Rubber/plastic stopper composite with mechanical adhesive joints

Details Rubber/plastic stopper composite with mechanical adhesive joints Rubber/plastic stopper composite with mechanical adhesive joints

1986-08-18

1987-10-06

Norton, Donald F.

Bottles and jars

Closures

Cap type

B65D 4128

Patent

active

046977171

ABSTRACT:
A stopper is provided, particularly for evacuated blood sample tubes, comprised of a combination of thermoplastic and rubber, which combination utilizes a plurality of circumferentially spaced joints containing an adhesive. The joints serve to mechanically hold the composite body of rubber and plastic together. The arrangement reduces the quantity of rubber used while retaining its desirable sealing properties, and reducing the quantity of relatively inexpensive thermoplastic and its desirable strength properties. The invention takes advantage of the relatively good joining properties of a rubber-adhesive combination, and avoids the relatively poor joining properties of a thermoplastic adhesive combination.

REFERENCES:
patent: 807381 (1905-12-01), Hicks
patent: 3499568 (1970-03-01), Riera
patent: 4465200 (1984-08-01), Percarpio
patent: 4531651 (1985-07-01), Donnelly

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