US4141388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper machine dryer fabric
Assignee: Albany International Corp
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Filing: 1977-03-23
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Granted: 1979-02-27
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Expires: 1997-03-23
Abstract
Abstract The disclosure is of a multi-layer, flat woven, composite fabric having a duplex weave base of synthetic, polymeric resin monofilaments and a soft surface of multi-filament or spun yarns. The fabric is useful as a conventional dryer felt and may also be used as a hot air impingement dryer felt. The fabric is especially advantageous for dryer felts employed for the manufacture of fragile papers.
Inventors
- 👤 Eric R. Romanski
- 👤 Michael J. Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:33
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0036; D21F1/0054; Y; Y10; Y10S; Y10S162/00; Y10S162/902
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
47 words
A dryer felt, which comprises: a multi-layer, flat woven, composite fabric having a woven base of synthetic polymeric resin monofilaments and a soft surface of yarns which interweave with the monofilaments of the woven base to provide stitching points which secure the surface yarns to the base.
Claim 2
Dependent Claim
47 words
A dryer felt, which comprises: a multi-layer, flat woven, composite fabric having a woven base of synthetic polymeric resin monofilaments and a soft surface of yarns which interweave with the monofilaments of the woven base to provide stitching points which secure the surface yarns to the base.
Claim 3
Dependent Claim
29 words
The fabric of claim 1 wherein said yarns are selected from the goup consisting of yarns spun from polyester, polyamide, polyacrylic, wool or other staple fibers and mixtures thereof.
Claim 4
Dependent Claim
17 words
The fabric of claim 1 wherein said yarns are a mixture of acrylic and aramid staple fibers.
Claim 5
Dependent Claim
21 words
The fabric of claim 1 wherein said yarns have a size ranging from 100 grains to 3,000 grains per 100 yards.
Claim 6
Dependent Claim
20 words
The fabric of claim 1 wherein said monofilaments are selected from the group consisting of polyester, polyamide, polypropylene and polyimide.
Claim 7
Dependent Claim
20 words
The fabric of claim 1 wherein said monofilaments have a diameter in the range of from 0.008 to 0.004 inches.
Claim 8
Dependent Claim
42 words
The fabric of claim 1 having a density of warp yarns in the range of from 10 to 180 warp ends to the inch and a density of filling yarns in the range of from 10 to 60 picks to the inch.
Claim 9
Dependent Claim
10 words
The fabric of claim 1 wherein said yarns are multi-filaments.
Claim 10
Dependent Claim
19 words
The fabric of claim 1 wherein the ends are joined by a pin seam to form an endless belt.
Claim 11
Dependent Claim
23 words
The belt of claim 9 wherein said pin seam is covered by a flap of woven spun yarn continuous with said soft surface.
Claim 12
Dependent Claim
93 words
A dryer felt which comprises; a multi-layer, flat woven, binder free, composite fabric having a duplex weave base of interwoven polyester monofilament alternating with polyamide monofilament and a soft surface of interwoven spun yarns, said spun yarns consisting of a mixture of acrylic and aramid staple fibers covering said monofilaments; the density of the fabric being 48 ends to the inch of monofilament warp yarns, 24 ends to the inch of spun warp yarns, 25 picks to the inch of monofilament filling yarn and 121/2 picks to the inch of spun filling yarns.
Claim 13
Dependent Claim
93 words
A dryer felt which comprises; a multi-layer, flat woven, binder free, composite fabric having a duplex weave base of interwoven polyester monofilament alternating with polyamide monofilament and a soft surface of interwoven spun yarns, said spun yarns consisting of a mixture of acrylic and aramid staple fibers covering said monofilaments; the density of the fabric being 48 ends to the inch of monofilament warp yarns, 24 ends to the inch of spun warp yarns, 25 picks to the inch of monofilament filling yarn and 121/2 picks to the inch of spun filling yarns.
Claim 14
Dependent Claim
48 words
A dryer felt, which comprises: a multi-layer, flat woven, composite fabric having a duplex weave base of synthetic polymeric resin monofilaments and a soft surface of yarns which interweave with the monofilaments of the woven base to provide stitching points which secure the surface yarns to the base.
Claim 15
Dependent Claim
48 words
A dryer felt, which comprises: a multi-layer, flat woven, composite fabric having a duplex weave base of synthetic polymeric resin monofilaments and a soft surface of yarns which interweave with the monofilaments of the woven base to provide stitching points which secure the surface yarns to the base.
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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |