Threaded cap

Abstract

A threaded cap is disclosed. The threaded cap may form a portion of a closure assembly comprising also comprising a threaded transition. The closure assembly may be utilized to seal a liquid containing bottle, particularly one containing a liquid fabric composition.

1 . A cap for a detergent container, said cap being described by a longitudinal center axis, said cap comprising:
 a. a closed cap top distally attached to a substantially circular cap opening via a cap wall having an inner cap wall surface and an outer cap wall surface, said outer cap wall surface having a circumference C o ;   b. a substantially circular cap membrane disposed on said outer cap wall surface; and   c. at least two thread structures disposed on said cap wall surface along said longitudinal center axis between said circular cap membrane and said opening, wherein each of said at least two external threads comprises:
 i. a discrete thread start disposed along said outer cap wall surface proximate to said cap opening; 
   ii. a thread lead angle of from about 4 to about 45 degrees; and   iii. a length less than one half of C o .   
     
     
         2 . The cap of  claim 1 , said cap having an Overflow Volume of less than about 85 ml. 
     
     
         3 . The cap of  claim 1 , wherein there is a distance along said longitudinal center axis of less than about 40 mm between said cap membrane and said closed cap top. 
     
     
         4 . The threaded closure assembly of  claim 3 , wherein there is a distance along said longitudinal center axis between said cap membrane and said closed cap top that is greater than about three or more times the distance between said substantially circular cap membrane and said substantially circular cap opening. 
     
     
         5 . The cap of  claim 1 , wherein at least one of said thread structures is continuous. 
     
     
         6 . The cap of  claim 1 , wherein at least one of said thread structures is discontinuous. 
     
     
         7 . The cap of  claim 1 , said cap comprising at least one dosing line. 
     
     
         8 . The cap of  claim 1 , comprising two external threads. 
     
     
         9 . The cap of  claim 8 , wherein each of said external threads are discontinuous. 
     
     
         10 . The cap of  claim 1 , comprising three external threads. 
     
     
         11 . The cap of  claim 10 , wherein each of said external threads are discontinuous. 
     
     
         12 . The cap of  claim 9 , said threads having a thread lead angle of from about 4.5 to about 15 degrees. 
     
     
         13 . The cap of  claim 11 , said threads having a thread lead angle of from about 4.5 to about 15 degrees. 
     
     
         14 . A cap for a detergent container, said cap being described by a longitudinal center axis, said cap comprising:
 a. a closed cap top distally attached to a substantially circular cap opening via a cap wall having an inner cap wall surface and an outer cap wall surface, said outer cap wall surface having a circumference C o ;   b. a substantially circular cap membrane disposed on said outer cap wall surface;   c. three external thread structures disposed on said outer cap wall surface along said longitudinal center axis between said circular cap membrane and said opening, wherein each of said at least two external threads comprises:
 i. a discrete thread start disposed along said outer cap wall surface proximate to said cap opening; 
   ii. a thread lead angle of from about 4 to about 15 degrees; and   iii. a length less than one half of C o ;   
       wherein there is a distance along said longitudinal center axis between said cap membrane and said closed cap top greater than about three or more times the distance between said substantially circular cap membrane and said substantially circular cap opening.