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

1993-03-29

1994-07-19

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Corrugating

264132, 2642093, 264284, 425336, 425385, 425396, B29C 5330

Patent

active

053306996

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 in response to a vacuum source at one end thereof.

REFERENCES:
patent: 2600254 (1952-06-01), Lysobey
patent: 3387330 (1968-06-01), Lemelson
patent: 3605817 (1971-09-01), Bauman et al.
patent: 3705779 (1972-12-01), van Zon
patent: 3844700 (1974-10-01), Sokolow
patent: 4062918 (1977-12-01), Nakanose
patent: 4184828 (1980-01-01), Farrell
patent: 4184831 (1980-01-01), Hegler et al.
patent: 4329314 (1982-05-01), Jackson et al.

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