Abstract: A method and an apparatus for manufacturing a bead filler which does not deteriorate the uniformity of a pneumatic tire are provided. The apparatus extrudes a rubber composition at a surface velocity V1 in a top portion 28 and at a surface velocity V2 in a base portion 26, while forming the rubber composition in the shape of a filler portion 24 in a forming portion 40 by a truncated cone shaped extruding roller 38. The filler portion 24 formed in a curved shape similar to a shape of a side portion of a tire is formed due to the difference in velocity between the surface velocities V1 and V2. The filler portion 24 is successively joined to and wound around an annular bead core from a winding start end, and is disposed in the side portion of the tire after forming the bead filler.

Abstract: A method of manufacturing a rubber sheet with rugged patterns formed on one side surface portion includes the step of preparing an apparatus including a rotating roll having rugged patterns, a member having an arcuate inner surface radially spaced apart from an outer peripheral surface of the rotating roll, and a die. The arcuate inner surface is recessed away from the rotating roll and defines an arcuate compartment chamber together with the outer peripheral surface of the rotating roll. The arcuate compartment chamber, has an inlet port and an outlet port. The die is placed in such a manner to adjoin to the outlet port portion of the compartment chamber, the die having an inner edge portion which is radially spaced apart from the outer peripheral surface of the rotating roll and defines an extrusive clearance together with the outer peripheral surface.