Patent DE974702C successfully refreshed from Google Patents.
Patent US1826157A successfully refreshed from Google Patents.
US5204150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loop formation in on-machine-seamed press fabrics using yarns comprising mxd6 polyamide resin material
Assignee: Albany International Corp
•
Filing: 1989-08-17
•
Granted: 1993-04-20
•
Expires: 2009-08-17
Abstract
Abstract This disclosure describes a press fabric for use on papermaking and similar machines. The fabric is of the open-ended variety, and has loops at each end enabling it to be closed into endless form during installation on the machine by means of a pin seam. The machine-direction (MD) yarns, from which the loops are formed during the flat or endless weaving of the fabric, are coated multifilaments. The coating, either permanent, semi-permanent, or soluble, gives the multifilament a monofilament-like structure enabling good loop formation and stability. The use of multifilament yarn provides a fabric having improved elasticity in the machine direction, and a greater degree of compressibility, following the removal of a soluble coating material, than can be obtained using monofilament yarn.
Inventors
- 👤 Francis L. Davenport
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:55
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/08; D21F7/10; D21F1/00; D21F1/0027; D21F1/0054; D21F7/083; Y; Y10; Y10S; Y10S428/00; Y10S428/909; Y10T; Y10T428/00; Y10T428/19; Y10T428/192; Y10T428/249921; Y10T428/249922; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T442/00; Y10T442/30; Y10T442/3049; Y10T442/3179; Y10T442/3195; Y10T442/3203; Y10T442/322; Y10T442/3228; Y10T442/326; Y10T442/3276; Y10T442/3707; Y10T442/3724
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
155 words
An open-ended press fabric, for use on the press section of a papermaking or similar machine, and designed for pin-seam closure, comprising: a system of machine-direction (MD) yarns interwoven with a system of cross-machine direction (CD) yarns to form a woven base fabric, wherein said machine-direction (MD) yarns are composite yarns whose strands are extruded from MXD6 polyamide resin so that a coating will form on said machine-direction (MD) yarns when said woven base fabric is heat-set, forming a monofilament-like strand; a first end and a second end, said first end and said second end being joined to each other when said press fabric is installed on said papermaking or similar machine; and a plurality of loops, formed by said machine-direction (MD) yarns during the production of said open-ended press fabric, at said first end and said second end, to facilitate the joining of said first end to said second end by a pin seam.
Claim 2
Dependent Claim
155 words
An open-ended press fabric, for use on the press section of a papermaking or similar machine, and designed for pin-seam closure, comprising: a system of machine-direction (MD) yarns interwoven with a system of cross-machine direction (CD) yarns to form a woven base fabric, wherein said machine-direction (MD) yarns are composite yarns whose strands are extruded from MXD6 polyamide resin so that a coating will form on said machine-direction (MD) yarns when said woven base fabric is heat-set, forming a monofilament-like strand; a first end and a second end, said first end and said second end being joined to each other when said press fabric is installed on said papermaking or similar machine; and a plurality of loops, formed by said machine-direction (MD) yarns during the production of said open-ended press fabric, at said first end and said second end, to facilitate the joining of said first end to said second end by a pin seam.
Claim 3
Dependent Claim
22 words
An open-ended press fabric as claimed in claim 1 wherein said cross-machine direction (CD) yarns are also extruded from MXD6 polyamide resin.
Claim 4
Dependent Claim
22 words
An open-ended press fabric as claimed in claim 1 further comprising a batt of staple fibers needled into said woven base fabric.
Claim 5
Dependent Claim
17 words
An open-ended press fabric as claimed in claim 1 wherein said machine-direction (MD) yarns are multifilament yarns.
Claim 6
Dependent Claim
17 words
An open-ended press fabric as claimed in claim 1 wherein said machine-direction (MD) yarns are spun yarns.
Claim 7
Dependent Claim
25 words
An open-ended press fabric as claimed in claim 1 wherein said machine-direction (MD) yarns are multifilament yarns having a plurality of plied bundles of filaments.
Claim 8
Dependent Claim
18 words
An open-ended press fabric as claimed in claim 1 wherein said machine-direction (MD) yarns are plied monofilament yarns.
References Cited (Backward Citations)
US4151323A
Cited
US4119753A
Cited
US4315049A
Cited
US4532275A
Cited
US4695498A
Cited
US4433493A
Cited
US4439481A
Cited
US4482601A
Cited
US4520059A
Cited
US4489125A
Cited
US4533594A
Cited
US4877847A
Cited
US4764417A
Cited
US4798760A
Cited
US4830915A
Cited
US4893781A
Cited
US4911683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |