JPS6132858A - Image forming method - Google Patents

Image forming method

Info

Publication number
JPS6132858A
JPS6132858A JP15327084A JP15327084A JPS6132858A JP S6132858 A JPS6132858 A JP S6132858A JP 15327084 A JP15327084 A JP 15327084A JP 15327084 A JP15327084 A JP 15327084A JP S6132858 A JPS6132858 A JP S6132858A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
carrier
toner
magnetic material
grain size
average grain
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.)
Expired - Lifetime
Application number
JP15327084A
Other versions
JPH0364063B2 (en )
Inventor
Ryuhei Kasuya
Fumio Koizumi
Takeki Okuyama
Kunio Shigeta
Original Assignee
Konishiroku Photo Ind 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

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00Electrographic processes using a charge pattern
    • G03G13/06Developing
    • G03G13/08Developing using a solid developer, e.g. powder developer
    • G03G13/09Developing using a solid developer, e.g. powder developer using magnetic brush

Abstract

PURPOSE:To form stably a sharp image having high density without fogging for a long period of time in image formation including a stage for developing the latent image of a carrying body by using a toner at a ratio within a specific range with a carrier when the average grain size and true specific gravity of the toner and carrier are specified to prescribed values. CONSTITUTION:The toner concn. Tc of the two-component developer, i.e., the ratio (wt%) of the content of the toner with respect to the carrier is maintained within the range shown by the formula where the average grain size of the toner is designated as r1mum, the average grain size of the carrier as r2mum, the true specific gravity of the toner as rho1 and the true specific gravity of the carrier as rho2. The carrier consists of the particle powder which is formed by dispersing and incorporating the pulverous powder of a magnetic material into a binder resin such as styrene or vinyl ketone and has 10-50mum average grain size. Metals such as iron and cobalt including ferrite and magnetite exhibiting strong magnetisum or the alloy thereof, etc. are used for the magnetic material used for the pulverous powder of the magnetic material. The average grain size of the pulverous powder of the magnetic material is about 0.05-3mum and the ratio of te content of the pulverous magnetic material powder is 40-90wt% by the weight of the carrier.
JP15327084A 1984-07-25 1984-07-25 Expired - Lifetime JPH0364063B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15327084A JPH0364063B2 (en) 1984-07-25 1984-07-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15327084A JPH0364063B2 (en) 1984-07-25 1984-07-25

Publications (2)

Publication Number Publication Date
JPS6132858A true true JPS6132858A (en) 1986-02-15
JPH0364063B2 JPH0364063B2 (en) 1991-10-03

Family

ID=15558786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15327084A Expired - Lifetime JPH0364063B2 (en) 1984-07-25 1984-07-25

Country Status (1)

Country Link
JP (1) JPH0364063B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6440846A (en) * 1987-08-07 1989-02-13 Fuji Xerox Co Ltd Carrier for electrophotographic developer
US5688622A (en) * 1994-09-09 1997-11-18 Minolta Co., Ltd. Developing method
US5736287A (en) * 1996-03-14 1998-04-07 Minolta Co., Ltd. Development method
US5849452A (en) * 1996-03-14 1998-12-15 Minolta Co., Ltd. developing method using an oscillated electric field and including a specified toner and carrier
US6136487A (en) * 1996-03-15 2000-10-24 Minolta Co., Ltd. Developing method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6440846A (en) * 1987-08-07 1989-02-13 Fuji Xerox Co Ltd Carrier for electrophotographic developer
US5688622A (en) * 1994-09-09 1997-11-18 Minolta Co., Ltd. Developing method
US5736287A (en) * 1996-03-14 1998-04-07 Minolta Co., Ltd. Development method
US5849452A (en) * 1996-03-14 1998-12-15 Minolta Co., Ltd. developing method using an oscillated electric field and including a specified toner and carrier
US6136487A (en) * 1996-03-15 2000-10-24 Minolta Co., Ltd. Developing method

Also Published As

Publication number Publication date Type
JPH0364063B2 (en) 1991-10-03 grant

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term