公开(公告)号：US3735893A

公开(公告)日：1973-05-29

申请号：US3735893D

申请日：1971-10-19

Applicant: ALUMINUM CO OF AMERICA

Inventor： GAYNER H ,  SMITH D A

IPC: B65D17/20

CPC classification number: B65D17/4011 ,  Y10S220/906

Abstract: A method of establishing a shielded container wall opening including providing a metal container wall panel having an adhesively bonded protective layer selected from the group consisting of polyolefin, copolymers of polyolefin-ethylene and ionomers of polyolefin. Providing a score line defined removable sector within the metal panel and an operating pull tab secured thereto. Thermally treating the container wall having the integral opening device at about 275* to 375*F for about 0.2 second to 4 minutes and preferably about 300* to 350*F for about 0.5 to 3 minutes. Operating the pull tab to initiate fracture of the score line and establish an opening in the container wall. Simultaneously elongating portions of the protective layer disposed in a generally underlying position with respect to the score line and severing the same to provide a shielding edge which is disposed protectively against the opening defining wall of the metal container wall panel. Feathering preferably including an average projection of about 0.002 to 0.010 inch beyond the metal opening defining wall.

Abstract translation: 一种建立屏蔽容器壁开口的方法，包括提供金属容器壁板，所述金属容器壁板具有选自聚烯烃，聚烯烃 - 乙烯和聚烯烃离聚物的共聚物的粘合保护层。 提供在金属面板内限定可移动扇区的刻痕线和固定到其上的操作拉片。 将具有整体打开装置的容器壁在约275°至375°F下热处理约0.2秒至4分钟，优选约300至350°F约0.5至3分钟。 操作拉片以开始刻痕线的断裂并在容器壁中建立开口。 将保护层的相对于刻痕线设置在大致下方位置的部分同时延伸，并将其切断，以提供保护性地抵靠金属容器壁板的开口限定壁设置的屏蔽边缘。 羽化优选地包括超过金属开口限定壁约0.002至0.010英寸的平均投影。