US6069347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating roller device
Assignee: Panasonic Holdings Corp
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Filing: 1998-01-21
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Granted: 2000-05-30
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Expires: 2018-01-21
Abstract
Abstract A heating roller device which incorporates a metal roller having a curier temperature adjusted to an appropriate level and enabling a self-temperature-controllability and which has a structure that the metal roller is induction-heated by an induction heating section. A method of manufacturing the foregoing metal roller according to the present invention has a step of joining a pipe, which is made of temperature-sensitive magnetic metal, and the composition of which has been adjusted so as to have a predetermined curier temperature, and metal having a resistivity lower than that of the temperature-sensitive magnetic metal to each other by a drawing work in such a manner as to prevent formation of any gap. Thus, an induction heating pipe exhibiting an excellent heating characteristic is manufactured.
Inventors
- 👤 Nobuo Genji
- 👤 Takahiro Miyauchi
- 👤 Hidekazu Yamashita
- 👤 Naoaki Ishimaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:27
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/14; H05B6/145; G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
92 words
A heating roller device for heating a target, said heating roller device comprising: a rotatable metal roller having a side wall with an exterior surface for contacting said target, said side wall being composed of a metal with a curier temperature adjusted to an appropriate level an induction heating section for induction-heating said metal roller; and a power source for supplying electric current to said induction heating section, said current having a frequency that creates a skin depth in the side wall that is less than the thickness of the side wall.
Claim 2
Dependent Claim
92 words
A heating roller device for heating a target, said heating roller device comprising: a rotatable metal roller having a side wall with an exterior surface for contacting said target, said side wall being composed of a metal with a curier temperature adjusted to an appropriate level an induction heating section for induction-heating said metal roller; and a power source for supplying electric current to said induction heating section, said current having a frequency that creates a skin depth in the side wall that is less than the thickness of the side wall.
Claim 3
Dependent Claim
80 words
A heating roller device for heating a target, said heating roller device comprising: a rotatable metal roller having an exterior surface for contacting said target, said metal roller including a first layer made of an alloy, which has a curier temperature adjusted to an appropriate level, and a second layer made of a non-magnetic metal laminated on said first layer, said non-magnetic metal having a resistivity lower than said alloy; and an induction heating section for induction-heating said metal roller.
Claim 4
Dependent Claim
80 words
A heating roller device for heating a target, said heating roller device comprising: a rotatable metal roller having an exterior surface for contacting said target, said metal roller including a first layer made of an alloy, which has a curier temperature adjusted to an appropriate level, and a second layer made of a non-magnetic metal laminated on said first layer, said non-magnetic metal having a resistivity lower than said alloy; and an induction heating section for induction-heating said metal roller.
Claim 5
Dependent Claim
30 words
A heating roller device according to claim 2, wherein said second layer is laminated on said first layer so as to form a space between said first and second layers.
Claim 6
Dependent Claim
32 words
A heating roller device according to any one of claims 1 to 3, wherein an induction heating coil forming said induction heating section is disposed on the inside of said metal roller.
Claim 7
Dependent Claim
32 words
A heating roller device according to any one of claims 1 to 3, wherein an induction heating coil forming said induction heating section is disposed on the outside of said metal roller.
Claim 8
Dependent Claim
57 words
A heating roller device according to any one of claims 1 to 3, wherein an induction heating coil forming said induction heating section is disposed at a position where said target to be heated and said metal roller are brought into contact with each other or a position immediately in front of the position of the contact.
Claim 9
Dependent Claim
43 words
A heating roller device according to any one of claims 1 to 3, wherein an induction heating coil forming said induction heating section is disposed at a position where said target to be heated and said metal roller are separated from each other.
Claim 10
Dependent Claim
33 words
A heating roller device according to any one of claims 1 to 3, wherein an electrical insulation material is disposed on a surface of an induction heating coil forming said induction heating section.
Claim 11
Dependent Claim
18 words
A heating roller device according to claim 3, wherein a heat insulation material is disposed in said space.
Claim 12
Dependent Claim
83 words
A heating roller device according to claim 2, wherein said metal roller comprises: a first pipe comprising said first layer, said first pipe being made of said alloy, which is a temperature-sensitive magnetic metal and the composition of which has been adjusted to have a predetermined curier temperature, and a second pipe comprising said second layer and being joined to said first pipe, said second pipe being made of said non-magnetic metal and being joined to said first pipe by a drawing operation.
Claim 13
Dependent Claim
82 words
A heating roller device according to claim 2, wherein said metal roller comprises: a first pipe comprising said first layer, said first pipe being made of said alloy, which is a temperature-sensitive magnetic metal and the composition of which has been adjusted to have a predetermined curier temperature, and a second pipe comprising said second layer and being joined to said first pipe, said second pipe being made of said non-magnetic metal and being joined to said first pipe by press fitting.
Claim 14
Dependent Claim
83 words
A heating roller device according to claim 2, wherein said metal roller comprises: a first pipe comprising said first layer, said first pipe being made of said alloy, which is a temperature-sensitive magnetic metal and the composition of which has been adjusted to have a predetermined curier temperature, and a second pipe comprising said second layer and being joined to said first pipe, said second pipe being made of said non-magnetic metal and being joined to said first pipe by brazing or soldering.
Claim 15
Dependent Claim
86 words
A heating roller device according to claim 2, wherein said metal roller comprises: a first pipe comprising said first layer, said first pipe being made of said alloy, which is a temperature-sensitive magnetic metal and the composition of which has been adjusted to have a predetermined curier temperature, and a second pipe comprising said second layer and being joined to said first pipe, said second pipe being made of said non-magnetic metal and being joined to said first pipe by being cast over said first pipe.
Claim 16
Dependent Claim
26 words
A heating roller device according to claim 2, wherein the thickness of said alloy is in a range from 50% to 200% of a skin depth.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-30 | 2003-11-29 | 2004-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-30 | 2007-11-29 | 2008-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-30 | 2011-11-29 | 2012-05-30 | $7700.00 | Window Closed / Lapsed |