JPS57658A - Measuring device for quantity of charge of toner - Google Patents

Measuring device for quantity of charge of toner

Info

Publication number
JPS57658A
JPS57658A JP7467980A JP7467980A JPS57658A JP S57658 A JPS57658 A JP S57658A JP 7467980 A JP7467980 A JP 7467980A JP 7467980 A JP7467980 A JP 7467980A JP S57658 A JPS57658 A JP S57658A
Authority
JP
Japan
Prior art keywords
magnet
developer
toner
magnetic
sample
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
JP7467980A
Other languages
Japanese (ja)
Other versions
JPS5952424B2 (en
Inventor
Junzo Nakajima
Junichi Tashiro
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55074679A priority Critical patent/JPS5952424B2/en
Publication of JPS57658A publication Critical patent/JPS57658A/en
Publication of JPS5952424B2 publication Critical patent/JPS5952424B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To measure the quantity of charges of a toner by a simple method with high accuracy by using a magnet having a prescribed shape so as to retain a developer in a magnetic brush developing system. CONSTITUTION:A magnet 8 retaining a developer is formed into a 2-step shape having a central protruded part, and a sample developer 9 is stuck to the inner pro- truded magnet face. In this magnet 8, magnetic poles of the same polarity are adjacent to each other, and lines 10' of magnetic force at each upper-step edge rise vertically by mutual repulsion. Accordingly, when a high-pressure gas is sprayed on such a magnetic brush, no developer 9 overflows the sample face of the magnet owing to waving.
JP55074679A 1980-06-03 1980-06-03 Toner charge amount measuring device Expired JPS5952424B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55074679A JPS5952424B2 (en) 1980-06-03 1980-06-03 Toner charge amount measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55074679A JPS5952424B2 (en) 1980-06-03 1980-06-03 Toner charge amount measuring device

Publications (2)

Publication Number Publication Date
JPS57658A true JPS57658A (en) 1982-01-05
JPS5952424B2 JPS5952424B2 (en) 1984-12-19

Family

ID=13554146

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55074679A Expired JPS5952424B2 (en) 1980-06-03 1980-06-03 Toner charge amount measuring device

Country Status (1)

Country Link
JP (1) JPS5952424B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60142718A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Electronic ac voltage variable device
JPS60142719A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Electronic ac voltage variable device
JPS60142720A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Electronic ac voltage variable device
JPS60142717A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Electronic ac voltage variable device
JPS60142721A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Electronic ac voltage variable device
JPS60129898U (en) * 1984-02-06 1985-08-31 日本コロムビア株式会社 Motor drive circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60142718A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Electronic ac voltage variable device
JPS60142719A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Electronic ac voltage variable device
JPS60142720A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Electronic ac voltage variable device
JPS60142717A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Electronic ac voltage variable device
JPS60142721A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Electronic ac voltage variable device
JPS60129898U (en) * 1984-02-06 1985-08-31 日本コロムビア株式会社 Motor drive circuit

Also Published As

Publication number Publication date
JPS5952424B2 (en) 1984-12-19

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