Apparat zum Zuführen von Bögen.

摘要

Apparatus for moving a document (22) towards the bottom of a document track (16) as the document (22) is moved in first and second directions within the track (16) includes a feed unit (28) positioned on one side of the document track (16) and a cooperating unit (30) positioned on the opposed side of the track. The cooperating unit (30) has a rod (36) which is pivotally supported in a support (40). A high friction roller (52) is secured to the top end of the rod (36) and a low friction roller (54) is rotatably supported on the lower end of the rod (36). The feed unit (128) has an idler roller (34) positioned opposite to the high friction roller (52) and also has a drive roller (35) positioned opposite to the low friction roller (54) in the cooperating unit (30). As the document (22) is moved in a first direction in the document track (16), the high friction roller (52) causes the rod (36) to pivot slightly, thereby causing the low friction roller (54) to cant slightly, producing a downward component of force on the document (22) as it is moved in the first direction. When the document (22) is moved in the opposite direction, the low friction roller (54) is canted slightly in the opposite direction to again produce a downward component of force on the document (22) as it is moved in the second direction.