Method of making vacuum cleaner hose

Details Method of making vacuum cleaner hose Method of making vacuum cleaner hose

1995-12-08

1997-07-15

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Corrugating

264506, 264167, 264239, B29C 4322, B29C 5900, D01D 520, B27N 308

Patent

active

056480407

ABSTRACT:
A vacuum cleaner hose and method and apparatus of making the same are provided, the hose having opposite ends and a plurality of annular corrugations between the opposite ends thereof, the corrugations comprising a plurality of alternating annular crests and annular valleys that are interconnected together by annular sidewalls, each valley and each crest defining a radius at the apex thereof, each valley being narrower than the crests and having a smaller radius than the crests.

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patent: 3872893 (1975-03-01), Roberts
patent: 4079757 (1978-03-01), Fischer et al.
patent: 4976289 (1990-12-01), Umemori et al.

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