JPS6482069A - Developing device for copying machine - Google Patents
Developing device for copying machineInfo
- Publication number
- JPS6482069A JPS6482069A JP62241643A JP24164387A JPS6482069A JP S6482069 A JPS6482069 A JP S6482069A JP 62241643 A JP62241643 A JP 62241643A JP 24164387 A JP24164387 A JP 24164387A JP S6482069 A JPS6482069 A JP S6482069A
- Authority
- JP
- Japan
- Prior art keywords
- blocking plate
- closing
- angle
- developer
- roller
- 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
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Color Electrophotography (AREA)
Abstract
PURPOSE:To secure switching between a development and a nondevelopment state and to cut stable napping by providing a blocking plate to a passage which supplies a developer to a development part, opening and closing the passage and making the closing angle of the blocking plate larger than the opening angle. CONSTITUTION:The developer is supplied to a developing roller 22 through an agitating roller 25, and sent to a conveyor roller 23 after the end and supplied again to the roller 25 along a scraping plate 26. When development becomes unnecessary, the blocking plate 38 rotates by 90 deg. through a spring clutch to close supply passages 35a and 35b. At this time, when the opening angle and closing angle of the blocking plate 38 are equal to each other, the variance of the clutch part causes variance at the stop position of the blocking plate 28 to disable a flow of the developer to be cut completely. On the other hand, the closing angle is set larger than the opening angle to eliminate the influence of variation in the stop position of the closing plate, thereby cutting napping stably.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62241643A JPS6482069A (en) | 1987-09-25 | 1987-09-25 | Developing device for copying machine |
US07/216,359 US4914481A (en) | 1987-07-09 | 1988-07-07 | Developing apparatus |
DE8888110958T DE3869496D1 (en) | 1987-07-09 | 1988-07-08 | DEVELOPMENT DEVICE. |
EP88110958A EP0298504B1 (en) | 1987-07-09 | 1988-07-08 | Developing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62241643A JPS6482069A (en) | 1987-09-25 | 1987-09-25 | Developing device for copying machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6482069A true JPS6482069A (en) | 1989-03-28 |
Family
ID=17077366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62241643A Pending JPS6482069A (en) | 1987-07-09 | 1987-09-25 | Developing device for copying machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6482069A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5987280A (en) * | 1994-03-18 | 1999-11-16 | Fujitsu Limited | Developing device for electrostatic latent image |
-
1987
- 1987-09-25 JP JP62241643A patent/JPS6482069A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5987280A (en) * | 1994-03-18 | 1999-11-16 | Fujitsu Limited | Developing device for electrostatic latent image |
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