US4863786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Papermachine clothing
Assignee: Voith Fabrics Heidenheim GmbH and Co KG
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Filing: 1988-03-28
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Granted: 1989-09-05
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Expires: 2008-03-28
Abstract
Abstract The invention is concerned with a base fabric for use in the manufacture of a papermachine press-felt, the base fabric comprising a multi-layer endless woven fabric wherein the machine direction yarns of at least one fabric layer form interdigitated weft loops having a warp yarn therein, and thus define a seam, and wherein at least one further fabric layer exists. The further layer or layers may be continuous throughout the full longitudinal extent of the multilayer fabric, and are slit along the line of the seam after needling of a batt to the base fabric, or may be broken and the weft yarns woven tight about an extreme warp yarn.
Inventors
- 👤 Alan Green
- 👤 Brian Riley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:16
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/08; D21F7/083; D21F1/00; D21F1/0027; D21F1/0036; D21F7/10; Y; Y10; Y10S; Y10S162/00; Y10S162/90; Y10S162/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249922; Y10T428/249923; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/348; Y10T442/3488
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
81 words
A base fabric for use in the construction of papermachine clothing, said base fabric comprising: circular woven warp and weft yarns forming an endless-woven, multilayer fabric, weft yarns of at least one fabric layer of said multilayer fabric defining interdigitated weft loops having a jointing wire therein and said multilayer fabric including at least one further fabric layer in addition to said at least one fabric layer, weft yarns of said at least one further fabric layer include said weft loops.
Claim 2
Dependent Claim
81 words
A base fabric for use in the construction of papermachine clothing, said base fabric comprising: circular woven warp and weft yarns forming an endless-woven, multilayer fabric, weft yarns of at least one fabric layer of said multilayer fabric defining interdigitated weft loops having a jointing wire therein and said multilayer fabric including at least one further fabric layer in addition to said at least one fabric layer, weft yarns of said at least one further fabric layer include said weft loops.
Claim 3
Dependent Claim
18 words
A base fabric as claimed in claim 1, wherein each said further fabric layer is a continuous layer.
Claim 4
Dependent Claim
97 words
A base fabric as claimed in claim 1, further comprising loops of said multilayer fabric engaged by a common warp yarn, said loops being formed by longitudinally extending yarns existing at a first fabric surface, said at least one further fabric layer includes further longitudinally extending yarns existing at a second fabric surface, being a surface opposite to said first fabric surface, said further yarns being woven tight about transversely extending yarns at said second surface and located generally in register with said warp yarns, said further longitudinally extending yarns being weft yarns of the woven fabric.
Claim 5
Dependent Claim
21 words
A base fabric as claimed in claim 3, wherein the said further longitudinally extending yarns are woven two in a shed.
Claim 6
Dependent Claim
21 words
A base fabric as claimed in claim 1, wherein the longitudinally extending yarns of the further fabric layer comprise multifilament yarns.
Claim 7
Dependent Claim
12 words
A base fabric as claimed in claim 1, comprising a three-layer fabric.
Claim 8
Dependent Claim
12 words
A papermachine fabric as claimed in claim 1 including a base fabric.
Claim 9
Dependent Claim
22 words
A papermachine fabric as claimed in claim 7, further including a textile batt needled to a surface of the woven multi-layer fabric.
Claim 10
Dependent Claim
22 words
A papermachine fabric as claimed in claim 8, wherein said textile batt is applied to the surface of the further fabric layer.
Claim 11
Dependent Claim
22 words
A papermachine fabric as claimed in claim 8, further including a textile batt needled to the other surface of the multi-layer fabric.
Claim 12
Dependent Claim
27 words
A papermachine fabric as claimed in claim 8, wherein each textile batt, and any continuous further fabric layer, is slit parallel to and adjacent the interdigitated loops.
Claim 13
Dependent Claim
30 words
A papermachine fabric as claimed in claim 8, wherein each said textile batt, and any continuous further fabric layer, is slit in slightly offset disposition relative to the interdigitated loops.
Claim 14
Dependent Claim
81 words
A base fabric for use in the manufacture of papermachine clothing, said base fabric having a cross-machine direction and a machine direction, said base fabric comprising: circular woven warp and weft yarns respectively extending in the cross-machine and machine direction to form an endless, multilayer structure, the machine direction yarns of at least one fabric layer form interdigitated loops about a common warp yarn and including at least one further fabric layer in addition to said at least one fabric layer.
Claim 15
Dependent Claim
81 words
A base fabric for use in the manufacture of papermachine clothing, said base fabric having a cross-machine direction and a machine direction, said base fabric comprising: circular woven warp and weft yarns respectively extending in the cross-machine and machine direction to form an endless, multilayer structure, the machine direction yarns of at least one fabric layer form interdigitated loops about a common warp yarn and including at least one further fabric layer in addition to said at least one fabric layer.
Claim 16
Dependent Claim
40 words
A papermakers press felt comprising a base fabric as claimed in claim 13, further including a textile batt needled to a surface of said base fabric and a slit in the batt in approximate register with said common weft 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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |