JPH01128355U - - Google Patents
Info
- Publication number
- JPH01128355U JPH01128355U JP2357088U JP2357088U JPH01128355U JP H01128355 U JPH01128355 U JP H01128355U JP 2357088 U JP2357088 U JP 2357088U JP 2357088 U JP2357088 U JP 2357088U JP H01128355 U JPH01128355 U JP H01128355U
- Authority
- JP
- Japan
- Prior art keywords
- toner
- concentration sensor
- replenishment control
- toner replenishment
- output signal
- 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 description 9
- 238000012544 monitoring process Methods 0.000 claims 3
- 230000035699 permeability Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Description
第１図は本実施例の現像剤寿命検知装置を含む
プリンタの構成図、第２図〜第７図は本実施例の
現像剤寿命検知装置の動作説明図、第８図は本実
施例の現像剤寿命検知装置の動作を説明するフロ
ーチヤート、第９図は本実施例の現像剤寿命検知
装置における正常時のトナー検知測定図、第１０
図は本実施例の現像剤寿命検知装置における現像
剤寿命時のトナー検知測定図、第１１図は現像剤
寿命検知装置の他の実施例の動作を説明するフロ
ーチヤートである。
６…トナーホツパ、７…現像槽、８…補給口、
９…トナー補給ロール、１０…撹拌羽根、１１…
マグネツトロール、１２…現像スリーブ、１５…
コンパレータ、１６…電源、１７…ＣＰＵ。
FIG. 1 is a configuration diagram of a printer including the developer life detection device of this embodiment, FIGS. 2 to 7 are operation explanatory diagrams of the developer life detection device of this embodiment, and FIG. A flowchart explaining the operation of the developer life detection device, FIG. 9 is a diagram showing normal toner detection and measurement in the developer life detection device of this embodiment, and FIG. 10
The figure is a diagram of toner detection measurement during developer life in the developer life detection device of this embodiment, and FIG. 11 is a flowchart illustrating the operation of another embodiment of the developer life detection device. 6... Toner hopper, 7... Developer tank, 8... Supply port,
9... Toner supply roll, 10... Stirring blade, 11...
Magnet roll, 12...Developing sleeve, 15...
Comparator, 16...power supply, 17...CPU.
Claims (1)
率に応じた出力信号を出力するトナー濃度センサ
と、該トナー濃度センサの出力信号に基づきトナ
ー補給制御を行うトナー補給制御手段と、前記出
力信号に基づくトナー補給動作直後の前記トナー
濃度センサ出力の変化を監視する監視手段とを備
え、該監視手段により前記トナー濃度センサ出力
の変化量に基づき前記現像剤の寿命を検知するこ
とを特徴とする現像剤寿命検知装置。 a toner concentration sensor that outputs an output signal corresponding to the magnetic permeability of a two-component developer consisting of toner and carrier; a toner replenishment control means that performs toner replenishment control based on the output signal of the toner concentration sensor; and a toner replenishment control means that performs toner replenishment control based on the output signal. and monitoring means for monitoring a change in the output of the toner concentration sensor immediately after a toner replenishment operation, and the monitoring means detects the lifespan of the developer based on the amount of change in the output of the toner concentration sensor. Lifespan detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2357088U JPH071645Y2 (en) | 1988-02-24 | 1988-02-24 | Developer life detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2357088U JPH071645Y2 (en) | 1988-02-24 | 1988-02-24 | Developer life detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01128355U true JPH01128355U (en) | 1989-09-01 |
| JPH071645Y2 JPH071645Y2 (en) | 1995-01-18 |
Family
ID=31242672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2357088U Expired - Lifetime JPH071645Y2 (en) | 1988-02-24 | 1988-02-24 | Developer life detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH071645Y2 (en) |
-
1988
- 1988-02-24 JP JP2357088U patent/JPH071645Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH071645Y2 (en) | 1995-01-18 |
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