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    Easy-opening composite closure for hermetic sealing of a packaging container by double seaming
    2.
    发明授权
    Easy-opening composite closure for hermetic sealing of a packaging container by double seaming 失效
    易于开启的复合封闭件，用于通过双重接缝密封包装容器

    公开(公告)号：US5353943A

    公开(公告)日：1994-10-11

    申请号：US31804

    申请日：1993-03-15

    申请人： Donald W. Hayward

    发明人： Donald W. Hayward

    IPC分类号： B65D17/40 ,  B65D17/50 ,  B65D77/20

    CPC分类号： B65D77/2056 ,  B65D17/502 ,  B65D2517/0013 ,  B65D2517/0062 ,  B65D2517/5013 ,  B65D2517/5021 ,  B65D2517/5029 ,  B65D2517/5062 ,  B65D2517/5083 ,  B65D2517/5089

    摘要： An easy-opening closure for hermetic sealing of the open end of a packaging container includes an end member for being double-seamed to the open end of the container and having an interior ledge portion defining a large central opening and a composite lidding member of at least two polymer layers defining a predetermined peel strength at an interfacial plane for controlled delamination of the two layers. The composite lidding member covers the central opening and is bonded to the ledge portion to define a bond strength greater than the peel strength of the two polymer layers. The lidding member has a continuous ring-shaped notch cut into the bottom polymer layer adjacent the ledge portion and a discontinuous ring-shaped notch cut into the top polymer layer and spaced inwardly from the first notch to define a small unnotched portion between its ends and to define with the first notch a ring member therebetween which is connected at the unnotched portion to the central portion of the lidding member. With this construction, the force required to open the closure from the inside of the container is greater than the force required to open the closure from the outside of the container. The closure is circumferentially opened by upward pulling of the bonded overlapping portion of the composite lidding member to cause delamination and peeling of the top polymer layer from the bottom polymer layer bonded to the end member in an area between the first notch and an outside circumference of the lidding member and removal of the ring member between the first and second notches.

    摘要翻译： 用于封装容器的开口端的气密密封的容易开启的封闭件包括：端部构件，用于双重缝合到容器的开口端，并具有限定大的中心开口的内部凸缘部分和位于 至少两个聚合物层在界面处限定预定的剥离强度，以控制两层的分层。 所述复合封盖构件覆盖所述中心开口并且结合到所述凸缘部分以限定大于所述两个聚合物层的剥离强度的粘合强度。 封盖构件具有切割成邻近突出部分的底部聚合物层的连续的环形切口和切割到顶部聚合物层中并且与第一凹口间隔开的不连续的环形切口，以在其端部之间限定小的无切口部分， 在第一凹口处限定其间的环形构件，其在无切口部分处连接到封盖构件的中心部分。 利用这种结构，从容器内部打开封闭件所需的力大于从容器外部打开封闭件所需的力。 通过向上拉动复合盖板构件的接合重叠部分，使封闭件周向地开放，从而在顶部聚合物层与位于端部构件的底部聚合物层之间在第一缺口和外部周边之间的区域中脱层和剥离 封闭构件和环构件在第一和第二凹口之间的移除。