US5621510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image heating apparatus with driving roller having low thermal expansion coefficient outer layer
Assignee: Canon Inc
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Filing: 1994-12-28
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Granted: 1997-04-15
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Expires: 2014-12-28
Abstract
Abstract An image heating apparatus includes a film contactable and movable together with a recording material carrying an unfixed image; a heater for increasing a temperature of the film, wherein the unfixed image is heated by heat from the film; driving roller contactable to the film to drive the film; wherein the driving roller have an elastic layer and a low thermal expansion coefficient layer outside the elastic layer.
Inventors
- 👤 Kouichi Okuda
- 👤 Tatsunori Ishiyama
- 👤 Akira Hayakawa
- 👤 Takashi Shibuya
- 👤 Hiroyuki Oba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:03
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; G03G15/206; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2016; G03G2215/2035; G03G2215/2038
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
67 words
An image heating apparatus comprising: a film contactable and movable together with a recording material carrying an unfixed image; means for increasing a temperature of said film, wherein the unfixed image is heated by heat from said film; driving roller contactable to said film to drive said film; wherein said driving roller comprising an elastic layer and a low thermal expansion coefficient layer outside said elastic layer.
Claim 2
Dependent Claim
67 words
An image heating apparatus comprising: a film contactable and movable together with a recording material carrying an unfixed image; means for increasing a temperature of said film, wherein the unfixed image is heated by heat from said film; driving roller contactable to said film to drive said film; wherein said driving roller comprising an elastic layer and a low thermal expansion coefficient layer outside said elastic layer.
Claim 3
Dependent Claim
17 words
An apparatus according to claim 1, wherein said low thermal expansion coefficient layer is of polyimide material.
Claim 4
Dependent Claim
16 words
An apparatus according to claim 1, wherein said low thermal expansion coefficient layer is of aramid.
Claim 5
Dependent Claim
26 words
An apparatus according to claim 1, wherein said low thermal expansion coefficient layer is of copolymer of tetrafloroethylene and perfluoroalkylvinylether containing 25% of glass fiber material.
Claim 6
Dependent Claim
23 words
An apparatus according to claim 1, 3 or 4, wherein said low thermal expansion coefficient layer is in the form of a tube.
Claim 7
Dependent Claim
24 words
An apparatus according to claim 1, wherein said low thermal expansion coefficient layer has a thermal expansion coefficient of less than 100 ppm/° C.
Claim 8
Dependent Claim
24 words
An apparatus according to claim 1, wherein said low thermal expansion coefficient layer has an elasticity of not less than 100 kg/mm 2 .
Claim 9
Dependent Claim
14 words
An apparatus according to claim 1, wherein said elastic layer is of silicone rubber.
Claim 10
Dependent Claim
23 words
An apparatus according to claim 1, wherein the recording material is passed through a nip formed between said driving roller and said film.
Claim 11
Dependent Claim
27 words
An apparatus according to claim 1, further comprising a pressing roller for forming a nip with said film, and the recording material is passed through the nip.
Claim 12
Dependent Claim
15 words
An apparatus according to claim 1, wherein said film temperature increasing means includes a heater.
Claim 13
Dependent Claim
19 words
An apparatus according to claim 11, wherein said driving roller forms a nip with said heater through said film.
Claim 14
Dependent Claim
15 words
An apparatus according to claim 1, wherein said low thermal expansion layer is of metal.
Claim 15
Dependent Claim
74 words
An image heating apparatus, comprising: a first rotatable member; and a second rotatable member contacted to said first rotatable member to drive said first rotatable member; wherein said first rotatable member and said second rotatable member form a nip which is effective to feed a recording material carrying an image while heating the image; and wherein said second rotatable member has an elastic layer and a low thermal expansion layer outside said elastic layer.
Claim 16
Dependent Claim
74 words
An image heating apparatus, comprising: a first rotatable member; and a second rotatable member contacted to said first rotatable member to drive said first rotatable member; wherein said first rotatable member and said second rotatable member form a nip which is effective to feed a recording material carrying an image while heating the image; and wherein said second rotatable member has an elastic layer and a low thermal expansion layer outside said elastic layer.
Claim 17
Dependent Claim
17 words
An apparatus according to claim 14, wherein said low thermal expansion coefficient layer is of polyimide material.
Claim 18
Dependent Claim
16 words
An apparatus according to claim 14, wherein said low thermal expansion coefficient layer is of aramid.
Claim 19
Dependent Claim
26 words
An apparatus according to claim 14, wherein said low thermal expansion coefficient layer is of copolymer of tetrafloroethylene and perfluoroalkylvinylether containing 25% of glass fiber material.
Claim 20
Independent Claim
24 words
An apparatus according to claims 14, 15, 16 or 17, wherein said low thermal expansion coefficient layer is in the form of a tube.
Claim 21
Dependent Claim
24 words
An apparatus according to claim 14, wherein said low thermal expansion coefficient layer has a thermal expansion coefficient of less than 100 ppm/° C.
Claim 22
Dependent Claim
24 words
An apparatus according to claim 14, wherein said low thermal expansion coefficient layer has an elasticity of not less than 100 kg/mm 2 .
Claim 23
Dependent Claim
14 words
An apparatus according to claim 14, wherein said elastic layer is of silicone rubber.
Claim 24
Dependent Claim
15 words
An apparatus according to claim 14, wherein said low thermal expansion layer is of metal.
Claim 25
Dependent Claim
15 words
An apparatus according to claim 14, wherein said first rotatable member contains a heater therein.
Claim 26
Dependent Claim
18 words
An apparatus according to claim 14, wherein said second rotatable member is in the form of a roller.
References Cited (Backward Citations)
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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) | 2000-04-14 | 2000-10-14 | 2001-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-14 | 2004-10-14 | 2005-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-14 | 2008-10-14 | 2009-04-15 | $7700.00 | Window Closed / Lapsed |