DEVELOPING DEVICE, DEVELOPER CARRIER, MAGNETIC BRUSH ELECTRIFYING DEVICE, AND MAGNETIC PARTICLE CARRIER FOR ELECTRIFICATION

摘要

PROBLEM TO BE SOLVED: To provide a member for preventing such trouble as toner leak, age blotching, and fogging due to abrasion of a resin coating layer on the surface of a developing sleeve of a developing device at a large-force applied position corresponding to a toner sealing part, and for also preventing carrier fogging and a decrease in injection electrification due to an easily scraped sealed part of a resin coating layer on the surface of a magnetic brush electrifying device.;SOLUTION: In order to improve wear resistance, high-hardness particles on the surface of which unevenness can be formed are added at a position corresponding to the end areas of a a developer carrier or a carrier for magnetic particles for electrification, in particular a magnetic seal part. Further, a central part area has a material constitution which is suitable to development or electrification.;COPYRIGHT: (C)2004,JPO&NCIPI