| 摘要 |
PURPOSE:To make a titled device small-sized and inexpensive, by providing a press-contact roll which is made to press-contact with a photosensitive drum, on a shaft part of a non-magnetic material cylinder constituting a magnet roll, and a shaft part of a permanent magnet roll, and rotating one of both press- contact rolls as one body with the shaft part. CONSTITUTION:A magnet roll 2 is provided with a non-magnetic material cylinder having a shaft part 3 in one end part, and a permanent magnet having plural symmetrical magnetic poles with a shaft part 4 in its opposite end part. A member having a large coefficient of friction is molded on the outside edge part of press-contact rolls 9, 10 fixed to each shaft part 3, 4 so that the non- magnetic material cylinder and the permanent magnet roll rotate as one body, and also, the outside diameter of both the press-contact rolls 9, 10 is formed larger than the outside diameter of the magnetic roll 2. Both these press-contact rolls 9, 10 are pressed against a photosensitive drum 1 by a pressing means, by which a constant space is held between the photosensitive drum 1 and the magnet roll 2. |
