Patent US5636012A successfully refreshed from Google Patents.
US5636012A
Expired / Lapsed
US
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Toner image fixing device
Assignee: Konica Minolta Inc
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Filing: 1995-12-07
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Granted: 1997-06-03
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Expires: 2015-12-07
Abstract
Abstract A fixing device includes a fixing member, the surface of which composed of a fluororesin layer, a pressure member which is brought into contact with the surface of the fixing member; a heating member for fusing a toner image on a recording medium, which passes between the fixing member and pressure member, through the fixing member. The device further includes a hollow oil roller for coating toner repellent oil, which is accommodated inside a hollow of the roller, onto the surface of the fixing member. The outer layer of the oil roller is made of a porous layer into which a fluorine-containing surface active agent is impregnated.
Inventors
- 👤 Kazuhiko Uneme
- 👤 Masashi Saito
- 👤 Kazuo Yasuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:32
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
123 words
A fixing device comprising: (a) a fixing member, a surface of which comprises a fluorine containing resin layer; (b) a pressure member for applying a pressure to the surface of the fixing member; (c) a heating member for melting a toner image on a recording medium passing between the fixing member and the pressure member; and (d) an oil coating hollow roller storing a toner repellent oil inside a hollow portion thereof for coating the toner repellent oil onto the surface of the fixing member, wherein an outer layer of the oil coating hollow roller is a porous layer impregnated with a fluorine-containing surface active agent, and wherein the toner repellent oil is made of different material than the fluorine-containing surface active agent.
Claim 2
Dependent Claim
123 words
A fixing device comprising: (a) a fixing member, a surface of which comprises a fluorine containing resin layer; (b) a pressure member for applying a pressure to the surface of the fixing member; (c) a heating member for melting a toner image on a recording medium passing between the fixing member and the pressure member; and (d) an oil coating hollow roller storing a toner repellent oil inside a hollow portion thereof for coating the toner repellent oil onto the surface of the fixing member, wherein an outer layer of the oil coating hollow roller is a porous layer impregnated with a fluorine-containing surface active agent, and wherein the toner repellent oil is made of different material than the fluorine-containing surface active agent.
Claim 3
Dependent Claim
56 words
The fixing device of claim 1, wherein the fluorine-containing surface active agent is represented by the following formula: ##STR4## where X represents a saturated hydrocarbon having 1 to 4 carbon atoms or an aryl group, R f represents a fluoroalkyl group having 2 to 10 carbon atoms, and n represents an integer of 1 to 4.
Claim 4
Dependent Claim
19 words
The fixing device of claim 1, the fixing member is a form of roller having the heating member therein.
Claim 5
Dependent Claim
13 words
The fixing device of claim 1, the fixing member is a film material.
Claim 6
Dependent Claim
40 words
The fixing device of claim 1, wherein the toner repellent oil inside of the oil coating hollow roller is a fluorine-containing silicone oil, a coating amount of the fluorine-containing silicone oil is not more than 1.4×10 -6 cc/cm 2 .
Claim 7
Dependent Claim
20 words
The fixing device of claim 5, wherein surface tension of the fluorine-containing silicone oil is not more than 20 dyn/cm.
Claim 8
Dependent Claim
34 words
The fixing device of claim 4 further comprising a separation claw for separating the recording medium from the fixing roller, wherein the separation claw is provided separate from a surface of the fixing roller.
Claim 9
Dependent Claim
34 words
The fixing device of claim 5 further comprising a separation claw for separating the recording medium from the film material, wherein the separation claw is provided separate from a surface of the film material.
References Cited (Backward Citations)
US4757347A
Cited
US4928148A
Cited
US5285248A
Cited
US5157445A
Cited
US5232499A
Cited
US5157446A
Cited
US5177551A
Cited
US5267004A
Cited
US5500722A
Cited
US5235394A
Cited
US5278617A
Cited
US5482552A
Cited
US5493376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-02 | 2000-12-02 | 2001-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-02 | 2004-12-02 | 2005-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-02 | 2008-12-02 | 2009-06-03 | $7700.00 | Window Closed / Lapsed |