Draft device

Details Draft device Draft device

2006-07-18

2006-07-18

Welch, Gary L. (Department: 3765)

Textiles: fiber preparation

Working

Drafting

Reexamination Certificate

active

07076840

ABSTRACT:
It is an object of the present invention to provide a draft device DR including draft rollers which, when a draft device composed of a plurality of draft roller pairs is used, can reduce the adverse effect of associated air currents resulting from the rollers rotating at high speed while maintaining a gripping force and can effectively utilize the associated air currents to suppress the spread of a bundle of fibers L. The present invention provides a draft device DR including a plurality of roller pairs that pull a bundle of fibers L while feeding the bundle downstream, wherein associated air currents resulting from a roller constituting the roller pair are passed through ends of the roller, and gaps are provided which form air passages in which the air currents act as air flows forming a prevention wall that hinders spread of the bundle of fibers fed while being drafted.

REFERENCES:
patent: 3212168 (1965-10-01), Sommer
patent: 3381350 (1968-05-01), Kemmler
patent: 4718225 (1988-01-01), Sanagi
patent: 5553357 (1996-09-01), Kim et al.
patent: 6021548 (2000-02-01), Temburg
patent: 4-37271 (1992-03-01), None
patent: 07-126926 (1995-05-01), None
patent: 7-126926 (1995-05-01), None
Office Action from the Japanese Patent Office dated Jan. 31, 2006 in corresponding Japanese Patent Application No. 2003-344688.

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