Bellows and method for manufacturing the same

Details Bellows and method for manufacturing the same Bellows and method for manufacturing the same

1995-07-07

1998-12-15

Scherbel, David

Pipes and tubular conduits

Combined

With end structure

138121, 138127, F16L 914

Patent

active

058486178

ABSTRACT:
A tubular hollow molded body is formed with a resin having a bending resistance; the hollow molded body is inserted into a mold; a resin with less stress relaxation is injected into both ends of the hollow molded body through a connecting path to mold a bellows intermediate; the resin moved into the connecting path of the bellows intermediate is removed; and a cut is put in the hollow molded body to mold a bellows portion.

REFERENCES:
patent: 1767421 (1930-06-01), Wirth
patent: 3407102 (1968-10-01), Wilkinson
patent: 3825036 (1974-07-01), Stent
patent: 3874544 (1975-04-01), Harmon
patent: 4086665 (1978-05-01), Poirier
patent: 5222769 (1993-06-01), Kaempen
patent: 5305799 (1994-04-01), Dal Palu138109
TSCHACHER: "Faltenbalge aus PTFE", In: Gummi, Asbest, Kunststoffe, 6/67, S. 660, 662.

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