Ultrasonic tube welding and cutting apparatus and method
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United States of America Patent
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May 25, 1999
Grant Date -
N/A
app pub date -
Mar 31, 1998
filing date -
Mar 31, 1998
priority date (Note) -
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Abstract
An ultrasonic apparatus and method for charging a coil with a refrigerant gas is described wherein a tube used to convey the gas into the cooling coil is welded shut on both sides of a cutting line so that gas in the tube cannot escape after the charging step has been completed. Die elements to enable such severing of the tube are described with each having corresponding spaced apart welding surfaces and with one of the elements having a cutting edge between its welding surfaces to cut the tube as its internal wall is sealed with an ultrasonic welder.
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