JPS6219669U - - Google Patents
Info
- Publication number
- JPS6219669U JPS6219669U JP10953885U JP10953885U JPS6219669U JP S6219669 U JPS6219669 U JP S6219669U JP 10953885 U JP10953885 U JP 10953885U JP 10953885 U JP10953885 U JP 10953885U JP S6219669 U JPS6219669 U JP S6219669U
- Authority
- JP
- Japan
- Prior art keywords
- current
- copying machine
- toner
- input
- control device
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Dry Development In Electrophotography (AREA)
- Control Of Amplification And Gain Control (AREA)
Description
図面は本考案の実施例を示すもので、第１図は
全体の構成図、第２図は現像装置及び制御系の説
明図、第３図は電流‐電圧変換回路の回路図であ
る。
４は現像装置、１１は現像バイアス印加回路、
１５は制御装置、１７はトナー供給モータ、２１
はオペアンプ、Ｒ７は可変抵抗。
The drawings show an embodiment of the present invention; FIG. 1 is an overall configuration diagram, FIG. 2 is an explanatory diagram of a developing device and control system, and FIG. 3 is a circuit diagram of a current-voltage conversion circuit. 4 is a developing device, 11 is a developing bias application circuit,
15 is a control device, 17 is a toner supply motor, 21
is an operational amplifier, and R7 is a variable resistor.
Claims (1)
印加回路１１に設けられた電流検出手段にて検出
し、この検出電流を電流‐電圧変換回路にて電圧
に変換及び増幅して制御装置１５へ入力し、この
入力値に応じてトナー供給モータ１７を回転制御
することにより、現像時に消費されたトナーに見
合つた量のトナーを現像装置４へ供給するように
した複写機において、上記電流‐電圧変換回路内
の電流入力回路２０に、オプアンプ２１と並列に
可変抵抗器Ｒ７を接続したことを特徴とする複写
機の自動画像濃度制御装置。 The amount of toner consumed during development is detected by a current detection means provided in the development bias application circuit 11, and this detected current is converted and amplified into a voltage by a current-voltage conversion circuit and input to the control device 15. In the copying machine, the toner supply motor 17 is rotationally controlled in accordance with this input value to supply the developing device 4 with an amount of toner commensurate with the toner consumed during development. 1. An automatic image density control device for a copying machine, characterized in that a variable resistor R7 is connected in parallel with an operational amplifier 21 to a current input circuit 20 in the copying machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10953885U JPS6219669U (en) | 1985-07-19 | 1985-07-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10953885U JPS6219669U (en) | 1985-07-19 | 1985-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6219669U true JPS6219669U (en) | 1987-02-05 |
Family
ID=30987719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10953885U Pending JPS6219669U (en) | 1985-07-19 | 1985-07-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6219669U (en) |
-
1985
- 1985-07-19 JP JP10953885U patent/JPS6219669U/ja active Pending
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