Patent US4657806A successfully refreshed from Google Patents.
US4657806A
Expired / Lapsed
US
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Wet press papermakers felt
Assignee: Albany International Corp
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Filing: 1985-03-25
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Granted: 1987-04-14
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Expires: 2005-03-25
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 papermakers press felt of controlled porosity while at the same time maintaining a high level of void volume and permeability in a loaded nip of a paper machine press.
Inventors
- 👤 William H. Dutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:20
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/08; D21F7/083; D21F1/00; D21F1/0027; D21F1/0063; Y; Y10; Y10S; Y10S428/00; Y10S428/909; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T442/00; Y10T442/20; Y10T442/2139; Y10T442/2369; Y10T442/273
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
77 words
A papermakers wet-press felt, which comprses: a base layer, which comprises a woven fabric of interwoven machine and cross-machine direction textile yarns; and a top layer coated on the base layer, said coating comprising a resilient, water-resistant, elastomeric, non-cellular, synthetic polymeric resin bonded to the base layer; said resin coating being characterized in part by homogeneously distributed voids and being water permeable by virtue of a plurality of channels penetrating the body of the coating top layer.
Claim 2
Dependent Claim
77 words
A papermakers wet-press felt, which comprses: a base layer, which comprises a woven fabric of interwoven machine and cross-machine direction textile yarns; and a top layer coated on the base layer, said coating comprising a resilient, water-resistant, elastomeric, non-cellular, synthetic polymeric resin bonded to the base layer; said resin coating being characterized in part by homogeneously distributed voids and being water permeable by virtue of a plurality of channels penetrating the body of the coating top layer.
Claim 3
Dependent Claim
11 words
The felt of claim 1 wherein said yarns are monofilament yarns.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |