Bottle cap having a first cap member and a second cap member assembled thereto

Abstract

The bottle cap of the present invention consists of a first cap and a second cap fitted into the depressed portion of the first cap. The first cap includes a circumference portion formed so as to embrace the outer circumference of the neck of the bottle and a top edge portion formed on the top edge of said circumference portion so as to close the neck of the bottle. The top edge portion includes a depressed portion depressed downward so as to form a sidewall that comes into airtight contact with the inner circumference of the neck of the bottle. The second cap includes an insert portion inserted into the depressed portion and an elongated portion elongated outwardly from a top of the insert portion. Such a bottle cap provides an effect that sealability between the inside and outside of the neck of the bottle and the bottle cap can be improved.

1 . A bottle cap installed in the opening of a bottle, comprising:
 a first cap which includes a circumference portion formed in a cylindrical shape so as to embrace the outer circumference of a opening of a bottle, and a top edge portion having a depressed portion formed in downward recess so as to form a sidewall that comes into air-tight contact with the inner circumference of said opening of the bottle; and   a second cap which is fitted into said depressed portion of said first cap.   
   
   
       2 . The bottle cap of  claim 1 , wherein said first cap has a first catch portion formed in one part of an inner sidewall of said depressed portion, and said second cap has a second catch portion formed in one part of the outer circumference thereof to catch said first catch portion. 
   
   
       3 . The bottle cap of  claim 1 , wherein said second cap includes an elongated portion which is elongated outwardly from a top of said insert portion. 
   
   
       4 . The bottle cap of  claim 3 , wherein said insert portion is provided with a support formed therein to apply a lateral support force. 
   
   
       5 . The bottle cap of  claim 3 , wherein said elongated portion has a protrusion or slot for stripping formed on one part of the outer circumference. 
   
   
       6 . The bottle cap of  claim 3 , wherein said depressed portion of said first cap includes a stepped portion formed in stepped recess so that said elongated portion of said second cap is placed at the upper end of the inner sidewall. 
   
   
       7 . (canceled) 
   
   
       8 . The bottle cap of  claim 1 , wherein said depressed portion of said first cap has the thickness of said sidewall formed thinner than the other portions in the lower section of said sidewall. 
   
   
       9 . (canceled) 
   
   
       10 . The bottle cap of  claim 8 , wherein said sidewall of said depressed portion has its inside depressed, so that its thickness is formed thin. 
   
   
       11 . The bottle cap of  claim 1 , wherein said first cap includes a circular protrusion for breakaway prevention formed along the inner surface of said circumference portion. 
   
   
       12 . The bottle cap of  claim 1 , wherein said first cap includes a circular slot for breakaway prevention formed along the inner surface of said circumference portion. 
   
   
       13 . The bottle cap of  claim 1 , wherein said first cap includes a circular protrusion for sealing formed along the outer circumference of said sidewall. 
   
   
       14 . The bottle cap of  claim 1 , wherein a portion that connects the lower section of said depressed portion of said first cap and the bottom of thereof is curved. 
   
   
       15 . The bottle cap of  claim 14 , wherein one or more of concave shaped air passages, which connect the lower section of said depressed portion and the bottom thereof, is formed on the outer surface so that air in the bottle can be discharged when the bottle is opened. 
   
   
       16 . The bottle cap of  claim 15 , wherein each of said air passages has the width of passage formed wider in the lower section of said depressed portion than in the bottom section thereof. 
   
   
       17 . The bottle cap of  claim 14 , wherein said sidewall includes a skirt portion elongated downward to the bottom end outer circumference section. 
   
   
       18 . The bottle cap of  claim 1 , wherein the lower end of said circumference portion of said first cap is depressed so as to be formed thinner than the other portion of said circumference portion. 
   
   
       19 . The bottle cap of any one of  claims 1 , wherein said first cap further includes a plurality of tamper indication portions extended to the bottom end from the central portion of said circumference portion;
 a bended portion that connects the upper ends of said plurality of tamper indication portions in a line;   an opening piece portion that is defined by said plurality of tamper indication portions and said bended portion;   an opening knob that is protruded outward of the outer surface of said opening piece portion; and   a supporting protrusion that is protruded from a top of said bended portion so as to touch each other with the top edge of the opening knob of the opening piece portion when said opening piece portion is moved upward by the breaking of said tamper indication portions.   
   
   
       20 . The bottle cap of  claim 19 , wherein said tamper indication portions is formed of breaking lines of a dotted-line type or cutting lines with a thickness thinner than the other portions. 
   
   
       21 . The bottle cap of  claim 19 , wherein said circumference portion is cut in such a way that the bottom end portion is curved upward in the portion where said opening knob is formed. 
   
   
       22 . The bottle cap of  claim 19 , wherein one or a plurality of breaking lines of a dotted-line type or cutting lines with thickness thinner than the other portions are formed along the upward and downward directions of said circumference portion in the circumference portion on the opposite side of the portion where said opening knob is formed.