公开(公告)号：US4918902A

公开(公告)日：1990-04-24

申请号：US225838

申请日：1988-07-29

申请人： Tohru Honma ,  Shigeki Mori ,  Kunihiko Ohya ,  Shiro Matsumoto ,  Akira Nakata ,  Ichiro Abe ,  Naoto Hosaka

发明人： Tohru Honma ,  Shigeki Mori ,  Kunihiko Ohya ,  Shiro Matsumoto ,  Akira Nakata ,  Ichiro Abe ,  Naoto Hosaka

IPC分类号： B65B31/00 ,  B65B7/28 ,  B65B31/04 ,  B67B3/00 ,  B67C3/22

CPC分类号： B65B7/2878 ,  B65B31/046 ,  B67B3/00 ,  B67C3/222

摘要： The lower edge of the peripheral wall of a can cap and the upper edge of a can barrel are spaced from each other by a gap therebetween. Streams of an inert gas from different groups of injector nozzles are injected, from outside of the gap, through the gap into the can cap and the can barrel, respectively, to replace air in the can cap and the can barrel with the injected gas. Then, the can barrel is fitted in to the can cap, and welded thereto to entrap the injected gas in the can barrel and the can cap.