Beverage container cap body

Abstract

A beverage container cap body adapted to make it difficult to be easily unscrewed even though carbonated beverage is contained in a beverage container but make it easy to be smoothly opened even though there is a pressure from inside the beverage container, whereby packings are easily cleaned and the cap body can be equipped upright relative to the container, wherein the cap body comprises a cylindrical body, being releasably and threadably disposed to an inner circumferential wall of opening at a container body, and an upper area thereof protruding above the opening, a lower packing and an upper packing each tightly abutting on a lower side and an upper side of the inner circumferential wall of opening, a cut-out portion 9 h formed at an upper wall of an insertion groove, of the lower packing and a lid body releasably and threadably disposed at an upper side of the cylindrical body, wherein an opening is formed at part of a ceiling wall of the lid body while a seal member is disposed at an inner side of the ceiling wall for covering an entire area of opening of the cylindrical body and concurrently blocking the opening of the ceiling wall.

What is claimed is:  
     
         1 . A beverage container cap body, the cap body releasably and threadably disposed to an inner circumferential wall of opening at a container body, wherein the cap body is disposed with a lower packing tightly abutting on a lower inner circumferential wall of opening at the container body and is formed with a cutout part at an upper wall of an insertion groove for the lower packing.  
     
     
         2 . A beverage container cap body, the cap body releasably and threadably disposed to an inner circumferential wail of opening at a container body, wherein the cap body comprises a hollow body for opening a container body side and is of a closed structure at upper surface thereof.  
     
     
         3 . A beverage container cap body, the cap body releasably and threadably disposed to an inner circumferential wall of opening at a container body, wherein the cap body comprises a resilient seal member arranged to block the opening at part of ceiling wall at an inner side of the ceiling wall and to simultaneously cover the opening.  
     
     
         4 . A beverage container cap body, the cap body releasably and threadably disposed to an inner circumferential wall of opening at a container body, wherein the cap body comprises: 
 a lower packing for tightly abutting to a lower inner circumferential wall of opening at the container body; and    a tongue-shaped upper packing tightly abutting to an upper inner circumferential wall of opening at the container body.    
     
     
         5 . A beverage container cap body as defined in one of  claim 1  to  claim 4 , wherein the cap body comprises: 
 a cylindrical body releasably and threadably disposed at an inner circumferential wall of opening at the container body for protruding an upper part thereof above the opening of the container body; and  
 a lid body releasably and threadably disposed at an upper portion of the cylindrical body for opening and closing opening of the cylindrical body.