| 摘要 |
A sheet feeding unit including a feeding system, a controlling system to control the feeding system, and a detecting system, which is provided in between the target position and the feeding system and is adapted to detect a predetermined position of the recording sheet at a detecting position, is provided. The controlling system controls the feeding system to carry the recording sheet at a second feeding speed, at a third feeding speed, and at a first feeding speed, so that a period in which the predetermined position of the recording sheet being carried at the first feeding speed changed from the third feeding speed is carried from the detecting position to the target position is equivalent to a period in which the predetermined position of the recording sheet being carried constantly at the first feeding speed is carried from the detecting position to the target position.
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