Patent US4189512A successfully refreshed from Google Patents.
US4189512A
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Staple fibre webs
Assignee: Imperial Chemical Industries Ltd
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Filing: 1978-07-03
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Granted: 1980-02-19
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Expires: 1998-07-03
Abstract
Abstract Very highly parallelized staple fibre webs are described and defined in terms of three parameters related to longitudinal and lateral cohesive properties. A process for the preparation of these webs is also described.
Inventors
- 👤 Peter M. Ellis
- 👤 Alan Selwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:13
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/70; D04H1/74; B; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C66/00; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; D04H1/40; D04H1/54; D04H1/541; B29C66/71; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T442/00; Y10T442/60; Y10T442/637; Y10T442/638; Y10T442/641
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
52 words
A highly ordered staple fibre web comprising a major proportion of synthetic thermoplastic fibres and having a fibre direction coherence of at least 1.0 g/cm per g/m 2 , a cross fibre direction coherence of less than 0.2 g/cm per g/m 2 and a tweezer separation distance of at least 5 cm.
Claim 2
Dependent Claim
52 words
A highly ordered staple fibre web comprising a major proportion of synthetic thermoplastic fibres and having a fibre direction coherence of at least 1.0 g/cm per g/m 2 , a cross fibre direction coherence of less than 0.2 g/cm per g/m 2 and a tweezer separation distance of at least 5 cm.
Claim 3
Dependent Claim
21 words
A web according to claim 1 wherein the cross fibre direction coherence is less than 0.1 g/cm per g/m 2 .
Claim 4
Dependent Claim
21 words
A web according to claim 1 wherein the cross fibre direction coherence is more than 0.02 g/cm per g/m 2 .
Claim 5
Dependent Claim
26 words
A web according to claim 1 wherein the product of tweezer separation distance in centimeters and the web weight in g/m 2 is at least 200.
Claim 6
Dependent Claim
17 words
A web according to claim 1 wherein the pin-hole diffraction pattern measured as hereinbefore described is bilobate.
Claim 7
Dependent Claim
20 words
A web according to claim 1 wherein at least some of the synthetic fibres are side-by-side or sheath/core bicomponent fibres.
Claim 8
Dependent Claim
20 words
A web according to claim 6 wherein the fibre direction coherence does not exceed 50 g/cm per g/m 2 .
Claim 9
Dependent Claim
20 words
A web according to claim 6 wherein the fibre direction coherence does not exceed 40 g/cm per g/m 2 .
References Cited (Backward Citations)
US2705687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |