JPS56120819A - Sealing device for bearing - Google Patents
Sealing device for bearingInfo
- Publication number
- JPS56120819A JPS56120819A JP2336880A JP2336880A JPS56120819A JP S56120819 A JPS56120819 A JP S56120819A JP 2336880 A JP2336880 A JP 2336880A JP 2336880 A JP2336880 A JP 2336880A JP S56120819 A JPS56120819 A JP S56120819A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- shaft
- permanent magnet
- magnets
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Of Bearings (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
PURPOSE: To obtain an uncontact sealing effect in an electronic copying machine by providing two permanent magnets respectively on an inner shaft from the bearing and on a container wall near the inner shaft, both magnets arranged to oppose the same magntic pole so that a magnetic powder of a developer is prevented from flowing to the bearing by the magnetic field generated by the magnets.
CONSTITUTION: The shaft 2a of a feed roll 2 of a magnetic brush deveoping unit 1 of the electronic copying machine is supported by the bearing 3 mounted on a side frame 1a. Inside of the developing unit 1, the annular permanent magnet 5 is provided beside the inner side of the bearing 3 through a bush 4. The permanent magnet surrounds the shaft 2a loosely. The shaft 2a is mounted with another permanent magnet 6 so as to oppose the permanent magnet 5 with a little space therebetween. In this instance, the opposing poles of the respective permanent magnets are the same. Thus, magnetic fields 7 and a repulsive magnetic field 8 are generated, which prevents the magnetic powder of the developer within the developing unit 1 from going out to the bearing 3. Therefore, a sealing is established at the bearing in an uncontact state.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2336880A JPS56120819A (en) | 1980-02-28 | 1980-02-28 | Sealing device for bearing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2336880A JPS56120819A (en) | 1980-02-28 | 1980-02-28 | Sealing device for bearing |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56120819A true JPS56120819A (en) | 1981-09-22 |
JPS648211B2 JPS648211B2 (en) | 1989-02-13 |
Family
ID=12108605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2336880A Granted JPS56120819A (en) | 1980-02-28 | 1980-02-28 | Sealing device for bearing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56120819A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6231776A (en) * | 1985-08-02 | 1987-02-10 | Tohoku Metal Ind Ltd | Magnetic-fluid sealing device |
JPS63124075A (en) * | 1986-11-13 | 1988-05-27 | Fujitsu Ltd | Magnetic brush developing device |
US5177536A (en) * | 1989-03-31 | 1993-01-05 | Canon Kabushiki Kaisha | Developing apparatus having a magnetic seal |
US5267007A (en) * | 1989-08-04 | 1993-11-30 | Canon Kk | Magnetic seal for preventing developer from leaking out of the longitudinal ends of a rotatable member |
US5267003A (en) * | 1992-08-11 | 1993-11-30 | Olivetti Supplies, Inc. | Toner cartridge refilling seal using magnetic material |
US5287148A (en) * | 1990-07-10 | 1994-02-15 | Canon Kabushiki Kaisha | Magnetic seal for a developing apparatus |
US7986899B2 (en) * | 2008-09-05 | 2011-07-26 | Fuji Xerox Co., Ltd. | Development unit, process cartridge and image forming apparatus |
JP2011186213A (en) * | 2010-03-09 | 2011-09-22 | Ricoh Co Ltd | Developing device for electrophotographic-system image forming apparatus |
DE10218937B4 (en) * | 2002-04-27 | 2013-04-25 | Schaeffler Technologies AG & Co. KG | Protective device for a rolling bearing with speed measurement |
CN111963688A (en) * | 2020-08-12 | 2020-11-20 | 清华大学 | Multistage multipolar magnetic powder sealing device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53109185U (en) * | 1977-02-08 | 1978-09-01 |
-
1980
- 1980-02-28 JP JP2336880A patent/JPS56120819A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53109185U (en) * | 1977-02-08 | 1978-09-01 |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6231776A (en) * | 1985-08-02 | 1987-02-10 | Tohoku Metal Ind Ltd | Magnetic-fluid sealing device |
JPH0520627B2 (en) * | 1985-08-02 | 1993-03-22 | Tokin Corp | |
JPS63124075A (en) * | 1986-11-13 | 1988-05-27 | Fujitsu Ltd | Magnetic brush developing device |
US5177536A (en) * | 1989-03-31 | 1993-01-05 | Canon Kabushiki Kaisha | Developing apparatus having a magnetic seal |
US5267007A (en) * | 1989-08-04 | 1993-11-30 | Canon Kk | Magnetic seal for preventing developer from leaking out of the longitudinal ends of a rotatable member |
US5287148A (en) * | 1990-07-10 | 1994-02-15 | Canon Kabushiki Kaisha | Magnetic seal for a developing apparatus |
US5267003A (en) * | 1992-08-11 | 1993-11-30 | Olivetti Supplies, Inc. | Toner cartridge refilling seal using magnetic material |
DE10218937B4 (en) * | 2002-04-27 | 2013-04-25 | Schaeffler Technologies AG & Co. KG | Protective device for a rolling bearing with speed measurement |
US7986899B2 (en) * | 2008-09-05 | 2011-07-26 | Fuji Xerox Co., Ltd. | Development unit, process cartridge and image forming apparatus |
JP2011186213A (en) * | 2010-03-09 | 2011-09-22 | Ricoh Co Ltd | Developing device for electrophotographic-system image forming apparatus |
CN111963688A (en) * | 2020-08-12 | 2020-11-20 | 清华大学 | Multistage multipolar magnetic powder sealing device |
CN111963688B (en) * | 2020-08-12 | 2021-11-09 | 清华大学 | Multistage multipolar magnetic powder sealing device |
Also Published As
Publication number | Publication date |
---|---|
JPS648211B2 (en) | 1989-02-13 |
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