Pipe with closure portion, heat exchanger header and method of producing therefor
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United States of America Patent
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-
Jul 27, 1999
Issued Date -
N/A
app pub date -
May 8, 1998
filing date -
Mar 29, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
In the end-closed pipe of the invention, a pair of half-cylindrical portions are opposed to each other to form a pipe portion, and part of an end portion of each of the half-cylindrical portions is folded or formed into a V-shaped or a U-shaped cross-section to form a half closure portion projecting from an inner surface thereof, and the half closure portions of the two half-cylindrical portions are bonded together so as to form a closure portion at the end portion of the pipe. Two closure portions are formed at the both ends of the pipe, and a partition portion which has same structure as that of the closure portion is formed between the two closure portions. In the heat exchanger header of the invention, a plurality of tube insertion holes are formed in the above end-closed pipe, and are spaced from one another along an axis thereof.
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