Patent US5778293A successfully refreshed from Google Patents.
US5778293A
Expired / Lapsed
US
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Image heating apparatus
Assignee: Canon Inc
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Filing: 1996-05-30
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Granted: 1998-07-07
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Expires: 2016-05-30
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 the movable member to generate heat therein, and wherein an image on said recording material is heated by heat of the movable member; wherein the 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
2026-11-09 04:42
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: 5
Claim 1
Independent Claim
70 words
An image heating apparatus comprising: an endless film having a metal layer; an excitation coil for producing magnetic flux, which produces eddy current in said film to generate heat therein, and wherein an image on said recording material is heated by heat from said film; and a guiding member for guiding said film, wherein said film is extended around said guiding member, and a part of said film is tension-free.
Claim 2
Dependent Claim
70 words
An image heating apparatus comprising: an endless film having a metal layer; an excitation coil for producing magnetic flux, which produces eddy current in said film to generate heat therein, and wherein an image on said recording material is heated by heat from said film; and a guiding member for guiding said film, wherein said film is extended around said guiding member, and a part of said film is tension-free.
Claim 3
Dependent Claim
12 words
An apparatus according to claim 1, wherein said metal layer is nickel.
Claim 4
Dependent Claim
13 words
An apparatus according to claim 2, wherein said metal layer is plated nickel.
Claim 5
Dependent Claim
35 words
An apparatus according to claim 1, further comprising a driving roller for cooperating with said guiding member to form a nip therebetween with said film therebetween, said driving roller is effective to rotate said film.
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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) | 2001-07-06 | 2002-01-05 | 2002-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-06 | 2006-01-05 | 2006-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-06 | 2010-01-05 | 2010-07-07 | $7700.00 | Window Closed / Lapsed |