Patent EP0510643A2 successfully refreshed from Google Patents.
EP0510643A2
Expired / Lapsed
EP
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Charging member and device using the same
Assignee: Canon Inc
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Filing: 1992-04-23
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Granted: —
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Expires: 2012-04-23
Abstract
Abstract A charging member includes at least inner and outer resistance layers formed on an electrically-conductive substrate. Electrically-conductive particles dispersed in the matrix of the outer resistance layer are reduced titanium oxide which is represented by the following general formula: TiOn where n is a number not more than 1.9.
Inventors
- 👤 Jun c/o Canon Kabushiki Kaisha Murata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 10:46
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1665; G03G15/167; G03G15/1685; G03G15/02; G03G15/0208; G03G15/0216; G03G15/0233
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
57 words
A charging member comprising: at least two resistance layers in which electrically-conductive particles are dispersed, these two resistance layers being formed on an electrically-conductive substrate, the electrically-conductive particles dispersed in a matrix of an outer resistance layer being reduced titanium oxide represented by the following general formula: TiOn where n is a number not more than 1.9.
Claim 2
Dependent Claim
34 words
A charging member according to claim 1, wherein the ratio of the number of atoms of titanium to the number of atoms of oxygen in the general formula TiOn is not larger than 1:1.
Claim 3
Dependent Claim
14 words
A charging member according to claim 1, wherein the electrically-conductive particles are titanium monoxide.
Claim 4
Dependent Claim
37 words
A charging member according to claim 1, wherein an inner resistance layer is formed of a silicone rubber elastic member in which carbon black having an oil absorption of not more than 80 ml/100 g is dispersed.
Claim 5
Dependent Claim
19 words
A charging member according to claim 1, wherein the inner resistance layer contains 15 to 40 wt% carbon black.
Claim 6
Dependent Claim
33 words
A charging member according to claim 1, wherein the hardness of the inner resistance layer is 20 to 40, and the resistance value of the inner resistance layer is 10³ to 10⁷ Ω.
Claim 7
Dependent Claim
24 words
A charging member according to claim 1, wherein a matrix of the inner resistance layer is dimethylpolysiloxane containing 0.05 to 0.005 wt% vinyl group.
Claim 8
Dependent Claim
21 words
A charging member according to claim 1 further comprising a primer layer containing a silane coupling agent between the resistance layers.
Claim 9
Dependent Claim
23 words
A charging member according to claims 1 to 8 being used for transfer charge which transfers an image developed onto a transfer member.
Claim 10
Independent Claim
81 words
A device in which at least one of developing means and cleaning means is supported integrally with charging means and a photosensitive member and is formed into a unit which is detachably attached to the device, wherein the charging means has at least two resistance layers on an electrically-conductive substrate, electrically-conductive particles dispersed in a matrix of an outer resistance layer being reduced titanium oxide represented by the following general formula: TiOn where n is a number not more than 1.9.
Claim 11
Dependent Claim
32 words
A device according to claim 10, wherein the hardness of the inner resistance layer is 20 to 40, and the resistance value of the inner resistance layer is 10³ to 10⁷ Ω.
Claim 12
Dependent Claim
103 words
An electrophotographic device comprising: a photosensitive member; means for developing a latent image formed on latent image forming means; and means for transferring the developed image onto a transfer member, wherein at least one of a charging member for supplying charge to the latent image forming means and another charging member for transfer-charging the developed image onto the transfer member has at least two resistance layers on an electrically-conductive substrate, and wherein electrically-conductive particles dispersed in a matrix of an outer resistance layer are reduced titanium oxide represented by the following general formula: TiOn where n is a number not more than 1.9.
Claim 13
Dependent Claim
37 words
An electrophotographic device according to claim 12, wherein the hardness of the inner resistance layer of the charging member is 20 to 40, and the resistance value of the inner resistance layer is 10³ to 10⁷ Ω.
Claim 14
Dependent Claim
104 words
A facsimile device comprising: a photosensitive member; means for forming a latent image; means for developing the latent image formed; and means for transferring the developed image onto a transfer member, wherein at least one of a charging member for supplying charge to the latent image forming means and another charging member for transfer-charging the developed image onto the transfer member has at least two resistance layers on an electrically-conductive substrate, and wherein electrically-conductive particles dispersed in a matrix of an outer resistance layer are reduced titanium oxide represented by the following general formula: TiOn where n is a number not more than 1.9.
Claim 15
Dependent Claim
37 words
A facsimile device according to claim 14, wherein the hardness of the inner resistance layer of the charging member is 20 to 40, and the resistance value of the inner resistance layer is 10³ to 10⁷ Ω.
References Cited (Backward Citations)
No citation records indexed.
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