EP0649072A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An image heating apparatus
Assignee: Canon Inc
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Filing: 1994-10-17
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Granted: —
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Expires: 2014-10-17
Abstract
Abstract An image heating apparatus includes a movable member having an electrically conductive layer and movable with a recording material; an excitation coil for producing magnetic flux, which produces eddy current in said movable member to generate heat therein, and wherein an image on said recording material is heated by heat of said movable member; wherein said movable member has a low thermal conductivity material at a side nearer to said excitation coil than the conductive layer.
Inventors
- 👤 Yasumasa C/O Canon Kabushiki Kaisha Ohtsuka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:38
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; G03G15/2064; H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/105; H05B6/14; H05B6/145; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2048; H05B2206/00; H05B2206/02; H05B2206/023
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
76 words
An image heating apparatus comprising: a movable member having an electrically conductive layer and movable with a recording material; an excitation coil for producing magnetic flux, which produces eddy current in said movable member to generate heat therein, and wherein an image on said recording material is heated by heat of said movable member; wherein said movable member has a low thermal conductivity material at a side nearer to said excitation coil than the conductive layer.
Claim 2
Dependent Claim
17 words
An apparatus according to Claim 1, wherein said low thermal conductivity material is of a resin material.
Claim 3
Dependent Claim
26 words
An apparatus according to Claim 1, wherein said low thermal conductivity material has a thickness of not less than 10 and not more than 100 µm.
Claim 4
Dependent Claim
13 words
An apparatus according to Claim 1, wherein said conductive layer is of metal.
Claim 5
Dependent Claim
24 words
An apparatus according to Claim 1, wherein said conductive layer has a thickness of not less than 1 and not more than 100 µm.
Claim 6
Dependent Claim
20 words
An apparatus according to Claim 1, wherein said conductive layer has a volume resistance of not less than 1.5x10⁻⁸ ohm.cm.
Claim 7
Dependent Claim
25 words
An apparatus according to Claim 1, wherein said conductive layer is of a magnetic material exhibiting a Curie temperature of 100 - 200 o C.
Claim 8
Dependent Claim
15 words
An apparatus according to Claim 1, wherein said movable member has a surface parting layer.
Claim 9
Dependent Claim
37 words
An apparatus according to Claim 1, further comprising a core material around which said excitation coil is wound, and said core material is of a magnetic material exhibiting a Curie temperature of 100 - 200 o C.
Claim 10
Dependent Claim
18 words
An apparatus according to Claim 1, wherein said movable member is in the form of an endless film.
Claim 11
Dependent Claim
14 words
An apparatus according to Claim 1, wherein said movable member is a rotatable member.
Claim 12
Dependent Claim
44 words
An apparatus according to Claim 1, further comprising a pressing member cooperable with said movable member to form a nip therebetween, wherein the recording material carrying an unfixed image is passed through the nip so that the image is fixed on the recording material.
Claim 13
Dependent Claim
78 words
An image heating apparatus comprising: a movable member having an electrically conductive layer and movable with a recording material; an excitation coil for producing magnetic flux, which produces eddy current in said movable member to generate heat therein, and wherein an image on said recording material is heated by heat of said movable member; and a pressing member for cooperating with said movable member to form a nip therebetween; wherein said excitation coil is opposed to said nip.
Claim 14
Dependent Claim
28 words
An apparatus according to Claim 13, further comprising a support for supporting said excitation coil, wherein said pressing member is press-contacted to said support through said movable member.
Claim 15
Dependent Claim
12 words
An apparatus according to Claim 14, wherein said movable member is flexible.
Claim 16
Dependent Claim
26 words
An apparatus according to Claim 13, wherein said movable member has a low thermal conductivity base material nearer to said excitation coil than said conductive layer.
Claim 17
Dependent Claim
13 words
An apparatus according to Claim 13, wherein said conductive layer is of metal.
Claim 18
Dependent Claim
24 words
An apparatus according to Claim 13, wherein said conductive layer has a thickness of not less than 1 and not more than 100 µm.
Claim 19
Dependent Claim
20 words
An apparatus according to Claim 13, wherein said conductive layer has a volume resistance of not less than 1.5x10⁻⁸ ohm.cm.
Claim 20
Dependent Claim
25 words
An apparatus according to Claim 13, wherein said conductive layer is of a magnetic material exhibiting a Curie temperature of 100 - 200 o C.
Claim 21
Dependent Claim
15 words
An apparatus according to Claim 13, wherein said movable member has a surface parting layer.
Claim 22
Dependent Claim
37 words
An apparatus according to Claim 13, further comprising a core material around which said excitation coil is wound, and said core material is of a magnetic material exhibiting a Curie temperature of 100 - 200 o C.
Claim 23
Dependent Claim
18 words
An apparatus according to Claim 13, wherein said movable member is in the form of an endless film.
Claim 24
Dependent Claim
14 words
An apparatus according to Claim 13, wherein said movable member is a rotatable member.
Claim 25
Dependent Claim
29 words
An apparatus according to Claim 13, wherein the recording material carrying an unfixed image is passed through said nip, so that the image is fixed on the recording material.
References Cited (Backward Citations)
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