US5454405A
Expired / Lapsed
US
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Triple layer papermaking fabric including top and bottom weft yarns interwoven with a warp yarn system
Assignee: Albany International Corp
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Filing: 1994-08-23
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Granted: 1995-10-03
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Expires: 2014-08-23
Abstract
Abstract A triple-layer papermaking fabric includes top and a bottom weft yarn layers interwoven with a system of warp yarns. The warp yarn system includes pairs of associated, stacked first and second warp yarns. The first warp yarn in each pair interweaves with the top weft yarns in a plain-weave pattern occasionally broken by an interweaving with a bottom weft yarn to join the top and bottom weft yarn layers together. The second warp yarn in each pair, ordinarily running between the top and bottom weft yarn layers and stacked below the first warp yarn, weaves over the top weft yarn skipped by the first warp yarn when it weaves down under a bottom weft yarn to maintain the plain-weave character of the top surface of the fabric. The second warp yarn never weaves with the bottom weft yarns. The fabric is flat-woven, and subsequently seamed into endless form. The first warp yarns have an exaggerated crimp to provide the fabric with an enhanced seam strength. The second warp yarns, having relatively little crimp, provide the fabric with an enhanced stretch resistance.
Inventors
- 👤 John M. Hawes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:15
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0036; D21F1/0045
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
179 words
A triple-layer papermaking fabric comprising: a system of top weft yarns and a system of bottom weft yarns; and a system of warp yarns having pairs of first and second warp yarns, said first warp yarns interweaving with said top weft yarns and occasionally binding said bottom weft yarns to said top weft yarns in a repeating pattern, and said second warp yarns interweaving with said top weft yarns by running between said top weft yarns and said bottom weft yarns to form a middle layer and by binding with said top weft yarns at points where their paired first warp yarns weave with said bottom weft yarns, said second warp yarns not interweaving with said bottom weft yarns, wherein said top weft yarns, and said first and second warp yarns form a top surface of said triple-layer papermaking fabric, wherein said first warp yarn in each of said pairs of first and second warp yarns is vertically stacked over its respective second warp yarn except at points where said second warp yarn weaves over a top weft yarn.
Claim 2
Dependent Claim
179 words
A triple-layer papermaking fabric comprising: a system of top weft yarns and a system of bottom weft yarns; and a system of warp yarns having pairs of first and second warp yarns, said first warp yarns interweaving with said top weft yarns and occasionally binding said bottom weft yarns to said top weft yarns in a repeating pattern, and said second warp yarns interweaving with said top weft yarns by running between said top weft yarns and said bottom weft yarns to form a middle layer and by binding with said top weft yarns at points where their paired first warp yarns weave with said bottom weft yarns, said second warp yarns not interweaving with said bottom weft yarns, wherein said top weft yarns, and said first and second warp yarns form a top surface of said triple-layer papermaking fabric, wherein said first warp yarn in each of said pairs of first and second warp yarns is vertically stacked over its respective second warp yarn except at points where said second warp yarn weaves over a top weft yarn.
Claim 3
Dependent Claim
23 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said bottom weft yarns have a greater diameter than said top weft yarns.
Claim 4
Dependent Claim
20 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said first and second warp yarns have the same diameter.
Claim 5
Dependent Claim
21 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said first and second warp yarns have a non-round cross section.
Claim 6
Dependent Claim
18 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said bottom weft yarns have a non-round cross-section.
Claim 7
Dependent Claim
19 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said top weft yarns have a non-round cross section.
Claim 8
Dependent Claim
25 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said first and second warp yarns and said top weft yarns have the same diameter.
Claim 9
Dependent Claim
30 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said top weft yarns, said bottom weft yarns, said first warp yarns and said second warp yarns are monofilament yarns.
Claim 10
Dependent Claim
18 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said top weft yarns are plied monofilament yarns.
Claim 11
Dependent Claim
18 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said bottom weft yarns are plied monofilament yarns.
Claim 12
Dependent Claim
17 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said top weft yarns are multifilament yarns.
Claim 13
Dependent Claim
17 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said bottom weft yarns are multifilament yarns.
Claim 14
Dependent Claim
31 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said top weft yarns, said bottom weft yarns, said first warp yarns and said second warp yarns are hydrolysis-resistant polyester yarns.
Claim 15
Dependent Claim
30 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said top weft yarns, said bottom weft yarns, said first warp yarns and said second warp yarns are polyamide yarns.
Claim 16
Dependent Claim
17 words
A triple-layer papermaking fabric as claimed in claim 1 wherein said bottom weft yarns are polyamide yarns.
Claim 17
Dependent Claim
190 words
A triple-layer papermaking fabric comprising: a system of top weft yarns and a system of bottom weft yarns; and a system of warp yarns having pairs of first and second warp yarns, said first warp yarns interweaving with said top weft yarns and occasionally binding said bottom weft yarns to said top weft yarns in a repeating pattern, and said second warp yarns interweaving with said top weft yarns by running between said top weft yarns and said bottom weft yarns to form a middle layer and by binding with said top weft yarns at points where their paired first warp yarns weave with said bottom weft yarns, said second warp yarns not interweaving with said bottom weft yarns, wherein said top weft yarns, and said first and second warp yarns form a top surface of said triple-layer papermaking fabric, wherein there are two yarns in said system of top weft yarns for every one yarn in said system of bottom weft yarns, and wherein alternate yarns in said system of top weft yarns are in a vertically stacked relationship with said yarns in said system of bottom weft yarns.
Claim 18
Dependent Claim
190 words
A triple-layer papermaking fabric comprising: a system of top weft yarns and a system of bottom weft yarns; and a system of warp yarns having pairs of first and second warp yarns, said first warp yarns interweaving with said top weft yarns and occasionally binding said bottom weft yarns to said top weft yarns in a repeating pattern, and said second warp yarns interweaving with said top weft yarns by running between said top weft yarns and said bottom weft yarns to form a middle layer and by binding with said top weft yarns at points where their paired first warp yarns weave with said bottom weft yarns, said second warp yarns not interweaving with said bottom weft yarns, wherein said top weft yarns, and said first and second warp yarns form a top surface of said triple-layer papermaking fabric, wherein there are two yarns in said system of top weft yarns for every one yarn in said system of bottom weft yarns, and wherein alternate yarns in said system of top weft yarns are in a vertically stacked relationship with said yarns in said system of bottom weft yarns.
Claim 19
Dependent Claim
55 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said first warp yarns interweave with said top weft yarns in a plain-weave pattern, and wherein said second warp yarns associated therewith interweave with said top weft yarns in a plain-weave pattern at points where said first warp yarns interweave with said bottom weft yarns.
Claim 20
Dependent Claim
98 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said first warp yarns weave over and under six consecutive top weft yarns, then weave under the next bottom weft yarn in a repeating pattern and then weave over the next top weft yarn to repeat said pattern, and wherein said second warp yarns weave under seven consecutive top weft yarns and over the next top weft yarn in a repeating pattern, said second warp yarns weaving over top weft yarns skipped by said first warp yarns when said first warp yarns weave with a bottom weft yarn.
Claim 21
Dependent Claim
56 words
A triple-layer papermaking fabric as claimed in claim 18 wherein said first warp yarns weave under top weft yarns vertically stacked over said bottom weft yarns, and over alternate top weft yarns not stacked over bottom weft yarns, and wherein said second warp yarns weave over alternate top weft yarns not stacked over bottom weft yarns.
Claim 22
Dependent Claim
23 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said bottom weft yarns have a greater diameter than said top weft yarns.
Claim 23
Dependent Claim
20 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said first and second warp yarns have the same diameter.
Claim 24
Dependent Claim
21 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said first and second warp yarns have a non-round cross section.
Claim 25
Dependent Claim
19 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said bottom weft yarns have a non-round cross section.
Claim 26
Dependent Claim
19 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said top weft yarns have a non-round cross section.
Claim 27
Dependent Claim
25 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said first and second warp yarns and said top weft yarns have the same diameter.
Claim 28
Dependent Claim
30 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said top weft yarns, said bottom weft yarns, said first warp yarns and said second warp yarns are monofilament yarns.
Claim 29
Dependent Claim
18 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said top weft yarns are plied monofilament yarns.
Claim 30
Dependent Claim
18 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said bottom weft yarns are plied monofilament yarns.
Claim 31
Dependent Claim
17 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said top weft yarns are multifilament yarns.
Claim 32
Dependent Claim
17 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said bottom weft yarns are multifilament yarns.
Claim 33
Dependent Claim
31 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said top weft yarns, said bottom weft yarns, said first warp yarns and said second warp yarns are hydrolysis-resistant polyester yarns.
Claim 34
Dependent Claim
30 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said top weft yarns, said bottom weft yarns, said first warp yarns and said second warp yarns are polyamide yarns.
Claim 35
Dependent Claim
17 words
A triple-layer papermaking fabric as claimed in claim 16 wherein said bottom weft yarns are polyamide 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) | 1998-10-02 | 1999-04-03 | 1999-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-02 | 2003-04-03 | 2003-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-02 | 2007-04-03 | 2007-10-03 | $7700.00 | Window Closed / Lapsed |