Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1989-09-15
1991-04-30
Wityshyn, Michael
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
55491, 55511, 156 733, 1565802, 264 23, 210445, 210446, B29C 6508
Patent
active
050115553
ABSTRACT:
A two step process for ultrasonically welding together first and second thermoplastic pieces and welding a membrane between these two pieces. The first piece comprises an annular bead, the second piece comprises an annular energy director. The method comprises first ultrasonically cutting and sealing the membrane to the first piece using an anvil comprising an annular projection and at the same time creating a groove in the first piece. The annular bead is ultrasonically melted and thus welds the membrane to the first piece. The first and second pieces are then brought together so that the groove and energy director are aligned. Under ultrasonic action, the energy director melts within the groove creating a strong weldment without any voids or material flashing.
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patent: 3932153 (1976-01-01), Byrns
patent: 4417933 (1983-11-01), Bernat
patent: 4732631 (1986-03-01), Shimizu
patent: 4798639 (1989-01-01), Yamaguchi
patent: 4834819 (1989-05-01), Todo et al.
Branson Ultrasonics Corporation
Wityshyn Michael
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