JPS568153A - Electrophotographic developer - Google Patents

Electrophotographic developer

Info

Publication number
JPS568153A
JPS568153A JP6283280A JP6283280A JPS568153A JP S568153 A JPS568153 A JP S568153A JP 6283280 A JP6283280 A JP 6283280A JP 6283280 A JP6283280 A JP 6283280A JP S568153 A JPS568153 A JP S568153A
Authority
JP
Japan
Prior art keywords
magnetic
carrier powder
toner
magnetic brush
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.)
Pending
Application number
JP6283280A
Other languages
Japanese (ja)
Inventor
Akio Kobi
Yasusada Morishita
Masayasu Anzai
Kazumi Tokunaga
Yasuo Kikuchi
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.)
Koki Holdings Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Ltd
Hitachi Koki Co 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 Ltd, Hitachi Koki Co Ltd filed Critical Hitachi Ltd
Priority to JP6283280A priority Critical patent/JPS568153A/en
Publication of JPS568153A publication Critical patent/JPS568153A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Developing For Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE: To endow with high speed recording performance and high reliability an electrophotographic developer consisting of a magnetic carrier powder and a toner for nonbias-reversal development, by using a resin-coated carrier powder allowing a magnetic brush to have a specified volume resistivity value or more under specified conditions.
CONSTITUTION: A magnetic brush of a developer consisting of a magnetic carrier powder and a toner powder (weight ratio 100:5) is formed between electrostatic recording drum 1 and magnet roller 5 rotating at 50cm/sec peripheral speed and having a magnetic intensity of 800 gauss, and at that time an amount of resin coat in the magnetic carrier powder is adjusted so as to prepare a developer exhibiting a magnetic brush resistivity of ≥3×109ohm.cm when DC 100V is applied. The carrier powder is used in an amount of 2W10pts.wt. per 100pts.wt. toner, thus permitting reversal development to be made by self-bias voltage caused by the magnetic brush, and a superior image to be obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP6283280A 1980-05-14 1980-05-14 Electrophotographic developer Pending JPS568153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6283280A JPS568153A (en) 1980-05-14 1980-05-14 Electrophotographic developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6283280A JPS568153A (en) 1980-05-14 1980-05-14 Electrophotographic developer

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP14774876A Division JPS5372627A (en) 1976-12-10 1976-12-10 Developing agent and reversal development

Publications (1)

Publication Number Publication Date
JPS568153A true JPS568153A (en) 1981-01-27

Family

ID=13211680

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6283280A Pending JPS568153A (en) 1980-05-14 1980-05-14 Electrophotographic developer

Country Status (1)

Country Link
JP (1) JPS568153A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61109773U (en) * 1984-12-24 1986-07-11
JPH0377964A (en) * 1989-08-21 1991-04-03 Mita Ind Co Ltd Two-component type dry developer
JPH03226763A (en) * 1990-01-31 1991-10-07 Mita Ind Co Ltd Preparation of developer
CN105165293A (en) * 2015-08-28 2015-12-23 安庆市鸿旺食品有限公司 Sweet potato storage box

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61109773U (en) * 1984-12-24 1986-07-11
JPH0377964A (en) * 1989-08-21 1991-04-03 Mita Ind Co Ltd Two-component type dry developer
JPH03226763A (en) * 1990-01-31 1991-10-07 Mita Ind Co Ltd Preparation of developer
CN105165293A (en) * 2015-08-28 2015-12-23 安庆市鸿旺食品有限公司 Sweet potato storage box

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