US4289173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Papermakers fabrics
Assignee: Scapa Blackburn Ltd
•
Filing: 1980-01-21
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Granted: 1981-09-15
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Expires: 2000-01-21
Abstract
Abstract The warp and/or the weft of a woven papermakers fabric is made from a combination of polyester monofilament yarns and separate yarns of a different material preferably a more wear-resistant material so that the polyester yarns give adequate dimensional stability while the other yarns impart a different property, preferably, improved wear resistance.
Inventors
- 👤 Terence Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:33
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0036; D03; D03D; D03D15/00; D03D15/20; D03D15/283; D10; D10B; D10B2331/00; D10B2331/04; Y; Y10; Y10S; Y10S162/00; Y10S162/903
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
A single layer forming fabric for supporting and draining water from a water laden web of cellulosic fibers in the wet end of a papermaking machine having a wet end and a dryer end, said fabric comprising: in at least one of the machine and cross-machine directions, first common direction yarns formed wholly from polyester material so as to impart dimensional stability in at least the or each direction in which said yarns extend, said woven structure also including further common direction yarns extending essentially parallel and lying in substantially the same plane with said first yarns, said further yarns being formed wholly from a synthetic material different from and of greater wear resistance than said polyester material of said first yarns, said first and further yarns being arranged adjacently in an alternating relationship throughout the fabric.
Claim 2
Dependent Claim
137 words
A single layer forming fabric for supporting and draining water from a water laden web of cellulosic fibers in the wet end of a papermaking machine having a wet end and a dryer end, said fabric comprising: in at least one of the machine and cross-machine directions, first common direction yarns formed wholly from polyester material so as to impart dimensional stability in at least the or each direction in which said yarns extend, said woven structure also including further common direction yarns extending essentially parallel and lying in substantially the same plane with said first yarns, said further yarns being formed wholly from a synthetic material different from and of greater wear resistance than said polyester material of said first yarns, said first and further yarns being arranged adjacently in an alternating relationship throughout the fabric.
Claim 3
Dependent Claim
38 words
A fabric according to claim 1, wherein the said further yarns constitute no more than 50% of the yarns in the or each direction in which they extend, the remaining yarns in such direction being said first yarns.
Claim 4
Dependent Claim
16 words
A fabric according to claim 2, wherein 50% of the yarns are the said further yarns.
Claim 5
Dependent Claim
13 words
A fabric according to claim 1, wherein said first yarns are monofilament yarns.
Claim 6
Dependent Claim
13 words
A fabric according to claim 1, wherein said further yarns are monofilament yarns.
Claim 7
Dependent Claim
19 words
A fabric according to claim 1, wherein said further yarns are substantially out of contact with said first yarns.
Claim 8
Dependent Claim
13 words
The forming fabric of claim 1, wherein said further yarns are polyamide yarns.
References Cited (Backward Citations)
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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) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |