Patent US1408488A successfully refreshed from Google Patents.
Patent US4229253A successfully refreshed from Google Patents.
US4229253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extended nip press with special belt reinforcement
Assignee: Beloit Technologies Inc
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Filing: 1979-04-26
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Granted: 1980-10-21
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Expires: 1999-04-26
Abstract
Abstract A press section for extracting water from a continuous traveling web in which the web is sandwiched between a traveling belt and a drum. The belt is wrapped partially about the drum and a pressure shoe exerts pressure on the belt in the wrap area to press the web. The belt includes a reinforcing structure extending circumferentially thereof and disposed locally within the shoe area of the press section.
Inventors
- 👤 Dennis C. Cronin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:39
CPC Classifications
D; D21; D21F; D21F3/00; D21F3/02; D21F3/0209; D21F3/0218; D21F3/0227; Y; Y10; Y10S; Y10S162/00; Y10S162/901
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
150 words
An extended nip press for removing water from a moving web of material, said press comprising: a rotatable roll having a cylindrical outer pressing surface; a flexible endless belt trained about a plurality of pulleys such that said belt turns about the pressing surface of said roll over an arc of contact; at least one movable felt means trained about said roll between said belt and said roll for carrying said web of material between said belt and said roll; a pressure shoe disposed on the side of said belt opposite said roll and adjacent said arc of contact, said shoe terminating in lateral directions substantially short of the lateral edges of said belt; and a reinforcing structure in said belt extending circumferentially thereof and having its lateral edges disposed within the lateral edges of said shoe so that said belt is substantially free of any bulging adjacent said shoe.
Claim 2
Dependent Claim
150 words
An extended nip press for removing water from a moving web of material, said press comprising: a rotatable roll having a cylindrical outer pressing surface; a flexible endless belt trained about a plurality of pulleys such that said belt turns about the pressing surface of said roll over an arc of contact; at least one movable felt means trained about said roll between said belt and said roll for carrying said web of material between said belt and said roll; a pressure shoe disposed on the side of said belt opposite said roll and adjacent said arc of contact, said shoe terminating in lateral directions substantially short of the lateral edges of said belt; and a reinforcing structure in said belt extending circumferentially thereof and having its lateral edges disposed within the lateral edges of said shoe so that said belt is substantially free of any bulging adjacent said shoe.
Claim 3
Dependent Claim
20 words
A press as claimed in claim 1 wherein said reinforcing structure comprises at least one ply of circumferentially extending cords.
Claim 4
Dependent Claim
20 words
A press as claimed in claim 1 wherein said reinforcing structure comprises at least one ply of helically wound cords.
Claim 5
Dependent Claim
25 words
A press as claimed in claim 2 wherein the portions of said belt disposed laterally outwardly of said shoe are free of cord reinforcing material.
Claim 6
Dependent Claim
30 words
A press as claimed in claim 2 wherein the portions of said belt disposed laterally outwardly of said shoe are free of cord reinforcing material which can resist longitudinal tension.
Claim 7
Dependent Claim
97 words
In a press of the type for removing water from a moving web of material and including a rotatable press roll, a flexible endless belt trained about an arc of said roll and an arcuate pressure shoe adjacent said roll, said shoe terminating in lateral directions substantially short of the lateral edges of said belt, the improvement comprising: a reinforcing structure in said belt extending circumferentially thereof with the lateral width and location of the reinforcing structure limited to the area of said shoe so that said belt is substantially free of any bulging adjacent said shoe.
Claim 8
Dependent Claim
97 words
In a press of the type for removing water from a moving web of material and including a rotatable press roll, a flexible endless belt trained about an arc of said roll and an arcuate pressure shoe adjacent said roll, said shoe terminating in lateral directions substantially short of the lateral edges of said belt, the improvement comprising: a reinforcing structure in said belt extending circumferentially thereof with the lateral width and location of the reinforcing structure limited to the area of said shoe so that said belt is substantially free of any bulging adjacent said shoe.
Claim 9
Dependent Claim
19 words
The improvement claimed in claim 6 wherein said reinforcing structure extends to the lateral edges of said shoe area.
Claim 10
Dependent Claim
14 words
The improvement claimed in claim 6 wherein said reinforcing structure comprises circumferentially extending cords.
Claim 11
Dependent Claim
24 words
The improvement claimed in claim 8 wherein the portions of said belt disposed laterally outwardly of said shoe are free of cord reinforcing structure.
Claim 12
Dependent Claim
29 words
The improvement claimed in claim 8 wherein the portions of said belt disposed laterally outwardly of said shoe are free of cord reinforcing structure which can resist longitudinal tension.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |