Leak-tight and rupture proof, ultrasonically-welded, polymer-encased electrical capacitor with pressure sensitive circuit interrupter
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United States of America Patent
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Jan 10, 1995
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N/A
app pub date -
May 11, 1993
filing date -
May 11, 1993
priority date (Note) -
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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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