Making thermally-insulated tubing

Details Making thermally-insulated tubing Making thermally-insulated tubing

1979-04-30

1980-12-23

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

138114, 138148, 138149, 138151, 138164, 138DIG9, 156218, 156227, 156293, 156294, B32B 3106, B32B 520, B29C 2728

Patent

active

042408504

ABSTRACT:
A strip is folded longitudinally around a tube to, thereby, establish an assembly of an inner and a concentric outer tube; individual slotted foam strips are placed in transverse orientation onto the strip just prior to folding; they will become spacers with V-shaped notches. Just prior to closing the outer split tube, foam is introduced into the ring space between the tubes which will spread freely through the notches.

REFERENCES:
patent: 3307590 (1967-03-01), Carlson
patent: 3557840 (1971-01-01), Maybee
patent: 3563825 (1971-02-01), Segura et al.
patent: 4180101 (1979-12-01), Wegge
patent: 4182378 (1980-01-01), Dieter
Ferrigno, T. H., Rigid Plastics Foams (2nd ed.), New York: Reinhold Pub. Corp., pp. 172-173.

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