公开(公告)号：US3967544A

公开(公告)日：1976-07-06

申请号：US511836

申请日：1974-10-03

申请人： Herbert Brock ,  Glenroy G. Blatz ,  James B. Honn

发明人： Herbert Brock ,  Glenroy G. Blatz ,  James B. Honn

IPC分类号： B31B29/00 ,  B31B33/26

CPC分类号： B31B29/00 ,  B31B2221/20 ,  B31B2221/407 ,  Y10S493/936

摘要： Apparatus and process for continuously and repetitively producing grocery sacks from a thermoplastic web at high speed, including particularly a folding operation involving applying grasping action to bag blanks formed from a heat sealed gusseted flattened tubular web of, e.g., high density polyethylene at the upper and lower portions thereof, respectively, causing said portions to be forwarded at differential longitudinal speeds whereby a rough folded bag bottom is formed. Preferably, the web is flexed as by introduction of air to the bag blank or sack to release the respective web faces and facilitate folding. A complete apparatus includes sealing, cutting, folding and pressing means and may incorporate printing and like ancillary features.

摘要翻译： 尤其涉及一种折叠操作的装置和方法，该方法特别涉及一种折叠操作，所述折叠操作涉及将抓握作用施加到由上部的例如高密度聚乙烯的热密封角撑扁平扁平管状网形成的袋坯料上， 其分别使得所述部分以不同的纵向速度前进，由此形成粗糙的折叠袋底部。 优选地，纤维网通过将空气引入袋坯料或袋中而弯曲以释放相应的织物表面并便于折叠。 完整的装置包括密封，切割，折叠和压制装置，并且可以包括印刷和类似的辅助特征。