US4798760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superimposed wet press felt
Assignee: Asten Inc
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Filing: 1987-09-09
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Granted: 1989-01-17
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Expires: 2007-09-09
Abstract
Abstract An improved wet press felt for a papermaking machine which includes a woven base layer (10), a layer of monofilament fiber mesh (20) oriented adjacent the woven base and at least one layer of non-woven batt material (32) affixed to the combination of woven base layer and mesh layer. When a plurality of layers of non-woven batt material (32, 34, 36) are employed, a layer of mesh (20, 22, 24) is oriented between adjacent batt layers.
Inventors
- 👤 Michelle A. Diaz-Kotti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/08; D21F7/083; Y; Y10; Y10S; Y10S162/00; Y10S162/90; Y10T; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/159
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
66 words
A method of forming a papermakers wet press felt for use in a papermaking machine which comprises the steps of: (a) providing a woven base fabric; (b) providing a contiguous layer of synthetic, polymeric resin netting upon said base fabric; (c) providing a non-woven fiber batt layer upon said layer of netting; and (d) fixing said batt layer to said netting layer and said base fabric.
Claim 2
Independent Claim
66 words
A method of forming a papermakers wet press felt for use in a papermaking machine which comprises the steps of: (a) providing a woven base fabric; (b) providing a contiguous layer of synthetic, polymeric resin netting upon said base fabric; (c) providing a non-woven fiber batt layer upon said layer of netting; and (d) fixing said batt layer to said netting layer and said base fabric.
Claim 3
Dependent Claim
32 words
The method of claim 1 wherein a plurality of layers of non-woven fiber layers are provided and a layer of said netting is interposed betwen adjacent layers of said non-woven fiber layers.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein said non-woven fiber batt layers are affixed to said woven base fabric and said fiber netting by needling.
Claim 5
Dependent Claim
22 words
The method of claim 1, wherein said non-woven fiber batt layers are affixed to said woven base fabric by sewing and needling.
Claim 6
Dependent Claim
36 words
The method of claim 1, wherein said non-woven fiber batt layers have a higher melt temperature than said netting layers whereby said fiber batt layers are affixed to said netting layers by sewing, needling or heating.
Claim 7
Dependent Claim
25 words
The method of claim 5, wherein said netting layers are a thermoplastic material selected from the group consisting of polyolefin, polyethylene, polyurethane, polyamide and polyester.
Claim 8
Dependent Claim
16 words
The method of claim 5 wherein said non-woven fiber batt layers include thermoplastic fibers dispersed therein.
Claim 9
Dependent Claim
64 words
A wet press felt comprising: (a) a woven base fabric; (b) a layer of a synthetic, polymeric resin netting having a mesh count per linear inch of between 4 and 64; (c) said netting layer being contiguous with said base fabric; and (d) a layer of batt material disposed upon said netting layer and affixed to both said netting layer and said base fabric.
Claim 10
Dependent Claim
64 words
A wet press felt comprising: (a) a woven base fabric; (b) a layer of a synthetic, polymeric resin netting having a mesh count per linear inch of between 4 and 64; (c) said netting layer being contiguous with said base fabric; and (d) a layer of batt material disposed upon said netting layer and affixed to both said netting layer and said base fabric.
Claim 11
Dependent Claim
26 words
The wet press felt of claim 8 further comprising a plurality of said batt layers with a layer of said netting interposed between adjacent layers thereof.
Claim 12
Dependent Claim
17 words
The wet press felt of claim 8 wherein said batt layer is needled to said base fabric.
Claim 13
Dependent Claim
20 words
The wet press felt of claim 8 wherein said netting layer has a lower melt temperature than said batt material.
Claim 14
Dependent Claim
28 words
The wet press felt of claim 11, wherein said netting is comprised of a thermoplastic material selected from the group consisting of polyolefin, polyethylene, polyurethane, polyamide and polyester.
Claim 15
Dependent Claim
17 words
The wet press felt of claim 11 wherein said batt material further includes thermoplastic fibers dispersed therein.
Claim 16
Dependent Claim
19 words
The wet press felt of claim 8, further having said netting oriented on both sides of said batt material.
Claim 17
Dependent Claim
84 words
A papermakers wet press felt for use in a papermaking machine comprising: (a) base fabric comprised of a plurality of interconnected monofilament yarns; (b) a layer of non-woven batt material; (c) a layer of synthetic, polymeric resin netting having a mesh count per linear inch of between 4 and 64; (d) said netting layer contiguous with said base fabric and sandwiched between said base fabric and said batt layer; and (e) said batt layer being fixed to said netting layer and said base fabric.
Claim 18
Dependent Claim
84 words
A papermakers wet press felt for use in a papermaking machine comprising: (a) base fabric comprised of a plurality of interconnected monofilament yarns; (b) a layer of non-woven batt material; (c) a layer of synthetic, polymeric resin netting having a mesh count per linear inch of between 4 and 64; (d) said netting layer contiguous with said base fabric and sandwiched between said base fabric and said batt layer; and (e) said batt layer being fixed to said netting layer and said base fabric.
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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) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |