Patent FR541840A successfully refreshed from Google Patents.
US4529013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Papermakers fabrics
Assignee: Scapa Blackburn Ltd
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Filing: 1981-08-04
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Granted: 1985-07-16
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Expires: 2001-08-04
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
2026-11-05 09:57
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: 21
Claim 1
Independent Claim
118 words
A forming fabric for supporting and draining water from a water laden web of cellulosic fibers for use in the wet end of a papermaking machine having a wet end and a dryer end, said fabric comprising: a woven structure of machine direction and cross-machine direction yarns; first cross-machine direction yarns formed wholly from polyester material so as to impart dimensional stability in the cross-machine direction in which such yarns extend; said fabric also including further cross-machine direction yarns separate from and extending essentially parallel with said first cross-machine direction yarns, said further cross-machine direction yarns being formed wholly from a synthetic material different from and of greater wear resistance than said polyester material of said first yarns.
Claim 2
Dependent Claim
118 words
A forming fabric for supporting and draining water from a water laden web of cellulosic fibers for use in the wet end of a papermaking machine having a wet end and a dryer end, said fabric comprising: a woven structure of machine direction and cross-machine direction yarns; first cross-machine direction yarns formed wholly from polyester material so as to impart dimensional stability in the cross-machine direction in which such yarns extend; said fabric also including further cross-machine direction yarns separate from and extending essentially parallel with said first cross-machine direction yarns, said further cross-machine direction yarns being formed wholly from a synthetic material different from and of greater wear resistance than said polyester material of said first yarns.
Claim 3
Dependent Claim
34 words
A fabric according to claim 1, where said further yarns constitute no more than 50% of the yarns in the cross-machine direction, the remaining yarns in said cross-machine direction all being said first yarns.
Claim 4
Dependent Claim
16 words
A fabric according to claim 1, wherein said further yarns are interposed between said first yarns.
Claim 5
Dependent Claim
27 words
A fabric according to claim 3, wherein 50% of the yarns are said further yarns and wherein said further yarns and said first yarns are arranged alternately.
Claim 6
Dependent Claim
30 words
A fabric according to claim 1, comprising at least two layers of cross-machine direction yarns comprising an upper layer of first yarns and a lower layer of said further yarns.
Claim 7
Dependent Claim
38 words
A fabric according to claim 5, wherein 50% of the yarns are said further yarns and wherein the upper layer is formed wholly of said first yarns and the lower layer is formed wholly of said further yarns.
Claim 8
Dependent Claim
13 words
A fabric according to claim 1, wherein said further yarns are polyamide yarns.
Claim 9
Dependent Claim
13 words
A fabric according to claim 1, wherein said first yarns are monofilament yarns.
Claim 10
Dependent Claim
13 words
A fabric according to claim 1, wherein said further yarns are monofilament yarns.
Claim 11
Dependent Claim
19 words
A fabric according to claim 1, wherein said further yarns are substantially out of contact with said first yarns.
Claim 12
Dependent Claim
98 words
A multi-layer papermakers wet end fabric having a web support layer and a machine element contacting layer, each layer being defined by common direction yarns, said fabric comprising: in one of said layers, a first plurality of said common direction yarns formed wholly from polyester material so as to impart dimensional stability in the direction in which said yarns extend, and, in the other of said layers, a second plurality of said common direction yarns formed wholly from a synthetic material different from and of greater wear resistance than said polyester material of said first plurality of yarns.
Claim 13
Dependent Claim
98 words
A multi-layer papermakers wet end fabric having a web support layer and a machine element contacting layer, each layer being defined by common direction yarns, said fabric comprising: in one of said layers, a first plurality of said common direction yarns formed wholly from polyester material so as to impart dimensional stability in the direction in which said yarns extend, and, in the other of said layers, a second plurality of said common direction yarns formed wholly from a synthetic material different from and of greater wear resistance than said polyester material of said first plurality of yarns.
Claim 14
Dependent Claim
19 words
The wet end fabric of claim 11, wherein said second plurality of said common direction yarns are polyamide yarns.
Claim 15
Dependent Claim
120 words
A multi-layer papermakers wet end fabric having a web support layer and a machine element contacting layer, said fabric comprising: a first plurality of common direction yarns defining one of said layers, each of the yarns of said first plurality being formed wholly from polyester material so as to impart dimensional stability in the direction in which said yarns extend, and a second plurality of common direction yarns defining the other of said layers, and extending in the same direction as said first plurality of common direction yarns, each of the yarns of said second plurality being formed wholly from a synthetic material different from and of greater wear resistance than said polyester material of said first plurality of yarns.
Claim 16
Dependent Claim
120 words
A multi-layer papermakers wet end fabric having a web support layer and a machine element contacting layer, said fabric comprising: a first plurality of common direction yarns defining one of said layers, each of the yarns of said first plurality being formed wholly from polyester material so as to impart dimensional stability in the direction in which said yarns extend, and a second plurality of common direction yarns defining the other of said layers, and extending in the same direction as said first plurality of common direction yarns, each of the yarns of said second plurality being formed wholly from a synthetic material different from and of greater wear resistance than said polyester material of said first plurality of yarns.
Claim 17
Dependent Claim
135 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: first cross-machine direction yarns formed wholly from polyester material so as to impart dimensional stability in the cross-machine direction in which said yarns extend, said woven structure also including further cross-machine direction yarns extending essentially parallel and lying in substantially the same plane with said first yarns, said further yarns being formed wholly from a nylon material of greater wear resistance than said polyester material of said first yarns, said first and further cross-machine direction yarns being arranged symmetrically throughout the fabric and said further yarns constituting no more than 50% of the yarns in the cross-machine direction.
Claim 18
Dependent Claim
135 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: first cross-machine direction yarns formed wholly from polyester material so as to impart dimensional stability in the cross-machine direction in which said yarns extend, said woven structure also including further cross-machine direction yarns extending essentially parallel and lying in substantially the same plane with said first yarns, said further yarns being formed wholly from a nylon material of greater wear resistance than said polyester material of said first yarns, said first and further cross-machine direction yarns being arranged symmetrically throughout the fabric and said further yarns constituting no more than 50% of the yarns in the cross-machine direction.
Claim 19
Dependent Claim
118 words
A forming fabric for supporting and draining water from a water laden web of cellulosic fibers for use in the wet end of a papermaking machine having a wet end and a dryer end, said fabric comprising: a woven structure of machine direction and cross-machine direction yarns; first machine direction yarns formed wholly from polyester material so as to impart dimensional stability in the machine direction in which such yarns extend; said fabric also including further machine direction yarns separate from and extending essentially parallel with said first machine direction yarns, said further machine direction yarns being formed wholly from a synthetic material different from and of greater wear resistance than said polyester material of said first yarns.
Claim 20
Dependent Claim
118 words
A forming fabric for supporting and draining water from a water laden web of cellulosic fibers for use in the wet end of a papermaking machine having a wet end and a dryer end, said fabric comprising: a woven structure of machine direction and cross-machine direction yarns; first machine direction yarns formed wholly from polyester material so as to impart dimensional stability in the machine direction in which such yarns extend; said fabric also including further machine direction yarns separate from and extending essentially parallel with said first machine direction yarns, said further machine direction yarns being formed wholly from a synthetic material different from and of greater wear resistance than said polyester material of said first yarns.
Claim 21
Dependent Claim
31 words
A fabric according to claim 15, further comprising at least two layers of cross-machine direction yarns comprising an upper layer of first yarns and a lower layer of said further yarns.
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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) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |