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US3583140A Expired / Lapsed US ⏱️ 0.0 years remaining

Yarn bulking apparatus

Assignee: BASF SE
•
Filing: 1969-08-12
•
Granted: 1971-06-08
•
Expires: 1989-08-12
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Abstract

Abstract Apparatus for manufacturing bulky yarns employing flowing gaseous or liquid media by the false twist technique. It consists of a tubular yarn guide chamber and a lateral conduit for the fluid medium disposed perpendicularly to the axis of the guide chamber and opening into same tangentially to the internal wall thereof, the guide chamber being cylindrical and at the yarn inlet end having a drastically reduced cross-sectional area compared to the cross section of the remainder of the chamber. The fluid inlet is located immediately downstream of the yarn inlet end (in the direction of movement of the yarn) in the enlarged portion of the chamber. The latter narrows at a point downstream of the fluid inlet (in the direction of movement of the yarn) and subsequently opens into a tubular duct the internal wall of which contains groovelike recesses over at least part of its length.

Inventors

  • 👤 Friedrich Lorenz
  • 👤 Walter Laber

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-10 00:53
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 151 words
Apparatus for the manufacture of bulky yarns using a fluid medium by the false twist technique, said apparatus comprising of a tubular yarn guide chamber and an inlet for the fluid medium, said inlet being disposed perpendicularly to the axis of the guide chamber and opening into same tangentially to the internal wall thereof, the guide chamber being cylindrical and having a yarn inlet end of drastically reduced cross section compared with the cross section of the remainder of the chamber, and the fluid inlet being located immediately downstream of the yarn inlet end (in the direction of movement of the yarn) in the chamber, wherein the yarn guide chamber, at a constriction narrows downstream of the fluid inlet (in the direction of yarn movement), and thereby opens into a tubular duct, of reduced cross section the internal wall of which contains groovelike recesses over at least part of its length.
Claim 2
Dependent Claim 151 words
Apparatus for the manufacture of bulky yarns using a fluid medium by the false twist technique, said apparatus comprising of a tubular yarn guide chamber and an inlet for the fluid medium, said inlet being disposed perpendicularly to the axis of the guide chamber and opening into same tangentially to the internal wall thereof, the guide chamber being cylindrical and having a yarn inlet end of drastically reduced cross section compared with the cross section of the remainder of the chamber, and the fluid inlet being located immediately downstream of the yarn inlet end (in the direction of movement of the yarn) in the chamber, wherein the yarn guide chamber, at a constriction narrows downstream of the fluid inlet (in the direction of yarn movement), and thereby opens into a tubular duct, of reduced cross section the internal wall of which contains groovelike recesses over at least part of its length.
Claim 3
Dependent Claim 21 words
Apparatus as claimed in claim 1, in which the groovelike recesses are disposed parallel to the axis of the tubular duct.
Claim 4
Dependent Claim 21 words
Apparatus as claimed in claim 1, in which the groovelike recesses are disposed perpendicularly to the axis of the tubular duct.
Claim 5
Dependent Claim 17 words
Apparatus as claimed in claim 1, in which the groovelike recesses extend helically around the duct axis.
Claim 6
Dependent Claim 18 words
Apparatus as claimed in any preceding claim, in which the constriction of the yarn guide chamber is conical.

References Cited (Backward Citations)

US3041812A Cited
US3206922A Cited
US3477218A Cited
US3457610A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-06-07 1974-12-07 1975-06-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-06-07 1978-12-07 1979-06-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-06-07 1982-12-07 1983-06-08 $7700.00 Window Closed / Lapsed

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