Patent CA1190779A successfully refreshed from Google Patents.
CA1190779A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Dewatering press
Assignee: Albany International Corp
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Filing: 1982-09-23
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Granted: 1985-07-23
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Expires: 2002-09-23
Abstract
Abstract ABSTRACT OF THE DISCLOSURE A press for dewatering fibrous webs including a nip provided by a roll and an endless belt forced toward the roll by a pressure shoe positioned adjacent thereto for applying pressure to the fibrous web in the nip through the medium of the belt. The belt has a base fabric impregnated with polymeric material to provide a first side which presents a uniform smooth impervious surface for engagement by the pressure shoe and a second side containing voids into which liquid can be transferred from the felt engaged thereby during the passage of the web, felt and belt through the nip.
Inventors
- 👤 William H. Dutt
- 👤 Thomas H. Curry
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-04 07:37
CPC Classifications
D; D21; D21F; D21F3/00; D21F3/02; D21F3/0209; D21F3/0218; D21F3/0227; B; B29; B29C; B29C67/00; B29C67/0044; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/504; B29C70/506; B30; B30B; B30B9/00; B30B9/02; B30B9/24; B30B9/247; B29K; B29K2313/00; B29L; B29L2031/00; B29L2031/733
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
124 words
A press for dewatering a fibrous web including: a press roll having a cylindrical exterior surface; a flexible belt; said belt comprising a base fabric impregnated with a polymeric material; a first side of said belt having a uniform smooth impervious surface; a nip provided by said press roll and said belt; papermakers felt means in said nip; a pressure shoe having an exterior surface engaging said first side of said belt and applying pressure to said belt means and fibrous web in said nip through the medium of said belt; and a second side of said belt containing voids into which liquid is transferred from the felt means engaged thereby during the passage of the web, felt means and belt through the nip.
Claim 2
Dependent Claim
124 words
A press for dewatering a fibrous web including: a press roll having a cylindrical exterior surface; a flexible belt; said belt comprising a base fabric impregnated with a polymeric material; a first side of said belt having a uniform smooth impervious surface; a nip provided by said press roll and said belt; papermakers felt means in said nip; a pressure shoe having an exterior surface engaging said first side of said belt and applying pressure to said belt means and fibrous web in said nip through the medium of said belt; and a second side of said belt containing voids into which liquid is transferred from the felt means engaged thereby during the passage of the web, felt means and belt through the nip.
Claim 3
Dependent Claim
20 words
A press as claimed in claim 1, wherein said im-pregnant is substantially 100% solid composition as impregnated into the belt.
Claim 4
Dependent Claim
23 words
A press as claimed in claim 1, wherein said base fabric is a multilayer fabric with a non-face layer of stuffer barrier yarns.
Claim 5
Dependent Claim
23 words
A press as claimed in claim 2, wherein said base fabric is a multilayer fabric with a non-face layer of stuffer barrier yarns.
Claim 6
Dependent Claim
22 words
A press as claimed in claim 1, wherein said im-pregnant is substantially 100% solid polyurethane resin composition as impregnated into the belt.
Claim 7
Dependent Claim
15 words
A press as claimed in claims 1 or 2, wherein said base fabric is woven.
Claim 8
Dependent Claim
28 words
A press as claimed in claims 3 or 4, wherein the said base fabric is monofilament with the exception of the stuffer yarns which are multifilament or spun.
Claim 9
Independent Claim
64 words
A method for manufacturing an endless belt for use in an extended press nip comprising: providing an endless base fabric; coating and impregnating said base fabric by doc-toring into the fabric a polymeric resin from one face curing said resin to form a smooth surface; and providing means to limit the flow of impregnant through the base to create voids on the second face.
Claim 10
Independent Claim
64 words
A method for manufacturing an endless belt for use in an extended press nip comprising: providing an endless base fabric; coating and impregnating said base fabric by doc-toring into the fabric a polymeric resin from one face curing said resin to form a smooth surface; and providing means to limit the flow of impregnant through the base to create voids on the second face.
Claim 11
Dependent Claim
34 words
A method for manufacturing an endless belt in accordance with claim 8, wherein the means to limit the flow of impregnant includes stuffer yarns providing a barrier to flow of the polymeric material therethrough.
Claim 12
Dependent Claim
37 words
A method for manufacturing an endless belt in accordance with claim 8, wherein the structure of the base fabric is selected to provide voids in the face of the fabric away from the face receiving the impregnant.
References Cited (Backward Citations)
No citation records indexed.
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