EP0336876A2
Expired / Lapsed
EP
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A blanket for an extended nip press
Assignee: Beloit Technologies Inc
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Filing: 1989-04-06
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Granted: —
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Expires: 2009-04-06
Abstract
Abstract A blanket (10) is disclosed for an extended nip press (12) which includes a shoe (14) and a felt (16). The blanket (10) includes a band-shaped body (18) which defines an inner and an outer surface (20,22). The inner surface (20) is smooth for cooperation with the shoe (14) such that inner surface (20) slides relative to the shoe (14). The outer surface (22) cooperates with the felt (16) and the body (18) is fabricated from monocoque fiber-reinforced polyurethane instead of a laminate to inhibit delamination and creep of the body (18) during use of the blanket (10).
Inventors
- 👤 Paul Mccarten
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 17:30
CPC Classifications
D; D21; D21F; D21F3/00; D21F3/02; D21F3/0209; D21F3/0218; D21F3/0227; D21F3/0236; Y; Y10; Y10S; Y10S162/00; Y10S162/901
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
76 words
A blanket for an extended nip press which includes a shoe and a felt, said blanket comprising: a band-shaped body defining an inner and an outer surface; said inner surface being smooth for cooperation with the shoe such that said inner surface slides relative to said shoe; said outer surface cooperating with the felt, and said body being fabricated from monocoque fiber-reinforced polyurethane for inhibiting delamination and creep of said body during use of the blanket.
Claim 2
Dependent Claim
76 words
A blanket for an extended nip press which includes a shoe and a felt, said blanket comprising: a band-shaped body defining an inner and an outer surface; said inner surface being smooth for cooperation with the shoe such that said inner surface slides relative to said shoe; said outer surface cooperating with the felt, and said body being fabricated from monocoque fiber-reinforced polyurethane for inhibiting delamination and creep of said body during use of the blanket.
Claim 3
Dependent Claim
29 words
A blanket as set forth in claim 1 wherein said body encircles the shoe and defines a first edge and a second edge disposed parallel to said first edge.
Claim 4
Dependent Claim
44 words
A blanket as set forth in claim 1 wherein said inner surface is fluid impervious such that during use of the blanket, a flow of a lubricant disposed between the shoe and said inner surface through said body toward said outer surface is inhibited.
Claim 5
Dependent Claim
30 words
A blanket as set forth in claim 1 wherein said outer surface is machined such that the thickness of said body is uniform along the machine and cross-machine directions thereof.
Claim 6
Dependent Claim
44 words
A blanket as set forth in claim 1 wherein said outer surface defines a plurality of grooves for the reception therein of water removed from the felt during passage through the extended nip press, said grooves being parallel and spaced relative to each other.
Claim 7
Dependent Claim
32 words
A blanket as set forth in claim 5 wherein said grooves extend in a machine direction for facilitating flow of water removed from the felt during passage through the extended nip press.
Claim 8
Dependent Claim
18 words
A blanket as set forth in claim 5 wherein said grooves extend diagonally relative to the machine direction.
Claim 9
Dependent Claim
29 words
A blanket as set forth in claim 1 wherein the outer surface defines a plurality of blind drilled holes for the reception therein of water removed from the felt.
Claim 10
Dependent Claim
21 words
A blanket as set forth in claim 1 wherein said body is fabricated from a polyurethane having fibers randomly oriented therein.
Claim 11
Dependent Claim
23 words
A blanket as set forth in claim 1 wherein said fibers impart reinforcement to said polyurethane such that said body exhibits anisotropic properties.
Claim 12
Dependent Claim
52 words
A blanket as set forth in claim 10 wherein said anisotropic properties of said body permit flexure of said body in a machine direction during passage through the extended nip press while inhibiting closing of said grooves by cross-machine direction flexure of said body thereby maintaining the drainage capabilities of said grooves.
Claim 13
Independent Claim
99 words
A method of fabricating a blanket for an extended nip press which includes a shoe and a felt, said method including the steps of: saturating a fiber mat with polyurethane; wrapping the saturated mat around a smooth mandrel; heating the wrapped mandrel such that the polyurethane gels; further heating the wrapped mandrel within a heating oven for curing the polyurethane; cooling the cured mat which constitutes the blanket; grinding the blanket to a uniform thickness; grooving the outer surface of the blanket while the blanket is still supported on the mandrel; and removing the finished blanket from the mandrel.
Claim 14
Independent Claim
99 words
A method of fabricating a blanket for an extended nip press which includes a shoe and a felt, said method including the steps of: saturating a fiber mat with polyurethane; wrapping the saturated mat around a smooth mandrel; heating the wrapped mandrel such that the polyurethane gels; further heating the wrapped mandrel within a heating oven for curing the polyurethane; cooling the cured mat which constitutes the blanket; grinding the blanket to a uniform thickness; grooving the outer surface of the blanket while the blanket is still supported on the mandrel; and removing the finished blanket from the mandrel.
Claim 15
Dependent Claim
14 words
A method as set forth in claim 12 wherein the fiber mat is non-woven.
Claim 16
Dependent Claim
16 words
A method as set forth in claim 13 wherein the fiber mat is fabricated from KEVLAR.
Claim 17
Dependent Claim
18 words
A method as set forth in claim 12 wherein the saturated mat is spirally wrapped around the mandrel.
Claim 18
Dependent Claim
34 words
A method as set forth in claim 15 wherein the spirally-wound mat is overlapped during winding such that the mat attains a thickness which is greater than the required thickness of the finished blanket.
Claim 19
Dependent Claim
31 words
A method as set forth in claim 12 wherein the step of heating the saturated mat includes: rotating the wrapped mandrel in front of heating panels such that the polyurethane gels.
Claim 20
Dependent Claim
24 words
A method as set forth in claim 17 wherein the time taken for heating the wrapped mandrel is within the range of 1-3 hours.
Claim 21
Dependent Claim
30 words
A method as set forth in claim 12 wherein the step of further heating the wrapped mandrel is carried out at a temperature within the range of 82-121°C (180-250° Fahrenheit).
Claim 22
Dependent Claim
17 words
A method as set forth in claim 19 wherein the temperature is preferably approximately 100°C (212° Fahrenheit).
Claim 23
Dependent Claim
20 words
A method as set forth in claim 19 wherein the polyurethane is cured within a period of between 12-60 hours.
References Cited (Backward Citations)
No citation records indexed.
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