MAGNETIC ROLLER AND METHOD FOR MANUFACTURING THE SAME

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PROBLEM TO BE SOLVED : To solve a problem of not being able to cope with the higher speed and higher image quality of a recent full-color machine since high magnetic flux density cannot be secured inexpensively in a conventional cylindrical magnet roller due to the securing of the high magnetic flux density by using an expensive rare earth based magnet block and the imbedding of the same in a groove in the axial direction of the cylindrical magnet. SOLUTION : The cylindrical magnet which is formed by molding a mixture mainly composed of ferromagnetic powder and a resin binder has the cylindrical magnet imbedded with a plurality of numbers of magnet pieces that are repulsed magnetically from each other in an indention in an outer periphery section. COPYRIGHT : (C)2010, JPO&INPIT