Patent US4361618A successfully refreshed from Google Patents.
US4361618A
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Papermakers felt with improved drainage
Assignee: Asten Inc
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Filing: 1981-05-18
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Granted: 1982-11-30
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Expires: 2001-05-18
Abstract
Abstract A papermaker's felt having improved water drainage properties for use in the press or dewatering section of papermaking machinery. The felt is formed by a base fabric comprised of machine and cross machine direction yarns in a plurality of large cable yarns which are secured to the base fabric by selected interweavings with the cross machine direction yarns. A felt batt is needled to the paper carrying surface of the felt and a second batt is needled to the machine or cable side of the fabric. The cables are maintained in a secured position generally spaced between pairs of machine direction yarns in the base fabric by means of the interweaving with the cross direction yarns.
Inventors
- 👤 Marcel Dufour
- 👤 Ecrire Pascaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:57
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/022; B32B5/06; B32B17/00; B32B17/02; D; D21; D21F; D21F7/00; D21F7/08; D21F7/083; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3179; Y10T442/3195; Y10T442/3203; Y10T442/3707; Y10T442/3724; Y10T442/3732
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
132 words
A papermaker's felt comprising: (a) a base fabric, said base fabric further comprising: (i) at least first and second machine direction yard systems, said second machine direction yarn system comprised of cable yarns which are fewer in number and greater in diameter than the yarns of said first machine direction yarn system and (ii) at least one a cross machine yarn system interwoven with said first machine direction yarn system in a selected repeat pattern, said cross machine yarn system having selected yarns within said repeat pattern which interweave with said cable yarns, each of said selected yarns to interweave with one cable yarn within said repeat pattern; (b) a first batt needled to said base fabric; and (c) a second batt needled to said base fabric adjacent to said cable yarns.
Claim 2
Dependent Claim
132 words
A papermaker's felt comprising: (a) a base fabric, said base fabric further comprising: (i) at least first and second machine direction yard systems, said second machine direction yarn system comprised of cable yarns which are fewer in number and greater in diameter than the yarns of said first machine direction yarn system and (ii) at least one a cross machine yarn system interwoven with said first machine direction yarn system in a selected repeat pattern, said cross machine yarn system having selected yarns within said repeat pattern which interweave with said cable yarns, each of said selected yarns to interweave with one cable yarn within said repeat pattern; (b) a first batt needled to said base fabric; and (c) a second batt needled to said base fabric adjacent to said cable yarns.
Claim 3
Dependent Claim
28 words
The papermaker's felt of claim 1 wherein: (a) alternating yarns within said repeat pattern of the cross machine yarn system are selected to interweave with said cable yarns.
Claim 4
Dependent Claim
54 words
The papermaker's felt of claim 2 wherein: (a) each of said alternating yarns within said repeat pattern interweaves with a yarn of said first machine direction systems, floats under a plurality of first machine direction yarns, interweaves with one of said cable yarns and floats under a second plurality of first machine direction yarns.
Claim 5
Dependent Claim
50 words
The papermaker's felt of claim 3 wherein: (a) the remaining yarns within said repeat pattern of said cross machine direction yarns interweave with the yarns of said first machine direction system by passing over one yarn within said repeat pattern and floating under the remaining yarns within said repeat pattern.
Claim 6
Dependent Claim
15 words
The papermaker's felt of claim 1 wherein said base fabric is constructed using synthetic yarns.
Claim 7
Dependent Claim
19 words
The papermaker's felt of claim 1 wherein: said first machine direction yarn system is comprised of synthetic monofilament yarns.
Claim 8
Dependent Claim
20 words
The papermaker's felt of claim 6 wherein: said second machine direction yarn system is comprised of plied synthetic monofilament yarns.
Claim 9
Dependent Claim
20 words
The papermaker's felt of claim 6 wherein: said second machine direction yarn system is comprised of cut staple synthetic yarns.
Claim 10
Dependent Claim
36 words
The papermaker's felt of claim 7 or 8 wherein: said second machine direction yarn system is comprised of yarns having a diameter on the order of three times the diameter of said first machine direction yarns.
Claim 11
Dependent Claim
131 words
A papermaker's felt having improved drainage, said felt comprising: a base fabric, said fabric further comprising (i) first machine direction yarn system having an even number of yarns therein; (ii) second machine direction yarn system having cable yarns which are half in number and greater in diameter than the yarns of said first machine direction yarn system; and (iii) at least one cross machine direction yarn system interwoven with said first machine direction yarn system in a selected repeat pattern, said cross machine yarn system having selected yarns within said repeat pattern which interweave with said cable yarns, each of said selected yarns interwoven with one cable yarn within said repeat pattern and maintaining said one cable yarn between a respective pair of yarns of said first machine direction yarn system.
Claim 12
Dependent Claim
131 words
A papermaker's felt having improved drainage, said felt comprising: a base fabric, said fabric further comprising (i) first machine direction yarn system having an even number of yarns therein; (ii) second machine direction yarn system having cable yarns which are half in number and greater in diameter than the yarns of said first machine direction yarn system; and (iii) at least one cross machine direction yarn system interwoven with said first machine direction yarn system in a selected repeat pattern, said cross machine yarn system having selected yarns within said repeat pattern which interweave with said cable yarns, each of said selected yarns interwoven with one cable yarn within said repeat pattern and maintaining said one cable yarn between a respective pair of yarns of said first machine direction yarn system.
Claim 13
Dependent Claim
15 words
The papermaker's felt of claim 10 further comprising: a first batt needled to base fabric.
Claim 14
Dependent Claim
21 words
The papermaker's felt of claim 11 further comprising: a second batt needled to said base fabric adjacent to said cable yarns.
Claim 15
Dependent Claim
19 words
The papermaker's felt of claim 10 wherein: said first machine direction yarn system is comprised of snythetic monofilament yarns.
Claim 16
Dependent Claim
20 words
The papermaker's felt of claim 13 wherein: said second machine direction yarn system is comprised of plied synthetic monofilament yarns.
Claim 17
Dependent Claim
20 words
The papermaker's felt of claim 13 wherein: said second machine direction yarn system is comprised of cut staple synthetic yarns.
Claim 18
Dependent Claim
35 words
The papermaker's felt of claim 14 or 15 wherein: said second machine direction system is comprised of yarns having a diameter on the order of three times the diameter of said first machine direction yarns.
Claim 19
Dependent Claim
133 words
A papermaker's felt comprising: a base fabric, including (i) a first machine direction yarn system; (ii) a second machine direction yarn system comprised of cable yarns which are fewer in number and greater in diameter than the yarns of said first machine direction yarn system thereby defining a selected ratio therebetween; (iii) a cross machine yarn system interwoven with said first machine direction yarn system defining a selected repeat pattern; and (iv) selected yarns of said cross machine yarn system also interwoven with said second machine direction system defining a selected sub-repeat pattern within said repeat pattern such that the ratio between the number of yarns in said repeat pattern and the number of yarns also in said sub-repeat patterns equals said yarn ratio between said first and second machine direction yarn systems.
Claim 20
Dependent Claim
133 words
A papermaker's felt comprising: a base fabric, including (i) a first machine direction yarn system; (ii) a second machine direction yarn system comprised of cable yarns which are fewer in number and greater in diameter than the yarns of said first machine direction yarn system thereby defining a selected ratio therebetween; (iii) a cross machine yarn system interwoven with said first machine direction yarn system defining a selected repeat pattern; and (iv) selected yarns of said cross machine yarn system also interwoven with said second machine direction system defining a selected sub-repeat pattern within said repeat pattern such that the ratio between the number of yarns in said repeat pattern and the number of yarns also in said sub-repeat patterns equals said yarn ratio between said first and second machine direction yarn systems.
Claim 21
Dependent Claim
31 words
A papermaker's felt according to claim 17 further comprising: a first batt needled to said base fabric; and a second batt needled to said base fabric adjacent to said cable yarns.
Claim 22
Dependent Claim
15 words
The papermaker's felt according to claim 17 or 18 wherein: said selected ratio is 2:1.
Claim 23
Dependent Claim
16 words
The papermaker's felt according to claim 19 wherein: alternating cross machine yarns define said sub-repeat pattern.
Claim 24
Dependent Claim
18 words
The papermaker's felt according to claim 20 wherein: said repeat pattern is defined by eight cross machine yarns.
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) | 1985-11-29 | 1986-05-31 | 1986-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-29 | 1990-05-31 | 1990-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-29 | 1994-05-31 | 1994-11-30 | $7700.00 | Window Closed / Lapsed |