EP0357042A3 - Composition and method for developing electrostatic latent images - Google Patents

Composition and method for developing electrostatic latent images Download PDF

Info

Publication number
EP0357042A3
EP0357042A3 EP19890116016 EP89116016A EP0357042A3 EP 0357042 A3 EP0357042 A3 EP 0357042A3 EP 19890116016 EP19890116016 EP 19890116016 EP 89116016 A EP89116016 A EP 89116016A EP 0357042 A3 EP0357042 A3 EP 0357042A3
Authority
EP
European Patent Office
Prior art keywords
composition
electrostatic latent
latent images
developing electrostatic
magnetic toner
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
EP19890116016
Other languages
German (de)
French (fr)
Other versions
EP0357042A2 (en
EP0357042B1 (en
Inventor
Kazuo C/O Tdk Corporation Aoki
Akira C/O Tdk Corporation Kakinuma
Megumi C/O Tdk Corporation Saito
Motohiko C/O Tdk Corporation Makino
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
Priority claimed from JP63213812A external-priority patent/JP2787687B2/en
Priority claimed from JP1152978A external-priority patent/JP2807743B2/en
Application filed by TDK Corp filed Critical TDK Corp
Publication of EP0357042A2 publication Critical patent/EP0357042A2/en
Publication of EP0357042A3 publication Critical patent/EP0357042A3/en
Application granted granted Critical
Publication of EP0357042B1 publication Critical patent/EP0357042B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • G03G9/10—Developers with toner particles characterised by carrier particles
    • 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
    • G03G9/0819—Developers with toner particles characterised by the dimensions of the particles
    • 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
    • G03G9/0831—Chemical composition of the magnetic components

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

A composition for developing electrostatic latent images in electrographic printing or copying machinery is provided in which 10% to less than 40% by weight of a carrier having a mean particle diameter of from 10 to 35 mu m is blended with a magnetic toner comprising magnetic powder and a resin. Conventional charge control agents, especially metal complexes of azo dyes and Nigrosine dyes should be excluded from the magnetic toner.
EP89116016A 1988-08-30 1989-08-30 Composition and method for developing electrostatic latent images Expired - Lifetime EP0357042B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP213812/88 1988-08-30
JP63213812A JP2787687B2 (en) 1988-08-30 1988-08-30 Electrostatic latent image developer and developing method
JP152978/89 1989-06-15
JP1152978A JP2807743B2 (en) 1989-06-15 1989-06-15 Electrostatic latent image developer and developing method

Publications (3)

Publication Number Publication Date
EP0357042A2 EP0357042A2 (en) 1990-03-07
EP0357042A3 true EP0357042A3 (en) 1991-11-06
EP0357042B1 EP0357042B1 (en) 1998-03-25

Family

ID=26481732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116016A Expired - Lifetime EP0357042B1 (en) 1988-08-30 1989-08-30 Composition and method for developing electrostatic latent images

Country Status (6)

Country Link
EP (1) EP0357042B1 (en)
AT (1) ATE164459T1 (en)
AU (1) AU628074B2 (en)
CA (1) CA1338398C (en)
DE (1) DE68928614T2 (en)
DK (1) DK174456B1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07111588B2 (en) * 1990-04-11 1995-11-29 株式会社巴川製紙所 Magnetic toner
DE69415952T2 (en) * 1993-11-30 1999-06-10 Konishiroku Photo Ind Two-component type developer and imaging technique
EP0703505B1 (en) * 1994-08-31 1999-07-14 Mita Industrial Co., Ltd. Toner for two-component type developer
US5580691A (en) * 1994-08-31 1996-12-03 Mita Industrial Co., Ltd. Toner for a two-component type developer
JPH0876417A (en) * 1994-08-31 1996-03-22 Mita Ind Co Ltd Toner for binary system developer
EP0703503A1 (en) * 1994-08-31 1996-03-27 Mita Industrial Co., Ltd. Toner for a two-component type developer
EP0704767A1 (en) * 1994-08-31 1996-04-03 Mita Industrial Co., Ltd. A two-component type developer
JP3009825B2 (en) * 1994-09-02 2000-02-14 三田工業株式会社 Image forming method
JP3021295B2 (en) * 1994-09-02 2000-03-15 三田工業株式会社 Image forming method
JP3021294B2 (en) * 1994-09-02 2000-03-15 三田工業株式会社 Development method
TW340198B (en) * 1996-06-10 1998-09-11 Mitsuta Industry Co Ltd Toner for two-component type developer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074745A (en) * 1980-04-09 1981-11-04 Ricoh Kk Developer for developing latent electostatic images
DE3140639A1 (en) * 1980-10-13 1982-06-16 Ricoh Co., Ltd., Tokyo Electrophotographic process
EP0125606A1 (en) * 1983-05-11 1984-11-21 Mita Industrial Co. Ltd. Apparatus for detecting the reasonable condition of developer in a copying machine
US4675268A (en) * 1981-11-26 1987-06-23 Konishiroku Photo Industry Co., Ltd. Process for transfer of a toner image utilizing a magnetic toner containing a binder resin and having gradual softening characteristics

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5785060A (en) * 1980-11-17 1982-05-27 Mita Ind Co Ltd Composite developer
US4414321A (en) * 1980-11-27 1983-11-08 Mita Industrial Co. Ltd. Dry composite blended magnetic developer of resin encapsulated fine magnetite and resin encapsulated coarse magnetite
JPS57124356A (en) * 1981-01-26 1982-08-03 Mita Ind Co Ltd Binary magnetic developer
JPS63276065A (en) * 1987-05-07 1988-11-14 Casio Electronics Mfg Co Ltd Developer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074745A (en) * 1980-04-09 1981-11-04 Ricoh Kk Developer for developing latent electostatic images
DE3140639A1 (en) * 1980-10-13 1982-06-16 Ricoh Co., Ltd., Tokyo Electrophotographic process
US4675268A (en) * 1981-11-26 1987-06-23 Konishiroku Photo Industry Co., Ltd. Process for transfer of a toner image utilizing a magnetic toner containing a binder resin and having gradual softening characteristics
EP0125606A1 (en) * 1983-05-11 1984-11-21 Mita Industrial Co. Ltd. Apparatus for detecting the reasonable condition of developer in a copying machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 13, no. 93 (P-838)[3441], 6th March 1989; & JP-A-63 276 065 (CASIO ELECTRONICS MFG CO., LTD) 14-11-1988 *

Also Published As

Publication number Publication date
DK174456B1 (en) 2003-03-24
AU4087289A (en) 1990-03-08
DK428689D0 (en) 1989-08-30
DK428689A (en) 1990-03-01
DE68928614D1 (en) 1998-04-30
CA1338398C (en) 1996-06-18
EP0357042A2 (en) 1990-03-07
AU628074B2 (en) 1992-09-10
DE68928614T2 (en) 1998-10-22
EP0357042B1 (en) 1998-03-25
ATE164459T1 (en) 1998-04-15

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