US5552582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image heating apparatus
Assignee: Canon Inc
•
Filing: 1995-06-22
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Granted: 1996-09-03
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Expires: 2015-06-22
Abstract
Abstract An image heating apparatus includes magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by the magnetic flux generating means, wherein the image is heated by the heat; wherein the core member is divided into first and second portions in a direction substantially perpendicular to a movement direction of the electroconductive member.
Inventors
- 👤 Atsuyoshi Abe
- 👤 Yasumasa Ohtsuka
- 👤 Yohji Tomoyuki
- 👤 Manabu Takano
- 👤 Daizo Fukuzawa
- 👤 Kenichi Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:26
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; G03G15/2053; H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/14; H05B6/145
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
85 words
An image heating apparatus comprising: magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by said magnetic flux generating means, wherein the image is heated by the heat; wherein said core member is divided into first and second portions in a direction substantially perpendicular to a movement direction of said electroconductive member.
Claim 2
Dependent Claim
85 words
An image heating apparatus comprising: magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by said magnetic flux generating means, wherein the image is heated by the heat; wherein said core member is divided into first and second portions in a direction substantially perpendicular to a movement direction of said electroconductive member.
Claim 3
Dependent Claim
31 words
An apparatus according to claim 1, wherein an interface where said first and second portions are contacted, corresponds to a boundary between a recording material passage region and a non-passage region.
Claim 4
Dependent Claim
15 words
An apparatus according to claim 1, wherein said core member is accommodated in a holder.
Claim 5
Dependent Claim
17 words
An apparatus according to claim 1, wherein said electroconductive member is a film having an electroconductive layer.
Claim 6
Dependent Claim
13 words
An apparatus according to claim 4, wherein said film is an endless film.
Claim 7
Dependent Claim
21 words
An apparatus according to claim 1, further comprising a pressing member cooperative with said electroconductive member to form a nip therebetween.
Claim 8
Dependent Claim
19 words
An apparatus according to claim 6, wherein said pressing member includes a rotatable member for driving said electroconductive member.
Claim 9
Dependent Claim
94 words
An image heating apparatus comprising: magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by said magnetic flux generating means, wherein the image is heated by the heat; wherein said core member has first and second portions comprising materials different from each other and existing at different positions in a direction substantially perpendicular to a movement direction of said electroconductive member.
Claim 10
Dependent Claim
94 words
An image heating apparatus comprising: magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by said magnetic flux generating means, wherein the image is heated by the heat; wherein said core member has first and second portions comprising materials different from each other and existing at different positions in a direction substantially perpendicular to a movement direction of said electroconductive member.
Claim 11
Dependent Claim
22 words
An apparatus according to claim 8, wherein a magnetic flux density is larger in said second portion than in said first portion.
Claim 12
Dependent Claim
18 words
An apparatus according to claim 9, wherein the material of said second portion is iron, ferrite or permalloy.
Claim 13
Dependent Claim
18 words
An apparatus according to claim 9, wherein said second portion corresponds to an end of said core member.
Claim 14
Dependent Claim
38 words
An apparatus according to claim 9, further comprising a temperature sensor for sensing a temperature of said image heating apparatus, wherein said second portion is disposed at a position corresponding to said temperature sensor in the perpendicular direction.
Claim 15
Dependent Claim
17 words
An apparatus according to claim 8, wherein said first and second portions are divided from each other.
Claim 16
Dependent Claim
95 words
An image heating apparatus comprising: magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by said magnetic flux generating means, wherein the image is heated by the heat; wherein said core member has first and second portions differently distant away from said electroconductive member and existing at different positions in a direction substantially perpendicular to a movement direction of said electroconductive member.
Claim 17
Dependent Claim
95 words
An image heating apparatus comprising: magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by said magnetic flux generating means, wherein the image is heated by the heat; wherein said core member has first and second portions differently distant away from said electroconductive member and existing at different positions in a direction substantially perpendicular to a movement direction of said electroconductive member.
Claim 18
Dependent Claim
22 words
An apparatus according to claim 14, wherein a magnetic flux density is larger in said second portion than in said first portion.
Claim 19
Dependent Claim
18 words
An apparatus according to claim 15, wherein said second portion corresponds to an end of said core member.
Claim 20
Dependent Claim
38 words
An apparatus according to claim 15, further comprising a temperature sensor for sensing a temperature of said image heating apparatus, wherein said second portion is disposed at a position corresponding to said temperature sensor in the perpendicular direction.
Claim 21
Dependent Claim
20 words
An apparatus according to claim 14, wherein the distance between said core member and said electroconductive member is 0.001-10 mm.
Claim 22
Dependent Claim
17 words
An apparatus according to claim 14, wherein said first and second portions are divided from each other.
Claim 23
Dependent Claim
101 words
An image heating apparatus comprising: magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by said magnetic flux generating means, wherein the image is heated by the heat; wherein said core member has first and second portions having different widths measured in a direction of movement of said electroconductive member and existing at different positions in a direction substantially perpendicular to a movement direction of said electroconductive member.
Claim 24
Dependent Claim
101 words
An image heating apparatus comprising: magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by said magnetic flux generating means, wherein the image is heated by the heat; wherein said core member has first and second portions having different widths measured in a direction of movement of said electroconductive member and existing at different positions in a direction substantially perpendicular to a movement direction of said electroconductive member.
Claim 25
Dependent Claim
24 words
An apparatus according to claim 20, wherein an amount of the magnetic flux is larger in said second portion than in said first portion.
Claim 26
Dependent Claim
18 words
An apparatus according to claim 21, wherein said core member sandwiches said excitation coil in said second portion.
Claim 27
Dependent Claim
18 words
An apparatus according to claim 21, wherein said second portion corresponds to an end of said core member.
Claim 28
Dependent Claim
38 words
An apparatus according to claim 21, further comprising a temperature sensor for sensing a temperature of said image heating apparatus, wherein said second portion is disposed at a position corresponding to said temperature sensor in the perpendicular direction.
Claim 29
Dependent Claim
17 words
An apparatus according to claim 20, wherein said first and second portions are divided from each other.
Claim 30
Dependent Claim
100 words
An image heating apparatus comprising: magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by said magnetic flux generating means, wherein the image is heated by the heat; wherein said core member has first and second portions at different positions in a direction of movement of said electroconductive member and existing at different positions in a direction substantially perpendicular to the movement direction of said electroconductive member.
Claim 31
Dependent Claim
100 words
An image heating apparatus comprising: magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by said magnetic flux generating means, wherein the image is heated by the heat; wherein said core member has first and second portions at different positions in a direction of movement of said electroconductive member and existing at different positions in a direction substantially perpendicular to the movement direction of said electroconductive member.
Claim 32
Dependent Claim
52 words
An apparatus according to claim 26, further comprising a pressing member cooperative with said electroconductive member to form a nip, wherein an amount of magnetic flux passing through the nip corresponding to said second portion is larger than that of the magnetic flux passing through the nip corresponding to said first portion.
Claim 33
Dependent Claim
18 words
An apparatus according to claim 27, wherein said second portion corresponds to an end of said core member.
Claim 34
Dependent Claim
38 words
An apparatus according to claim 27, further comprising a temperature sensor for sensing a temperature of said image heating apparatus, wherein said second portion is disposed at a position corresponding to said temperature sensor in the perpendicular direction.
Claim 35
Dependent Claim
17 words
An apparatus according to claim 26, wherein said first and second portions are divided from each other.
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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) | 1999-09-03 | 2000-03-04 | 2000-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-03 | 2004-03-04 | 2004-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-03 | 2008-03-04 | 2008-09-03 | $7700.00 | Window Closed / Lapsed |