US4229254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extended nip press with bias ply reinforced belt
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 such as paper 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 having two plies of cords extending in cross bias layers with one ply extending laterally beyond one side of the shoe area and the other ply extending laterally beyond the other side of the shoe area. The foregoing abstract is not to be taken as limiting the invention of this application, and in order to understand the full nature and extent of the technical disclosure of this application, reference must be made to the accompanying drawings and the following detailed description.
Inventors
- 👤 Michael L. Gill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:12
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; D; D21; D21F; D21F3/00; D21F3/02; D21F3/0209; D21F3/0218; B32B5/02; B32B5/12; D21F3/0227; B32B2433/00; Y; Y10; Y10S; Y10S162/00; Y10S162/901
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
239 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, said reinforcing structure comprising a first ply of parallel cord fabric having its cords extending at a first angle no greater than 25° with respect to the longitudinal direction and a second ply of parallel cord fabric having is cords extending at a second angle equal in magnitude but opposite in direction with respect to the longitudinal direction, said first ply and said second ply forming an overlapped portion which is limited in lateral directions substantially to the area of said shoe so that the portions of said belt laterally outside the area of said shoe are free of cross ply shearing layers and said belt is substantially free of any bulging adjacent said shoe.
Claim 2
Dependent Claim
239 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, said reinforcing structure comprising a first ply of parallel cord fabric having its cords extending at a first angle no greater than 25° with respect to the longitudinal direction and a second ply of parallel cord fabric having is cords extending at a second angle equal in magnitude but opposite in direction with respect to the longitudinal direction, said first ply and said second ply forming an overlapped portion which is limited in lateral directions substantially to the area of said shoe so that the portions of said belt laterally outside the area of said shoe are free of cross ply shearing layers and said belt is substantially free of any bulging adjacent said shoe.
Claim 3
Dependent Claim
18 words
An extended nip press as claimed in claim 1 wherein said first angle is between 10° and 25°.
Claim 4
Dependent Claim
16 words
An extended nip press as claimed in claim 2 wherein said first angle is about 15°.
Claim 5
Dependent Claim
44 words
An extended nip press as claimed in claim 1 wherein one lateral edge of said first ply extends laterally outwardly to one edge of the belt and a lateral edge of said second ply extends laterally outwardly to the other edge of said belt.
Claim 6
Dependent Claim
22 words
An extended nip press as claimed in claim 1 wherein said overlap portion extends laterally substantially throughout the width of said shoe.
Claim 7
Dependent Claim
36 words
An extended nip press as claimed in claim 1 further including a single layer of 0° cords extending circumferentially about the belt, said layer extending laterally over the central 1/4 to 3/4 of said shoe area.
Claim 8
Dependent Claim
22 words
An extended nip press as claimed in claim 6 wherein said 0° cords extend over the central 1/2 of said shoe area.
Claim 9
Dependent Claim
182 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, said reinforcing structure comprising a first ply of parallel cord fabric having its cords extending at a first angle no greater than 25° with respect to the longitudinal direction and a second ply of parallel cord fabric having its cords extending at a second angle equal in magnitude but opposite in direction with respect to the longitudinal direction, said first ply and said second ply forming an overlapped portion which is limited in lateral directions substantially to the area of said shoe so that the portions of said belt laterally outside the area of said shoe are free of cross ply shearing layers and said belt is substantially free of any bulging adjacent said shoe.
Claim 10
Dependent Claim
182 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, said reinforcing structure comprising a first ply of parallel cord fabric having its cords extending at a first angle no greater than 25° with respect to the longitudinal direction and a second ply of parallel cord fabric having its cords extending at a second angle equal in magnitude but opposite in direction with respect to the longitudinal direction, said first ply and said second ply forming an overlapped portion which is limited in lateral directions substantially to the area of said shoe so that the portions of said belt laterally outside the area of said shoe are free of cross ply shearing layers and said belt is substantially free of any bulging adjacent said shoe.
Claim 11
Dependent Claim
16 words
The improvement as claimed in claim 8 wherein said first angle is between 10° and 25°.
Claim 12
Dependent Claim
16 words
An extended nip press as claimed in claim 9 wherein said first angle is about 15°.
Claim 13
Dependent Claim
42 words
The improvement as claimed in claim 8 wherein one lateral edge of said first ply extends laterally outwardly to one edge of the belt and a lateral edge of said second ply extends laterally outwardly to the other edge of said belt.
Claim 14
Dependent Claim
20 words
The improvement as claimed in claim 8 wherein said overlap portion extends laterally substantially throughout the width of said shoe.
Claim 15
Dependent Claim
34 words
The improvement as claimed in claim 8 further including a single layer of 0° cords extending circumferentially about the belt, said layer extending laterally over the central 1/4 to 3/4 of said shoe area.
Claim 16
Dependent Claim
20 words
The improvement as claimed in claim 13 wherein said 0° cords extend over the central 1/2 of said shoe area.
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 |