FASTENING LACE WITH TUBULAR BODY Russian patent published in 2018 - IPC D04C1/12 

FIELD: instrument engineering.

SUBSTANCE: laces with projections in accordance with the current level of technology, always have a core of elastic rubber, but they differ in the state of expansion and contraction of the rubber sections corresponding to the two end sections and the central section of the protrusion. In other words, even with the same elastic core section, which substantially expands and contracts, coexists with a site that does not expand and contract at all, and in the region of the boundary between them, a strong tension accumulates, and when the tension reaches the limit, it eventually breaks. Difficulty with this technology is that the action, the result of which is accumulated tension in a relatively weak material, such as rubber, is a natural action. Proposed fastening lace containing tubular body of the lace, made of elastic material having protrusions, spaced apart, and the protrusions change the diameter in accordance with the magnitude of the tension applied to them in the axial direction, moreover, the central portion of the tube consists of the tubular structure of the body of the cord, the portions corresponding to the central portion of the projections have a spherical shape.

EFFECT: as a result, tension is accumulated in a relatively weak material, such as rubber.

4 cl, 11 dwg