| 摘要 |
A buckle chute folding system for imparting a fold to a collation of paper sheets. The system includes: a substantially vertically oriented buckle chute; apair of upper and lower feeding rollers defining a feed nip upstream of the buckle chute; a third feed roller associated with the lower feed roller, the third feed roller and lower feed roller defining a feed nip; and a device for positively driving the upper feeding roller, whereby the collation of sheets is fed throughthe nips into the buckle chute without any shingling effects.
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