JPS6382262U - - Google Patents

Info

Publication number
JPS6382262U
JPS6382262U JP17658386U JP17658386U JPS6382262U JP S6382262 U JPS6382262 U JP S6382262U JP 17658386 U JP17658386 U JP 17658386U JP 17658386 U JP17658386 U JP 17658386U JP S6382262 U JPS6382262 U JP S6382262U
Authority
JP
Japan
Prior art keywords
current value
current
toner
white plate
detecting means
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
JP17658386U
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 JP17658386U priority Critical patent/JPS6382262U/ja
Publication of JPS6382262U publication Critical patent/JPS6382262U/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図は本考案に係る一実施例の複写機の内部
概略図、第２図は要部説明図、第３図は同実施例
における動作手順を示すフローチヤートである。 １……複写機、２……プラテンガラス、３……
原稿、４……プラテンカバー、５……基準白色板
、６……露光ランプ、７……反射鏡、８……ミラ
ー、９……レンズ、１０……感光体、１１……帯
電器、１２……現像装置、１３……転写器、１４
……クリーニング器、１５……定着器、２０……
現像ロール、２１……トリミングバー、２２……
トナーボトル、２３……トナー供給用オーガ、２
４……ミキシングロール、２５……駆動用モータ
、２６……現像バイアス電源、２７……電流検出
回路、２８……電圧変換回路、２９……演算回路
、３０……トナー補給量制御回路。 FIG. 1 is an internal schematic diagram of a copying machine according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of main parts, and FIG. 3 is a flowchart showing the operating procedure of the embodiment. 1... Copy machine, 2... Platen glass, 3...
Original, 4...Platen cover, 5...Reference white plate, 6...Exposure lamp, 7...Reflector, 8...Mirror, 9...Lens, 10...Photoconductor, 11...Charger, 12 ...Developing device, 13...Transfer device, 14
... Cleaning device, 15 ... Fixing device, 20 ...
Developing roll, 21...Trimming bar, 22...
Toner bottle, 23...Toner supply auger, 2
4... Mixing roll, 25... Drive motor, 26... Development bias power supply, 27... Current detection circuit, 28... Voltage conversion circuit, 29... Arithmetic circuit, 30... Toner replenishment amount control circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 現像バイアス印加回路に設けた電流検出手段に
より検出した電流値に基づき、現像時現像ロール
より感光体に転移したトナー量を推定し、消費ト
ナー量に見合うトナーを現像装置に補給するトナ
ー補給手段を備える複写機において、画像領域外
の光学系走査の開始部分に設けられた基準白色板
と、同基準白色板に対応する前記電流検出手段の
電流値を基準電流値とし原稿画像部に対応する前
記電流検出手段の電流値から前記基準電流値を引
いた電流差に基づき前記トナー補給手段を駆動制
御する制御手段とを備えたことを特徴とする複写
機の自動画像濃度制御装置。 A toner replenishing means estimates the amount of toner transferred from the developing roll to the photoreceptor during development based on the current value detected by the current detecting means provided in the developing bias application circuit, and replenishes the developing device with toner corresponding to the amount of consumed toner. In the copying machine, a reference white plate provided at a start portion of optical system scanning outside the image area and a current value of the current detecting means corresponding to the reference white plate are used as a reference current value, and the current value of the current detecting means corresponding to the reference white plate is set as a reference current value. An automatic image density control device for a copying machine, comprising: control means for driving and controlling the toner replenishing means based on a current difference obtained by subtracting the reference current value from the current value of the current detection means.
JP17658386U 1986-11-19 1986-11-19 Pending JPS6382262U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17658386U JPS6382262U (en) 1986-11-19 1986-11-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17658386U JPS6382262U (en) 1986-11-19 1986-11-19

Publications (1)

Publication Number Publication Date
JPS6382262U true JPS6382262U (en) 1988-05-30

Family

ID=31116964

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17658386U Pending JPS6382262U (en) 1986-11-19 1986-11-19

Country Status (1)

Country Link
JP (1) JPS6382262U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5872175A (en) * 1981-10-26 1983-04-30 Minolta Camera Co Ltd Toner density controlling method for electrophotographic copying machine
JPS61159663A (en) * 1985-01-08 1986-07-19 Fuji Xerox Co Ltd Automatic image density control method of copying machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5872175A (en) * 1981-10-26 1983-04-30 Minolta Camera Co Ltd Toner density controlling method for electrophotographic copying machine
JPS61159663A (en) * 1985-01-08 1986-07-19 Fuji Xerox Co Ltd Automatic image density control method of copying machine

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