Patent US1809866A successfully refreshed from Google Patents.
Patent US4446187A successfully refreshed from Google Patents.
US4446187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet assembly and method of manufacturing same
Assignee: Nordiskafilt AB
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Filing: 1981-03-26
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Granted: 1984-05-01
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Expires: 2001-03-26
Abstract
Abstract The present invention relates to a sheet assembly with a permeability at least to gaseous media, as well as a method for manufacturing same. The object of the present invention is to produce a sheet assembly which may be used as a forming fabric, press fabric and/or drying fabric, including as a press felt or drying felt. This object is achieved in that a sheet assembly according to the present invention is characterized by a foil (1) of a substantially liquid impermeable material which is coordinated with a reinforcement structure (3) which is disposed wholly or partially within the foil (1) and is permeable to gas and possibly also to liquid, at least the foil (1) displaying substantially vertical through-channels (2).
Inventors
- 👤 Nils O. Eklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/08; D21F7/083; D21F1/00; D21F1/0027; D21F1/0036; D21F1/0063; Y; Y10; Y10S; Y10S162/00; Y10S162/90; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314; Y10T428/24322; Y10T428/24331; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
A sheet assembly for dewatering fiber webs comprising: a layer of substantially liquid-impermeable material in contact with said webs; and a reinforcing structure; said sheet having substantially vertical through-channels formed at least through said layer, said through-channels being adapted to lead water away from said fiber webs when the layer is placed in contact with said fiber webs.
Claim 2
Dependent Claim
58 words
A sheet assembly for dewatering fiber webs comprising: a layer of substantially liquid-impermeable material in contact with said webs; and a reinforcing structure; said sheet having substantially vertical through-channels formed at least through said layer, said through-channels being adapted to lead water away from said fiber webs when the layer is placed in contact with said fiber webs.
Claim 3
Dependent Claim
36 words
An sheet assembly according to claim 1, wherein said reinforcement structure is located on one side of said layer and is connected to said layer at least in the regions of the mouths of said channels.
Claim 4
Dependent Claim
16 words
An sheet assembly according to claim 1, comprising pores in the layer material between said channels.
Claim 5
Dependent Claim
18 words
An sheet assembly according to claim 1, wherein said reinforcement structure consists of a fabric of monofilament threads.
Claim 6
Dependent Claim
25 words
An sheet assembly according to claim 4, wherein said fabric is provided with fibres on at least the side facing one side of said layer.
Claim 7
Dependent Claim
31 words
A sheet assembly according to claim 4, wherein said fabric is provided with fibres at least on the side facing one side of said layer, said fibres needled to said fabric.
Claim 8
Dependent Claim
18 words
An sheet assembly according to claim 1, wherein said reinforcement structure consists of a fabric of multifilament threads.
Claim 9
Dependent Claim
25 words
An sheet assembly according to claim 7, wherein said fabric is provided with fibres on at least the side facing one side of said layer.
Claim 10
Dependent Claim
31 words
An sheet assembly according to claim 7, wherein said fabric is provided with fibres on at least the side facing one side of said layer, said fibres needled to said fabric.
References Cited (Backward Citations)
US3695988A
Cited
US4206258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |