Leak-tight and rupture proof, ultrasonically-welded, polymer-enc

Details Leak-tight and rupture proof, ultrasonically-welded, polymer-enc Leak-tight and rupture proof, ultrasonically-welded, polymer-enc

1993-05-11

1995-01-10

Leung, Philip H.

Electricity: electrical systems and devices

Electrostatic capacitors

With protection or compensating means

3613061, 361518, 361520, 29 2542, 174 523, H01G 111

Patent

active

053813014

ABSTRACT:
A polymer-encased capacitor with a pressure sensitive interruption (PSI) system includes a polymer cover attached to a polymer case, the polymer cover having a skirt-less outer portion ultrasonically sealed to an open end portion of the polymer case. The polymer cover does not include flanged or lipped members extending from the outer edge of the cover (i e., "skirt-less") so that application of ultrasonic energy to the cover does not excite modes of vibration in which vibration nodes occur at intervals around the periphery of the cover, thereby providing a more leak-tight and rupture-proof bond between the capacitor case and cover.

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Kenney, "Designing Plastic Parts for Ultrasonic Assembly", Machine Design, May 21, 1992, pp. 65-68.

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