| 摘要 |
PROBLEM TO BE SOLVED: To provide an easy-to-read engraved mark, and to avoid deterioration due to traveling. SOLUTION: In the V-ribbed belt 1, pluralities of upper side and lower side rib rubber parts 4 and 5 are provided on both upper and lower faces of an adhered rubber part 3 embedded spirally with core wire 2. The rib rubber parts 4 and 5 have upper and lower ribs 4a and 5a extending in a belt longitudinal direction, and a mark 6 is engraved by a laser beam on rib tip faces 4b and 5b of the upper and lower ribs 4a and 5a. COPYRIGHT: (C)2007,JPO&INPIT
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