Patent US1941010A successfully refreshed from Google Patents.
Patent US5074019A successfully refreshed from Google Patents.
US5074019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll with induction heating arrangement
Assignee: Sulzer Escher Wyss GmbH
•
Filing: 1989-12-08
•
Granted: 1991-12-24
•
Expires: 2009-12-08
Abstract
Abstract In a roll with a roll shell or jacket which is rotatable about a support or beam, the inner side of the rotatable roll shell or jacket is heated by means of an induction coil which is operated at high frequency and provided, for example, at a support element. The heating is effected directly at the press or work nip or in the proximity thereof without substantial loss of energy and without the use of a thermo-sensitive hydraulic medium.
Inventors
- 👤 Christoph Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:54
CPC Classifications
F; F16; F16C; F16C13/00; F16C13/02; F16C13/022; F16C13/024; F16C13/026; F16C13/028; D; D21; D21G; D21G1/00; D21G1/02; D21G1/0206; D21G1/0213; D21G1/022; Y; Y10; Y10S; Y10S29/00; Y10S29/024; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/49758; Y10T29/4976
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
180 words
A roll with a rotatable roll shell for processing a web of material by exerting a pressing force along at least one plane, comprising: a nonrotatable support; a rotatable roll shell rotatable about said nonrotatable support; the rotatable roll shell having an inner surface and an outer surface; at least one support element provided between said inner surface of the rotatable roll shell and said nonrotatable support, said at least one support element being movable relative to said nonrotatable support; said at least one support element supporting the rotatable roll shell with respect to said nonrotatable support; at least one heating device for heating said inner surface of the rotatable roll shell; said at least one heating device being provided with electric induction heating means; and said at least one heating device being arranged within the rotatable roll shell and affixed to and movable with said at least one support element adjacent said inner surface of the rotatable roll shell such that a substantially constant distance is maintained between said at least one heating device and said rotatable roll shell.
Claim 2
Dependent Claim
180 words
A roll with a rotatable roll shell for processing a web of material by exerting a pressing force along at least one plane, comprising: a nonrotatable support; a rotatable roll shell rotatable about said nonrotatable support; the rotatable roll shell having an inner surface and an outer surface; at least one support element provided between said inner surface of the rotatable roll shell and said nonrotatable support, said at least one support element being movable relative to said nonrotatable support; said at least one support element supporting the rotatable roll shell with respect to said nonrotatable support; at least one heating device for heating said inner surface of the rotatable roll shell; said at least one heating device being provided with electric induction heating means; and said at least one heating device being arranged within the rotatable roll shell and affixed to and movable with said at least one support element adjacent said inner surface of the rotatable roll shell such that a substantially constant distance is maintained between said at least one heating device and said rotatable roll shell.
Claim 3
Dependent Claim
82 words
The roll as defined in claim 1, wherein: said at least one supported element defines said at least one plane of pressing force; said roll including a web infeed side on one side of said at least one plane of pressing force and a web outlet side on the other side of said at least one plane of pressing force; and said at least one heating device provided at said at least one support element being mounted at said web inlet side.
Claim 4
Dependent Claim
80 words
The roll as defined in claim 1, wherein: said at least one support element defines said at least one plane of pressing force; said roll including a web infeed side on one side of said at least one plane of pressing force and a web outlet side on the other side of said at least one plane of pressing force; and said at least one heating device provided at said at least one support element at said web outlet side.
Claim 5
Dependent Claim
124 words
The roll as defined in claim 1, wherein: said at least one support element defines said at least one plane of pressing force; said roll including a web infeed side on one side of said at least one plane of pressing force and a web outlet side on the other side of said at least one plane of pressing force; said at least one heating device provided at said at least one support element constituting at least two heating devices; one of said at least two heating devices being mounted at the web inlet side of said plane of pressing force; and the other of said at least two heating devices being mounted at the web outlet side of said plane of pressing force.
Claim 6
Dependent Claim
69 words
The roll as defined in claim 1, wherein: said at least one support element defines said at least one plane of pressing force; and said at least one heating element for heating said inner surface of the rotatable roll shell being laterally provided at said nonrotatable support and approximately in a plane which is substantially perpendicular to said plane of pressing force of said at least one support element.
Claim 7
Dependent Claim
85 words
The roll as defined in claim 1, wherein: the rotatable roll shell has an axial direction; said at least one support element constituting a plurality of support elements provided in mutually adjacent relationship in said axial direction of the rotatable roll shell; said at least one heating device constituting a plurality of heating devices for heating said inner surface of the rotatable roll shell; and each support element of said plurality of support elements carrying an associated heating device of said plurality of heating devices.
Claim 8
Dependent Claim
62 words
The roll as defined in claim 1, further including: at least one additional heating device; the rotatable roll shell having an outer side; said at least one additional heating device being provided at said outer side of the rotatable roll shell; and said at least one additional heating device being provided with electric induction heating means for heating the rotatable roll shell.
Claim 9
Dependent Claim
54 words
The roll as defined in claim 1, wherein: said at least one heating device for heating the inner surface of the rotatable roll shell comprises an induction coil operated by means of high-frequency current; said induction coil having an axis; and said axis of said induction coil being directed toward the rotatable roll shell.
Claim 10
Dependent Claim
251 words
A roll with a rotatable roll shell for processing a web of material by exerting a pressing force along at least one plane, comprising: a nonrotatable support; a rotatable roll shell rotatable about said nonrotatable support; the rotatable shell having an inner surface and an outer surface; at least one support element provided between said inner surface of the rotatable roll shell and said nonrotatable support, said at least one support element being movable relative to said nonrotatable support; said at least one support element supporting the rotatable roll shell with respect to said nonrotatable support; at least two heating devices for heating said inner surface of the rotatable roll shell; said at least two heating devices being provided with electric induction heating means; said at least two heating devices being arranged within the rotatable roll shell and positioned at said at least one support element adjacent said inner surface of the rotatable roll shell; said at least one support element defining said at least one plane of pressing force; said roll including a web infeed side on one side of said at least one plane of pressing force and a web outlet side on the other side of said at least one plane of pressing force; one of said at least two heating devices being mounted at the web inlet side of said plane of pressing force; and the other of said at least two heating devices being mounted at the web outlet side of said plane of pressing force.
Claim 11
Dependent Claim
251 words
A roll with a rotatable roll shell for processing a web of material by exerting a pressing force along at least one plane, comprising: a nonrotatable support; a rotatable roll shell rotatable about said nonrotatable support; the rotatable shell having an inner surface and an outer surface; at least one support element provided between said inner surface of the rotatable roll shell and said nonrotatable support, said at least one support element being movable relative to said nonrotatable support; said at least one support element supporting the rotatable roll shell with respect to said nonrotatable support; at least two heating devices for heating said inner surface of the rotatable roll shell; said at least two heating devices being provided with electric induction heating means; said at least two heating devices being arranged within the rotatable roll shell and positioned at said at least one support element adjacent said inner surface of the rotatable roll shell; said at least one support element defining said at least one plane of pressing force; said roll including a web infeed side on one side of said at least one plane of pressing force and a web outlet side on the other side of said at least one plane of pressing force; one of said at least two heating devices being mounted at the web inlet side of said plane of pressing force; and the other of said at least two heating devices being mounted at the web outlet side of said plane of pressing force.
Claim 12
Dependent Claim
36 words
The roll as defined in claim 9, further including: means for individually controlling heating energy of each individual heating device of said plurality of heating devices for heating said inner surface of the rotatable roll shell.
Claim 13
Dependent Claim
202 words
A roll with a rotatable roll shell for processing a web of material by exerting a pressing force along at least one plane, comprising: a nonrotatable support; a rotatable roll shell rotatable about said nonrotatable support; the rotatable roll shell having an inner surface and an outer surface; at least one support element provided between said inner surface of the rotatable roll shell and said nonrotatable support, said at least one support element being movable relative to said nonrotatable support; said at least one support element supporting the rotatable roll shell with respect to said nonrotatable support; at least one heating device for heating said inner surface of the rotatable roll shell; said at least one heating device being provided with electric induction heating means; said at least one heating device being arranged within the rotatable roll shell and positioned at said at least one support element adjacent said inner surface of the rotatable roll shell; said at least one heating device for heating the inner surface of the rotatable roll shell comprising an induction coil operated by means of high-frequency current; said induction coil having an axis; and said axis of said induction coil being directed toward the rotatable roll shell.
Claim 14
Dependent Claim
202 words
A roll with a rotatable roll shell for processing a web of material by exerting a pressing force along at least one plane, comprising: a nonrotatable support; a rotatable roll shell rotatable about said nonrotatable support; the rotatable roll shell having an inner surface and an outer surface; at least one support element provided between said inner surface of the rotatable roll shell and said nonrotatable support, said at least one support element being movable relative to said nonrotatable support; said at least one support element supporting the rotatable roll shell with respect to said nonrotatable support; at least one heating device for heating said inner surface of the rotatable roll shell; said at least one heating device being provided with electric induction heating means; said at least one heating device being arranged within the rotatable roll shell and positioned at said at least one support element adjacent said inner surface of the rotatable roll shell; said at least one heating device for heating the inner surface of the rotatable roll shell comprising an induction coil operated by means of high-frequency current; said induction coil having an axis; and said axis of said induction coil being directed toward the rotatable roll shell.
Claim 15
Dependent Claim
76 words
The roll as defined in claim 11, further comprising: at least two temperature sensors and a control unit; at least one of said at least two temperature sensors being located at the inner surface of the rotatable roll shell; and at least one other of said at least two temperature sensors being located at the outer surface of the rotatable roll shell; each of said at least two temperature sensors being associated with said control unit.
Claim 16
Dependent Claim
41 words
The roll as defined in claim 12, wherein said control unit is adapted to maintain the temperature difference between the inner side and the outer side of the roll shell such that said temperature difference does not exceed a predetermined value.
References Cited (Backward Citations)
US3200230A
Cited
US3674963A
Cited
US3802044A
Cited
US3697726A
Cited
US3885283A
Cited
CH577598A5
Cited
US4056883A
Cited
US4282638A
Cited
US4282639A
Cited
US4376330A
Cited
US4535230A
Cited
US4465912A
Cited
DE3340683A1
Cited
US4614565A
Cited
US4631794A
Cited
WO1985001532A1
Cited
US4675487A
Cited
US4775773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |