Advancing material of indeterminate length – By fluid current – And web storage
Patent
1978-01-30
1980-01-01
Skaggs, H. Grant
Advancing material of indeterminate length
By fluid current
And web storage
28255, 28273, B65H 1732
Patent
active
041812476
ABSTRACT:
A yarn-handling device is provided which operates in accordance with the principle of aspiration and exhibits improved efficiency and less noise. The device, which is suitable for string-up, doffing and stripping operations, has a yarn inlet tube and a yarn outlet tube located in series on the same longitudinal axis. The outer surface of the outlet end of the yarn inlet tube is frusto-conical, having a taper angle of about 25.degree. with the axis and containing a plurality of flutes, each at an angle of about 30.degree. with the slant height of the frusto-conical surface. The inlet to the yarn outlet tube is preceded by another frusto-conical surface which is coaxial with the first mentioned frusto-conical surface and spaced therefrom in almost nested relationship to form an annular passage for pressurized air to flow into the yarn outlet tube, aspirate yarn into the yarn inlet tube and carry the yarn through the tubes.
REFERENCES:
patent: 2233327 (1941-02-01), Sauer
patent: 2971243 (1961-02-01), Burns
patent: 3156395 (1964-11-01), Ashby et al.
patent: 3669328 (1972-06-01), Castelli
E. I. Du Pont de Nemours and Company
Skaggs H. Grant
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