JPS559581A - Developing ability detecting method and developing device provided with said device - Google Patents
Developing ability detecting method and developing device provided with said deviceInfo
- Publication number
- JPS559581A JPS559581A JP8324678A JP8324678A JPS559581A JP S559581 A JPS559581 A JP S559581A JP 8324678 A JP8324678 A JP 8324678A JP 8324678 A JP8324678 A JP 8324678A JP S559581 A JPS559581 A JP S559581A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- toner
- path
- developing
- electrodes
- 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
- Dry Development In Electrophotography (AREA)
Abstract
PURPOSE:To detect developing concentrations with high accuracy by detecting the concentration of the developer depositing on the developer path and letting the developer flow down in a filled state after the detection thereby cleaning the developer path. CONSTITUTION:When a cover 25 is closed while applying voltage to the electrodes 11, 12, which are provided separately from the circulating path of two-component type developer and are provided with the light source 23 and photoelectric element 24 sealed with dustproof covers 21, 22 on the outside surface and allowing the developer to flow down in the developer path formed by said electrodes 11, 12, then the toner diposits on the electrode 12, etc. Since there is no phenomenon that the deposited quantity of this toner flows down, the transmitted light is well detected by the light source 23 and element 24 without being interfered. Next, when the develo- per is flowed down in a filled state in the developer path by opening the cover 25, the deposited toner is cleaned. This constitution causes the developer concentration to be detected with high accuracy and if the replenishment of the toner to the developer is controlled according to the comparison of the detecting signal and reference signal, good copying may be accomplished.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8324678A JPS559581A (en) | 1978-07-08 | 1978-07-08 | Developing ability detecting method and developing device provided with said device |
DE2927477A DE2927477C2 (en) | 1978-07-08 | 1979-07-06 | Apparatus and method for measuring the developability of a powdered developer for electrostatography |
US06/057,882 US4266141A (en) | 1978-07-08 | 1979-07-16 | Toner developing ability measuring system for electrostatography |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8324678A JPS559581A (en) | 1978-07-08 | 1978-07-08 | Developing ability detecting method and developing device provided with said device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS559581A true JPS559581A (en) | 1980-01-23 |
JPS6244270B2 JPS6244270B2 (en) | 1987-09-18 |
Family
ID=13796963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8324678A Granted JPS559581A (en) | 1978-07-08 | 1978-07-08 | Developing ability detecting method and developing device provided with said device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS559581A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5016539A (en) * | 1973-06-11 | 1975-02-21 | ||
JPS50149077U (en) * | 1974-05-24 | 1975-12-11 |
-
1978
- 1978-07-08 JP JP8324678A patent/JPS559581A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5016539A (en) * | 1973-06-11 | 1975-02-21 | ||
JPS50149077U (en) * | 1974-05-24 | 1975-12-11 |
Also Published As
Publication number | Publication date |
---|---|
JPS6244270B2 (en) | 1987-09-18 |
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