Degassing container

Abstract

The present invention discloses a container comprising a circular end wall, a peripheral body wall, and an annular rolled end seam. A channel is created in the rolled end seam and is in communication with the interior of the container. A one-way valve forms a seal between the rolled end seam and an outer surface of the body wall. The one-way valve allows gases from the interior of the container to escape from the container during packaging.

1 . A method for forming a container, comprising:
 providing an end wall and a peripheral body wall;   rolling a periphery of the end wall with an end of the peripheral body wall to form a rolled end seam; and   after the rolling to form the end seam, providing a one-way seal structure between the rolled end seam and an outer surface of the peripheral body wall.   
     
     
         2 . A method as per  claim 1 , wherein the seal structure comprises a resilient material and wherein the seal structure deflects from the rolled end seam or from the outer surface of the peripheral body wall to allow gases to escape from an interior of the container. 
     
     
         3 . A method as per  claim 2 , further comprising:
 rolling the end wall and peripheral body wall such that the end wall and peripheral body wall are in a slightly spaced relationship to allow gases to escape from the interior of the container to an exterior of the container when the seal structure deflects from the rolled end seam or the outer surface of the peripheral body wall.   
     
     
         4 . A method as per  claim 3 , further comprising:
 applying a finish to an area along the rolled end seam or the outer surface of the peripheral body wall, wherein the area along which the finish is applied prevents the seal structure from adhering to the area.   
     
     
         5 . A method as per  claim 3 , further comprising:
 applying adhesive to an area along the rolled end seam or the outer surface of the peripheral body wall, and   attaching the seal structure to the area along the rolled end seam or the outer surface of the body wall of the container.   
     
     
         6 . A method as per  claim 5 , wherein the area is a region that is smaller than the periphery of the rolled end seam.