US4974642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connecting thread arrangement in dual fabric papermaking fabric
Assignee: Valmet Fabrics Oy
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Filing: 1989-06-02
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Granted: 1990-12-04
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Expires: 2009-06-02
Abstract
Abstract A wear resistant cloth for a paper-making machine, comprises a first fabric woven from first warp and weft threads and a second fabric woven from second warp and weft threads. The weft and warp count of the first fabric is preferably twice the warp and weft count of the second fabric. The cloth further comprises connecting threads parallel with the warp threads, arranged to interconnect the fabrics so that the first fabric forms the upper surface of the cloth and the second fabric correspondingly the lower surface of the cloth. In order to improve the wear resistance of the cloth, the connecting threads are arranged to be always at the same phase as the warp thread of that one the fabrics at which the interlacing takes place. The thread count of the connecting thread is the same as the warp count of the fabric.
Inventors
- 👤 Seppo Taipale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:26
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0036; D21F1/0045
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
A cloth for a paper machine, comprising: a first fabric woven from first warp and weft threads; a second fabric woven from second warp and weft threads, the weft and warp count of the first fabric being twice the warp and weft count of the second fabric; and connecting threads parallel with the warp threads, the connecting threads being arranged to interconnect the first and second fabrics so that the first fabric forms the upper surface of the cloth and the second fabric forms the lower surface of the cloth, wherein the connecting threads are arranged to always be at the same phase as the warp threads of the first and second fabrics at least at some of the points where interlacing between the warp and weft thread of said first and second fabrics takes place and the thread count of the connecting threads ar the same as the warp count of the second fabric.
Claim 2
Dependent Claim
155 words
A cloth for a paper machine, comprising: a first fabric woven from first warp and weft threads; a second fabric woven from second warp and weft threads, the weft and warp count of the first fabric being twice the warp and weft count of the second fabric; and connecting threads parallel with the warp threads, the connecting threads being arranged to interconnect the first and second fabrics so that the first fabric forms the upper surface of the cloth and the second fabric forms the lower surface of the cloth, wherein the connecting threads are arranged to always be at the same phase as the warp threads of the first and second fabrics at least at some of the points where interlacing between the warp and weft thread of said first and second fabrics takes place and the thread count of the connecting threads ar the same as the warp count of the second fabric.
Claim 3
Dependent Claim
46 words
A cloth according to claim 1, wherein: the connecting threads are arranged to go form one fabric to the other at each point where the phase of the connecting threads are the same as the phase of the warp threads of the first and second fabrics.
Claim 4
Dependent Claim
41 words
A cloth according to claim 2, wherein: said first warp and weft threads are each 0.17 mm. in diameter; said second warp and weft threads are each 0.25 mm. in diameter; and said connecting threads are each 0.13 mm. in diameter.
Claim 5
Dependent Claim
25 words
A cloth according to claim, wherein: the connecting threads are of smaller diameter than the warp threads of either of the first and second fabrics.
Claim 6
Dependent Claim
41 words
A cloth according to claim 3, wherein: said first warp and weft threads are each 0.17 mm. in diameter; said second warp and weft threads are each 0.25 mm. in diameter; and said connecting threads are each 0.13 mm. in diameter.
Claim 7
Dependent Claim
41 words
A cloth according to claim 1, wherein: said first warp and weft threads are each 0.17 mm. in diameter; said second warp and weft threads are each 0.25 mm. in diameter; and said connecting threads are each 0.13 mm. in diameter.
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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) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |