US5071697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure for extracting water from a paper web in a papermaking process
Assignee: Appleton Mills
•
Filing: 1990-01-22
•
Granted: 1991-12-10
•
Expires: 2010-01-22
Abstract
Abstract A composite structure for extracting water from a wet paper web in a papermaking process. The structure includes a base or substrate and a layer of water permeable polymeric foam, such as polyurethane foam, is secured to a surface of the substrate and an outer web supporting layer of water permeable polymeric material is bonded to the outer surface of the foam layer. The outer polymeric layer provides a smooth web supporting surface having toughness and abrasion resistance.
Inventors
- 👤 Thomas G. Gulya
- 👤 Michael C. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:06
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B32B27/00; B32B27/06; B32B27/065; B32B5/02; B32B5/024; B32B5/22; B32B5/24; B32B5/245; D; D21; D21F; D21F7/00; D21F7/08; D21F7/083; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2305/00; B32B2305/10; B32B2305/18; B32B2305/188; B32B2305/38; B32B2307/00; B32B2307/70; B32B2307/726; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T442/00; Y10T442/10; Y10T442/184; Y10T442/195
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
61 words
A structure to support a paper web in a papermaking process, comprising a substrate, a layer of water permeable polymeric foam having a first surface secured to said substrate, and a tough, flexible, thin outer layer of water permeable polymeric film bonded to a second surface of said foam layer and disposed to support a paper web in a papermaking process.
Claim 2
Dependent Claim
61 words
A structure to support a paper web in a papermaking process, comprising a substrate, a layer of water permeable polymeric foam having a first surface secured to said substrate, and a tough, flexible, thin outer layer of water permeable polymeric film bonded to a second surface of said foam layer and disposed to support a paper web in a papermaking process.
Claim 3
Dependent Claim
17 words
The structure of claim 1, wherein said outer layer has a thickness of 1 to 40 mils.
Claim 4
Dependent Claim
16 words
The structure of claim 1, wherein the outer layer is composed of a crosslinkable thermoplastic resin.
Claim 5
Dependent Claim
16 words
The structure of claim 1, wherein the outer layer is composed of spun bonded polymeric fibers.
Claim 6
Dependent Claim
27 words
The structure of claim 1, wherein said outer layer has a multiplicity of pores distributed in a regular pattern over the surface of the said outer layer.
Claim 7
Dependent Claim
12 words
The structure of claim 1, wherein said substrate comprises a needled fabric.
Claim 8
Dependent Claim
12 words
The structure of claim 1, wherein said substrate comprises a woven fabric.
Claim 9
Dependent Claim
12 words
The structure of claim 1, wherein said substrate comprises extruded synthetic mesh.
Claim 10
Dependent Claim
18 words
The structure of claim 1, wherein said foam layer comprises polyurethane foam having a multiplicity of interconnected cells.
Claim 11
Dependent Claim
118 words
A structure to support a paper web in a papermaking process as the structure and the web are subjected to a compressive stress to thereby extract water from said web and flow the extracted water through said structure, comprising a substrate, a layer of water permeable polymeric foam secured to a surface of the substrate and having a plurality of interconnected cells, and a flexible tough outer layer of water permeable polymeric material bonded to said foam layer and having a thickness in the range of 1 to 40 mils, said outer layer having a water permeability such that back flow of water from said structure to said web on release of said compressive stress is substantially prevented.
Claim 12
Dependent Claim
118 words
A structure to support a paper web in a papermaking process as the structure and the web are subjected to a compressive stress to thereby extract water from said web and flow the extracted water through said structure, comprising a substrate, a layer of water permeable polymeric foam secured to a surface of the substrate and having a plurality of interconnected cells, and a flexible tough outer layer of water permeable polymeric material bonded to said foam layer and having a thickness in the range of 1 to 40 mils, said outer layer having a water permeability such that back flow of water from said structure to said web on release of said compressive stress is substantially prevented.
Claim 13
Dependent Claim
19 words
The structure of claim 10, wherein said outer layer comprises a sheet having a multiplicity of pores extending therethrough.
Claim 14
Dependent Claim
23 words
The structure of claim 10, wherein the water permeability of said outer layer is less than the water permeability of said foam layer.
References Cited (Backward Citations)
US3059312A
Cited
US3617442A
Cited
US3772746A
Cited
US4271222A
Cited
US4446187A
Cited
US4369081A
Cited
US4357386A
Cited
US4469740A
Cited
US4636424A
Cited
US4701368A
Cited
US4795480A
Cited
US4902565A
Cited
US4830905A
Cited
US4961974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-09 | 1995-06-10 | 1995-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-09 | 1999-06-10 | 1999-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-09 | 2003-06-10 | 2003-12-10 | $7700.00 | Window Closed / Lapsed |