JPS61179571U - - Google Patents
Info
- Publication number
- JPS61179571U JPS61179571U JP6107985U JP6107985U JPS61179571U JP S61179571 U JPS61179571 U JP S61179571U JP 6107985 U JP6107985 U JP 6107985U JP 6107985 U JP6107985 U JP 6107985U JP S61179571 U JPS61179571 U JP S61179571U
- Authority
- JP
- Japan
- Prior art keywords
- current
- toner
- toner supply
- amount
- consumed during
- 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
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Dry Development In Electrophotography (AREA)
Description
図面はこの考案の一実施例を示し、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図はこの考案装置のブロツク図である。
４は現像装置、１１は現像バイアス印加回路、
１５は自動濃度制御装置、１９はトナー供給量制
御回路、２１はトナー供給モータ。
The drawings show one embodiment of this invention; FIG. 1 is an overall configuration diagram, FIG. 2 is an explanatory diagram of the developing device and control system, and FIG. 3 is a block diagram of the device. 4 is a developing device, 11 is a developing bias application circuit,
15 is an automatic density control device, 19 is a toner supply amount control circuit, and 21 is a toner supply motor.
Claims (1)
加回路１１に設けられた電流検出手段により検出
して、この電流値に応じてトナー供給モータ２１
を回転制御することにより、現像時消費されたト
ナーに見合つた量のトナーを現像装置４へ補給す
るものにおいて、上記電流検出手段で検出された
微弱電流を増幅する電流―電圧増幅回路の基板上
などでリーク電流が発生した場合、自動濃度制御
装置１５の機能を停止して、トナー供給量制御回
路１９に予め設定されたトナー供給率に応じた制
御信号をトナー供給モータ２１へ出力するように
してな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 the current detection means provided in the development bias application circuit 11, and the toner supply motor 21 is controlled according to this current value.
In this device, the toner is supplied to the developing device 4 in an amount commensurate with the toner consumed during development by controlling the rotation of the current-voltage amplifying circuit that amplifies the weak current detected by the current detecting means. If a leakage current occurs due to, for example, the function of the automatic density control device 15 is stopped, and a control signal corresponding to the toner supply rate set in advance in the toner supply amount control circuit 19 is output to the toner supply motor 21. Automatic image density control device for copying machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985061079U JPH063395Y2 (en) | 1985-04-25 | 1985-04-25 | Automatic image density controller for copiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985061079U JPH063395Y2 (en) | 1985-04-25 | 1985-04-25 | Automatic image density controller for copiers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61179571U true JPS61179571U (en) | 1986-11-08 |
| JPH063395Y2 JPH063395Y2 (en) | 1994-01-26 |
Family
ID=30589023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985061079U Expired - Lifetime JPH063395Y2 (en) | 1985-04-25 | 1985-04-25 | Automatic image density controller for copiers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063395Y2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5223341U (en) * | 1975-08-08 | 1977-02-18 | ||
| JPS56109373A (en) * | 1980-02-05 | 1981-08-29 | Ricoh Co Ltd | Control system for supply of toner of copying machine |
| JPS5981666A (en) * | 1982-11-01 | 1984-05-11 | Ricoh Co Ltd | Toner supplementing method |
| JPS6010275A (en) * | 1983-06-16 | 1985-01-19 | ゼロツクス・コ−ポレ−シヨン | Control system for adjusting feed of mark particle for electrophotographic printing machine |
-
1985
- 1985-04-25 JP JP1985061079U patent/JPH063395Y2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5223341U (en) * | 1975-08-08 | 1977-02-18 | ||
| JPS56109373A (en) * | 1980-02-05 | 1981-08-29 | Ricoh Co Ltd | Control system for supply of toner of copying machine |
| JPS5981666A (en) * | 1982-11-01 | 1984-05-11 | Ricoh Co Ltd | Toner supplementing method |
| JPS6010275A (en) * | 1983-06-16 | 1985-01-19 | ゼロツクス・コ−ポレ−シヨン | Control system for adjusting feed of mark particle for electrophotographic printing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH063395Y2 (en) | 1994-01-26 |
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