| 摘要 |
PURPOSE: To form an individual desired mark on the visible surface of a tire by a simple means even after vulcanization by subjecting a rubber surface to vulcanization treatment at first and carving a mark in the rubber surface by applying a laser device or the like for the first time after vulcanization treatment. CONSTITUTION: Each of the sidewalls of a tire is irradiated with laser beam 14 as clock pulses with a short pulse width, for examaple, of 100 ns-100 Hz through a diaphragm 23, an optical member 15 and a mirror 16 by a CO2 laser device 13 in order to form laser beam into a desired focal form and laser beam strikes against the sidewall at a carving point 17 to peel the outer rubber layer of the tire by high temp. processing technique. In order to form a desired predetermined carving mark, a corordinates system wherein the origin of the tire is present at the central part in the radial direction of the tire is attached to the tire. |
