Patent US5162858A successfully refreshed from Google Patents.
US5162858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning blade and apparatus employing the same
Assignee: Canon Inc
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Filing: 1990-12-27
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Granted: 1992-11-10
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Expires: 2010-12-27
Abstract
Abstract The present invention provides a cleaning blade of a cleaning device for eliminating remaining toner powder from a surface of an image-holding member. The cleaning blade is constituted of silicone rubber. The silicone rubber contains not more than 5% by weight of a low-viscosity organosiloxane component, has rubber hardness within the range of from 40° to 90°, and cause permanent compression set of not more than 20% according to JIS A.
Inventors
- 👤 Takeo Shoji
- 👤 Hiroshi Sasame
- 👤 Hiroyuki Adachi
- 👤 Masahiro Watabe
- 👤 Noriyuki Yanai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:02
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0011; G03G21/0017; C; C08; C08L; C08L83/00; C08L83/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
94 words
A cleaning blade of a cleaning device for eliminating remaining toner powder from a surface of an image-holding member, said cleaning blade being constituted of silicone rubber, and said silicone rubber; (a) containing not more than 5% by weight of a low-viscosity organosiloxane component, (b) having a rubber hardness within the range of from 40° to 90°, and (c) exhibiting a permanent compression set of not more than 20% according to JIS A, wherein the silicone rubber of the cleaning blade contains a silica filler having a particle diameter of not more than 1μ.
Claim 2
Dependent Claim
94 words
A cleaning blade of a cleaning device for eliminating remaining toner powder from a surface of an image-holding member, said cleaning blade being constituted of silicone rubber, and said silicone rubber; (a) containing not more than 5% by weight of a low-viscosity organosiloxane component, (b) having a rubber hardness within the range of from 40° to 90°, and (c) exhibiting a permanent compression set of not more than 20% according to JIS A, wherein the silicone rubber of the cleaning blade contains a silica filler having a particle diameter of not more than 1μ.
Claim 3
Dependent Claim
14 words
The cleaning blade of claim 1, wherein the silica has been treated for hydrophobicity.
Claim 4
Dependent Claim
41 words
The cleaning blade of claim 1, wherein a supporting member of holding the cleaning blade is placed in a mold for molding the cleaning blade, and the cleaning blade is molded with the supporting member in one body by injection molding.
Claim 5
Dependent Claim
21 words
The cleaning blade of claim 1, wherein the cleaning blade is formed from an addition reaction type of liquid silicone rubber.
Claim 6
Independent Claim
110 words
An apparatus unit mountable to and demountable from a main apparatus, said unit being constructed from at least one of a charging means and a developing means, together with a cleaning blade in one unit, said cleaning blade being constituted of silicone rubber, and said silicone rubber: (a) containing not more than 5% by weight of a low-viscosity organosiloxane component, (b) having a rubber hardness within the range of from 40° to 90°, and (c) exhibiting a permanent compression set of not more than 20% according to JIS A, wherein the silicone rubber of the cleaning blade contains a silica filler having a particle diameter of not more than 1μ.
Claim 7
Independent Claim
110 words
An apparatus unit mountable to and demountable from a main apparatus, said unit being constructed from at least one of a charging means and a developing means, together with a cleaning blade in one unit, said cleaning blade being constituted of silicone rubber, and said silicone rubber: (a) containing not more than 5% by weight of a low-viscosity organosiloxane component, (b) having a rubber hardness within the range of from 40° to 90°, and (c) exhibiting a permanent compression set of not more than 20% according to JIS A, wherein the silicone rubber of the cleaning blade contains a silica filler having a particle diameter of not more than 1μ.
Claim 8
Dependent Claim
117 words
An electrophotographic apparatus comprising: (a) a photosensitive member, (b) a latent image forming member, (c) a developing means for developing a formed latent image, (d) a transfer means for transferring a developed image onto a transfer-receiving material, and (e) a cleaning blade, said cleaning blade being constituted of silicone rubber, said silicone rubber: (1) containing not more than 5% by weight of a low-viscosity organosiloxane component, (2) having a rubber hardness within the range of from 40° to 90°, and (3) exhibiting a permanent compression set of not more than 20% according to JIS A, wherein the silicone rubber of the cleaning blade contains a silica filler having a particle diameter of not more than 1μ. μ.
Claim 9
Dependent Claim
117 words
An electrophotographic apparatus comprising: (a) a photosensitive member, (b) a latent image forming member, (c) a developing means for developing a formed latent image, (d) a transfer means for transferring a developed image onto a transfer-receiving material, and (e) a cleaning blade, said cleaning blade being constituted of silicone rubber, said silicone rubber: (1) containing not more than 5% by weight of a low-viscosity organosiloxane component, (2) having a rubber hardness within the range of from 40° to 90°, and (3) exhibiting a permanent compression set of not more than 20% according to JIS A, wherein the silicone rubber of the cleaning blade contains a silica filler having a particle diameter of not more than 1μ. μ.
Claim 10
Dependent Claim
137 words
A facsimile apparatus comprising: (a) an electrophotographic apparatus and (b) receiving means for receiving an image information from a remote terminal, said electrophotographic apparatus comprising: (1) a photosensitive member, (2) a latent image forming member, (3) a developing means for developing a formed latent image, (4) a transfer means for transferring a developed image onto a transfer-receiving material, and (5) a cleaning blade, said cleaning blade being constituted of silicone rubber, said silicone rubber: (i) containing not more than 5% by weight of a low-viscosity organosiloxane component, (ii) having a rubber hardness within the range of from 40° to 90°, and (iii) exhibiting a permanent compression set of not more than 20% according to JIS A, wherein the silicone rubber of the cleaning blade contains a silica filler having a particle diameter of not more than 1μ.
Claim 11
Dependent Claim
137 words
A facsimile apparatus comprising: (a) an electrophotographic apparatus and (b) receiving means for receiving an image information from a remote terminal, said electrophotographic apparatus comprising: (1) a photosensitive member, (2) a latent image forming member, (3) a developing means for developing a formed latent image, (4) a transfer means for transferring a developed image onto a transfer-receiving material, and (5) a cleaning blade, said cleaning blade being constituted of silicone rubber, said silicone rubber: (i) containing not more than 5% by weight of a low-viscosity organosiloxane component, (ii) having a rubber hardness within the range of from 40° to 90°, and (iii) exhibiting a permanent compression set of not more than 20% according to JIS A, wherein the silicone rubber of the cleaning blade contains a silica filler having a particle diameter of not more than 1μ.
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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) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |