JPS5646249A - Magnetic toner for electrostatic transfer type copier - Google Patents

Magnetic toner for electrostatic transfer type copier

Info

Publication number
JPS5646249A
JPS5646249A JP12206979A JP12206979A JPS5646249A JP S5646249 A JPS5646249 A JP S5646249A JP 12206979 A JP12206979 A JP 12206979A JP 12206979 A JP12206979 A JP 12206979A JP S5646249 A JPS5646249 A JP S5646249A
Authority
JP
Japan
Prior art keywords
resin powder
static charge
resistivity
magnetic material
static
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.)
Pending
Application number
JP12206979A
Other languages
Japanese (ja)
Inventor
Rikuo Kashiwagi
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP12206979A priority Critical patent/JPS5646249A/en
Publication of JPS5646249A publication Critical patent/JPS5646249A/en
Pending legal-status Critical Current

Links

Landscapes

  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE: To form a superior copy unaffected by paper quality and humidity change, by using a toner consisting of a static charge retaining resin powder of high resistivity and a static charge inducing resin powder of low resistivity each containing a magnetic material, and each chargeable reverse in polarity to each other by friction.
CONSTITUTION: A static charge retentive resin powder of resistivity ≥1012Ω.cm containing a magnetic material, and a static charge inductive resin powder of resistivity ≥1011Ω.cm containing a magnetic material are mixed in the mixing ratio ranging 1:0.01W1:10 to prepare a toner. Both the resin powders are charged reversely in polarity to each other due to friction by selecting them properly. The 2 powders of particle diameter are selected in the range of 5W50μm. Development is effected by static electricity due to charging of the static charge retentive resin powder and electrostatic induction of the static charge inductive resin powder, and image transfer is effectively carried out in presence of the highly insulating static charge retentive resin powder independent of presence of the static charge inductive resin powder low in transfer efficiency, and a stable copy is formed unaffected by kinds of paper and change of the atmospheric humidity.
COPYRIGHT: (C)1981,JPO&Japio
JP12206979A 1979-09-25 1979-09-25 Magnetic toner for electrostatic transfer type copier Pending JPS5646249A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12206979A JPS5646249A (en) 1979-09-25 1979-09-25 Magnetic toner for electrostatic transfer type copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12206979A JPS5646249A (en) 1979-09-25 1979-09-25 Magnetic toner for electrostatic transfer type copier

Publications (1)

Publication Number Publication Date
JPS5646249A true JPS5646249A (en) 1981-04-27

Family

ID=14826861

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12206979A Pending JPS5646249A (en) 1979-09-25 1979-09-25 Magnetic toner for electrostatic transfer type copier

Country Status (1)

Country Link
JP (1) JPS5646249A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6686743B2 (en) * 2000-10-24 2004-02-03 Univation Technologies, Llc Apparatus for measuring the static charge of flowable solids

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53118054A (en) * 1977-03-09 1978-10-16 Hitachi Metals Ltd Magnetic toner
JPS5422835A (en) * 1977-07-21 1979-02-21 Toshiba Corp Magnetic toner
JPS5424028A (en) * 1977-07-25 1979-02-23 Canon Inc Developing method
JPS5616145A (en) * 1979-07-18 1981-02-16 Hitachi Metals Ltd Magnetic toner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53118054A (en) * 1977-03-09 1978-10-16 Hitachi Metals Ltd Magnetic toner
JPS5422835A (en) * 1977-07-21 1979-02-21 Toshiba Corp Magnetic toner
JPS5424028A (en) * 1977-07-25 1979-02-23 Canon Inc Developing method
JPS5616145A (en) * 1979-07-18 1981-02-16 Hitachi Metals Ltd Magnetic toner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6686743B2 (en) * 2000-10-24 2004-02-03 Univation Technologies, Llc Apparatus for measuring the static charge of flowable solids

Similar Documents

Publication Publication Date Title
GB1490584A (en) Electroscopic toner
JPS5692545A (en) Electrophotographic developing agent and developing method
JPS55127569A (en) Carrier for electrostatic image development
JPS5588070A (en) Developer for electrostatic image
JPS57128365A (en) Powder image transfer type electronic copier
JPS556308A (en) Magnetic toner composition for electrostatic transfer
JPS5445135A (en) Dry type developer for electrography
JPS54101328A (en) Developer for electrostatic image
JPS5797545A (en) Magnetic toner for electrophotography
JPS5532073A (en) Electrophotographic developing method
JPS5691241A (en) Transfer type one-component magnetic developer
JPS536040A (en) Manufacture of insulating magnetic toner for electrostatic development
JPS5616145A (en) Magnetic toner
JPS56159653A (en) Developer for electrostatic latent image
JPS54123956A (en) Dry type developer
JPS55120041A (en) Magnetic developer
JPS57204570A (en) Developing device of electrophotographic copying machine
JPS6444455A (en) Magnetic toner
JPS6429864A (en) Carrier for developing electrostatic latent image
JPS565559A (en) Magnetic toner
JPS56102859A (en) Electrophotographic method
JPS56104340A (en) Electrophotographic method
JPS54122127A (en) Magnetic toner development process
JPS5657041A (en) Magnetic toner for electrostatic transfer type copying machine
JPS55133071A (en) Magnetic toner image transfer method