Cover and container combination for seal tight engagement

Abstract

A cover and container combination for enclosing products in an air and/or liquid seal tight engagement comprises a cover with a rim portion defining an inverted U-shaped cross-section consisting of an inner horizontal wall and a pair of opposite inner vertical side walls, the inner horizontal wall displaying a downwardly extending continuous rib. The container has a side wall with an upper edge consisting of a top wall and a pair of opposite side walls, the top wall of the container displaying a continuous recess. The width of the rib is slightly greater than the width of the recess so as to provide a tight sealing fit when the rib is received in the recess when the cover is engaged to the container.

1 . A cover and container combination for enclosing products in an air and/or liquid seal tight engagement comprising: (a) a cover having a central portion and a rim portion, said rim portion defining an inverted U-shaped cross section consisting of an inner horizontal wall and a pair of opposite inner vertical side walls, said inner horizontal wall displaying a downwardly extending continuous rib having a given width and height; and (b) a container having a bottom wall, a side wall and an open end adapted to be closed by said cover; said side wall of said container having an upper edge consisting of a top wall and a pair of opposite side walls; said top wall of said container displaying a continuous recess having a given width and depth; said given width of said rib being slightly greater than the given width of said recess so as to provide a tight sealing fit when said rib is received in said recess when said cover is engaged to said container.  
     
     
         2 . A combination as defined in  claim 1 , wherein said top wall of said upper edge and said inner wall of said cover are spaced from one another thereby defining an air gap to provide a compression chamber therebetween when said cover is in a seal tight engagement with said container.  
     
     
         3 . A combination as defined in  claim 1 , wherein said given height of said rib is slightly smaller than said given depth of said recess so as to provide an air gap between said rib and said recess when said cover is in a seal tight engagement with said container.  
     
     
         4 . A combination as defined in  claim 1 , wherein an outermost wall of said opposite walls of said cover displays an inwardly extending shoulder and wherein an outermost wall of said opposite walls of said inner edge displays an inwardly horizontal portion which rests on said shoulder when said cover is in a seal tight engagement with said container.  
     
     
         5 . A combination as defined in  claim 1 , wherein said opposite walls of said container are in contact with corresponding opposite side walls of said rim portion of said container to further assist in the sealing engagement of said cover with said container.  
     
     
         6 . A combination as defined in  claim 1 , wherein said cover and said container are made of polyethylene.  
     
     
         7 . A combination as defined in  claim 1 , wherein said cover and said container are made of polypropylene.