EP 1621938 A1 20060201 - Magnetic roller with protruding magnetic poles for an image developing means
Title (en)
Magnetic roller with protruding magnetic poles for an image developing means
Title (de)
Magnetwalze mit hervorstehenden Magnetpolen für eine Bildentwicklungeinheit
Title (fr)
Rouleau magnétique avec pôles magnétiques saillants pour un dispositif de développement d'image
Publication
Application
Priority
EP 04017695 A 20040727
Abstract (en)
A magnetic roller for image developing means of printer comprises: a roller body (3), which is made of rubber, plastic, or artificial resin mixed with magnetic materials and formed as a unity; a plurality of S magnetic poles (41,42) and N magnetic poles (51,52), which are formed in the outer circle of the roller body (3) as a unity, and form in strip-shape in the direction of central axis of roller body (3), each magnetic S pole (41,42) and magnetic N pole (51,52) is arranged separately; and an axis of roller (6), which is made of soft magnets or the same material with roller body (3) and passed through the center of roller body (3). It is characterized in that: said roller body (3) is a non-cylinder body, in which the adjacent area (71-74) of magnetic poles is hollow, so that magnetic angle of magnetic poles (41,42,51,52) in the magnetic roller can be more accurate, magnetic force can be more strengthened, and the volume of materials would be reduced to lower the cost.
IPC 8 full level
G03G 15/09 (2006.01)
CPC (source: EP)
G03G 15/0921 (2013.01)
Citation (search report)
[X] PATENT ABSTRACTS OF JAPAN vol. 014, no. 320 (E - 0950) 10 July 1990 (1990-07-10)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 04017695 A 20040727