US5940655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image heating apparatus
Assignee: Canon Inc
•
Filing: 1997-09-26
•
Granted: 1999-08-17
•
Expires: 2017-09-26
Abstract
Abstract An image heating apparatus includes a movable member which is movable with a recording material; magnetic flux generating means for generating a magnetic flux, wherein the magnetic flux generated by the magnetic flux generating means generates an eddy current which in turn generates heat in the movable member to heat an image an a recording material; and a temperature detecting member for detecting a temperature of the movable member, wherein the temperature detecting member is provided outside a predetermined heat generation region of the movable member.
Inventors
- 👤 Tetsuya Sano
- 👤 Hiroshi Mano
- 👤 Atsuyoshi Abe
- 👤 Kiyofumi Nakane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:29
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039; G03G15/2017; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2016; G03G2215/2035
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
114 words
An image heating apparatus, comprising: a movable member which is movable with a recording material; magnetic flux generating means for generating a magnetic flux, wherein the magnetic flux generated by said magnetic flux generating means generates an eddy current which in turn generates heat in said movable member to heat an image on a recording material; and a temperature detecting member for detecting a temperature of said movable member, wherein said temperature detecting member is provided outside a predetermined heat generation region of said movable member and a heating value at a portion outside the predetermined heat generation region is not more than a maximum heating value of said movable member multiplied by 1/e.
Claim 2
Dependent Claim
114 words
An image heating apparatus, comprising: a movable member which is movable with a recording material; magnetic flux generating means for generating a magnetic flux, wherein the magnetic flux generated by said magnetic flux generating means generates an eddy current which in turn generates heat in said movable member to heat an image on a recording material; and a temperature detecting member for detecting a temperature of said movable member, wherein said temperature detecting member is provided outside a predetermined heat generation region of said movable member and a heating value at a portion outside the predetermined heat generation region is not more than a maximum heating value of said movable member multiplied by 1/e.
Claim 3
Dependent Claim
30 words
An apparatus according to claim 1, wherein said movable member is a hollow rotatable member, and said temperature detecting member is contacted to an inner surface of said rotatable member.
Claim 4
Dependent Claim
14 words
An apparatus according to claim 1, wherein said movable member is an endless film.
Claim 5
Dependent Claim
26 words
An apparatus according to claim 3, further comprising a guiding member for guiding said film, and said temperature detecting member is supported on said guiding member.
Claim 6
Dependent Claim
13 words
An apparatus according to claim 3, wherein said film has an electroconductive layer.
Claim 7
Dependent Claim
13 words
An apparatus according to claim 5, wherein said electroconductive layer is highly thermoconductive.
Claim 8
Dependent Claim
16 words
An apparatus according to claim 1, wherein said magnetic flux generating means has an excitation coil.
Claim 9
Dependent Claim
21 words
An apparatus according to claim 1, further comprising a back-up member for cooperating with said movable member to form a nip.
Claim 10
Dependent Claim
31 words
An apparatus according to claim 8, wherein said temperature detecting member is disposed adjacent to said nip downstream of said nip with respect to a movement direction of said movable member.
Claim 11
Dependent Claim
38 words
An apparatus according to claim 8, wherein said movable member is a film, and said apparatus further comprises a guiding member for guiding said film, and said back-up member is press-contacted to said guiding member through said film.
Claim 12
Dependent Claim
29 words
An apparatus according to claim 8, wherein the recording material carrying an unfixed image is passed through said nip so that unfixed image is fixed on the recording material.
Claim 13
Dependent Claim
42 words
An apparatus according to claim 11, wherein the unfixed image is a toner image having a plurality of laminated different color toners, and a color image is provided by mixture of the toners and by fixing the mixture on the recording material.
Claim 14
Dependent Claim
34 words
An apparatus according to claim 1, wherein said temperature detecting member is a thermister, and a temperature of said movable member is controlled to be a predetermined level by an output of said thermister.
Claim 15
Dependent Claim
20 words
An apparatus according to claim 1, wherein said movable member is contacted to an unfixed image on the recording material.
Claim 16
Dependent Claim
128 words
An image heating apparatus, comprising: a movable member which is movable with a recording material; an excitation coil for generating a magnetic flux, wherein the magnetic flux generated by said excitation coil generates an eddy current which in turn generates heat in said movable member to heat an image on a recording material; a magnetic member for guiding the magnetic flux generated by said excitation coil; and a temperature detecting member for detecting a temperature of said movable member, wherein said temperature detecting member is provided substantially outside a magnetic flux path formed by said movable member and said magnetic member and a heating value at a portion outside said magnetic flux path is not more than a maximum heating value of said movable member multiplied by 1/e.
Claim 17
Dependent Claim
128 words
An image heating apparatus, comprising: a movable member which is movable with a recording material; an excitation coil for generating a magnetic flux, wherein the magnetic flux generated by said excitation coil generates an eddy current which in turn generates heat in said movable member to heat an image on a recording material; a magnetic member for guiding the magnetic flux generated by said excitation coil; and a temperature detecting member for detecting a temperature of said movable member, wherein said temperature detecting member is provided substantially outside a magnetic flux path formed by said movable member and said magnetic member and a heating value at a portion outside said magnetic flux path is not more than a maximum heating value of said movable member multiplied by 1/e.
Claim 18
Dependent Claim
27 words
An apparatus according to claim 15, wherein said temperature detecting member is a thermister, which has an electroconductive temperature detection portion, electrode portion and a lead portion.
Claim 19
Dependent Claim
26 words
An apparatus according to claim 15, wherein a temperature of said movable member is controlled to be a predetermined level by an output of said thermister.
Claim 20
Dependent Claim
14 words
An apparatus according to claim 15, wherein said movable member is an endless film.
Claim 21
Dependent Claim
13 words
An apparatus according to claim 18, wherein said film has an electroconductive layer.
Claim 22
Dependent Claim
13 words
An apparatus according to claim 19, wherein said electroconductive layer is highly thermoconductive.
Claim 23
Dependent Claim
21 words
An apparatus according to claim 15, further comprising a back-up member for cooperating with said movable member to form a nip.
Claim 24
Dependent Claim
38 words
An apparatus according to claim 21, wherein said movable member is a film, and said apparatus further comprises a guiding member for guiding said film, and said back-up member is press-contacted to said guiding member through said film.
Claim 25
Dependent Claim
30 words
An apparatus according to claim 21, wherein the recording material carrying an unfixed image is passed through said nip so that the unfixed image is fixed on the recording material.
Claim 26
Dependent Claim
34 words
An apparatus according to claim 23, wherein the unfixed image is a toner image having a laminated different color toner a , and a color image is provided by mixture of them by fixing.
Claim 27
Dependent Claim
15 words
An apparatus according to claim 15, wherein said temperature detecting member contacts the movable member.
Claim 28
Dependent Claim
20 words
An apparatus according to claim 15, wherein said movable member is contacted to an unfixed image on the recording material.
Claim 29
Dependent Claim
101 words
An image heating apparatus, comprising: an endless film which is movable with a recording material; magnetic flux generating means for generating a magnetic flux, wherein the magnetic flux generated by said magnetic flux generating means generates an eddy current which in turn generates heat in said film to heat an image on a recording material; a temperature detecting member for detecting a temperature of said film; and a guiding member for guiding said film, wherein said temperature detecting member is provided outside a predetermined heat generation region of said film, and said temperature detecting member is supported on said guiding member.
Claim 30
Dependent Claim
101 words
An image heating apparatus, comprising: an endless film which is movable with a recording material; magnetic flux generating means for generating a magnetic flux, wherein the magnetic flux generated by said magnetic flux generating means generates an eddy current which in turn generates heat in said film to heat an image on a recording material; a temperature detecting member for detecting a temperature of said film; and a guiding member for guiding said film, wherein said temperature detecting member is provided outside a predetermined heat generation region of said film, and said temperature detecting member is supported on said guiding member.
Claim 31
Dependent Claim
85 words
An image heating apparatus, comprising: an endless film which is movable with a recording material; magnetic flux generating means for generating a magnetic flux, wherein the magnetic flux generated by said magnetic flux generating means generates an eddy current which in turn generates heat in said film to heat an image on a recording material; a temperature detecting member for detecting a temperature of said film; and a guiding member for guiding said film, wherein said temperature detecting member is supported on said guiding member.
Claim 32
Dependent Claim
85 words
An image heating apparatus, comprising: an endless film which is movable with a recording material; magnetic flux generating means for generating a magnetic flux, wherein the magnetic flux generated by said magnetic flux generating means generates an eddy current which in turn generates heat in said film to heat an image on a recording material; a temperature detecting member for detecting a temperature of said film; and a guiding member for guiding said film, wherein said temperature detecting member is supported on said guiding member.
Claim 33
Dependent Claim
42 words
An apparatus according to claim 28, wherein said magnetic flux generating means has a magnetic member for guiding the magnetic flux, and said temperature detecting member is provided substantially outside a magnetic flux path formed by said film and said magnetic member.
Claim 34
Dependent Claim
32 words
An apparatus according to claim 29, wherein a heating value at a portion outside said magnetic flux path is not more than a maximum heating value of said film multiplied by 1/e.
Claim 35
Dependent Claim
29 words
An apparatus according to claim 28, wherein said temperature detecting member is provided on such a side of said guiding member so as to be contacted to said film.
References Cited (Backward Citations)
US4570044A
Cited
JPS62150371A
Cited
US5088836A
Cited
US5499088A
Cited
JPH059027A
Cited
JPH07114276A
Cited
US5568240A
Cited
US5526103A
Cited
US5552582A
Cited
US5752148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-16 | 2003-02-15 | 2003-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-16 | 2007-02-15 | 2007-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-16 | 2011-02-15 | 2011-08-17 | $7700.00 | Window Closed / Lapsed |