EP 0703502 A1 19960327 - Positively-charging mono-component toner and developing method using same

Title (en)

Positively-charging mono-component toner and developing method using same

Title (de)

Positiv geladener Einkomponententoner und Entwicklungsverfahren unter seiner Verwendung

Title (fr)

Poudre de toner à chargement positif et procédé de développement l'utilisant

Publication

EP 0703502 A1 19960327 (EN)

Application

EP 95305134 A 19950721

Priority

JP 17087894 A 19940722
JP 21975594 A 19940914

Abstract (en)

A positively-charging mono-component non-magnetic toner contains at least a binder resin and a coloring agent, wherein the binder resin is a polyester resin having an acid value of 5 mgKOH/g or below, and the toner has the maximum positive charge of 30 mu C/g or below. And, a positively-charging mono-component toner contains at least a binder resin and a coloring agent, wherein the toner has a surface energy gamma s of 30 to 40 mN/m. A developing method using a positively-charging mono-component toner uses a toner having a surface energy gamma s of 30 to 40 mN/m as the positively-charging mono-component toner, and the toner for developing an electrostatic latent image has a total charge of 2 mu C/g or above, or a total charge charged to a opposite polarity when developing an electrostatic latent image is 20% or below of the absolute value of a total charge charged to a normal polarity.

IPC 1-7

G03G 9/087; G03G 9/08

IPC 8 full level

G03G 9/08 (2006.01); G03G 9/087 (2006.01)

CPC (source: EP)

G03G 9/0821 (2013.01); G03G 9/0823 (2013.01); G03G 9/08755 (2013.01); G03G 9/08782 (2013.01); G03G 9/0819 (2013.01)

Citation (applicant)

BULLETIN OF ADHESION SOCIETY OF JAPAN, vol. 18, no. 3, 1972, pages 131 - 141

Citation (search report)

[XA] EP 0463822 A2 19920102 - FUJITSU LTD [JP]
[X] EP 0462785 A2 19911227 - MITSUBISHI RAYON CO [JP]
[X] GB 2237399 A 19910501 - ARAKAWA KAGAKU KABUSHIKI KAISH [JP]
[X] GB 2207438 A 19890201 - NIPPON SYNTHETIC CHEM IND
[X] GB 2198141 A 19880608 - NIPPON SYNTHETIC CHEM IND
[X] EP 0333498 A2 19890920 - MITSUBISHI RAYON CO [JP]
[A] EP 0241160 A2 19871014 - TOSHIBA KK [JP]

Designated contracting state (EPC)

DE GB

DOCDB simple family (publication)

EP 0703502 A1 19960327; EP 0703502 B1 20031029; CN 1119706 C 20030827; CN 1129816 A 19960828; DE 69532023 D1 20031204; DE 69532023 T2 20050324

DOCDB simple family (application)

EP 95305134 A 19950721; CN 95115258 A 19950721; DE 69532023 T 19950721