US4149571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Papermaking fabrics
Assignee: Huyck Licensco Inc
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Filing: 1978-03-03
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Granted: 1979-04-17
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Expires: 1998-03-03
Abstract
Abstract Improved paper forming and tissue transfer fabrics having enhanced stability and stretch resistance as well as improved bicrimp configuration, the fabrics being characterized by the alternate use of very high modulus and very low modulus yarns in the machine direction of the fabrics, the alternate very high and very low modulus yarns being woven using either pick and pick or two picks in a shed weaving techniques, the very high modulus yarns having an initial (1%) modulus greater than 2.0 gpd and the very low modulus yarns having an initial (1%) modulus of 0.2 to 0.8 gpd.
Inventors
- 👤 Ralph H. Burroughs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:17
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
A papermaking fabric having interwoven machine direction and cross-machine direction yarns, said machine direction yarns being formed from interspersed very high modulus yarns having an initial (1%) modulus greater than 2.0 gpd and very low modulus yarns having an initial (1%) modulus of from 0.2 to 0.8 gpd, said very high modulus machine direction yarns characterized by exhibiting low elongation under load, and said very low modulus machine direction yarns characterized by being deformable and exhibiting high elongation under load.
Claim 2
Dependent Claim
80 words
A papermaking fabric having interwoven machine direction and cross-machine direction yarns, said machine direction yarns being formed from interspersed very high modulus yarns having an initial (1%) modulus greater than 2.0 gpd and very low modulus yarns having an initial (1%) modulus of from 0.2 to 0.8 gpd, said very high modulus machine direction yarns characterized by exhibiting low elongation under load, and said very low modulus machine direction yarns characterized by being deformable and exhibiting high elongation under load.
Claim 3
Dependent Claim
25 words
The papermaking fabric claimed in claim 1 wherein said very high and very low modulus machine direction yarns lie in a pick and pick relationship.
Claim 4
Dependent Claim
27 words
The papermaking fabric claimed in claim 1 wherein said very high and very low modulus machine direction yarns lie in a two pick in a shed relationship.
Claim 5
Dependent Claim
23 words
The papermaking fabric claimed in claim 1 wherein said very high modulus machine direction yarns are buried beneath the surfaces of the fabric.
Claim 6
Dependent Claim
31 words
The papermaking fabric claimed in claim 4 wherein said fabric comprises a forming fabric, and wherein said cross-machine direction yarns have an initial (1%) modulus of from 0.9 to 1.2 gpd.
Claim 7
Dependent Claim
39 words
The papermaking fabric claimed in claim 4 wherein said fabric comprises a transfer fabric characterized by very high modulus machine direction yarns having high heat resistance, and by cross-machine direction yarns having an initial (1%) modulus below 0.9 gpd.
Claim 8
Dependent Claim
19 words
The papermaking fabric claimed in claim 6 wherein said very high modulus machine direction yarns comprise an aramid resin.
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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |