| US 7,402,031 B2 | ||
| Piece for tire mold, method of producing the piece, piece-type tire mold and method of producing the piece-type tire mold | ||
| Kiyoshi Hyakutake, Tokyo (Japan); Hisatoshi Yamamoto, Tokyo (Japan); and Hiroshi Yoshida, Tokyo (Japan) | ||
| Assigned to Kabushiki Kaisha Bridgestone, Tokyo (Japan) | ||
| Appl. No. 10/513,468 PCT Filed May 23, 2003, PCT No. PCT/JP03/06461 § 371(c)(1), (2), (4) Date Jul. 11, 2005, PCT Pub. No. WO03/099535, PCT Pub. Date Dec. 04, 2003. |
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| Claims priority of application No. 2002-149279 (JP), filed on May 23, 2002; and application No. 2002-199987 (JP), filed on Jul. 09, 2002. | ||
| Prior Publication US 2005/0248053 A1, Nov. 10, 2005 | ||
| Int. Cl. B29C 33/10 (2006.01) | ||
| U.S. Cl. 425—28.1 [425/46; 425/812] | 6 Claims |
| 1. A tire mold piece used in a piece type tire mold having a plurality of tire mold pieces arranged circumferentially to form
a tread forming portion of a tire to be formed, the tire mold piece comprising:
a slit open to an inner side of the plurality of tire mold pieces facing the tire to be formed,
wherein one end of the slit ends at a piece dividing face of one of the plurality of tire mold pieces between adjacent tire
mold pieces and an other end thereof is located in a portion corresponding to a land portion of the tire to be formed and
defined by a projection or a blade adapted to form a tire pattern,
wherein the other end of the slit is bounded by the tire mold piece,
wherein the width of the slit is equal to or less than 0.1 mm.
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