Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1979-08-20
1981-05-19
Wityshyn, Michael G.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156273, 156289, 156380, 156498, 156515, 1565831, 219 1053, 219 1081, B29C 2704
Patent
active
042683386
ABSTRACT:
Two or more layers of nonpolar thermoplastic film are bonded together by application of an RF current. The layers of thermoplastic film are pressed against a thin electrode plate, which lies atop a thin sheet of dielectric material supported on a conductive electrode die having a face or configuration to define the shape of the seal to be formed between the layers. RF current is applied to the electrode plate and to the electrode die, generating localized heat in the portions of the dielectric sheet overlying the die until the thermoplastic material has softened sufficiently to form a seal. A release agent, such as a sheet of polytetrafluoroethylene, can be provided on one surface of the electrode plate to prevent the thermoplastic material from sticking to the electrode plate.
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Eslinger Lewis H.
Peterson Electronic Die Co.
Wityshyn Michael G.
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