公开(公告)号：US3918378A

公开(公告)日：1975-11-11

申请号：US48925774

申请日：1974-07-17

Applicant: ALUMINUM CO OF AMERICA

Inventor： CLAWSON ROBERT G ,  WILLIS WILBURN C

IPC: B21D51/38 ,  B21D51/48 ,  B21D51/26

CPC classification number: B21D51/383 ,  B65D17/404

Abstract: A container wall or end closure is provided which has a hollow upwardly convex embossment formed in it, and at least one radially extending score line in an outer portion of the embossment which will be ruptured to form a vent opening in the closure when force is applied against the center of the embossment. The container wall may further include an inclined wall formed therein around the periphery of the embossment and a thinned zone or band of material in such wall to facilitate rupture of the score in the embossment. A method of forming such a container closure is also provided.

Abstract translation: 提供容器壁或端盖，其在其中形成有中空的向上凸起的压花，并且在压花的外部部分中的至少一个径向延伸的刻痕线将在施加力时被破裂以在封闭件中形成通气开口 反对浮雕的中心。 容器壁还可以包括围绕压花的周边形成的倾斜壁和在这种壁中的薄的区域或材料带，以便于压花中的刻痕破裂。 还提供了形成这种容器封闭件的方法。