| 摘要 |
<p>A posture control device (1) has a posture detecting section (12), an upstream conveying section (14), a posture control section (16), and a downstream conveying section (18) along a conveying path (10) for mail items. The distance from a nip of the upstream conveying section (14) and a nip of the posture control section (16) (D-E distance) is designed to be substantially as long as the longest one of the mail items to be processed by the device which has the greatest length along a conveying direction. The distance from the nip of the posture control section (16) and a nip of the downstream conveying section (18) (E-F distance) is designed to be slightly longer the shortest one of the mail items to be processed by the device which has the shortest length along the conveying direction.
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