JPS5766454A - Magnetic brush development device - Google Patents
Magnetic brush development deviceInfo
- Publication number
- JPS5766454A JPS5766454A JP14279380A JP14279380A JPS5766454A JP S5766454 A JPS5766454 A JP S5766454A JP 14279380 A JP14279380 A JP 14279380A JP 14279380 A JP14279380 A JP 14279380A JP S5766454 A JPS5766454 A JP S5766454A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- doctor
- magnetic
- napping
- sleeve
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
PURPOSE:To prevent a toner blocking phenomenon at napping doctor part and to remove foreign matters such as powdery paper, from toner, by restricting the thickness of a magnetic developer in two stages by a magnetic doctor and then a nonmagnetic-material napping doctor. CONSTITUTION:On the peripheric surface of a nonmagnetic-material sleeve 12 having a magnet 3 internally, a magnetic doctor 14 and a napping doctor 13 are provided. Magnetic toner is made into a toner chain by the doctor 14 and magnet at a magnetic doctor part, and this chain is cut to apply an adequate amount of toner onto the sleeve. In this case, nonmagnetic foreign matters such as powdery paper, never form a chain, so it is neither mixed nor applied onto the sleeve. The toner on the sleeve is napped by the napping doctor to excellent height and carried to a development part A. The toner which does not contribute to the development is carried to a developer carrier roller 11 at need and mixed with fresh toner.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14279380A JPS5766454A (en) | 1980-10-13 | 1980-10-13 | Magnetic brush development device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14279380A JPS5766454A (en) | 1980-10-13 | 1980-10-13 | Magnetic brush development device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5766454A true JPS5766454A (en) | 1982-04-22 |
Family
ID=15323736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14279380A Pending JPS5766454A (en) | 1980-10-13 | 1980-10-13 | Magnetic brush development device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5766454A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60257466A (en) * | 1984-06-01 | 1985-12-19 | Minolta Camera Co Ltd | Dry developing device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5387740A (en) * | 1977-01-12 | 1978-08-02 | Canon Inc | Developing device |
JPS5489740A (en) * | 1977-12-27 | 1979-07-17 | Canon Inc | Electrostatic image developing device |
JPS54124729A (en) * | 1978-03-20 | 1979-09-27 | Ricoh Co Ltd | Direct recorder |
-
1980
- 1980-10-13 JP JP14279380A patent/JPS5766454A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5387740A (en) * | 1977-01-12 | 1978-08-02 | Canon Inc | Developing device |
JPS5489740A (en) * | 1977-12-27 | 1979-07-17 | Canon Inc | Electrostatic image developing device |
JPS54124729A (en) * | 1978-03-20 | 1979-09-27 | Ricoh Co Ltd | Direct recorder |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60257466A (en) * | 1984-06-01 | 1985-12-19 | Minolta Camera Co Ltd | Dry developing device |
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