FR2422985A1 - Poudre magnetique a developper pour dispositifs copieurs - Google Patents

Poudre magnetique a developper pour dispositifs copieurs

Info

Publication number
FR2422985A1
FR2422985A1 FR7909069A FR7909069A FR2422985A1 FR 2422985 A1 FR2422985 A1 FR 2422985A1 FR 7909069 A FR7909069 A FR 7909069A FR 7909069 A FR7909069 A FR 7909069A FR 2422985 A1 FR2422985 A1 FR 2422985A1
Authority
FR
France
Prior art keywords
developed
weight
magnetic powder
copying devices
powder
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
FR7909069A
Other languages
English (en)
Other versions
FR2422985B1 (fr
Inventor
Masumi Asanae
Koji Noguchi
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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 Metals Ltd filed Critical Hitachi Metals Ltd
Publication of FR2422985A1 publication Critical patent/FR2422985A1/fr
Application granted granted Critical
Publication of FR2422985B1 publication Critical patent/FR2422985B1/fr
Granted 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
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/083—Magnetic toner particles
    • G03G9/0839—Treatment of the magnetic components; Combination of the magnetic components with non-magnetic materials
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/0825—Developers with toner particles characterised by their structure; characterised by non-homogenuous distribution of components

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

Poudre - développer sèche. Elle comprend un coeur auquel sont fixées des particules conductrices de l'électricité, le coeur comprenant 50 à 75 % en poids de particules perméables magnétiquement et 0 à 5 % en poids de particules conductrices de l'électricité qui sont liées par 25 à 50 % en poids de résine thermoplastique, la poudre ayant une résistivité électrique de 10**10 à 10**16 OMEGA -cm sous un champ électrique continu d'environ 6 000V/cm et une résistivité de 10**6 à 10** 11 OMEGA -cm sous un champ électrique continu d'environ 12 000 V/cm. Application aux vireurs pour copieurs à papier ordinaire.
FR7909069A 1978-04-10 1979-04-10 Poudre magnetique a developper pour dispositifs copieurs Granted FR2422985A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4188878A JPS54139545A (en) 1978-04-10 1978-04-10 Magnetic toner

Publications (2)

Publication Number Publication Date
FR2422985A1 true FR2422985A1 (fr) 1979-11-09
FR2422985B1 FR2422985B1 (fr) 1983-11-04

Family

ID=12620809

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7909069A Granted FR2422985A1 (fr) 1978-04-10 1979-04-10 Poudre magnetique a developper pour dispositifs copieurs

Country Status (5)

Country Link
JP (1) JPS54139545A (fr)
DE (1) DE2914591A1 (fr)
DK (1) DK142679A (fr)
FR (1) FR2422985A1 (fr)
GB (1) GB2021794B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492122A1 (fr) * 1980-10-13 1982-04-16 Ricoh Kk Procede electrophotographique utilisant un developpeur a deux composants
EP0075346A1 (fr) * 1981-09-18 1983-03-30 Océ-Nederland B.V. Poudre développatrice colorée, procédé pour sa préparation, et procédé de développement

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2791013B2 (ja) * 1986-10-17 1998-08-27 キヤノン株式会社 静電荷像現像用摩擦帯電性トナーの製造方法及び製造装置
JPS63257763A (ja) * 1987-04-15 1988-10-25 Hitachi Metals Ltd 画像記録方法
US5275299A (en) * 1988-04-15 1994-01-04 C. A. Greiner & Sohne Gesellschaft Mbh Closure device for an in particular evacuable cylindrical housing
GB9614494D0 (en) * 1996-07-10 1996-09-04 Cookson Matthey Ceramics Plc Improvements in printing
JP5442046B2 (ja) * 2012-02-01 2014-03-12 キヤノン株式会社 磁性トナー

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890968A (en) * 1955-06-02 1959-06-16 Rca Corp Electrostatic printing process and developer composition therefor
FR2013449A1 (fr) * 1968-07-22 1970-04-03 Minnesota Mining & Mfg
FR95434E (fr) * 1964-10-14 1970-11-06 Minnesota Mining & Mfg Procédé électrographique de reproduction.
US3627682A (en) * 1968-10-16 1971-12-14 Du Pont Encapsulated particulate binary magnetic toners for developing images
FR2330039A1 (fr) * 1975-10-27 1977-05-27 Mita Industrial Co Ltd Developpateur pour photographie electrostatique et procede pour sa preparation
FR2337360A1 (fr) * 1975-12-29 1977-07-29 Elfotec Ag Toner magnetique a un composant et son procede de fabrication

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5045639A (fr) * 1973-08-27 1975-04-23
JPS51126836A (en) * 1975-04-26 1976-11-05 Shigekazu Enoki Magnetic toner
JPS51133028A (en) * 1975-05-15 1976-11-18 K I P:Kk Electrophotographic development method
JPS51138442A (en) * 1975-05-26 1976-11-30 Enoki Shigekazu Magnetic toner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890968A (en) * 1955-06-02 1959-06-16 Rca Corp Electrostatic printing process and developer composition therefor
FR95434E (fr) * 1964-10-14 1970-11-06 Minnesota Mining & Mfg Procédé électrographique de reproduction.
FR2013449A1 (fr) * 1968-07-22 1970-04-03 Minnesota Mining & Mfg
US3627682A (en) * 1968-10-16 1971-12-14 Du Pont Encapsulated particulate binary magnetic toners for developing images
FR2330039A1 (fr) * 1975-10-27 1977-05-27 Mita Industrial Co Ltd Developpateur pour photographie electrostatique et procede pour sa preparation
FR2337360A1 (fr) * 1975-12-29 1977-07-29 Elfotec Ag Toner magnetique a un composant et son procede de fabrication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492122A1 (fr) * 1980-10-13 1982-04-16 Ricoh Kk Procede electrophotographique utilisant un developpeur a deux composants
EP0075346A1 (fr) * 1981-09-18 1983-03-30 Océ-Nederland B.V. Poudre développatrice colorée, procédé pour sa préparation, et procédé de développement

Also Published As

Publication number Publication date
GB2021794B (en) 1983-01-12
DE2914591A1 (de) 1979-10-18
JPS54139545A (en) 1979-10-30
FR2422985B1 (fr) 1983-11-04
DK142679A (da) 1979-10-11
GB2021794A (en) 1979-12-05

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Legal Events

Date Code Title Description
ST Notification of lapse