Hinged closure moulded in closed position

Abstract

The invention is directed to a closure moulded in closed position. The closure comprises a body and a lid, which are separated by a circumferential gap. A snap hinged comprising two trapezoid elements, which are connected each by film hinges to the body and the lid, causes a snap action while opening or closing the closure. The closure offers opening angles in the range of 220°.

1 . Closure moulded in closed position with a body comprising fixing means to fix the closure on a neck (of a bottle, and a lid, comprising a sealing mean to seal an orifice of the bottle, whereby the body and the lid are separated to each other by a circumferential gap, and a snap hinge comprising a first and a second trapezoid element and a first and second pair of hinges each pair defining a first and a second plane, the first and the second pair of film hinges connecting the first and the second trapezoid element to the lid and to the body, whereby the first and the second plane are arranged substantially parallel to an axis A of the closure.  
   
   
       2 . Closure according to  claim 1  wherein the first and second pair of film hinges are arranged at an angle φ to each other, and the first and the second plane defined by the first and the second pair of film hinges are arranged at an angle  107  , the angle φ and an opening angle α of the closure is:  
     
       
         
           
             
               Φ 
               / 
               2 
             
             = 
             
               a 
               ⁢ 
               
                   
               
               ⁢ 
               
                 tan 
                 ⁡ 
                 
                   [ 
                   
                     
                       
                         sin 
                         ⁡ 
                         
                           ( 
                           α 
                           ) 
                         
                       
                       
                         1 
                         - 
                         
                           cos 
                           ⁡ 
                           
                             ( 
                             α 
                             ) 
                           
                         
                       
                     
                     ⁢ 
                     
                       sin 
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                         ( 
                         
                           ϖ 
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                         ) 
                       
                     
                   
                   ] 
                 
               
             
           
         
       
     
   
   
       3 . Closure according to  claim 1 , wherein the opening angle α is in the range of 180° and 240°.  
   
   
       4 . Closure according to  claim 1 , wherein the film hinges and the inner periphery of the closure are designed such that they do not protrude over a main inner radius (R 1 ) of the closure.  
   
   
       5 . Closure according to  claim 1 , wherein the film hinges are defined by a plane on the inside of the closure and the outside of the film hinges is defined by two flat boundary planes, arranged at an angle κ to each other, and a cylindrical boundary surface having a radius (R 3 ).  
   
   
       6 . Closure according to  claim 1 , wherein the trapezoid elements are spaced apart separated by a cutout.  
   
   
       7 . Closure according to  claim 1 , wherein the trapezoid elements are connected by a film hinge along a shorter edge.  
   
   
       8 . Closure according to  claim 1 , wherein the body and the lid are connected by tamper evidence means, which are destroyed by initial opening.  
   
   
       9 . Closure according to  claim 1 , wherein the body and the lid are in the open position spaced a distances s apart, whereby distance s is equal to 50% to 90% of the shorter edge of trapezoid elements.  
   
   
       10 . Closure according to  claim 1 , wherein said closure is characterized by a cylindrical outer wall section.