| 摘要 |
PCT No. PCT/JP96/03744 Sec. 371 Date Oct. 23, 1997 Sec. 102(e) Date Oct. 23, 1997 PCT Filed Dec. 20, 1996 PCT Pub. No. WO97/23344 PCT Pub. Date Mar. 7, 1997A tube blank 2' whose inside is divided into an air chamber 3 and a sealant chamber 7 by a partition wall 5, is formed by extrusion and cut into a predetermined length. An air valve 6 is mounted to the tube blank 2' to communicate with the air chamber 3 and then, opposite ends of the tube blank is bonded by pressure bonding and vulcanized. A sealant charging bore 41 is formed in the tube blank 2' to communicate with the sealant chamber 7. Thereafter, air is supplied to the air chamber 3 through the air valve 6 to urge the partition wall 5, thereby expelling the air from the sealant chamber 7. In this state, a sealant is supplied into the sealant chamber 7 through the sealant charging bore 41. The sealant charging bore 41 is closed by affixing a raw rubber sheet 19 and vulcanizing it.
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