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US 4,219,601 AGranted
Rubber reinforcing member and a method of manufacturing the same
AssigneeBridgestone Tire Company Limited
InventorsOsamu Inoue, Masaru Abe, Koji Chiba, Isao Miyoshi
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Abstract
A rubber reinforcing member and a method of manufacturing the same are disclosed. The rubber reinforcing member is composed of rubber and a number of filamentous elements embedded therein. The filamentous element is formed of a metal or a material having a strength similar to that of the metal and has a helix on at least one end portion thereof.
Claims9
A rubber reinforcing member comprising;
- a number of filamentous elements each formed of a metal or a material having a tensile breaking strength of at least 140 kg/mm.sup.2 and arranged in parallel with each other, said filamentous elements being embedded in rubber, at least one end portion of the filamentous element is formed into a helix thereby having an axial compression modulus of elasticity smaller than that of the remaining central portion thereof.
A method of manufacturing a rubber reinforcing member, comprising the steps of:
- (a) intermittently forming a helix in a filamentous element formed of a metal or a material having a tensile breaking strength of at least 140 kg/mm.sup.2 and composed of two portions having different axial compression modulus of elasticity while feeding a number of the filamentous elements in a parallel arrangement;
- (b) embedding the filamentous elements in rubber to form a rubberized fabric;
- and
- (c) cutting the rubberized fabric at a position corresponding to the helical portion of the filamentous element having a smaller compression modulus of elasticity to produce strips of a rubber reinforcing member.
1 more element
A method of manufacturing a rubber reinforcing member, comprising the steps of:
- (a) intermittently forming a helix in a filamentous element formed of a metal or a material having a breaking strength of at least 140 kg/mm.sup.2 and composed of two portions having different axial compression modulus of elasticity while feeding a number of the filamentous elements in a parallel arrangement;
- (b) embedding said filamentous elements in rubber to form a rubberized fabric;
- (c) cutting the rubberized fabric at a position corresponding to the helical portion of the filamentous element having a smaller axial compression modulus of elasticity to produce fabric strips;
- and
- (d) successively joining side edges of the strips with each other after the cut ends of the strips having a smaller axial compression modulus of elasticity are aligned in a line with each other.
2 more elements
Dependencies are inferred from the claim text.