Textiles: manufacturing – Thread finishing – Surface modification of running length
Patent
1998-10-14
2000-11-21
Vanatta, Amy B.
Textiles: manufacturing
Thread finishing
Surface modification of running length
28254, D02G 116
Patent
active
061484903
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a process and apparatus for texturing at least one continuous filament yarn consisting of a yarn duct with compressed air supply and a texturing chamber limited by a deflecting member for a take-off of the textured yarn substantially at right angles to the yarn duct.
STATE OF THE ART
The theoretical principles of air jet texturing are described in the specialist article: Bock/Luinenschloss, Textilpraxis International, June 1984. Two design concepts can now be distinguished in practice: one with an internal texturing chamber and the other with an external texturing chamber. FIG. 1 of the patent specification shows schematically, with reference to the specialist article, the main functions of the texturing process with an external texturing zone which is not constructionally limited in the direction of flow. EF denotes the continuous filament as unimproved filament yarn Groh and Gtex as textured yarn. The continuous filament EF is grasped by the air stream, opened and delivered with excess directly into the texturing zone T. The texturing zone is the actual processing zone in which texturing takes place. The textured yarn Gtex is taken off substantially at right angles (thin arrow) from a braiding point F. The direction of the air stream is symbolized by thick arrows. FIG. 2 shows a cross section through a texturing nozzle from the prior art with external texturing chamber. GW designates the yarn path. It has been found in practice that it is important to provide a deflecting member P to limit the texturing chamber T with respect to texturing quality. Almost without exception, all texturing apparatuses nowadays employ deflecting members. The main advantage resides in exact restriction or definition of the texturing chamber T, so the texturing conditions can be reproduced to a great extent. In FIG. 2, the deflecting member is in the form of a roller and is arranged at a distance A after the yarn duct. The textured yarn is guided round the deflecting member. FIGS. 2a and 2b show two correspondingly known texturing nozzles produced by the applicants with external texturing chamber. In FIG. 2a, the threading position Epos (P') is shown in dot-dash lines in addition to the operating position Bpos according to FIG. 2. For drawing in the yarn, the deflecting member is pivoted in the form of an arc from the yarn duct so the yarn path in the region of the texturing chamber is free for the threading process, for example with a threading gun. FIGS. 3 and 3a show a further known design of a texturing apparatus, for example according to EPA No. 88 254. FIG. 3 is the threading position (Epos) and FIG. 3a the operating position (Bpos). Significant differences from FIG. 2 can be seen in FIG. 3. The air is supplied LA via apertures which are arranged at an angle and open directly into the yarn duct. The last portion of the yarn duct is widened in the form of a trumpet and the deflecting member P penetrates partially into the trumpet form (FIG. 3a) and forms an internal texturing chamber T. As in the solution according to FIG. 2, the deflecting member in FIG. 3a also blocks the free escape of the air from the nozzle and represents an obstruction for the threading process in the yarn path. As shown in FIG. 3, the deflecting member is pivoted away for the threading position (P'), so the yarn path is no longer obstructed for threading. The quality of the textured yarn can be monitored by a quality sensor Qs and electronic evaluator el.A. The actual texturing nozzle is fixed in a nozzle head DK, like the air connection LA. The compressed air is introduced at a pressure higher than 3 bar, preferably higher than 4 bar, for the texturing process and the air jet is driven in the direction of the widened nozzle orifice. An ultrasonic stream which effects texturing is adjusted owing to the high pressure at the first cross-sectional widening of the nozzle, even with the trumpet shape. The term "texturing" is interpreted in accordance with the currently accepted specialist opinion as the finis
REFERENCES:
patent: 3835510 (1974-09-01), Koslowski
patent: 3881231 (1975-05-01), Price et al.
patent: 4507833 (1985-04-01), Simmen
patent: 4547938 (1985-10-01), Cullen et al.
patent: 4641504 (1987-02-01), Runkel et al.
patent: 4936000 (1990-06-01), Nabulon et al.
patent: 4953271 (1990-09-01), Wellenhofer et al.
patent: 5140729 (1992-08-01), Simmen
patent: 5241730 (1993-09-01), Simmen et al.
patent: 5475908 (1995-12-01), Scherpf et al.
patent: 5475909 (1995-12-01), Heil et al.
patent: 5511295 (1996-04-01), Shah
patent: 5575049 (1996-11-01), Gorrafa et al.
G. Bock et al., "The Intermingling Action During Air-Jet Texturing", Textil Praxis International, 39:551-558 (1984).
Heberlein Fibertechnology, Inc.
Vanatta Amy B.
LandOfFree
Process and device for texturing at least one endless filament y does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and device for texturing at least one endless filament y, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and device for texturing at least one endless filament y will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1246253