| 摘要 |
A paper transport system includes an apparatus (24) for controlling movement of the sheets (S1,S2) along the predetermined course (P) to provide sheet buffering. The apparatus (24) includes first (32) and second (34) friction surfaces mounted for movement in orbital paths on opposite sides of the predetermined course (P) in opposed relationship to define a nip (30) through which the paper sheets (S1,S2) pass. A selectively operable drive (40,42) is provided for independently controlling the movement of the first (32) and second (34) friction surfaces, and the first friction surface (32) has a coefficient of friction with the paper sheets (S1,S2) which is greater than the coefficient of friction of the second surface (34) with the paper sheets (S1,S2) which is in turn greater than the coefficient of friction between the paper sheets (S1,S2). In an alternative embodiment (Fig. 6), the friction surfaces are provided on corrugation feed rolls (68). <IMAGE> |
