EP 0708378 B1 20001213 - Two-component type developer, developing method and image forming method
Title (en)
Two-component type developer, developing method and image forming method
Title (de)
Entwickler des Zweikomponententyps, Entwicklungsverfahren und Bildherstellungsverfahren
Title (fr)
Révélateur du type à deux composants, procédé de développement et procédé de formation d'image
Publication
Application
Priority
JP 26442894 A 19941005
Abstract (en)
[origin: EP0708378A2] A two-component type developer for developing an electrostatic image is constituted by at least a toner and a magnetic carrier. The toner has a weight-average particle size D4 of at most 10 mu m and a number-average particle size D1 satisfying D4/D1 </= 1.5. The magnetic carrier comprises composite particles comprising magnetic iron compound particles, non-magnetic metal oxide particles, and a binder comprising a phenolic resin. The composite particles contain the magnetic iron compound and the non-magnetic metal oxide in a total proportion of 80 - 99 wt. %. The magnetic iron compound particles have a number-average particle size ra, and the non-magnetic metal oxide particles have a number-average particle size rb satisfying rb/ra > 1.0.
IPC 1-7
IPC 8 full level
G03G 9/08 (2006.01); G03G 9/10 (2006.01); G03G 9/107 (2006.01); G03G 13/09 (2006.01)
CPC (source: EP KR US)
G03G 9/0819 (2013.01 - EP); G03G 9/1075 (2013.01 - EP KR US); G03G 9/108 (2020.08 - EP KR US); G03G 9/1085 (2020.08 - EP KR US); G03G 9/10884 (2020.08 - EP KR US); G03G 13/09 (2013.01 - EP)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0708378 A2 19960424; EP 0708378 A3 19960501; EP 0708378 B1 20001213; CN 1099054 C 20030115; CN 1130767 A 19960911; DE 69519620 D1 20010118; DE 69519620 T2 20010517; HK 1014051 A1 19990917; KR 0163996 B1 19990320; KR 960015106 A 19960522
DOCDB simple family (application)
EP 95306880 A 19950929; CN 95119963 A 19951005; DE 69519620 T 19950929; HK 98115373 A 19981224; KR 19950033832 A 19951004