Patent US3561658A successfully refreshed from Google Patents.
US3561658A
Expired / Lapsed
US
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Nip roll assembly
Assignee: FMC Corp
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Filing: 1968-09-27
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Granted: 1971-02-09
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Expires: 1988-09-27
Abstract
Abstract A nip roll assembly including a guide roll and a longitudinally arcuate pressure roll which together provide a nip into and through which a web is adapted to travel, with the curvature of the arcuate pressure roll being adjustable to vary the degree of nipping provided by such rolls at selected locations longitudinally thereof.
Inventors
- 👤 Henry J Mcdermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:00
CPC Classifications
D; D06; D06F; D06F61/00; D06F61/02; D06C; D06C15/00; D06C15/02; D21; D21G; D21G1/00; D21G1/002; D21G1/0026
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
A nip roll assembly including a guide roll having a cylindrical surface and an arcuate pressure roll which together provide a nip into and through which a web is adapted to travel, said pressure roll including a longitudinal shaft, an elastic cylindrical sheath surrounding said shaft in spaced relationship therewith and forming the working face of said pressure roll, and bearing means mounted on said shaft within said sheatH for supporting said sheath for rotation relative to said shaft, means including aligned bearings supporting said guide roll for rotation, means supporting the ends of said shaft, and means for moving the ends of said shaft toward and away from each other for adjusting said shaft and the pressure roll sheath supported thereon to a desired curvature providing nipping between said guide and arcuate pressure rolls substantially across the entire length of said pressure roll.
Claim 2
Dependent Claim
144 words
A nip roll assembly including a guide roll having a cylindrical surface and an arcuate pressure roll which together provide a nip into and through which a web is adapted to travel, said pressure roll including a longitudinal shaft, an elastic cylindrical sheath surrounding said shaft in spaced relationship therewith and forming the working face of said pressure roll, and bearing means mounted on said shaft within said sheatH for supporting said sheath for rotation relative to said shaft, means including aligned bearings supporting said guide roll for rotation, means supporting the ends of said shaft, and means for moving the ends of said shaft toward and away from each other for adjusting said shaft and the pressure roll sheath supported thereon to a desired curvature providing nipping between said guide and arcuate pressure rolls substantially across the entire length of said pressure roll.
Claim 3
Dependent Claim
79 words
An assembly as defined in claim 1 wherein said means for supporting said guide roll includes a pair of laterally spaced, vertical members and wherein said means for supporting the ends of said shaft includes a pair of pivot arms between and through which said shaft extends and means hinging each of said arms at one end thereof to said vertical members so that the arcuate pressure roll is urged toward the guide roll under the force of gravity.
Claim 4
Dependent Claim
72 words
An assembly as defined in claim 2 wherein said means for adjusting the curvature of the pressure roll shaft and elastic sheath includes a self-adjusting bearing mounting one end of said shaft to an adjacent pivot arm, a bearing on the other end of said shaft located outwardly of the pivot arm adjacent thereto, and means for moving said last-mentioned bearing toward and away from the pivot arm which is adjacent thereto.
References Cited (Backward Citations)
US3094771A
Cited
US3191263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |