JPS6339248U - - Google Patents
Info
- Publication number
- JPS6339248U JPS6339248U JP13211286U JP13211286U JPS6339248U JP S6339248 U JPS6339248 U JP S6339248U JP 13211286 U JP13211286 U JP 13211286U JP 13211286 U JP13211286 U JP 13211286U JP S6339248 U JPS6339248 U JP S6339248U
- Authority
- JP
- Japan
- Prior art keywords
- developer
- carrier
- antenna
- latent image
- forming apparatus
- 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
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Dry Development In Electrophotography (AREA)
Description
図面第１図は本考案よりなる画像形成装置の現
像剤状態検知装置の構成概要一例を示す図、第２
図は現像器内の実際の現像剤状態とアンテナ出力
の関係を説明するための図、第３図は従来のアン
テナ式現像剤状態検知装置を有する現像器内の構
成を模式的に示した図、第４図は従来のアンテナ
式現像剤状態検知装置の構成例を示した図である
。
１：高圧ユニツト、２：外部電源、３：現像バ
イアス電源回路、４：現像スリーブ、５：アンテ
ナ、６：現像剤状態判定回路、７：電圧計、１０
：調整用現像器、４１：システム制御部、４２：
表示部。
Figure 1 is a diagram showing an example of a general configuration of a developer state detection device for an image forming apparatus according to the present invention;
The figure is a diagram for explaining the relationship between the actual developer state in the developing device and the antenna output, and FIG. 3 is a diagram schematically showing the configuration inside the developing device having a conventional antenna-type developer state detection device. , FIG. 4 is a diagram showing an example of the configuration of a conventional antenna type developer state detection device. 1: High voltage unit, 2: External power supply, 3: Developing bias power supply circuit, 4: Developing sleeve, 5: Antenna, 6: Developer condition determination circuit, 7: Voltmeter, 10
: Adjustment developer, 41: System control unit, 42:
Display section.
Claims (1)
た現像器を設け、この現像剤担持体にバイアス電
圧を印加しながら前記静電潜像担持体上の潜像を
現像する画像形成装置において、前記現像器内に
、現像剤担持体との間の現像剤を介した電気容量
変化を検知するアンテナを配置すると共に、該ア
ンテナに接続されてそのアンテナ出力信号に依存
して現像剤状態を判定する現像剤状態判定回路と
、前記現像剤担持体にバイアス電圧を印加するた
めの現像バイアス電源回路とを、単一のユニツト
として構成し、更に該ユニツトにはアンテナ出力
補正手段を設けたことを特徴とする画像形成装置
。 An image forming apparatus that includes a developing device in which a developer carrier faces an electrostatic latent image carrier, and develops the latent image on the electrostatic latent image carrier while applying a bias voltage to the developer carrier. An antenna for detecting a change in capacitance between the developer carrier and the developer via the developer is disposed in the developing device, and is connected to the antenna to detect the state of the developer depending on the antenna output signal. A developer state determination circuit for determining the developer condition and a development bias power supply circuit for applying a bias voltage to the developer carrier are configured as a single unit, and the unit is further provided with an antenna output correction means. An image forming apparatus characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13211286U JPS6339248U (en) | 1986-08-29 | 1986-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13211286U JPS6339248U (en) | 1986-08-29 | 1986-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6339248U true JPS6339248U (en) | 1988-03-14 |
Family
ID=31031195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13211286U Pending JPS6339248U (en) | 1986-08-29 | 1986-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6339248U (en) |
-
1986
- 1986-08-29 JP JP13211286U patent/JPS6339248U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6339248U (en) | ||
| JPS55111970A (en) | Developing method | |
| JPS6150966U (en) | ||
| JPH0311245U (en) | ||
| JPS57135965A (en) | Electrophotographic transfer device | |
| JPS5828862U (en) | image forming device | |
| JPS62129557U (en) | ||
| JPS62142067U (en) | ||
| JPS61179571U (en) | ||
| JPS6170858U (en) | ||
| JPS6333167U (en) | ||
| JPS6219669U (en) | ||
| JPS62106264U (en) | ||
| JPS62108857U (en) | ||
| JPS5828861U (en) | Toner remaining amount detection mechanism | |
| JPS6041962U (en) | Copy machine density control device | |
| JPS61128661U (en) | ||
| JPH0243579A (en) | Printing device | |
| JPS5920245U (en) | electrophotographic copying device | |
| JPS54130134A (en) | Developing bias control unit | |
| JPH0312264U (en) | ||
| JPS6156663U (en) | ||
| JPS5867345U (en) | Copy machine exposure control device | |
| JPS61171059U (en) | ||
| JPS62193250U (en) |