US4815503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric for the sheet forming section of a papermaking machine
Assignee: Herman Wangner GmbH and Co KG
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Filing: 1987-10-06
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Granted: 1989-03-28
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Expires: 2007-10-06
Abstract
Abstract A fabric for the sheet forming section of a papermaking machine includes a double-layer or multi-layer fabric of interwoven longitudinal and transverse threads and additional transverse threads floating on the paper side. The additional transverse threads have a greater repeat length than the ordinary transverse threads and alternatingly float in one weave repeat on the paper side, while in the next weave repeat they are interwoven in the fabric interior. The additional transverse threads preferably have a smaller diameter than the ordinary transverse threads.
Inventors
- 👤 Georg Borel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:27
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0036; Y; Y10; Y10S; Y10S162/00; Y10S162/903
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
A fabric for the sheet forming section of a papermaking machine comprising a double-layer fabric of conventional longitudinal and transverse threads interwoven in a repeating weave pattern, and additional transverse threads floating on the paper side, wherein said additional transverse threads have a repeat length twice the repeat length of the conventional transverse threads, and wherein the additional transverse threads alternately float in substantially the first half of the repeat length on the paper side and extend in the fabric interior for substantially the second half of the repeat length.
Claim 2
Dependent Claim
90 words
A fabric for the sheet forming section of a papermaking machine comprising a double-layer fabric of conventional longitudinal and transverse threads interwoven in a repeating weave pattern, and additional transverse threads floating on the paper side, wherein said additional transverse threads have a repeat length twice the repeat length of the conventional transverse threads, and wherein the additional transverse threads alternately float in substantially the first half of the repeat length on the paper side and extend in the fabric interior for substantially the second half of the repeat length.
Claim 3
Dependent Claim
67 words
A fabric according to claim 1, wherein the additional transverse threads are interwoven in pairs with one of the additional transverse threads of each pair floating on the paper side while the other transverse thread of said pair extends in the fabric interior and wherein the course of the two additional transverse threads is exchanged after substantially half of the weave repeat of the additional transverse threads.
Claim 4
Dependent Claim
24 words
A fabric according to claim 1 wherein said additional transverse threads have a smaller diameter than the ordinary transverse threads on the paper side.
Claim 5
Dependent Claim
34 words
A fabric according to claim 1, wherein the additional transverse threads consist of a material having an elastic modulus not greater than the elastic modulus of the ordinary transverse threads on the paper side.
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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |