Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1986-12-04
1988-09-20
Lieberman, Allan M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524272, 524487, 524488, 524489, C08L 2504, C08L 3306, C08L 9106, C08L 9304
Patent
active
047726504
ABSTRACT:
Tamper-resistant inner seals that bond firmly to the lips of lidded and capped glass and plastic containers. The innerseals incorporate a metallic foil having a heat-sealable adhesive applied to one surface thereof. The heat-sealable adhesive comprises a paraffin wax or blend of paraffin wax and microcrystalline wax, polystyrene or derivative thereof, rosin or derivative thereof, and at least one high molecular weight polymeric material selected from the group consisting of ethylene/acrylic acid copolymers, ethylene/vinyl acetate copolymers, ethylene/methacrylate copolymers, and ethylene/vinyl acetate/methacrylic acid terpolymers, and blends thereof.
REFERENCES:
patent: 3644252 (1972-02-01), Sheffeld et al.
patent: 4013188 (1977-03-01), Ray
patent: 4167433 (1979-09-01), Lakshmanan
patent: 4345349 (1982-08-01), Flanagan
patent: 4503123 (1985-03-01), Ou-Yang
patent: 4579240 (1986-04-01), Ou-Yang
patent: 4618640 (1986-10-01), Tsuchida et al.
Safe-Gard Innerseals brochure.
Lieberman Allan M.
Minnesota Mining and Manufacturing Co.
Sell Donald M.
Weinstein David L.
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