Cylindrical tire forming member manufacturing method and apparatus
AssigneeBridgestone Corporation
InventorsKouji Okuyama, Makoto Yamamoto, Hidetoshi Kimura, Taizo Ito
Life of this patent
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Abstract
In a cylindrical tire forming member building method or apparatus, after the front end portion of a belt-shaped material is pressed against the drum, the belt-shaped material is wound on the drum while being centered, and with the central portion of the rear end portion of the belt-shaped material pressed against the drum with a robot hand, both edge portions of the rear end portion of the belt-shaped material are elongated longitudinally and pressed against the drum with the robot hand, so that the front and rear ends of the belt-shaped material are butt-joined without forming a gap therebetween or without being overlapped.
Claims3
A method for building a cylindrical tire forming member, comprising the steps of:
- conveying a front end portion of a belt-shaped material to a building drum;
- pressing said conveyed front end portion against said drum;
- holding sides of said belt-shaped material during said conveying and pressing steps;
- rotating said drum after said belt-shaped material has been pressed against said drum to thereby wind said belt-shaped material on said drum;
- pressing a widthwise center portion of a rear end portion of said belt-shaped material against said drum after said drum has been rotated;
- longitudinally elongating side portions of said pressed rear end portion of said belt-shaped material;
- pressing said elongated side portions against said drum;
- and
- butt joining said front and rear end portions.
A method for building a cylindrical tire forming member, comprising the steps of:
- conveying a front end portion of a belt-shaped material to a building drum;
- pressing said conveyed front end portion against said drum;
- holding sides of said belt-shaped material during said conveying and pressing steps;
- longitudinally elongating side portions of said pressed front end portion of said belt-shaped material;
- pressing said elongated side portions against said drum;
- rotating said drum after said belt-shaped material has been pressed against said drum to thereby wind said belt-shaped material on said drum;
- centering said belt-shaped material on said drum during said rotation;
- and
- butt joining said front end portion to a rear end portion of said belt-shaped material.
Dependencies are inferred from the claim text.