Patent US5745833A successfully refreshed from Google Patents.
US5745833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image heating device
Assignee: Canon Inc
•
Filing: 1997-05-19
•
Granted: 1998-04-28
•
Expires: 2017-05-19
Abstract
Abstract There is disclosed an image heating device, provided with a movable member including an electroconductive layer and adapted to move with a recording member, a magnetizing coil for generating a magnetic flux, provided continuously over the entire width of the movable member in a direction perpendicular to the moving direction of the movable member, and a core member for guiding the magnetic flux. The magnetic flux generated by the magnetizing coil induces an eddy current in the movable member, thereby heating an image supported on the recording member by the heat generated in the movable member by the eddy current. At least a part of the magnetizing coil is provided along the movable member not along the core member.
Inventors
- 👤 Atsuyoshi Abe
- 👤 Toru Saitou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:24
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
116 words
An image heating device comprising: a movable member including an electroconductive layer and adapted to move with a recording member; a magnetizing coil for generating a magnetic flux, provided continuously over an entire width of said movable member in a direction perpendicular to a moving direction of said movable member; and a core member for guiding the magnetic flux, wherein the magnetic flux generated by said magnetizing coil induces an eddy current in said movable member, thereby heating an image supported on the recording member by heat generated in said movable member by said eddy current, and at least a part of said magnetizing coil is provided along said movable member not along said core member.
Claim 2
Dependent Claim
116 words
An image heating device comprising: a movable member including an electroconductive layer and adapted to move with a recording member; a magnetizing coil for generating a magnetic flux, provided continuously over an entire width of said movable member in a direction perpendicular to a moving direction of said movable member; and a core member for guiding the magnetic flux, wherein the magnetic flux generated by said magnetizing coil induces an eddy current in said movable member, thereby heating an image supported on the recording member by heat generated in said movable member by said eddy current, and at least a part of said magnetizing coil is provided along said movable member not along said core member.
Claim 3
Dependent Claim
22 words
An image heating device according to claim 1, wherein said magnetizing coil is provided along the moving direction of said movable member.
Claim 4
Dependent Claim
39 words
An image heating device according to claim 1, wherein said movable member is a film, said device further comprises a guide member for guiding the movement of said film, and said magnetizing coil is provided along said guide member.
Claim 5
Dependent Claim
15 words
An image heating device according to claim 3, wherein said film is an endless film.
Claim 6
Dependent Claim
20 words
An image heating device according to claim 1, wherein said magnetizing coil is substantially entirely provided along said movable member.
Claim 7
Dependent Claim
24 words
An image heating device according to claim 5, wherein the distance between said magnetizing coil and said movable member does not exceed 5 mm.
Claim 8
Dependent Claim
21 words
An image heating device according to claim 1, further comprising a back-up member for forming a nip with said movable member.
Claim 9
Dependent Claim
21 words
An image heating device according to claim 7, wherein said core member is provided in a position opposed to said nip.
Claim 10
Dependent Claim
31 words
An image bearing device according to claim 7, wherein said back-up member includes an electroconductive layer and is provided with another magnetizing coil principally for heat generation in said back-up member.
Claim 11
Dependent Claim
22 words
An image heating device according to claim 9, wherein said magnetizing coil for said back-up member is provided along said back-up member.
Claim 12
Dependent Claim
27 words
An image heating device according to claim 1, wherein said magnetizing coil is linearly extended in a direction perpendicular to the moving direction of said movable member.
Claim 13
Dependent Claim
128 words
An image heating device comprising: a movable member including an electroconductive layer and adapted to move with a recording member; a magnetizing coil for generating a magnetic flux, provided continuously over an entire width of said movable member in a direction perpendicular to a moving direction of said movable member; and a back-up member for forming a nip with said movable member, wherein the magnetic flux generated by said magnetizing coil induces an eddy current in said movable member, thereby heating an image supported on the recording member by heat generated in said movable member by said eddy current, and said magnetizing coil is substantially entirely provided along said movable member at least in the upstream side of said nip in the moving direction of said movable member.
Claim 14
Dependent Claim
128 words
An image heating device comprising: a movable member including an electroconductive layer and adapted to move with a recording member; a magnetizing coil for generating a magnetic flux, provided continuously over an entire width of said movable member in a direction perpendicular to a moving direction of said movable member; and a back-up member for forming a nip with said movable member, wherein the magnetic flux generated by said magnetizing coil induces an eddy current in said movable member, thereby heating an image supported on the recording member by heat generated in said movable member by said eddy current, and said magnetizing coil is substantially entirely provided along said movable member at least in the upstream side of said nip in the moving direction of said movable member.
Claim 15
Dependent Claim
43 words
An image heating device according to claim 12, wherein said magnetizing coil is provided at the upstream and downstream sides of said nip in the moving direction of said movable member, and said magnetizing coil is substantially entirely provided along said movable member.
Claim 16
Dependent Claim
24 words
An image heating device according to claim 13, wherein the distance between said magnetizing coil and said movable member does not exceed 5 mm.
Claim 17
Dependent Claim
22 words
An image heating device according to claim 12, wherein said magnetizing coil is provided along the moving direction of said movable member.
Claim 18
Dependent Claim
39 words
An image heating device according to claim 12, wherein said movable member is a film, said device further comprises a guide member for guiding the movement of said film, and said magnetizing coil is provided along said guide member.
Claim 19
Dependent Claim
15 words
An image heating device according to claim 16, wherein said film is an endless film.
Claim 20
Dependent Claim
31 words
An image heating device according to claim 12, wherein said back-up member includes an electroconductive layer and is provided with another magnetizing coil principally for heat generation in said back-up member.
Claim 21
Dependent Claim
22 words
An image heating device according to claim 18, wherein said magnetizing coil for said back-up member is provided along said back-up member.
Claim 22
Dependent Claim
27 words
An image heating device according to claim 12, wherein said magnetizing coil is linearly extended in a direction perpendicular to the moving direction of said movable member.
Claim 23
Dependent Claim
107 words
An image heating device comprising: a film including an electroconductive layer and adapted to move with a recording member carrying an image; and magnetic flux generating means for generating a magnetic flux, wherein the magnetic flux generated by said magnetic flux generating means induces an eddy current in said film, thereby heating the image carried on the recording member by heat generated in said film by said eddy current, and wherein said film includes an elastic layer provided at a position closer to the recording member than said electroconductive layer and a releasing layer provided at a position closer to the recording member than said elastic layer.
Claim 24
Dependent Claim
107 words
An image heating device comprising: a film including an electroconductive layer and adapted to move with a recording member carrying an image; and magnetic flux generating means for generating a magnetic flux, wherein the magnetic flux generated by said magnetic flux generating means induces an eddy current in said film, thereby heating the image carried on the recording member by heat generated in said film by said eddy current, and wherein said film includes an elastic layer provided at a position closer to the recording member than said electroconductive layer and a releasing layer provided at a position closer to the recording member than said elastic layer.
Claim 25
Dependent Claim
29 words
An image heating device according to claim 21, wherein in said film, said elastic layer and said releasing layer are successively formed on said electroconductive layer in order thereof.
Claim 26
Dependent Claim
15 words
An image heating device according to claim 21, wherein said film is an endless film.
Claim 27
Dependent Claim
35 words
An image heating device according to claim 23, said electroconductive layer is located at the most inner side of said film and said releasing layer is located at the most outer side of said film.
Claim 28
Dependent Claim
16 words
An image heating device according to claim 21, wherein said electroconductive layer is a metal layer.
Claim 29
Dependent Claim
24 words
An image heating device according to claim 21, wherein a thickness of said electroconductive film is within a range of 1 to 100 μm.
Claim 30
Dependent Claim
16 words
An image heating device according to claim 21, wherein said elastic layer is a rubber layer.
Claim 31
Dependent Claim
24 words
An image heating device according to claim 21, wherein a thickness of said elastic layer is within a range of 10 to 500 μm.
Claim 32
Dependent Claim
16 words
An image heating device according to claim 21, wherein said releasing layer is a resin layer.
Claim 33
Dependent Claim
24 words
An image heating device according to claim 21, wherein a thickness of said releasing layer is within a range of 1 to 100 μm.
Claim 34
Dependent Claim
27 words
An image heating device according to claim 21, wherein said film includes a resin layer on said electroconductive layer at a side opposite to the recording member.
Claim 35
Dependent Claim
98 words
An endless heating device comprising: an endless film including an electroconductive layer and adapted to move with a recording material carrying an image; and magnetic flux generating means for generating a magnetic flux, wherein the magnetic flux generated by said magnetic flux generating means induces an eddy current in said film, thereby heating the image carried on the recording member by heat generated in said film by said eddy current, and wherein said electroconductive layer is located at the most inner side of said film and said film includes an elastic layer provided outside of said electroconductive layer.
Claim 36
Dependent Claim
98 words
An endless heating device comprising: an endless film including an electroconductive layer and adapted to move with a recording material carrying an image; and magnetic flux generating means for generating a magnetic flux, wherein the magnetic flux generated by said magnetic flux generating means induces an eddy current in said film, thereby heating the image carried on the recording member by heat generated in said film by said eddy current, and wherein said electroconductive layer is located at the most inner side of said film and said film includes an elastic layer provided outside of said electroconductive layer.
Claim 37
Dependent Claim
21 words
An image heating device according to claim 32, wherein in said film said elastic layer is formed on said electroconductive layer.
Claim 38
Dependent Claim
16 words
An image heating device according to claim 32, wherein said electroconductive layer is a metal layer.
Claim 39
Dependent Claim
24 words
An image heating device according to claim 32, wherein a thickness of said electroconductive layer is within a range of 1 to 100 μm.
Claim 40
Dependent Claim
16 words
An image heating device according to claim 32, wherein said elastic layer is a rubber layer.
Claim 41
Dependent Claim
24 words
An image heating device according to claim 32, wherein a thickness of said elastic layer is within a range of 10 to 500 μm.
References Cited (Backward Citations)
US4570044A
Cited
JPS62150371A
Cited
US4912514A
Cited
US5074019A
Cited
US5420679A
Cited
US5303016A
Cited
US5568240A
Cited
US5526103A
Cited
US5666627A
Cited
JPH0816005A
Cited
US5552582A
Cited
JPH08137306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-27 | 2001-10-27 | 2002-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-27 | 2005-10-27 | 2006-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-27 | 2009-10-27 | 2010-04-28 | $7700.00 | Window Closed / Lapsed |