EP0067786A2
Expired / Lapsed
EP
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Apparatus for heating the cylindrical wall of a rotary cylinder of a paper making machine
Assignee: Beloit Corp
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Filing: 1982-06-04
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Granted: —
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Expires: 2002-06-04
Abstract
Abstract Apparatus for heating the cylindrical wall of a rotary cylinder of a paper making machine is described, in particular a drying cylinder for sheet paper in a machine of this type, including drive means for the cylinder operable to make it rotate with a predetermined speed of rotation, at least one magnetic flux generator device and means for supporting this device at a predetermined distance from the said cylinder; the cylindrical side wall of the cylinder is made of a metal material and the said predetermined distance is chosen in such a way that the magnetic flux generated by the device intersects at least part of the side wall itself.
Inventors
- 👤 Udino Stedile
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 23:51
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B13/14; F26B13/18; F26B13/183; D; D21; D21F; D21F5/00; D21F5/02; D21F5/022; D21F5/024
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
122 words
Apparatus for heating the cylindrical wall of a rotary cylinder for a paper making machine, in particular a drying cylinder for the paper sheet of a paper making machine, characterised by the fact that it comprises at least one magnetic flux generator device, means for supporting such device at a predetermined distance from the said cylinder and drive means operable to generate movement, at a predetermined relative angular velocity between the said cylinder and the said magnetic flux generator device, the said cylindrical side wall of the said cylinder being made of metal material, the said predetermined distance being chosen in such a way that the magnetic flux generated by the said device intersects at least part of the said side wall.
Claim 2
Dependent Claim
122 words
Apparatus for heating the cylindrical wall of a rotary cylinder for a paper making machine, in particular a drying cylinder for the paper sheet of a paper making machine, characterised by the fact that it comprises at least one magnetic flux generator device, means for supporting such device at a predetermined distance from the said cylinder and drive means operable to generate movement, at a predetermined relative angular velocity between the said cylinder and the said magnetic flux generator device, the said cylindrical side wall of the said cylinder being made of metal material, the said predetermined distance being chosen in such a way that the magnetic flux generated by the said device intersects at least part of the said side wall.
Claim 3
Dependent Claim
22 words
Apparatus according to claim 1, characterised by the fact that the said magnetic flux generator device includes at least one permanent magnet.
Claim 4
Dependent Claim
38 words
Apparatus according to claim 1 or claim 2, characterised by the fact that the said magnetic flux generator device includes at least one electro magnet magnetisable by the action of an electric current coming from a current source.
Claim 5
Dependent Claim
19 words
Apparatus according to claim 3, characterised by the fact that the said electric current source is a dc source.
Claim 6
Dependent Claim
19 words
Apparatus according to claim 3, characterised by the fact that the said electric current source is an ac source.
Claim 7
Dependent Claim
29 words
Apparatus according to any preceding claim, characterised by the fact that the said magnetic flux generator device is arranged externally of the said cylindrical wall of the said cylinder.
Claim 8
Dependent Claim
33 words
Apparatus according to any of Claims 1 to 6, ! characterised by the fact that the said magnetic flux generator device is arranged internally of the said cylindrical wall of the said cylinder.
Claim 9
Dependent Claim
42 words
Apparatus according to any preceding claim, characterised by the fact that it includes means for adjusting the position of the said magnetic flux generator device with respect to the said cylinder, operable to vary the said predetermined distance from the said cylinder.
Claim 10
Dependent Claim
36 words
Apparatus according to any of claims 1 to 7, characterised by the fact that it includes means for the adjustment of the position of the said cylinder with respect to the said magnetic flux generator device.
Claim 11
Dependent Claim
34 words
Apparatus according to any preceding claim, ' characterised by the fact that the said drive means comprise a motor the speed of which is continuously adjustable, operable to drive the said cylinder to rotate.
Claim 12
Dependent Claim
36 words
Apparatus according to any of the preceding claims, characterised by the fact that it includes means for adjustment of the said current in such a way as to ; vary the magnetisation of the said device.
Claim 13
Dependent Claim
31 words
Apparatus according to any of the preceding claims, characterised by the fact that the said magnetic flux generator devices are angularly displaced with respect to one another by the same angle.
Claim 14
Dependent Claim
64 words
Apparatus according to any preceding claim, characterised by the fact that it includes means for the adjustment of the magnetic flux generated by each of the said devices for the purpose of obtaining a predetermined distribution of the said flux intersecting the said side part of the cylinder, and therefore a predetermined distribution of the energy transmitted between the devices and the said wall.
Claim 15
Dependent Claim
59 words
Apparatus according to any preceding claim, characterised by the fact that the said magnetic flux generator devices are arranged peripherally about the said cylinder in such a way that the resultant of the force generated magnetically by these and the other forces acting on the cylinder itself is substantially zero with respect to the axis of the cylinder itself.
Claim 16
Dependent Claim
66 words
Apparatus according to any preceding claim, characterised by the fact that there are provided means for distributing the said electric current to the said magnetic flux generator devices, and such devices are arranged about the said cylinder in such a way that these constitute the stator of an electric motor the rotor ring of which is constituted by the said side wall of the said cylinder.
References Cited (Backward Citations)
No citation records indexed.
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