US5636012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toner image fixing device
Assignee: Konica Minolta Inc
•
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 05:44
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.
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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) | 2000-06-02 | 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 |