US4058877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflection-controlled roll for the pressure treatment of materials in web form
Assignee: Sulzer Escher Wyss AG
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Filing: 1976-04-06
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Granted: 1977-11-22
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Expires: 1996-04-06
Abstract
Abstract The deflection-controlled roll has a roll shell rotatable about a fixed beam with a plurality of hydraulic piston support devices along the roll for exerting support forces between the beam and the roll shell. The roll shell has weakened zones along its length for reducing the stiffness of the shell. The weakened zones may comprise grooves, circumferential rows of bores or tangential slots, corrugated annular inserts, etc. The weakened zones may be formed between annular portions of the roll shell aligned with the operating surfaces of the support devices. Preferably the support devices form hydrostatic support fluid layers between the operating surfaces and the roll shell. Lift-off support devices may be employed.
Inventors
- 👤 Rolf Lehmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:06
CPC Classifications
F; F16; F16C; F16C13/00; F16C13/02; F16C13/022; F16C13/024; F16C13/026; F16C13/028; B; B41; B41F; B41F13/00; B41F13/08; B41F13/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A deflection-controlled roll for the pressure treatment of materials in web form comprising a fixed beam, a continuous cylindrical roll shell rotatable about the beam, an elastomeric covering on the roll shell and a plurality of hydraulic piston support devices positioned along the length of the roll for exerting support forces between the beam and the roll shell at respective operating surfaces of the devices, said roll shell having annular portions with smooth inner surfaces aligned with and forming runways for said operating surfaces of said support devices and circumferential zones spaced along the length thereof between said annular portions of greater flexibility than said annular portions for reducing the stiffness of the shell to lateral forces imposed thereon during operation.
Claim 2
Dependent Claim
121 words
A deflection-controlled roll for the pressure treatment of materials in web form comprising a fixed beam, a continuous cylindrical roll shell rotatable about the beam, an elastomeric covering on the roll shell and a plurality of hydraulic piston support devices positioned along the length of the roll for exerting support forces between the beam and the roll shell at respective operating surfaces of the devices, said roll shell having annular portions with smooth inner surfaces aligned with and forming runways for said operating surfaces of said support devices and circumferential zones spaced along the length thereof between said annular portions of greater flexibility than said annular portions for reducing the stiffness of the shell to lateral forces imposed thereon during operation.
Claim 3
Dependent Claim
18 words
A roll according to claim 1 in which said flexible zones include circumferential grooves in the roll shell.
Claim 4
Dependent Claim
18 words
A roll according to claim 2 in which said grooves are on the outside of said roll shell.
Claim 5
Dependent Claim
40 words
A roll according to claim 1 in which the flexible zones between said annular portions of the roll shell include at least three grooves alternately on the outside and on the inside of the roll shell in longitudinally displaced relationship.
Claim 6
Dependent Claim
40 words
A roll according to claim 1 in which said flexible zones are formed by annular inserts between said annular portions and joined thereto, said annular inserts having a smaller wall thickness than the annular portions and having a corrugated cross-section.
Claim 7
Dependent Claim
41 words
A roll according to claim 1 in which said flexible zones between said annular portions include at least two circumferential axially-spaced rows of bores in the roll shell, the bores in adjacent rows being circumferentially offset with respect to each other.
Claim 8
Dependent Claim
45 words
A roll according to claim 1 in which said flexible zones include a plurality of circumferential axial-spaced rows of bores in the roll shell, the bores in adjacent rows being circumferentially offset with respect to each other, said elastomeric covering having portions filling said bores.
Claim 9
Dependent Claim
38 words
A roll according to claim 1 in which said flexible zones include a plurality of axially-spaced rows of circumferentially-spaced tangential slots in the roll shell, the slots in adjacent rows being circumferentially offset with respect to each other.
Claim 10
Dependent Claim
20 words
A roll according to claim 1 including means for supplying fluid under pressure independently to a plurality of said devices.
Claim 11
Dependent Claim
29 words
A roll according to claim 1 in which said hydraulic piston support devices include means for forming hydrostatic support fluid layers between said operating surfaces and the roll shell.
Claim 12
Dependent Claim
71 words
A roll according to claim 1 in which said plurality of hydraulic piston support devices are arranged in a row along the length of the roll for exerting pressure between the roll shell and a counter member, and including a plurality of hydraulic piston support devices spaced along the length of the roll diametrically opposite said row for exerting lift-off forces on the roll shell with respect to said counter member.
References Cited (Backward Citations)
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US3336648A
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US3389450A
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US3587152A
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US3676908A
Cited
US3665572A
Cited
US3802044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |