Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1987-03-10
1989-05-30
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
165173, 264241, 264259, 264261, B29C 6502
Patent
active
048349305
ABSTRACT:
Heat and/or transferring apparatus which comprises at least one group of tubes from synthetic thermoplastic material, in which each tube end is surrounded by a sleeve from synthetic thermoplastic material having no porosity or a prosity of an more than 20% of the wall volume. All tube ends with sleeves of one group are surrounded by a second sleeve, whereby the sleeves of the tube ends have substantially the same length as the second sleeve. On the end face the tube ends are each fused with the sleeve end surrounding the same, adjacent sleeve ends are fused with one another, and external sleeve ends are fused with the second sleeve. The heat and/or mass transferring apparatus can be made by positioning each tube in a sleeve, assembling a group of tubes provided with sleeves and inserting the same into a second sleeve, and positioning the tubes within the sleeves and the second sleeve substantially vertically upward, whereupon theat is supplied from above, causing the tube ends to fuse with the sleeves, and the sleeves with one another or with the second sleeve.
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Akzo N.V.
Lowe James
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