIG. 3 - half of the coil when starting to push one half into the other; FIG. 4 - the same, in a closed form.

i To replace the wood, the thread spool is made of paper and consists of two parts, each of which has a paper washer fitted onto the end of the paper tube. These tubes are inserted one into the other, in order to achieve a more tight connection, the tube that is inserted inside the other has a cut along the generatrix so that when inserted inside the tube it can, under the influence of the elasticity of the paper, unfold and pressure on the inner surface of the ambient

tubes increase the friction of one tube against another, preventing them from diverging in the axial direction. To hold the washers 6 at the ends of the tubes, these ends are bent in the form of cuffs d forming thickenings that prevent the washers from moving outwards under the influence of the pressure of the threads wound on the middle cylindrical part of the coil.

The subject of the patent.

1. A paper reel for threads, characterized by the fact that the cylindrical part of it is made of a composite of two paper tubes inserted one into another,

2. The form of execution, in accordance with clause 1, is characterized in that, in order to achieve the density of the joint, the inner tube is cut along the generatrix.

3. Form of execution, according to. 1 and 2, characterized in that, in order to retain the washers, the ends of the tubes are provided with thickening, formed by folding the paper in the form of a cuff.

Well to the patent J.I. Estrin Ks 2094

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