公开(公告)号：US3857329A

公开(公告)日：1974-12-31

申请号：US38025773

申请日：1973-07-18

申请人： LEHMACHER M ,  LEHMACHER H

发明人： LEHMACHER M ,  LEHMACHER H

IPC分类号： B31B19/86 ,  B31B1/86

CPC分类号： B31B2160/10 ,  B31B70/00 ,  B31B70/864 ,  Y10S493/926

摘要： To make an expansible side-infolded carrying bag of thermoplastic synthetic plastic film, with opposed grip bars bonded across the mouth top by relatively simple apparatus, a flat tubular film web as starting material is continuously formed from single layer stock, the web is rectangularly oppositely edge-notched at locations corresponding to bag lengths, the edges are infolded to the notching depth and successive bag lengths severed at leading notch edges, defining on the web end a mouth readily opened for easy insertion, for each bag without infold interference, of paired superimposed grips bars thereafter welded to respective mouth margins; a transverse bottom seam for an open-mouthed bag or a mouth-closing seam below the grip bars for a bottom-filled packaging bag being welded before or simultaneously with the grip welds; with disclosure of method variations.

摘要翻译： 为了制造可膨胀的热塑性合成塑料薄膜的侧面折叠的携带袋，具有通过相对简单的装置粘合在口顶上的相对的把手，由单层原料连续形成作为起始材料的扁平管状薄膜腹板， 边缘在对应于袋子长度的位置处被切口，边缘被折叠到开槽深度并且连续的袋子长度在引导切口边缘处切断，在纸幅端部限定了容易打开以容易地插入的嘴，对于每个袋子，没有信号干扰，成对 叠加的手柄条随后焊接到相应的嘴缘; 用于打开口袋的横向底部接缝或在抓握杆下方的封闭接缝，用于在夹紧焊缝之前或同时焊接底部填充的包装袋; 披露方法变体。