发明名称 Stack of bags each having congruent cutouts and perforated lines
摘要 A stack of bags is provided, which have been made from rectangular sections of synthetic thermoplastic film. The sections have been folded onto themselves about bottom fold lines and provided with side seam welds. Their open ends, the sections are also provided with centrally disposed, punched grip holes and with laterally disposed corner portions, which are defined by perforation lines and formed with aligned stacking or hanger holes. Only the rear wall of each bag is provided with perforation lines defining the two upper corner portions of the rear wall. The front wall of the bag is formed in its corner portions with apertures which are defined by cutouts, which are substantially congruent to and register with the perforation lines. A process of manufacturing such stack of bags and an apparatus for carrying out such process are also disclosed.
申请公布号 US4903839(A) 申请公布日期 1990.02.27
申请号 US19870084950 申请日期 1987.08.13
申请人 WINDMOLLER & HOLSCHER 发明人 MATTIEBE, GUENTER;ULLMANN, KLAUS
分类号 B31B19/14;B31B19/98;B31B23/00;B65D33/00 主分类号 B31B19/14
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