JPS569769A - Toner concentration detector of developer - Google Patents

Toner concentration detector of developer

Info

Publication number
JPS569769A
JPS569769A JP8474979A JP8474979A JPS569769A JP S569769 A JPS569769 A JP S569769A JP 8474979 A JP8474979 A JP 8474979A JP 8474979 A JP8474979 A JP 8474979A JP S569769 A JPS569769 A JP S569769A
Authority
JP
Japan
Prior art keywords
developer
detecting case
detecting
opening
case
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
Application number
JP8474979A
Other languages
Japanese (ja)
Other versions
JPS6337381B2 (en
Inventor
Isamu Komatsu
Masayasu Anzai
Kiyoshi Niinuma
Isao Fujimoto
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.)
Koki Holdings Co Ltd
Hitachi Ltd
NTT Inc
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Hitachi Koki Co Ltd
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 Hitachi Ltd, Nippon Telegraph and Telephone Corp, Hitachi Koki Co Ltd filed Critical Hitachi Ltd
Priority to JP8474979A priority Critical patent/JPS569769A/en
Publication of JPS569769A publication Critical patent/JPS569769A/en
Publication of JPS6337381B2 publication Critical patent/JPS6337381B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To prevent the developer from stagnating in a detecting case to which an inductance change detecting coil is mounted and accurately detect the change in toner concentration by letting the opening widths that said detecting case forms with a magnet roll for discharging satisfy the specific conditions. CONSTITUTION:The developer 1 in a detecting case 7 is led to outside the detecting case 7 by a rotating magnet roll 8 for discharging and the rate of its outflow is limited by the pass width (c) of the portion (gamma) by the outflow rate limiting plate 9 mounted roughly at the center in the bottom end opening of the detecting case 7 and the opening width (a) of the portion (beta) at the bottom end of the detecting case 7. On the other hand, in the bottom end portion (alpha) of the detecting case 7, the developer 1 equal to the opening width (b) attracted on the roll 8 advances into the detecting case 7. The opening width (b) is made smaller than (a) and more than zero and the difference (a-b) of the two opening widths is set at the optimum rate of discharge of the developer at which a coil 6 actuates properly. The limiting pass width (c) by the limiting plate 9 is so constituted as to assume a value of a-(a/2- b/2) or b+(a/2-b/2).
JP8474979A 1979-07-03 1979-07-03 Toner concentration detector of developer Granted JPS569769A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8474979A JPS569769A (en) 1979-07-03 1979-07-03 Toner concentration detector of developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8474979A JPS569769A (en) 1979-07-03 1979-07-03 Toner concentration detector of developer

Publications (2)

Publication Number Publication Date
JPS569769A true JPS569769A (en) 1981-01-31
JPS6337381B2 JPS6337381B2 (en) 1988-07-25

Family

ID=13839335

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8474979A Granted JPS569769A (en) 1979-07-03 1979-07-03 Toner concentration detector of developer

Country Status (1)

Country Link
JP (1) JPS569769A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5434838A (en) * 1977-08-24 1979-03-14 Hitachi Ltd Toner concentration detector
JPS5439137A (en) * 1977-09-02 1979-03-26 Hitachi Ltd Toner concentration detetor
JPS5466144A (en) * 1977-11-07 1979-05-28 Hitachi Ltd Detector of developer toner concentrations

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5434838A (en) * 1977-08-24 1979-03-14 Hitachi Ltd Toner concentration detector
JPS5439137A (en) * 1977-09-02 1979-03-26 Hitachi Ltd Toner concentration detetor
JPS5466144A (en) * 1977-11-07 1979-05-28 Hitachi Ltd Detector of developer toner concentrations

Also Published As

Publication number Publication date
JPS6337381B2 (en) 1988-07-25

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