JPS6373769U - - Google Patents

Info

Publication number
JPS6373769U
JPS6373769U JP16508686U JP16508686U JPS6373769U JP S6373769 U JPS6373769 U JP S6373769U JP 16508686 U JP16508686 U JP 16508686U JP 16508686 U JP16508686 U JP 16508686U JP S6373769 U JPS6373769 U JP S6373769U
Authority
JP
Japan
Prior art keywords
sensor
density
contamination
toner density
developing
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
Application number
JP16508686U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP16508686U priority Critical patent/JPS6373769U/ja
Priority to US07/114,106 priority patent/US4801980A/en
Publication of JPS6373769U publication Critical patent/JPS6373769U/ja
Pending legal-status Critical Current

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  • Dry Development In Electrophotography (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例のセンサ汚れ補償の
回路図、第２図はセンサ汚れ補償用データ取り込
みとトナー濃度データ取り込みのタイミングの説
明図、第３図は従来の一般的な電子写真式複写装
置の原理説明図、第４図は従来のトナー濃度制御
の回路図である。 １７…センサ。 Fig. 1 is a circuit diagram of sensor dirt compensation according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of the timing of sensor dirt compensation data capture and toner density data capture, and Fig. 3 is a conventional general electronic photograph. FIG. 4, which is a diagram explaining the principle of a type copying apparatus, is a circuit diagram of a conventional toner density control. 17...Sensor.

Claims (1)

【実用新案登録請求の範囲】 基準濃度板の画像を感光体ドラム面に現像した
パツチ画像の濃度をセンサで検知して、トナー濃
度を制御するように構成したトナー濃度制御装置
において、 上記センサの汚れに応じて該センサの発光素子
の電源電圧を制御する手段、及び該電圧が限界に
達すると外部に信号を出力する手段を有すること
を特徴とするセンサの汚れ補償装置。[Scope of Claim for Utility Model Registration] A toner density control device configured to control toner density by detecting the density of a patch image obtained by developing an image on a reference density plate onto a photoreceptor drum surface with a sensor, A contamination compensating device for a sensor, comprising means for controlling a power supply voltage of a light emitting element of the sensor according to contamination, and means for outputting a signal to the outside when the voltage reaches a limit.
JP16508686U 1986-10-29 1986-10-29 Pending JPS6373769U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP16508686U JPS6373769U (en) 1986-10-29 1986-10-29
US07/114,106 US4801980A (en) 1986-10-29 1987-10-28 Toner density control apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16508686U JPS6373769U (en) 1986-10-29 1986-10-29

Publications (1)

Publication Number Publication Date
JPS6373769U true JPS6373769U (en) 1988-05-17

Family

ID=31094801

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16508686U Pending JPS6373769U (en) 1986-10-29 1986-10-29

Country Status (1)

Country Link
JP (1) JPS6373769U (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5565976A (en) * 1978-11-11 1980-05-17 Ricoh Co Ltd Toner concentration control unit of recorder
JPS56164355A (en) * 1980-05-22 1981-12-17 Fuji Xerox Co Ltd Image density detector of electrophotographic copying machine
JPS58126557A (en) * 1982-01-22 1983-07-28 Fuji Xerox Co Ltd Adjusting device of toner density
JPS58182650A (en) * 1982-04-20 1983-10-25 Ricoh Co Ltd Method for adjusting control device for image density of electrophotographic copying machine
JPS61148463A (en) * 1984-12-24 1986-07-07 Fuji Xerox Co Ltd Automatic image density controller of dry electrophotographic copying machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5565976A (en) * 1978-11-11 1980-05-17 Ricoh Co Ltd Toner concentration control unit of recorder
JPS56164355A (en) * 1980-05-22 1981-12-17 Fuji Xerox Co Ltd Image density detector of electrophotographic copying machine
JPS58126557A (en) * 1982-01-22 1983-07-28 Fuji Xerox Co Ltd Adjusting device of toner density
JPS58182650A (en) * 1982-04-20 1983-10-25 Ricoh Co Ltd Method for adjusting control device for image density of electrophotographic copying machine
JPS61148463A (en) * 1984-12-24 1986-07-07 Fuji Xerox Co Ltd Automatic image density controller of dry electrophotographic copying machine

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