| 摘要 |
An apparatus for stacking flattened-out bags has a stacking drum rotatable in one rotational sense about a stacking drum axis at a stacking station which subdivides a conveyor into an upstream stretch that feeds the flattened-out bags one at a time to the drum and a downstream stretch which carries the stacks of bags away from the station. A pressure drum at the station is rotatable in the opposite directional sense about an axis parallel to that of the stacking drum. An axially extending array of generally radially extending pickup needles is provided on the stacking drum pointed forwardly in the respective rotational sense. An axially extending pusher bar is provided on the pressure drum and at least one spot welder is also provided on this pressure drum adjacent the pusher. The drums are rotated in the respective senses at the same peripheral speed which is generally equal to the transport speed of the sheets so as to engage the sheets as same arrive at the station between the needles and the pusher bar and to weld each sheet with the underlying sheet. A radially displaceable stripper element is provided on the stacking drum immediately upstream of the needles for pushing a welded-together stack or pad from the stacking drum.
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