Method of manufacturing tire tubes, and tire tube
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 20, 2004
Grant Date -
N/A
app pub date -
Aug 22, 2000
filing date -
Mar 5, 1998
priority date (Note) -
Expired
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Abstract
The tube material 2' extrusion-molded by the extrusion molding machine has an air chamber peripheral wall 3i, a sealant chamber peripheral wall 3o and a partition wall 4. An air chamber 5 is defined between the air chamber peripheral wall 3i and the partition wall 4, and a sealant chamber 6 is defined between the sealant chamber peripheral wall 3o and the partition wall 4. On the air chamber peripheral wall 3i are protrusively formed a plurality of rib-shaped projections 15 each forming a thick portion for reinforcement. The thickness t.sub.3 of each of the projections is approximately equal to the thickness t.sub.1 of the peripheral wall 3 and the thickness t.sub.2 of the partition wall 4. It is possible to efficiently extrusion-mold the tube material 2' having the thick portions for reinforcement by thus approximately equalizing the thickness of each part of the tube material 2 including the rib-shaped projections 15.
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