US4669158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing warp wound on beams, starting from a series of continuous, partially-drafted thermoplastic yarns
Assignee: Val Lesina SpA
•
Filing: 1985-08-26
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Granted: 1987-06-02
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Expires: 2005-08-26
Abstract
Abstract A procedure for the drafting and interlacing of a series of continuous, thermoplastic yarns, consisting of filaments which are substantially parallel to one another, in the manufacture of warp wound on beams.
Inventors
- 👤 Vito Ballarati
- 👤 Franco Tajana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:29
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02H; D02H5/00; D02H5/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
112 words
A process for the preparation of warps of continuous, synthetic completely-drafted yarns of thermoplastic material selected from the group consisting of polyester, polyamide, polyethylene and polypropylene, said warps being wound on weaving beams, suitable for all types of loom-produced textiles, in which process a series of at least 24 yarns made of substantially parallel and partially drafted filaments are simultaneously and contemporaneously drafted when immersed in a vat containing a thermostatic liquid in the absence of a sizing agent, and subsequently subjecting said series of yarns to an interlacing treatment using a fluid jet and then to a thermosetting treatment, said interlacing treatment being carried out while the yarns are still wet.
Claim 2
Dependent Claim
112 words
A process for the preparation of warps of continuous, synthetic completely-drafted yarns of thermoplastic material selected from the group consisting of polyester, polyamide, polyethylene and polypropylene, said warps being wound on weaving beams, suitable for all types of loom-produced textiles, in which process a series of at least 24 yarns made of substantially parallel and partially drafted filaments are simultaneously and contemporaneously drafted when immersed in a vat containing a thermostatic liquid in the absence of a sizing agent, and subsequently subjecting said series of yarns to an interlacing treatment using a fluid jet and then to a thermosetting treatment, said interlacing treatment being carried out while the yarns are still wet.
Claim 3
Dependent Claim
25 words
A process, in accordance with claim 1, where the yarns, which are partially drafted, are subjected to a preliminary interlacing process prior to being drafted.
Claim 4
Dependent Claim
27 words
A process, in accordance with claim 1, where the interlacing process is carried out by means of a device which also causes the voluminization of the yarn.
Claim 5
Dependent Claim
24 words
A process, in accordance with claim 2, where the preliminary interlacing is obtained by means of the devices mounted directly onto the feed creel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |