| 摘要 |
The invention relates to stacking flat articles, such as tube sections, bags or sacks, with two spaced apart hubs arranged to rotate in synchronism on a horizontal axis and carrying respective spiders, the arms of which are equally angularly spaced and on their leading sides, in the sense of rotation, carry suction nozzles, with a receiving or carrying conveyor for the article disposed between the arms adjacent to the horizontal plane which contains the horizontal axis and protrude beyond the articles to such an extent that the side edges of the articles extend, at least in part, to the planes in which the arms are rotatable. A series of needles are disposed on the side of the axis which is opposite to the receiving conveyor and are closely spaced from the arms of one of the spiders and extend approximately parallel to that one of the arms which is in a vertical position, to enter perforations of the articles as the articles are delivered by the arms. The receiving conveyor is preceded by a pair of pinch rollers, which are formed with spaced apart annular grooves and air blast nozzles are provided in the annular grooves on both side of a sheeting web, with additional air blast nozzles arranged in a row extending in the direction of conveyance and disposed laterally between the receiving conveyor and the planes in which the arms are rotatable. |
