| 摘要 |
A roller including: an outer peripheral portion coming into contact with a sheet; an inner peripheral portion; and a plurality of connection ribs for connecting the outer peripheral portion and the inner peripheral portion to each other, in which the outer peripheral portion and the inner peripheral portion have a cylindrical configuration and are arranged concentrically, and in which the connection ribs are inclined by a predetermined angle with respect to a straight line radially extending from an axis of the roller.
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