JPS6450080A - Toner density controller - Google Patents

Toner density controller

Info

Publication number
JPS6450080A
JPS6450080A JP20784087A JP20784087A JPS6450080A JP S6450080 A JPS6450080 A JP S6450080A JP 20784087 A JP20784087 A JP 20784087A JP 20784087 A JP20784087 A JP 20784087A JP S6450080 A JPS6450080 A JP S6450080A
Authority
JP
Japan
Prior art keywords
toner
toner sensor
operation point
developer
toner density
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
JP20784087A
Other languages
Japanese (ja)
Inventor
Shiro Nakagawa
Taisuke Domon
Takehiro Imai
Keiko Otomi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
Original Assignee
TDK Corp
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 by TDK Corp filed Critical TDK Corp
Priority to JP20784087A priority Critical patent/JPS6450080A/en
Publication of JPS6450080A publication Critical patent/JPS6450080A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To control the toner concentration of a developer stably with high accuracy by controlling the toner density based on the operation point of a toner sensor. CONSTITUTION:The toner sensor 7 is fitted on the side wall, etc., of a developer container 2 so that a detection part contacts the developer 1 and the operation point of this toner sensor 7 is varied and set with a current flowing through a control line (a) or an applied voltage. A microcomputer 8 inputs the output of the toner sensor 7 through an output line (a) and sends a control signal to the toner sensor 7 through the control line (b) so that the operation point of the toner sensor 7 has a proper value, thereby controlling the current or voltage. The operation point of the toner sensor 7 is therefore set to the proper value automatically. Consequently, the toner density is controlled stably with high accuracy.
JP20784087A 1987-08-21 1987-08-21 Toner density controller Pending JPS6450080A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20784087A JPS6450080A (en) 1987-08-21 1987-08-21 Toner density controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20784087A JPS6450080A (en) 1987-08-21 1987-08-21 Toner density controller

Publications (1)

Publication Number Publication Date
JPS6450080A true JPS6450080A (en) 1989-02-27

Family

ID=16546393

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20784087A Pending JPS6450080A (en) 1987-08-21 1987-08-21 Toner density controller

Country Status (1)

Country Link
JP (1) JPS6450080A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038175A (en) * 1989-05-30 1991-08-06 Ricoh Company Image density control method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60128470A (en) * 1983-12-15 1985-07-09 Toshiba Corp Developing device
JPS60178471A (en) * 1984-02-27 1985-09-12 Oki Electric Ind Co Ltd Dry developing device
JPS61149858A (en) * 1984-12-24 1986-07-08 Tdk Corp Magnetic detecting device
JPS62164067A (en) * 1986-01-14 1987-07-20 Hitachi Metals Ltd Control method for developer toner concentration

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60128470A (en) * 1983-12-15 1985-07-09 Toshiba Corp Developing device
JPS60178471A (en) * 1984-02-27 1985-09-12 Oki Electric Ind Co Ltd Dry developing device
JPS61149858A (en) * 1984-12-24 1986-07-08 Tdk Corp Magnetic detecting device
JPS62164067A (en) * 1986-01-14 1987-07-20 Hitachi Metals Ltd Control method for developer toner concentration

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038175A (en) * 1989-05-30 1991-08-06 Ricoh Company Image density control method

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