US5608508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable member for fixing in which inorganic filler is contained in silicone rubber, and fixing device having the same
Assignee: Canon Inc
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Filing: 1995-03-20
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Granted: 1997-03-04
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Expires: 2015-03-20
Abstract
Abstract A fixing rotatable member for use in an image forming apparatus such as a copying apparatus or a laser beam printer is disclosed. The fixing rotatable member includes a base member and an elastic layer provided on the surface thereof. The elastic layer is addition type silicone rubber in which resin-like polyorganosiloxane and 0.1 to 2 percent by weight of inorganic fine powder are mixed.
Inventors
- 👤 Hiroaki Kumagai
- 👤 Takeshi Menjo
- 👤 Kazuo Kishino
- 👤 Masaaki Takahashi
- 👤 Rie Saito
- 👤 Jiro Ishizuka
- 👤 Hideo Kawamoto
- 👤 Ryuichiro Maeyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:00
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
46 words
A fixing rotatable member comprising: a base member; and an elastic layer provided on a surface of said fixing rotatable member; said elastic layer being addition type silicone rubber in which resin-like polyorganosiloxane and 0.1 to 2 percent by weight of inorganic fine powder are mixed.
Claim 2
Dependent Claim
46 words
A fixing rotatable member comprising: a base member; and an elastic layer provided on a surface of said fixing rotatable member; said elastic layer being addition type silicone rubber in which resin-like polyorganosiloxane and 0.1 to 2 percent by weight of inorganic fine powder are mixed.
Claim 3
Dependent Claim
15 words
A fixing rotatable member according to claim 1, wherein said inorganic fine powder is silica.
Claim 4
Dependent Claim
18 words
A fixing rotatable member according to claim 1, wherein said elastic layer is provided on said base member.
Claim 5
Dependent Claim
24 words
A fixing rotatable member according to claim 1, wherein said elastic layer is provided on said base member with another elastic layer interposed therebetween.
Claim 6
Dependent Claim
20 words
A fixing rotatable member according to claim 1, wherein said elastic layer is in contact with an unfixed toner image.
Claim 7
Dependent Claim
46 words
A pressing rotatable member comprising: a base member; and an elastic layer provided on a surface of said pressing rotatable member; said elastic layer being addition type silicone rubber in which resin-like polyorganosiloxane and 0.5 to 8 percent by weight of inorganic fine powder are mixed.
Claim 8
Dependent Claim
46 words
A pressing rotatable member comprising: a base member; and an elastic layer provided on a surface of said pressing rotatable member; said elastic layer being addition type silicone rubber in which resin-like polyorganosiloxane and 0.5 to 8 percent by weight of inorganic fine powder are mixed.
Claim 9
Dependent Claim
15 words
A pressing rotatable member according to claim 6, wherein said inorganic fine powder is silica.
Claim 10
Dependent Claim
18 words
A pressing rotatable member according to claim 6, wherein said elastic layer is provided on said base material.
Claim 11
Dependent Claim
24 words
A pressing rotatable member according to claim 6, wherein said elastic layer is provided on said base material with another elastic layer interposed therebetween.
Claim 12
Dependent Claim
34 words
A pressing rotatable member according to claim 6, wherein said elastic layer is in contact with a surface opposite to an unfixed toner image on a recording medium carrying an unfixed toner image thereon.
Claim 13
Dependent Claim
130 words
A fixing device comprising: a fixing rotatable member having an elastic layer on a surface of said fixing rotatable member; and a pressing rotatable member having an elastic layer on a surface of said pressing rotatable member; said fixing rotatable member and said pressing rotatable member forming a nip therebetween, and holding and conveying a recording medium carrying an unfixed toner image thereon by said nip to thereby effect fixing; the elastic layer of said fixing rotatable member being addition type silicone rubber in which resin-like polyorganosiloxane and 0.1 to 2 percent by weight of inorganic fine powder are mixed, the elastic layer of said pressing rotatable member being addition type silicone rubber in which resin-like polyorganosiloxane and 0.5 to 8 percent by weight of inorganic fine powder are mixed.
Claim 14
Dependent Claim
130 words
A fixing device comprising: a fixing rotatable member having an elastic layer on a surface of said fixing rotatable member; and a pressing rotatable member having an elastic layer on a surface of said pressing rotatable member; said fixing rotatable member and said pressing rotatable member forming a nip therebetween, and holding and conveying a recording medium carrying an unfixed toner image thereon by said nip to thereby effect fixing; the elastic layer of said fixing rotatable member being addition type silicone rubber in which resin-like polyorganosiloxane and 0.1 to 2 percent by weight of inorganic fine powder are mixed, the elastic layer of said pressing rotatable member being addition type silicone rubber in which resin-like polyorganosiloxane and 0.5 to 8 percent by weight of inorganic fine powder are mixed.
Claim 15
Dependent Claim
25 words
A fixing device according to claim 11, wherein the inorganic fine powder of said fixing rotatable member and of said pressing rotatable member is silica.
Claim 16
Dependent Claim
20 words
A fixing device according to claim 11, wherein said fixing rotatable member is in contact with the unfixed toner image.
Claim 17
Dependent Claim
39 words
A fixing device according to claim 11, wherein said device fixes an unfixed toner image carried on a first surface of the recording medium, thereafter, fixes an unfixed toner image carried on a second surface of the recording medium.
Claim 18
Dependent Claim
115 words
A fixing device comprising: a fixing rotatable member having an elastic layer on a surface of said fixing rotatable member; and a pressing rotatable member having an elastic layer on a surface of said pressing rotatable member; said fixing rotatable member and said pressing rotatable member forming a nip therebetween, and holding and conveying a recording medium carrying an unfixed toner image thereon by said nip to thereby effect fixing; the elastic layers of said fixing rotatable member and said pressing rotatable member each containing inorganic fine powder, an amount of the inorganic fine powder of said pressing rotatable member being greater than an amount of the inorganic fine powder of said fixing rotatable member.
Claim 19
Dependent Claim
115 words
A fixing device comprising: a fixing rotatable member having an elastic layer on a surface of said fixing rotatable member; and a pressing rotatable member having an elastic layer on a surface of said pressing rotatable member; said fixing rotatable member and said pressing rotatable member forming a nip therebetween, and holding and conveying a recording medium carrying an unfixed toner image thereon by said nip to thereby effect fixing; the elastic layers of said fixing rotatable member and said pressing rotatable member each containing inorganic fine powder, an amount of the inorganic fine powder of said pressing rotatable member being greater than an amount of the inorganic fine powder of said fixing rotatable member.
Claim 20
Dependent Claim
25 words
A fixing device according to claim 15, wherein the inorganic fine powder of said fixing rotatable member and of said pressing rotatable member is silica.
Claim 21
Dependent Claim
20 words
A fixing device according to claim 15, wherein said fixing rotatable member is in contact with the unfixed toner image.
Claim 22
Dependent Claim
39 words
A fixing device according to claim 15, wherein the device fixes an unfixed toner image carried on a first surface of the recording medium, thereafter, fixes an unfixed toner image carried on a second surface of the recording medium.
Claim 23
Dependent Claim
26 words
A fixing device according to claim 15, wherein the elastic layers of said fixing rotatable member and said pressing rotatable member are addition type silicone rubber.
Claim 24
Dependent Claim
32 words
A fixing device according to claim 15, wherein the amount of the inorganic fine powder contained in the elastic layer of said fixing rotatable member is 0.1 to 2 percent by weight.
Claim 25
Dependent Claim
32 words
A fixing device according to claim 15, wherein the amount of the inorganic fine powder contained in the elastic layer of said pressing rotatable member is 0.5 to 8 percent by weight.
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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) | 2000-03-03 | 2000-09-02 | 2001-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-03 | 2004-09-02 | 2005-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-03 | 2008-09-02 | 2009-03-04 | $7700.00 | Window Closed / Lapsed |