Removable sealing device for use to seal a liquid container

Abstract

A removable sealing device is adapted to be mounted on a neck member of a liquid container to seal an outlet thereof. The device includes a seal membrane with a peripheral sealing surface which overlies a surrounding sealing edge surface formed with an edge wall of the neck member to close the outlet and which includes first and second sealing areas that are provided with first and second bonding members respectively with first and second bonding strengths. When the neck member is inverted to subject the seal membrane to the load of the liquid mass while the container is squeezed, the bonding between the second sealing area and the surrounding sealing edge surface remains, whereas the bonding between the first sealing area and the surrounding sealing edge surface is broken.

I claim:  
     
         1 . A removable sealing device for sealing a liquid container which includes a vessel body formed from a squeezable material and defining an accommodation chamber therein to receive liquid, and a neck member defining a neck passage and integrally formed with the vessel body at a surrounding juncture to have the neck passage in fluid communication with the accommodation chamber, the neck member extending from the surrounding juncture in an upright direction and terminating at a surrounding edge wall which confines an outlet that is communicated with the neck passage, said removable sealing device comprising: 
 a surrounding sealing edge surface adapted to be formed with the surrounding edge wall, and opposite to the juncture in the upright direction;    a seal membrane formed from a material which does not rupture when the neck member is inverted to subject said seal membrane to the load of the liquid mass while the vessel body is squeezed, said seal membrane having a peripheral sealing surface which overlies said surrounding sealing edge surface to close the outlet and to form a surrounding peripheral line, said peripheral sealing surface including first and second sealing areas which are angularly displaced from each other along said surrounding peripheral line; and    first and second bonding members respectively disposed between said surrounding sealing edge surface, and said first and second sealing areas respectively, thereby binding them with first and second bonding strengths respectively such that when the neck member is inverted to subject said seal membrane to the load of the liquid mass while the vessel body is squeezed, the bonding between said second sealing area and said surrounding sealing edge surface remains, whereas the bonding between said first sealing area and said surrounding sealing edge surface is broken.    
     
     
         2 . The removable sealing device of  claim 1 , wherein said first sealing area has a surface area which is larger than that of said second sealing area.  
     
     
         3 . The removable sealing device of  claim 1 , wherein said first and second bonding members are first and second adhesives respectively, said first bonding strength of said first adhesive being smaller than said second bonding strength of said second adhesive.  
     
     
         4 . The removable sealing device of  claim 1 , wherein said second bonding member is heat sealable.  
     
     
         5 . The removable sealing device of  claim 1 , wherein said second bonding member is high-frequency sealable.  
     
     
         6 . The removable sealing device of  claim 1 , wherein said seal membrane is formed from a plastic material.  
     
     
         7 . The removable sealing device of  claim 1 , wherein said seal membrane is formed from a metal material.  
     
     
         8 . A liquid container comprising: 
 a vessel body formed from a squeezable material and defining an accommodation chamber therein to receive a liquid;    a neck member defining a neck passage, and integrally formed with said vessel body at a surrounding juncture to have said neck passage in fluid communication with said accommodation chamber, said neck member extending from said surrounding juncture in an upright direction and terminating at a surrounding edge wall which confines an outlet that is communicated with said neck passage; and    a removable sealing device including 
 a surrounding sealing edge surface formed with said surrounding edge wall, and opposite to said juncture in the upright direction,  
 a seal membrane formed from a material which does not rupture when said neck member is inverted to subject said seal membrane to the load of the liquid mass while said vessel body is squeezed, said seal membrane having a peripheral sealing surface which overlies said surrounding sealing edge surface to close said outlet and to form a surrounding peripheral line, said peripheral sealing surface including first and second sealing areas which are angularly displaced from each other along said surrounding peripheral line, and  
   first and second bonding members respectively disposed between said surrounding sealing edge surface, and said first and second sealing areas respectively, thereby binding them with first and second bonding strengths respectively such that when said neck member is inverted to subject said seal membrane to the load of the liquid mass while said vessel body is squeezed, the bonding between said second sealing area and said surrounding sealing edge surface remains, whereas the bonding between said first sealing area and said surrounding sealing edge surface is broken.    
     
     
         9 . The liquid container of  claim 8 , wherein said vessel body is formed from a plastic material.  
     
     
         10 . The liquid container of  claim 8 , wherein said vessel body is formed from a metal material.  
     
     
         11 . The liquid container of  claim 8 , further comprising a cap member disposed to cover said removable sealing device and said neck member in the upright direction.  
     
     
         12 . The liquid container of  claim 11 , wherein said cap member and said neck member are in threaded engagement.