Molding valve stems to rubber article

Details Molding valve stems to rubber article Molding valve stems to rubber article

1974-09-24

1977-03-01

Van Horn, Charles E.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

152429, 264275, B29H 1506

Patent

active

040100529

ABSTRACT:
A method of bonding a valve stem assembly adapted to a rubber sheet which includes the steps of inserting the stem in a concave mold, surrounding one end of the stem with an uncured rubber ring, inserting a removable plug in the core of the stem, placing an imperforate rubber sheet over the plugged end of the stem, and applying heat and pressure to the assembly so as to mold the ring and sheet around the end of the stem. The plug is then pushed out of the core of the stem.

REFERENCES:
patent: 1218779 (1917-03-01), Crate
patent: 2666007 (1954-01-01), Hovey
patent: 3017308 (1962-01-01), Pond
patent: 3069303 (1962-12-01), Scholle
patent: 3355340 (1967-11-01), Calvert et al.

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