Other

Masami Hosokawa

Masaharu Iwai

Osamu Oshima

Shingo Inase

A process for preparing a magnet roller comprising a plurality of bar-like magnet pieces in a high working efficiency and in an improved adhesion accuracy, which comprises the steps of regulating the bonding position of at least two magnet pieces by their outer peripheral surfaces and their end surfaces, applying an adhesive from the inner surface side of the magnet pieces to the adhesion faces of the magnet pieces for bonding one magnet piece to another magnet piece to form a magnet block, and bonding and fixing the magnet block to a shaft. At least one of the adhesion faces which are in contact with each other may have a plurality of grooves to facilitate penetration of the adhesive into the interface of adjacent two magnet pieces.

Magnet roller and process for preparing the same

The object is to provide a magnet roller whereby picture quality can be improved by raising the magnetic flux density of the specified magnetic pole and/or other magnetic poles, and wherein this magnetic pole pattern can be achieved with low cost. In a magnet roller ( ) according to the invention that achieves this object, a plurality of magnet pieces ( ) are mounted at the periphery of a shaft ( ) by joining at joining faces and peaks ( ) of magnetic poles ( ) are generated on the lines of extension of joining faces ( ) by setting the directions of orientation magnetization ( ) of adjacent magnet pieces ( ) facing the joining faces ( ), the respective joining faces ( ) of the plurality of magnet pieces ( ) being provided along the roller radial directions.

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Mooka, Japan

Masami Hosokawa