发明名称 Opening of containers
摘要 Containers made of flexible material often have opening arrangements in the form of a tear strip for opening an outlet aperture. The tear strip constitutes a part of the container wall and is limited by a weakening line. To facilitate initiation of the tear-open operation a short length of the weakened line has the form of a cut or cuts extending fully through the material. Two or more cuts may form a lug or projection, and if located at a fold line of the container blank the lug or projection may be arranged to automatically extend outwards from the finished container.
申请公布号 US4197949(A) 申请公布日期 1980.04.15
申请号 US19780937172 申请日期 1978.08.28
申请人 TETRA PAK INTERNATIONAL AB 发明人 CARLSSON, LARS C
分类号 B65D5/06;B65D5/70;(IPC1-7):B65D5/54;B65D5/72 主分类号 B65D5/06
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