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US 5,054,173 AGranted
Method and apparatus for the enhanced crimping of multifilament yarn
AssigneeBarmag AG
InventorKlaus Schafer
Life of this patent
Estimating the term…
Abstract
A method and apparatus for the intense crimping of a multifilament yarn in a stuffer box is disclosed, and wherein a false twist is imparted to the advancing yarn at a location upstream of the stuffer box, and with the intensity of the false twist being periodically or aperiodically varied.
Claims16
A method of crimping a multifilament yarn and comprising the steps of
- advancing a multifilament yarn into a stuffer box to form a closely packed coherent filamentary body, and while
- imparting false twist to the advancing yarn at a location upstream of the stuffer box, and with the intensity of the false twist being periodically or aperiodically varied, and
- withdrawing the closely packed filamentary body from the stuffer box.
An apparatus for crimping a multifilament yarn and comprising
- a yarn treatment chamber comprising an inlet portion and a stuffer box portion,
- means for guiding an advancing multifilament yarn along a path of travel and into and through said yarn treatment chamber,and
- means positioned along said path of travel and upstream of said chamber for imparting false twist to the advancing yarn and such that the intensity of the false twist may be periodically or aperiodically varied.
Dependencies are inferred from the claim text.