Inner tube
AssigneeSigma-Tau Industrie Farmaceutiche Riunite S.p.A.
InventorAdolf Andreas Jetten
Life of this patent
Estimating the term…
Abstract
The invention relates to a tyre (1) for mounting on a running wheel, a rim or a guide which is circular, oval, ellipsoid or rounded in some other way and is not continuous but rather has at least two ends. The invention also relates to a method for manufacturing a corresponding tyre (1).
Claims9
A wheel inner tube (1) for complete mounting on a wheel, a rim or a guide which is circular, oval, ellipsoid or rounded in some other way, which is not continuous but rather has at least two ends;
- wherein the end caps (2) of the tube (1) each have a rounded bulge, characterized in that said end caps (2) are connected edge to edge by an integral joint by vulcanization with the tube (1) each through a joined tube section (3).
A method for preparing an open wheel inner tube (1) with closed ends, characterized in that
- an end cap having a rounded bulge (2) is joined edge to edge to a non-vulcanized or partially vulcanized tube section (3), which is present on a mandrel with a corresponding bulge, in an injection mold in a first step;
- the end cap and the tube section (3) are partially vulcanized in a second step;
- the mandrel is withdrawn and the tube section (3) with the end cap (2) is removed from the vulcanization mold in a third step;
- the tube section (3) is joined edge to edge to the non-vulcanized or partially vulcanized wheel inner tube (1) in a fourth step;
- and
- the wheel inner tube (1), the tube section (3) and the end cap (2) are finally vulcanized in a fifth step;
- the same procedure being applied to the second end cap.
A method for preparing an open wheel inner tube (1) with closed ends is characterized in that
- an rounded end piece having a rounded bulge (2,3) is prepared from a tube section (3) and an end cap (2) in a corresponding injection mold in a first step;
- the end piece (2,3) is joined edge to edge to the non-vulcanized or partially vulcanized wheel inner tube (1) in a second step;
- and
- the wheel inner tube (1) and the end piece are vulcanized in a third step;
- the same procedure being applied to the second end piece (2,3).
Dependencies are inferred from the claim text.