Vacuum cleaner hose and method for making same

Details Vacuum cleaner hose and method for making same Vacuum cleaner hose and method for making same

1995-12-06

1997-08-19

Scherbel, David

Pipes and tubular conduits

Flexible

Corrugated

138177, 138DIG11, 181196, 181247, F16L 1111

Patent

active

056577931

ABSTRACT:
A method and apparatus for manufacturing a hose for a vacuum cleaner, such hose having anti-whistling characteristics. In a standard blow molding process, a blow pipe is configured with a plurality of printing rollers having arcuate outer surfaces configured and spaced in such a manner as to assure engagement of the entirety of the hose with a printing roller during the manufacturing process. The printing rollers are provided with apertures which, upon engagement with the tacky material of the inner surface of inwardly extending corrugations causes indentations or protrusions in such surface. The roughened interior surface prevents the formation of audible harmonics when air passes through the tube response to a vacuum source at one end thereof.

REFERENCES:
patent: 2663321 (1953-12-01), Jantsch
patent: 3605817 (1971-09-01), Bauman et al.
patent: 3913622 (1975-10-01), Holden
patent: 4024894 (1977-05-01), Drossbach
patent: 4163619 (1979-08-01), Fales
patent: 4534923 (1985-08-01), Lupke
patent: 4655986 (1987-04-01), Cothran et al.
patent: 4802511 (1989-02-01), Hensley

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