Patent US5722026A successfully refreshed from Google Patents.
US5722026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressing rotator and heating-fixing apparatus using the same
Assignee: Canon Inc
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Filing: 1996-08-29
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Granted: 1998-02-24
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Expires: 2016-08-29
Abstract
Abstract To provide a pressing rotor for a heating-fixing apparatus to permanently fix a toner image transferred onto a recording material by passing the image through a nip portion formed by a heating rotator and a pressing rotator, in which the pressing rotator has an elastic layer and a surface layer, and the surface layer is a tube made of a mixture of a fluororesin and a high-friction-factor resin having a friction factor higher than that of the fluororesin, and moreover, provide a heating-fixing apparatus comprising a pressing rotator of the above structure.
Inventors
- 👤 Masahiro Goto
- 👤 Toshio Miyamoto
- 👤 Satoru Izawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:11
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
75 words
A pressing rotator for a heating-fixing apparatus for permanently fixing a toner image transferred onto a recording material by passing the image through a nip portion formed by a heating rotator and a pressing rotator; wherein said pressing rotator has an elastic layer and a surface layer, and said surface layer is a tube made of a mixture of a fluororesin and a high-friction-factor resin having a friction factor higher than that of the fluororesin.
Claim 2
Dependent Claim
75 words
A pressing rotator for a heating-fixing apparatus for permanently fixing a toner image transferred onto a recording material by passing the image through a nip portion formed by a heating rotator and a pressing rotator; wherein said pressing rotator has an elastic layer and a surface layer, and said surface layer is a tube made of a mixture of a fluororesin and a high-friction-factor resin having a friction factor higher than that of the fluororesin.
Claim 3
Dependent Claim
18 words
A pressing rotator according to claim 1, wherein the fluororesin has a friction factor of 0.3 or less.
Claim 4
Dependent Claim
19 words
A pressing rotator according to claim 1, wherein the high-friction-factor resin has a friction factor of 0.5 or more.
Claim 5
Dependent Claim
30 words
A pressing rotator according to claim 1, wherein the fluororesin has a friction factor of 0.3 or less and the high-friction-factor resin has a friction factor of 0.6 or more.
Claim 6
Dependent Claim
19 words
A pressing rotator according to claim 1, wherein an elastic layer has a hardness of 5 degree or less.
Claim 7
Dependent Claim
32 words
A pressing rotator according to claim 1, wherein 5 to 25 parts by weight of the high-friction-factor resin are mixed with 100 parts by weight of the fluororesin in the surface layer.
Claim 8
Dependent Claim
20 words
A pressing rotator according to claim 1, wherein the surface layer has a surface roughness of 0.5 to 2.5 μm.
Claim 9
Dependent Claim
47 words
A pressing rotator according to claim 1, wherein the surface layer has a regular uneven surface shape, and depth H of jogs is kept in a range of 3 to 10 μm and interval L between them is kept in a range of 0.1 to 1 mm.
Claim 10
Dependent Claim
20 words
A pressing rotator according to claim 1, wherein the surface layer is formed at both ends of an elastic layer.
Claim 11
Dependent Claim
19 words
A pressing rotator according to claim 1, wherein said pressing rotator is a belt-like rotator capable of transmitting torque.
Claim 12
Dependent Claim
71 words
A heating-fixing apparatus for permanently fixing a toner image transferred onto a recording material by passing the image through a nip portion formed by a heating rotator and a pressing rotator; wherein said pressing rotator has an elastic layer and a surface layer, and said surface layer is a tube made of a mixture of a fluororesin and a high-friction-factor resin having a friction factor higher than that of the fluororesin.
Claim 13
Dependent Claim
71 words
A heating-fixing apparatus for permanently fixing a toner image transferred onto a recording material by passing the image through a nip portion formed by a heating rotator and a pressing rotator; wherein said pressing rotator has an elastic layer and a surface layer, and said surface layer is a tube made of a mixture of a fluororesin and a high-friction-factor resin having a friction factor higher than that of the fluororesin.
Claim 14
Dependent Claim
18 words
A heating-fixing apparatus according to claim 11, wherein the fluororesin has a friction factor of 0.3 or less.
Claim 15
Dependent Claim
19 words
A heating-fixing apparatus according to claim 11, wherein the high-friction-factor resin has a friction factor of 0.5 or more.
Claim 16
Dependent Claim
30 words
A heating-fixing apparatus according to claim 11, wherein the fluororesin has a friction factor of 0.3 or less and the high-friction-factor resin has a friction factor of 0.6 or more.
Claim 17
Dependent Claim
23 words
A heating-fixing apparatus according to claim 11, wherein the elastic layer has a deformation rate of 5% or more in a nip portion.
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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) | 2001-02-23 | 2001-08-25 | 2002-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-23 | 2005-08-25 | 2006-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-23 | 2009-08-25 | 2010-02-24 | $7700.00 | Window Closed / Lapsed |