JPS55127568A - Powder developer - Google Patents

Powder developer

Info

Publication number
JPS55127568A
JPS55127568A JP3422179A JP3422179A JPS55127568A JP S55127568 A JPS55127568 A JP S55127568A JP 3422179 A JP3422179 A JP 3422179A JP 3422179 A JP3422179 A JP 3422179A JP S55127568 A JPS55127568 A JP S55127568A
Authority
JP
Japan
Prior art keywords
resin
powder
coloring
iron powder
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
JP3422179A
Other languages
Japanese (ja)
Other versions
JPS5924414B2 (en
Inventor
Toshiaki Narisawa
Seiji Okada
Hirofumi Okuyama
Kiyohide Muramatsu
Akio Yagishita
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 JP54034221A priority Critical patent/JPS5924414B2/en
Priority to DE2931087A priority patent/DE2931087C2/en
Publication of JPS55127568A publication Critical patent/JPS55127568A/en
Priority to US06/232,805 priority patent/US4455361A/en
Priority to US06/320,609 priority patent/US4513075A/en
Priority to US06/501,800 priority patent/US4522909A/en
Publication of JPS5924414B2 publication Critical patent/JPS5924414B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Developing Agents For Electrophotography (AREA)
  • Photoreceptors In Electrophotography (AREA)

Abstract

PURPOSE: To obtain powder developer excelling in secular stability of toner coloring matter, with less filming and throw-off of toner on carrier surface, by blending resin coated iron powder and specified coloring resin powder.
CONSTITUTION: Iron powder (A) resin-coated with mixture of styrene butadiene copolymer and polybutadiene (butadiene content; 7.5W100wt%), and coloring resin powder (B) made of mixture (bonded resin) (a) of epoxy resin 50W100wt% and styrene methacrylic ester copolymer 0W50wt%, coloring agent (b) made of carbon and nigrosine dye, and charge control agent (quaternary ammonium alkyl sulfonate, polyamine, etc.) (c) are blended so that the ratio of total surface of iron powder A to projected area of coloring resin powder B may be 1:0.5W2.
COPYRIGHT: (C)1980,JPO&Japio
JP54034221A 1978-08-01 1979-03-26 powder developer Expired JPS5924414B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP54034221A JPS5924414B2 (en) 1979-03-26 1979-03-26 powder developer
DE2931087A DE2931087C2 (en) 1978-08-01 1979-07-31 Electrostatographic developer material
US06/232,805 US4455361A (en) 1978-08-01 1981-02-09 Process for preparing developer materials for electrostatic images
US06/320,609 US4513075A (en) 1978-08-01 1981-11-12 Developer materials for electrostatic images
US06/501,800 US4522909A (en) 1978-08-01 1983-06-07 Process for preparing electrostatic developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54034221A JPS5924414B2 (en) 1979-03-26 1979-03-26 powder developer

Publications (2)

Publication Number Publication Date
JPS55127568A true JPS55127568A (en) 1980-10-02
JPS5924414B2 JPS5924414B2 (en) 1984-06-09

Family

ID=12408083

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54034221A Expired JPS5924414B2 (en) 1978-08-01 1979-03-26 powder developer

Country Status (1)

Country Link
JP (1) JPS5924414B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002229260A (en) * 2001-01-30 2002-08-14 Dainippon Ink & Chem Inc Electrostatic charge image developing toner

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60104411U (en) * 1983-12-16 1985-07-16 株式会社　日本除雪機製作所 Snowplow chute device
KR102669881B1 (en) * 2022-02-08 2024-05-28 (주)엘오티베큠 Turbo molecular pump comprising buffer chamber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002229260A (en) * 2001-01-30 2002-08-14 Dainippon Ink & Chem Inc Electrostatic charge image developing toner

Also Published As

Publication number Publication date
JPS5924414B2 (en) 1984-06-09

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