Patent US4482601A successfully refreshed from Google Patents.
US4482601A
Expired / Lapsed
US
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Wet press papermakers felt and method of fabrication
Assignee: Albany International Corp
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Filing: 1983-05-31
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Granted: 1984-11-13
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Expires: 2003-05-31
Abstract
Abstract The disclosure is of a method of preparing a papermakers wet press felt fabric, felts made therefrom and their use, as wet press felts on papermaking machines. By the method of the invention, there is obtained a method of making a papermaker's press felt harder and denser while at the same time maintaining a high level of void volume and permeability in a loaded nip of a paper machine press.
Inventors
- 👤 Richard J. Hartigan, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:28
CPC Classifications
D; D04; D04H; D04H13/00; D04H13/001; D04H13/003; B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; B32B5/022; B32B5/024; D21; D21F; D21F7/00; D21F7/08; D21F7/083; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3707; Y10T442/3724; Y10T442/3756
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
An intermediate wet-press felt fabric, which comprises: a first layer of interwoven machine direction and cross-machine direction yarns; and a second layer of non-woven staple fibers, needled to the first layer; said staple fibers including a proportion of solvent removable fibers and a proportion of solvent resistant fibers.
Claim 2
Dependent Claim
48 words
An intermediate wet-press felt fabric, which comprises: a first layer of interwoven machine direction and cross-machine direction yarns; and a second layer of non-woven staple fibers, needled to the first layer; said staple fibers including a proportion of solvent removable fibers and a proportion of solvent resistant fibers.
Claim 3
Independent Claim
111 words
A method of manufacturing a wet press papermakers felt fabric, which comprises: providing textile components of a wet press fabric; providing a solvent removable material, which is compatible with the textile components in a fabric structure, and which is a granular or particulate form of a chemical compound; assembling the textile components and the solvent removable material into the form of a wet press fabric wherein the solvent removable material is mixed and homogeneously disbursed in the textile components; compacting the formed fabric to increase the overall density of the fabric; and dissolving the solvent removable material; whereby voids are formed in the fabric where the solvent removable material is dissolved.
Claim 4
Independent Claim
111 words
A method of manufacturing a wet press papermakers felt fabric, which comprises: providing textile components of a wet press fabric; providing a solvent removable material, which is compatible with the textile components in a fabric structure, and which is a granular or particulate form of a chemical compound; assembling the textile components and the solvent removable material into the form of a wet press fabric wherein the solvent removable material is mixed and homogeneously disbursed in the textile components; compacting the formed fabric to increase the overall density of the fabric; and dissolving the solvent removable material; whereby voids are formed in the fabric where the solvent removable material is dissolved.
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) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |