Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Simultaneous severing and shaping – or severing while work...
Patent
1985-03-22
1989-04-11
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Simultaneous severing and shaping, or severing while work...
156251, 156515, 156518, 264248, B29C 6522, B32B 328, F28F 312
Patent
active
048204684
ABSTRACT:
A process for the assembly of welded plastic hollow plate heat exchangers in which hollow plastic plates with channels running in one direction are welded at the open edge of the sheets to hollow plastic spacing strips which have at least one closed channel running along the open edge of the hollow plastic plate parallel to the open face of the hollow plastic plate by using a taut hot wire, hot knife, or similar cut off and seal techniques and the heat exchangers made by this process. Further improved ruggedness and strength are achieved by melting together the ends of the spacers and the adjacent closed top of the hollow plates.
REFERENCES:
patent: 2510383 (1950-06-01), Dalgleish
patent: 2526649 (1950-10-01), Gaibel
patent: 2677747 (1954-05-01), Jaye
patent: 2735797 (1956-02-01), Schjeldahl
patent: 2796913 (1957-06-01), Fener et al.
patent: 3287195 (1966-11-01), Piazze
patent: 3402232 (1968-09-01), DeRusha
patent: 3435893 (1969-04-01), Withers
patent: 3580769 (1971-05-01), Parker
patent: 4055452 (1977-10-01), Carlisle
Webster's Ninth New Collegiate Dictionary, Springfield, Mass, Merriam-Webster, 1986, pp. 174,855.
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