Magnet roller.

摘要

A magnet roller including a plurality of magnets around a ferro-magnetic shaft, there being the same number of magnets as desired poles on the roller circumference, and the magnets including at least one pair of adjacent magnets which make sufficient magnetic contact with each other apart from via said shaft, one of the magnets of the pair being an assistant magnet to the other as well as having a pole on the roller circumference, the said one magnet being so arranged that its magnetic flux has a directional component perpendicular to the magnetised direction of the said other magnet of the pair.