US5568240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image heating apparatus
Assignee: Canon Inc
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Filing: 1994-10-17
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Granted: 1996-10-22
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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 Ohtsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:23
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: 33
Claim 1
Independent Claim
96 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 and said low thermal conductivity material has a thickness of not less than 10 and not more than 100 μm.
Claim 2
Dependent Claim
96 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 and said low thermal conductivity material has a thickness of not less than 10 and not more than 100 μm.
Claim 3
Dependent Claim
17 words
An apparatus according to claim 1, wherein said low thermal conductivity material is of a resin material.
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
21 words
An apparatus according to claim 1, wherein said conductive layer has a volume resistance of not less than 1.5×10 -8 ohm.cm.
Claim 7
Dependent Claim
22 words
An apparatus according to claim 1, wherein said conductive layer is of a magnetic material exhibiting a Curie temperature of 100°-200° 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
34 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°-250° 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
98 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 a pressing member for cooperating with said movable member to form a nip therebetween; wherein the recording material carrying an unfixed image is passed through the nip, by which the unfixed image is fixed on the recording material by the heat from said movable member, and said excitation coil is provided only at a position opposed to said nip.
Claim 14
Dependent Claim
98 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 a pressing member for cooperating with said movable member to form a nip therebetween; wherein the recording material carrying an unfixed image is passed through the nip, by which the unfixed image is fixed on the recording material by the heat from said movable member, and said excitation coil is provided only at a position opposed to said nip.
Claim 15
Dependent Claim
28 words
An apparatus according to claim 12, further comprising a support for supporting said excitation coil, wherein said pressing member is press-contacted to said support through said movable member.
Claim 16
Dependent Claim
12 words
An apparatus according to claim 13, wherein said movable member is flexible.
Claim 17
Dependent Claim
26 words
An apparatus according to claim 12, wherein said movable member has a low thermal conductivity base material nearer to said excitation coil than said conductive layer.
Claim 18
Dependent Claim
13 words
An apparatus according to claim 12, wherein said conductive layer is of metal.
Claim 19
Dependent Claim
24 words
An apparatus according to claim 12, wherein said conductive layer has a thickness of not less than 1 and not more than 100 μm.
Claim 20
Dependent Claim
21 words
An apparatus according to claim 12, wherein said conductive layer has a volume resistance of not less than 1.5×10 -8 ohm.cm.
Claim 21
Dependent Claim
22 words
An apparatus according to claim 12, wherein said conductive layer is of a magnetic material exhibiting a Curie temperature of 100°-200° C.
Claim 22
Dependent Claim
15 words
An apparatus according to claim 12, wherein said movable member has a surface parting layer.
Claim 23
Dependent Claim
34 words
An apparatus according to claim 12, 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°-250° C.
Claim 24
Dependent Claim
18 words
An apparatus according to claim 12, wherein said movable member is in the form of an endless film.
Claim 25
Dependent Claim
14 words
An apparatus according to claim 12, wherein said movable member is a rotatable member.
Claim 26
Dependent Claim
72 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 conductive layer has a thickness of not less than 1 and not more than 100 μm.
Claim 27
Dependent Claim
72 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 conductive layer has a thickness of not less than 1 and not more than 100 μm.
Claim 28
Dependent Claim
70 words
An image heating apparatus comprising: a movable member having an electrically conductive layer and movable with a recording material; and 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 conductive layer has a volume resistance of not less than 1.5×10 -8 Ω.cm.
Claim 29
Dependent Claim
70 words
An image heating apparatus comprising: a movable member having an electrically conductive layer and movable with a recording material; and 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 conductive layer has a volume resistance of not less than 1.5×10 -8 Ω.cm.
Claim 30
Dependent Claim
70 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 conductive layer is of a magnetic material exhibiting a Curie temperature of 100°-200° C.
Claim 31
Dependent Claim
70 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 conductive layer is of a magnetic material exhibiting a Curie temperature of 100°-200° C.
Claim 32
Dependent Claim
81 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 core material around which said excitation coil is wound; wherein said core material is of a magnetic material exhibit a Curie temperature of 100°-250° C.
Claim 33
Dependent Claim
81 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 core material around which said excitation coil is wound; wherein said core material is of a magnetic material exhibit a Curie temperature of 100°-250° C.
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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) | 1999-10-22 | 2000-04-22 | 2000-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-22 | 2004-04-22 | 2004-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-22 | 2008-04-22 | 2008-10-22 | $7700.00 | Window Closed / Lapsed |