EP0513822A2
Expired / Lapsed
EP
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Fixing roll
Assignee: Kinyosha Co Ltd
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Filing: 1992-05-15
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Granted: —
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Expires: 2012-05-15
Abstract
Abstract Disclosed is a fixing roll, comprising a core metal, a heat resistant elastic layer formed to cover the circumferential outer surface of the core metal, and a surface layer formed to cover the circumferential outer surface of the heat resistant elastic layer, the surface layer being formed of a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin film of a double layer structure consisting of an inner layer having a volume resistivity of 10 11 Ω • cm or less and an outer layer having a thickness falling within a range of between 3 µm and 50 µm, and the entire thickness of the resin film falling within a range of between 20 µm and 500 µm.
Inventors
- 👤 Noritomo Fukunaga
- 👤 Michiyoshi Kurosawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 12:02
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; G03G15/206
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
120 words
A fixing roll, comprising a core metal (12), a heat resistant elastic layer (11) formed to cover the circumferential outer surface of said core metal (12), and a surface layer formed to cover the circumferential outer surface of said heat resistant elastic layer (11), said surface layer being formed of a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin film (13) of a double layer structure consisting of an inner layer (13a) having a volume resistivity of 10 11 Ω • cm or less and an outer layer (13b) having a thickness falling within a range of between 3 µm and 50 µm, and the total thickness of said resin film (13) falling within a range of between 20 µm and 500 µm.
Claim 2
Dependent Claim
120 words
A fixing roll, comprising a core metal (12), a heat resistant elastic layer (11) formed to cover the circumferential outer surface of said core metal (12), and a surface layer formed to cover the circumferential outer surface of said heat resistant elastic layer (11), said surface layer being formed of a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin film (13) of a double layer structure consisting of an inner layer (13a) having a volume resistivity of 10 11 Ω • cm or less and an outer layer (13b) having a thickness falling within a range of between 3 µm and 50 µm, and the total thickness of said resin film (13) falling within a range of between 20 µm and 500 µm.
Claim 3
Dependent Claim
43 words
The fixing roll according to claim 1, characterized in that said heat resistant elastic layer (11) is formed of a material selected from the group consisting of silicone rubber, fluorine rubber, ethylene-propylene rubber, silicone rubber sponge, fluorine rubber sponge and ethylene-propylene rubber sponge.
Claim 4
Dependent Claim
69 words
The fixing roll according to claim 1 or 2, characterized in that said heat resistant elastic layer (11) contains at least one additive selected from the group consisting of a material for imparting a high thermal conductivity to the heat resistant elastic layer (11), a material for imparting an electrical conductivity to the heat resistant elastic layer (11), an antistatic agent, a heat resistant additive, and a coloring material.
Claim 5
Dependent Claim
38 words
The fixing roll according to claim 3, characterized in that said material for imparting a high thermal conductivity to the heat resistant elastic layer (11) is selected from the group consisting of Aℓ 2 O 3 and SiC.
Claim 6
Dependent Claim
27 words
The fixing roll according to claim 3, characterized in that said material for imparting a high thermal conductivity to the heat resistant elastic layer (11) is carbon.
Claim 7
Dependent Claim
59 words
The fixing roll according to one of claims 1 to 5, characterized in that said inner layer (13a) of the resin film (13) forming the surface layer is formed of a composite material prepared by adding at least one material selected from the group consisting of carbon black, metal powder and metal-coated filler to tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin.
Claim 8
Dependent Claim
35 words
The fixing roll according to one of claims 1 to 6, characterized in that said outer layer (13b) of the resin film (13) forming the surface layer is formed of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin.
Claim 9
Dependent Claim
38 words
The fixing roll according to one of claims 1 to 7, characterized in that said outer layer (13b) of the resin film (13) forming the surface layer has a volume resistivity of 10 16 f2 cm or more.
References Cited (Backward Citations)
No citation records indexed.
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