Global Patent Index - EP 0361939 A2

EP 0361939 A2 19900404 - A carrier for a developer.

Title (en)

A carrier for a developer.

Title (de)

Träger für Entwickler.

Title (fr)

Agent véhiculant pour développateur.

Publication

EP 0361939 A2 19900404 (EN)

Application

EP 89309928 A 19890929

Priority

JP 24868988 A 19880930

Abstract (en)

A carrier for a developer which satisfies the following relation: 1.7 </= X/Y </= 3.3 wherein X is the resistivity ( OMEGA .cm) of the carrier in a compressed state to which a DC voltage of 1000 V is applied, and Y is the resistivity ( OMEGA .cm) of the carrier in a state in which the carrier particles are linked together in a chain form in a magnetic field of 1600 gauss to which a DC voltage of 1000 V is applied, thereby constantly providing satisfactory developing characteristics regardless of variations in copying conditions.

IPC 1-7

G03G 9/10

IPC 8 full level

G03G 9/10 (2006.01)

CPC (source: EP US)

G03G 9/107 (2013.01 - EP US)

Designated contracting state (EPC)

CH DE FR GB IT LI NL

DOCDB simple family (publication)

EP 0361939 A2 19900404; EP 0361939 A3 19900725; JP H0296184 A 19900406; JP H0731422 B2 19950410

DOCDB simple family (application)

EP 89309928 A 19890929; JP 24868988 A 19880930