EP 0415727 A3 19910424 - TONER FOR DEVELOPING STATICALLY CHARGED IMAGES AND PROCESS FOR PREPARATION THEREOF
Title (en)
TONER FOR DEVELOPING STATICALLY CHARGED IMAGES AND PROCESS FOR PREPARATION THEREOF
Publication
Application
Priority
JP 22207189 A 19890829
Abstract (en)
[origin: EP0415727A2] A toner for developing statically charged images, comprising a binder resin, a colorant and a charge-controlling dye and a process for the preparation of this toner are disclosed. This toner consisting of particles composed of these components have a circularity of from 0.95 to 1.0, and the concentration of the dye on the surfaces of the toner particles is from 1.0 x 10<-><3> to 4 x 10<-><3> g/g. By dint of these characteristic features, the stability of the frictional chargeability characteristics of the toner is increased, and the contamination of a carrier, a developing device or the like with the dye can be prevented.
IPC 1-7
IPC 8 full level
G03G 9/09 (2006.01); G03G 9/08 (2006.01); G03G 9/087 (2006.01); G03G 9/097 (2006.01)
CPC (source: EP)
G03G 9/0806 (2013.01); G03G 9/0815 (2013.01); G03G 9/0825 (2013.01); G03G 9/0827 (2013.01)
Citation (search report)
- [Y] EP 0253289 A2 19880120 - KAO CORP [JP]
- [A] US 4613559 A 19860923 - OBER CHRISTOPHER K [CA], et al
- [Y] PATENT ABSTRACTS OF JAPAN vol. 13, no. 1 (P-808)(3349) 06 January 1989, & JP-A-63 210850 (MITA IND. CO. LTD.) 01 September 1988,
- [A] DATABASE WPIL, no. 89-018655 Derwent Publications Ltd.,London,GB, & JP-A-63293554 (CANON K.K.)
- [A] PATENT ABSTRACTS OF JAPAN vol. 13, no. 165 (P-860)(3513) 20 April 1989, & JP-A-64 2063 (RICOH CO. LTD.) 06 January 1989,
- [A] PATENT ABSTRACTS OF JAPAN vol. 10, no. 190 (P-474)() 04 July 1986, & JP-A-61 35457 (CANON INC.) 19 February 1986,
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0415727 A2 19910306; EP 0415727 A3 19910424; EP 0415727 B1 19941228; CA 2024161 A1 19910301; DE 69015515 D1 19950209; DE 69015515 T2 19950511; JP 2658006 B2 19970930; JP H0384558 A 19910410
DOCDB simple family (application)
EP 90309421 A 19900829; CA 2024161 A 19900828; DE 69015515 T 19900829; JP 22207189 A 19890829