Patent EP0138458A2 successfully refreshed from Google Patents.
EP0138458A2
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EP
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Developing apparatus
Assignee: Toshiba Corp
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Filing: 1984-09-26
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Granted: —
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Expires: 2004-09-26
Abstract
Abstract A developing apparatus comprises a developing roll (11) for carrying a nonmagnetic toner (17) thereon, and an elastic blade (13) pressed against the outer circumferential surface of the developing roll (11) to apply the toner (17) thereto. The toner (17) is applied to the surface of the developing roll (11) by the elastic blade (13) to form a thin layer of the toner (17) on the surface of the developing roll (11) The thin layer is opposed to a photosensitive body (15) to deposit the toner (17) on a latent image on the photosensitive body (15). The developing roll (11) has a surface (12) which is opposite to the photosensitive body (15) and the whole of which is roughened.
Inventors
- 👤 Masahiro C/O Patent Division Hosoya
- 👤 Tsutomu C/O Patent Division Uehara
- 👤 Shinya C/O Patent Division Tomura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 20:16
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0818; G03G2215/00; G03G2215/06; G03G2215/0602; G03G2215/0604; G03G2215/0614; G03G2215/0619; G03G2215/0634; G03G2215/0636; G03G2215/0641
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
120 words
A developing apparatus comprising: a developing agent carrier for carrying a developing agent thereon; and an elastic member pressed against the surface of the developing agent carrier to apply the developing agent thereto, so that the developing agent is applied to the surface of the developing agent carrier by the elastic member to form a thin layer of the developing agent on the surface of the developing agent carrier, and that the thin layer is opposed to an image carrier to deposit the developing agent on a latent image on the image carrier, characterized in that said developing agent carrier (11) has a surface (12) which is opposite to the image carrier (15) and the whole of which is roughened.
Claim 2
Dependent Claim
120 words
A developing apparatus comprising: a developing agent carrier for carrying a developing agent thereon; and an elastic member pressed against the surface of the developing agent carrier to apply the developing agent thereto, so that the developing agent is applied to the surface of the developing agent carrier by the elastic member to form a thin layer of the developing agent on the surface of the developing agent carrier, and that the thin layer is opposed to an image carrier to deposit the developing agent on a latent image on the image carrier, characterized in that said developing agent carrier (11) has a surface (12) which is opposite to the image carrier (15) and the whole of which is roughened.
Claim 3
Dependent Claim
21 words
The developing apparatus according to claim 1, characterized in that said elastic member is formed of a thin metal blade (13).
Claim 4
Dependent Claim
20 words
The developing apparatus according to claim 2, characterized in that said thin metal blade (13) is made of phosphor bronze.
Claim 5
Dependent Claim
33 words
The developing apparatus according to claim 3, characterized in that a surface roughness of said developing agent carrier (11) is 0.07 to 1.0 times of an average diameter of nonmagnetic toner particles (17).
Claim 6
Dependent Claim
32 words
The developing apparatus according to claim 4, characterized in that said metal blade (13) is pressed against said developing agent carrier (11) at a pressing force of 100 g/cm to 2,500 g/cm.
Claim 7
Dependent Claim
22 words
The developing apparatus according to claim 4, characterized in that said metal blade (13) has a thickness of 0.1 to 0.4 mm.
Claim 8
Dependent Claim
20 words
The developing apparatus according to claim 1, characterized in that said elastic member is formed of a rubber blade (19).
Claim 9
Dependent Claim
17 words
The developing apparatus according to claim 7, characterized in'that said rubber blade (19) is made of polyurethane.
Claim 10
Dependent Claim
37 words
The developing apparatus according to claim 8, characterized in that a surface roughness of said roughened surface of said developing agent carrier (11) is 0.07 to 1.5 times of an average diameter of nonmagnetic toner particles (17).
Claim 11
Dependent Claim
51 words
The developing apparatus according to claim 1, characterized in that said developing agent carrier (11) is disposed to be spaced apart by a predetermined distance from said image carrier (15), and a thickness of said thin layer of said developing agent (17) is set to be smaller than said predetermined distance.
Claim 12
Dependent Claim
31 words
The developing apparatus according to claim 1, characterized in that said developing agent carrier (11) has a hard layer which is formed on the roughened surface thereof by a hard-plating treatment.
Claim 13
Dependent Claim
39 words
The developing apparatus according to claim 1, characterized by further comprising: a power source (14), electrically connected to said developing agent carrier (11) and said elastic member (13), for applying a bias voltage to said developing agent carrier (11).
Claim 14
Dependent Claim
47 words
The developing apparatus according to claim 1, characterized in that, of end faces of said elastic member (13 or 19), at least an end face positioned adjacent to a surface of said developing agent carrier (11) has a moderately curved surface (13a or 19a) formed by polishing.
Claim 15
Dependent Claim
40 words
The developing apparatus according to claim 1, characterized in that a surface of the elastic member (13 or 19) except for the free end portion thereof is brought into surface contact with the surface of the developing agent carrier (11).
References Cited (Backward Citations)
No citation records indexed.
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