Plastic tank having fusion welded parts
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United States of America Patent
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Dec 12, 2017
Grant Date -
Jul 21, 2016
app pub date -
Jul 24, 2015
filing date -
Jul 24, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A large tubular plastic tank, for use in holding unpressurized water or wastewater, is formed by fusion welding together half-shell parts at lengthwise flange joints to form a tubular body. Then, end caps are fusion welded onto the outermost ends of the tubular body and an assembly of two or more bodies. Fusion weld elements are secured beforehand to the joining surfaces of the tank parts at a factory; the tank parts are then economically stored or shipped in nested condition to a fabrication site remote from the manufacturing site. Electric or electromagnetic energy is used to melt in situ the fusion weld elements which are captured between the joining surfaces of the parts.
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