Improvements in or relating to apparatus for manufacturing rubber stems of tyre and like valves

  • Inventors:
  • Assignees: Jenkins Bros
  • Publication Date: March 02, 1939
  • Publication Number: GB-501790-A


501,790. Moulding tyre-valve stems. JENKINS BROS. Sept. 2, 1937, No. 19002/38. Convention date, Sept. 30, 1936. Divided out of 501,750. [Class 87 (ii)] The rubber stem of a tyre or like valve having a metal insert 13 of the kind described in Specification 501,750 is moulded in a threepart die 42, 43, 44. The part 42 carries a pin 46 for the bore of the stem and is guided by a tubular fitting 45<1> serving to position the insert 13. A conical part 49 of the pin swages the opening in the insert and prevents entry of rubber therein.




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