Patent US3460362A successfully refreshed from Google Patents.
Patent US4380966A successfully refreshed from Google Patents.
US4380966A
Expired / Lapsed
US
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Development apparatus
Assignee: Canon Inc
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Filing: 1981-10-07
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Granted: 1983-04-26
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Expires: 2001-10-07
Abstract
Abstract A development apparatus has a developer supporting member having a magnet therein and a thickness controlling member for the developer, the developer being a magnetic one-component developer which is applied to the surface of the developer supporting member by means of the thickness controlling member, the applied surface of the developer supporting member being brought into a position opposed to a latent-image carrying member to develop the latent image thereon, the surface of the developer supporting member being roughened by sand blast treatment with irregularly shaped and/or sized particles.
Inventors
- 👤 Kazuo Isaka
- 👤 Kimio Nakahata
- 👤 Masaaki Sakurai
- 👤 Tsuyoshi Watanabe
- 👤 Fumitaka Kan
- 👤 Kenji Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:20
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/0921; G03G15/0928; C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/16
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
113 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: developer supporting means for carrying developer on its surface; magnetic-field producing means enclosed by said developer supporting means; means for supplying one-component magnetic developer to said developer supporting means; and means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means; the surface of said developer supporting means being roughened by sand blast treatment, wherein the pitch of said roughened surface is in the range of 2 to 50μ and the surface roughness of said roughened surface is in the range of 0.1 to 8μ.
Claim 2
Independent Claim
113 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: developer supporting means for carrying developer on its surface; magnetic-field producing means enclosed by said developer supporting means; means for supplying one-component magnetic developer to said developer supporting means; and means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means; the surface of said developer supporting means being roughened by sand blast treatment, wherein the pitch of said roughened surface is in the range of 2 to 50μ and the surface roughness of said roughened surface is in the range of 0.1 to 8μ.
Claim 3
Dependent Claim
20 words
An apparatus defined in claim 1 wherein said sand blast treatment is carried out by use of irregularly shaped particles.
Claim 4
Independent Claim
85 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: developer supporting means for carrying developer on its surface; magnetic-field producing means enclosed by said developer supporting means; means for supplying one-component magnetic developer to said developer supporting means; and means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means; the surface of said developer supporting means being roughened by sand blast treatment and then plated.
Claim 5
Independent Claim
85 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: developer supporting means for carrying developer on its surface; magnetic-field producing means enclosed by said developer supporting means; means for supplying one-component magnetic developer to said developer supporting means; and means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means; the surface of said developer supporting means being roughened by sand blast treatment and then plated.
Claim 6
Dependent Claim
20 words
An apparatus defined in claim 3 wherein said sand blast treatment is carried out by use of irregularly shaped particles.
Claim 7
Dependent Claim
21 words
An apparatus defined in claim 3 wherein the pitch in said roughened surface is in the range of 2 to 50μ.
Claim 8
Dependent Claim
22 words
An apparatus defined in claim 3 wherein the surface roughened in said roughed surface is in the range of 0.1 to 8μ.
Claim 9
Dependent Claim
13 words
An apparatus defined in claim 3 wherein said plating is hard chrome plating.
Claim 10
Dependent Claim
21 words
An apparatus defined in claim 3 or 7 wherein said plating is in the range of 1 to 20μ in thickness.
Claim 11
Independent Claim
89 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: developer supporting means for carrying developer on its surface; magnetic-field producing means enclosed by said developer supporting means; means for supplying one-component magnetic developer to said developer supporting means; and means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means; the surface of said developer supporting means being roughened by sand blast treatment and thereafter subjected to anodized aluminum treatment.
Claim 12
Independent Claim
89 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: developer supporting means for carrying developer on its surface; magnetic-field producing means enclosed by said developer supporting means; means for supplying one-component magnetic developer to said developer supporting means; and means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means; the surface of said developer supporting means being roughened by sand blast treatment and thereafter subjected to anodized aluminum treatment.
Claim 13
Dependent Claim
20 words
An apparatus defined in claim 9 wherein said sand blast treatment is carried out by use of irregularly shaped particles.
Claim 14
Dependent Claim
21 words
An apparatus defined in claim 9 wherein the pitch in said roughened surface is in the range of 2 to 50μ.
Claim 15
Dependent Claim
22 words
An apparatus defined in claim 9 wherein the surface roughened in said roughed surface is in the range of 0.1 to 8μ.
Claim 16
Dependent Claim
27 words
An apparatus defined in claim 9 wherein the anodized aluminum layer on said developer supporting means formed by said anodized aluminum treatment consists of anodized hard aluminum.
Claim 17
Dependent Claim
29 words
An apparatus defined in claim 9 or 13 wherein the anodized aluminum layer formed by said anodized aluminum treatment is in the range of 5 to 50μ in thickness.
Claim 18
Dependent Claim
22 words
An apparatus defined in claim 9 wherein said sand blast treatment is carried out by use of regularly shaped and sized particles.
Claim 19
Independent Claim
93 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: developer supporting means for carrying developer on its surface; magnetic-field producing means enclosed by said developer supporting means; means for supplying one-component magnetic developer to said developer supporting means; and means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means; the surface of said developer supporting means being subjected to anodized aluminum treatment and thereafter roughened by sand blast treatment with irregularly shaped particles.
Claim 20
Independent Claim
93 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: developer supporting means for carrying developer on its surface; magnetic-field producing means enclosed by said developer supporting means; means for supplying one-component magnetic developer to said developer supporting means; and means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means; the surface of said developer supporting means being subjected to anodized aluminum treatment and thereafter roughened by sand blast treatment with irregularly shaped particles.
Claim 21
Dependent Claim
21 words
An apparatus defined in claim 16 wherein the pitch in said roughened surface is in the range of 2 to 50μ.
Claim 22
Dependent Claim
22 words
An apparatus defined in claim 16 wherein the surface roughened in said roughed surface is in the range of 0.1 to 8μ.
Claim 23
Dependent Claim
22 words
An apparatus defined in claim 16 wherein the anodized aluminum layer formed by said anodized aluminum treatment consists of anodized hard aluminum.
Claim 24
Dependent Claim
29 words
An apparatus defined in claim 16 or 19 wherein the anodized aluminum layer formed by said anodized aluminum treatment is in the range of 5 to 50μ in thickness.
Claim 25
Dependent Claim
36 words
An apparatus defined in claim 20 wherein the anodized aluminum layer is formed by said anodized aluminum treatment in a larger thickness and thereafter ground into the desired thickness in the range of 5 to 50μ.
Claim 26
Independent Claim
93 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: developer supporting means for carrying developer on its surface; magnetic-field producing means enclosed by said developer supporting means; means for supplying one-component magnetic developer to said developer supporting means; and means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means; the surface of said developer supporting means being subjected to anodized aluminum treatment and thereafter roughened by sand blast treatment with regularly shaped particles.
Claim 27
Independent Claim
93 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: developer supporting means for carrying developer on its surface; magnetic-field producing means enclosed by said developer supporting means; means for supplying one-component magnetic developer to said developer supporting means; and means, disposed adjacent to said developer supporting means, for controlling the amount of said developer on the surface of said developer supporting means; the surface of said developer supporting means being subjected to anodized aluminum treatment and thereafter roughened by sand blast treatment with regularly shaped particles.
Claim 28
Dependent Claim
21 words
An apparatus defined in claim 22 wherein the pitch in said roughened surface is in the range of 2 to 50μ.
Claim 29
Dependent Claim
22 words
An apparatus defined in claim 22 wherein the surface roughness in said roughened surface is in the range of 0.1 to 8μ.
Claim 30
Dependent Claim
22 words
An apparatus defined in claim 22 wherein the anodized aluminum layer formed by said anodized aluminum treatment consists of anodized hard aluminum.
Claim 31
Dependent Claim
29 words
An apparatus defined in claim 22 or 25 wherein the anodized aluminum layer formed by said anodized aluminum treatment is in the range of 5 to 50μ in thickness.
Claim 32
Dependent Claim
36 words
An apparatus defined in claim 26 wherein the anodized aluminum layer is formed by said anodized aluminum treatment in a larger thickness and thereafter ground into the desired thickness in the range of 5 to 50μ.
Claim 33
Dependent Claim
31 words
An apparatus defined in claim 1, 3, 9, 16 or 22 wherein the particles used in said sand blast treatment are in the range of #300 to #800 in particle size.
Claim 34
Dependent Claim
39 words
An apparatus defined in claim 1, 3, 9, 16 or 22 wherein the pitch in said roughened surface is in the range of 5 to 30μ and the surface roughness therein is in the range of 0.3 to 3.0μ.
Claim 35
Dependent Claim
40 words
An apparatus defined in claim 2, 4, 10 or 16 wherein said irregularly shaped particles are selected from the group consisting of Al 2 O 3 , SiO 2 , Fe 2 O 3 , SiC and TiO 2 .
Claim 36
Dependent Claim
27 words
An apparatus defined in claim 15 or 22 wherein said regularly shaped particles are selected from the group consisting of glass beads, steel balls and ferite balls.
Claim 37
Dependent Claim
44 words
An apparatus defined in claim 1, 3, 9, 16 or 22 wherein said means for controlling the amount of said developer is in the form of magnetic blade and wherein said magnetic-field producing means includes a magnetic pole located opposed to said magnetic blade.
Claim 38
Dependent Claim
42 words
An apparatus defined in claim 32 wherein said magnetic blade is adapted to control the developer on said developer supporting means into the desired thickness equal to or less than the gap between said developer supporting means and said latent-image carrying means.
Claim 39
Dependent Claim
26 words
An apparatus defined in claim 33 wherein an electric alternating field is applied to the gap between said developer supporting means and said latent-image carrying means.
Claim 40
Dependent Claim
26 words
An apparatus defined in claim 34 wherein the roughened surface of said developer supporting means has a surface roughness in the range of 0.1 to 4μ.
Claim 41
Independent Claim
161 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: a movable sleeve of non-magnetic material for carrying one-component magnetic toner on its surface; a magnet roller fixedly disposed within said sleeve; means for supplying said one-component magnetic toner to said surface of said sleeve; a magnetic doctor blade for controlling the thickness of the magnetic toner layer formed on said sleeve, said doctor blade being disposed opposed to the magnetic pole of said magnet roller to form a magnetic field between said magnetic blade and said magnet roller by which said magnetic toner layer will be controlled into a uniform thickness less than the gap between said sleeve and said latent-image carrying means; and means for applying an electric alternating field to the gap between said sleeve and said latent-image carrying means; the surface of said sleeve being subjected to anodized aluminum treatment and thereafter roughened by sand blast treatment with irregularly shaped particles.
Claim 42
Independent Claim
161 words
An apparatus for developing latent images on latent-image carrying means by the application of developer, comprising: a movable sleeve of non-magnetic material for carrying one-component magnetic toner on its surface; a magnet roller fixedly disposed within said sleeve; means for supplying said one-component magnetic toner to said surface of said sleeve; a magnetic doctor blade for controlling the thickness of the magnetic toner layer formed on said sleeve, said doctor blade being disposed opposed to the magnetic pole of said magnet roller to form a magnetic field between said magnetic blade and said magnet roller by which said magnetic toner layer will be controlled into a uniform thickness less than the gap between said sleeve and said latent-image carrying means; and means for applying an electric alternating field to the gap between said sleeve and said latent-image carrying means; the surface of said sleeve being subjected to anodized aluminum treatment and thereafter roughened by sand blast treatment with irregularly shaped particles.
Claim 43
Dependent Claim
24 words
An apparatus defined in claim 36 wherein the pitch in said roughened surface of said sleeve is in the range of 2 to 50μ.
Claim 44
Dependent Claim
22 words
An apparatus defined in claim 36 wherein the surface roughness in said roughened surface is in the range of 0.1 to 8μ.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |