US4489125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Batt-on-mesh press felt having increased abrasion resistance, batt retention and dimensional stability
Assignee: Porritts and Spencer Inc
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Filing: 1983-12-16
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Granted: 1984-12-18
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Expires: 2003-12-16
Abstract
Abstract A batt-on-mesh press felt having improved abrasion resistance, batt retention, and dimensional stability comprising a fibrous batt in combination with a woven mesh base. The woven mesh base comprises an ionomer resin-encapsulated nylon yarn in the cross-machine direction and nylon yarn in the machine direction.
Inventors
- 👤 Yvon P. Gagnon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:27
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; B32B5/08; B32B5/024; B32B5/06; D; D21; D21F; D21F7/00; D21F7/08; D21F7/083; B32B2262/00; B32B2262/02; B32B2262/0261; Y; Y10; Y10S; Y10S162/00; Y10S162/90; Y10T; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/103; Y10T442/107; Y10T442/50; Y10T442/56
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
34 words
A press felt comprising a woven mesh base and a fibrous batt disposed thereon, said woven mesh base comprising nylon yarn in the machine direction and ionomer resin-encapsulated nylon yarn in the cross-machine direction.
Claim 2
Dependent Claim
34 words
A press felt comprising a woven mesh base and a fibrous batt disposed thereon, said woven mesh base comprising nylon yarn in the machine direction and ionomer resin-encapsulated nylon yarn in the cross-machine direction.
Claim 3
Dependent Claim
19 words
The press felt of claim 1 wherein said nylon yarn is selected from monofilament, multifilament, or cabled monofilament yarn.
Claim 4
Dependent Claim
35 words
The press felt of claim 1 wherein said nylon yarn in the machine direction is a multifilament nylon yarn and wherein said ionomer resin-encapsulated nylon yarn in the cross-machine direction is a multifilament nylon yarn.
Claim 5
Dependent Claim
29 words
The press felt of claim 1 wherein said fibrous batt is selected from natural fibrous materials, synthetic fibrous materials, or mixtures of natural fibrous materials and synthetic fibrous materials.
Claim 6
Dependent Claim
17 words
The press felt of claim 1 wherein said fibrous batt is needled to said woven mesh base.
Claim 7
Dependent Claim
20 words
The press felt of claim 1 wherein the ionomer resin is a metal salt of an ethylene-vinyl carboxylic acid copolymer.
Claim 8
Dependent Claim
81 words
A press felt comprising a mesh base, said mesh base comprising nylon yarn in the machine direction and ionomer resin-encapsulated nylon yarn in the cross-machine direction and a fibrous batt disposed on said mesh base, a portion of the fibers of said fibrous batt penetrating the ionomer resin of said ionomer resin-encapsulated nylon yarn and being permanently locked thereto by a heating step, said heating step causing the ionomer resin to soften and melt around the fibers which have penetrated it.
Claim 9
Dependent Claim
81 words
A press felt comprising a mesh base, said mesh base comprising nylon yarn in the machine direction and ionomer resin-encapsulated nylon yarn in the cross-machine direction and a fibrous batt disposed on said mesh base, a portion of the fibers of said fibrous batt penetrating the ionomer resin of said ionomer resin-encapsulated nylon yarn and being permanently locked thereto by a heating step, said heating step causing the ionomer resin to soften and melt around the fibers which have penetrated it.
Claim 10
Dependent Claim
43 words
A press felt comprising a mesh base and a fibrous batt disposed thereon, said mesh base comprising nylon yarn in the machine direction and nylon yarn encapsulated with ionomer resin in the cross-machine direction, the cross-machine direction ionomer resin-encapsulated nylon yarn including crimping.
Claim 11
Dependent Claim
43 words
A press felt comprising a mesh base and a fibrous batt disposed thereon, said mesh base comprising nylon yarn in the machine direction and nylon yarn encapsulated with ionomer resin in the cross-machine direction, the cross-machine direction ionomer resin-encapsulated nylon yarn including crimping.
Claim 12
Independent Claim
44 words
A method of producing a press felt comprising needling a fibrous batt to a woven mesh base, said woven mesh base comprising nylon yarn in the machine direction and ionomer resin-encapsulated nylon yarn in the cross-machine direction, and heat treating the resulting press felt.
Claim 13
Independent Claim
44 words
A method of producing a press felt comprising needling a fibrous batt to a woven mesh base, said woven mesh base comprising nylon yarn in the machine direction and ionomer resin-encapsulated nylon yarn in the cross-machine direction, and heat treating the resulting press felt.
Claim 14
Dependent Claim
30 words
The method of claim 9 wherein, during the needling process, a small portion of the fibrous batt material is punched through the machine direction yarn and the cross-machine direction yarn.
Claim 15
Dependent Claim
34 words
The method of claim 10 wherein the heat treatment of the press felt is sufficient to melt the ionomer resin, thereby, upon cooling, locking the fibrous batt material to the ionomer-encapsulated cross-machine direction yarn.
Claim 16
Dependent Claim
17 words
The method of claim 9 wherein the cross-machine direction yarn is permanently crimped by the heat treatment.
Claim 17
Independent Claim
111 words
A method of producing a press felt comprising: (1) encapsulating nylon yarn with an ionomer resin; (2) weaving a base comprising nylon yarn in the machine direction and the ionomer encapsulated nylon yarn of (1) in the cross-machine direction; (3) needling a fibrous batt to the fabric of (2), whereby a small portion of the fibrous batt is punched through both the machine direction nylon yarn and the cross-machine direction ionomer resin-encapsulated nylon yarn; (4) heat treating (3) to melt the low-melting ionomer resin, followed by cooling, whereby the fibrous batt material punched through the cross-machine direction ionomer encapsulated nylon yarn becomes locked to said cross-machine direction ionomer encapsulated nylon yarn.
Claim 18
Independent Claim
111 words
A method of producing a press felt comprising: (1) encapsulating nylon yarn with an ionomer resin; (2) weaving a base comprising nylon yarn in the machine direction and the ionomer encapsulated nylon yarn of (1) in the cross-machine direction; (3) needling a fibrous batt to the fabric of (2), whereby a small portion of the fibrous batt is punched through both the machine direction nylon yarn and the cross-machine direction ionomer resin-encapsulated nylon yarn; (4) heat treating (3) to melt the low-melting ionomer resin, followed by cooling, whereby the fibrous batt material punched through the cross-machine direction ionomer encapsulated nylon yarn becomes locked to said cross-machine direction ionomer encapsulated nylon yarn.
Claim 19
Dependent Claim
34 words
The method of claim 13 wherein the machine-direction nylon yarn and the cross-machine direction ionomer resin-encapsulated nylon yarn are the same, or different, and each is selected from monofilament, multifilament, or cabled monofilament yarn.
Claim 20
Dependent Claim
34 words
The method of claim 9 wherein said nylon yarn in the machine direction is a multifilament nylon yarn and wherein said ionomer-resin encapsulated nylon yarn in the cross-machine direction is a multifilament nylon yarn.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |