US5091752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image heating apparatus using film driven by rotatable member
Assignee: Canon Inc
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Filing: 1991-02-20
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Granted: 1992-02-25
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Expires: 2011-02-20
Abstract
Abstract An image heating apparatus includes a heater; a film movable in contact with a recording material carrying an image, wherein the image on the recording material is heated by heat from the heater through the film; a driving rotatable member for driving the film; wherein the driving rotatable member has a heat insulative surface layer.
Inventors
- 👤 Tamotsu Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; G03G15/206; G03G2215/00; G03G2215/00135; G03G2215/00139; G03G2215/00143; G03G2215/00151; G03G2215/20; G03G2215/2003; G03G2215/2016; G03G2215/2035; G03G2215/2038; G03G2215/2058; G03G2215/2061; G03G2215/2064
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
66 words
An image heating apparatus, comprising: a heater; a film movable in contact with a recording material carrying an image, wherein the image on the recording material is heated by heat from said heater through said film; an unheated driving rotatable member for driving said film, said driving rotatable member being positioned away from said heater; wherein said driving rotatable member has a heat insulative surface layer.
Claim 2
Dependent Claim
66 words
An image heating apparatus, comprising: a heater; a film movable in contact with a recording material carrying an image, wherein the image on the recording material is heated by heat from said heater through said film; an unheated driving rotatable member for driving said film, said driving rotatable member being positioned away from said heater; wherein said driving rotatable member has a heat insulative surface layer.
Claim 3
Dependent Claim
16 words
An apparatus according to claim 1, wherein the surface layer is of rubber or resin material.
Claim 4
Dependent Claim
17 words
An apparatus according to claim 1, wherein said film is in the form of an endless belt.
Claim 5
Dependent Claim
14 words
An apparatus according to claim 1, wherein said film is slidable on said heater.
Claim 6
Dependent Claim
26 words
An apparatus according to claim 1, wherein said rotatable member is disposed downstream of said heater with respect to a movement direction of the recording material.
Claim 7
Dependent Claim
40 words
An apparatus according to claim 1, further comprising a pressing member cooperative with said film to form a nip therebetween, wherein said rotatable member is disposed downstream of the nip with respect to a movement direction of the recording material.
Claim 8
Dependent Claim
20 words
An apparatus according to claim 1, wherein said heating apparatus is effective to heat-fix the image on the recording material.
Claim 9
Dependent Claim
27 words
An apparatus according to claim 1, wherein said rotatable member is in the form of a roller, and wherein the surface layer is on a metal core.
Claim 10
Dependent Claim
71 words
An image heating apparatus, comprising: a heater; a film movable in contact with a recording material carrying an image, wherein the image on the recording material is heated by heat from said heater through said film; an unheated driving rotatable member for driving said film, said driving rotatable member being positioned away from said heater; wherein said rotatable member has a surface rubber layer having a thickness of 20 microns-1.5 mm.
Claim 11
Dependent Claim
71 words
An image heating apparatus, comprising: a heater; a film movable in contact with a recording material carrying an image, wherein the image on the recording material is heated by heat from said heater through said film; an unheated driving rotatable member for driving said film, said driving rotatable member being positioned away from said heater; wherein said rotatable member has a surface rubber layer having a thickness of 20 microns-1.5 mm.
Claim 12
Dependent Claim
15 words
An apparatus according to claim 9, wherein said surface layer is of silicone rubber material.
Claim 13
Dependent Claim
13 words
An apparatus according to claim 9, wherein the surface layer is electrically conductive.
Claim 14
Dependent Claim
17 words
An apparatus according to claim 9, wherein said film is in the form of an endless belt.
Claim 15
Dependent Claim
14 words
An apparatus according to claim 9, wherein said film is slidable on said heater.
Claim 16
Dependent Claim
20 words
An apparatus according to claim 9, wherein said heating apparatus is effective to heat-fix the image on the recording material.
Claim 17
Dependent Claim
26 words
An apparatus according to claim 9, wherein said rotatable member is in the form of a roller, and the surface layer is on a metal core.
Claim 18
Dependent Claim
60 words
An image heating apparatus, comprising: a heater; a film movable in contact with a recording material carrying an image, wherein the image on the recording material is heated by heat from said heater through said film; a driving rotatable member for driving said film; wherein a frictional coefficient between a surface of said rotatable member and said film is 0.3-3.
Claim 19
Dependent Claim
60 words
An image heating apparatus, comprising: a heater; a film movable in contact with a recording material carrying an image, wherein the image on the recording material is heated by heat from said heater through said film; a driving rotatable member for driving said film; wherein a frictional coefficient between a surface of said rotatable member and said film is 0.3-3.
Claim 20
Dependent Claim
27 words
An apparatus according to claim 16, wherein the surface of said rotatable member is of rubber, and an inside surface of said film is of resin material.
Claim 21
Dependent Claim
17 words
An apparatus according to claim 16, wherein said film is in the form of an endless belt.
Claim 22
Dependent Claim
14 words
An apparatus according to claim 16, wherein said film is slidable on said heater.
Claim 23
Dependent Claim
20 words
An apparatus according to claim 16, wherein said heating apparatus is effective to heat-fix the image on the recording material.
Claim 24
Dependent Claim
79 words
An image heating apparatus, comprising: a heater; an endless belt movable in contact with a recording material carrying an image, wherein the image on the recording material is heated by heat from said heater through said belt; a driving roller for -driving said belt; a follower roller rotatably following an inside surface of said belt; wherein a frictional coefficient between said driving roller and said belt is larger than a frictional coefficient between said follower roller and said belt.
Claim 25
Dependent Claim
79 words
An image heating apparatus, comprising: a heater; an endless belt movable in contact with a recording material carrying an image, wherein the image on the recording material is heated by heat from said heater through said belt; a driving roller for -driving said belt; a follower roller rotatably following an inside surface of said belt; wherein a frictional coefficient between said driving roller and said belt is larger than a frictional coefficient between said follower roller and said belt.
Claim 26
Dependent Claim
25 words
An apparatus according to claim 21, wherein said driving roller has an outer diameter which is larger than an outer diameter of said follower roller.
Claim 27
Dependent Claim
26 words
An apparatus according to claim 1, wherein a winding angle of the belt relative to said driving roller is larger than that around said follower roller.
Claim 28
Dependent Claim
17 words
An apparatus according to claim 21, wherein said belt is in the form of a thin film.
Claim 29
Dependent Claim
15 words
An apparatus according to claim 21, wherein said driving roller has an elastic surface layer.
Claim 30
Dependent Claim
14 words
An apparatus according to claim 21, wherein said film is slidable on said heater.
Claim 31
Dependent Claim
20 words
An apparatus according to claim 21, wherein said heating apparatus is effective to heat-fix the image on the recording material.
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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) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |