Bottle and a corresponding bottle cap

Abstract

A bottle ( 1 ) comprising: a neck ( 4 ) comprising an opening ( 2 ), the opening having a circular cross-section; an inner volume for receiving a flowable, preferably a liquid, composition through the opening; wherein the neck ( 4 ) comprises an external thread ( 15 ), comprising a thread-start ( 8 ) and a thread-end ( 9 ), the thread-start ( 8 ) being arranged closer to the opening than the thread-end ( 9 ); and wherein the neck further comprises an external helical slope ( 10 ), comprising a slope-start ( 11 ) and a slope-end ( 12 ), the slope-start ( 11 ) being arranged closer to the opening than the slope-end ( 12 ); wherein the external thread and the helical slope have the same handedness; and wherein the thread-start ( 8 ) and the slope-end ( 11 ) have a common cylindrical axis and are radially aligned relative to the common cylindrical axis ( 12 ); and wherein the slope-end ( 12 ) preferably ends at a radial wall ( 13 ).

What is claimed is: 
     
         1 . A bottle ( 1 ) comprising:
 a neck ( 4 ) comprising an opening ( 2 ), the opening having a circular cross-section;   an inner volume for receiving a flowable, preferably a liquid, composition through the opening;   wherein the neck ( 4 ) comprises an external thread ( 15 ), comprising a thread-start ( 8 ) and a thread-end ( 9 ), the thread-start ( 8 ) being arranged closer to the opening than the thread-end ( 9 ); and   wherein the neck further comprises an external helical slope ( 10 ), comprising a slope-start ( 11 ) and a slope-end ( 12 ), the slope-start ( 11 ) being arranged closer to the opening than the slope-end ( 12 );   wherein the external thread and the helical slope have the same handedness; and   wherein the thread-start ( 8 ) and the slope-end ( 11 ) have a common cylindrical axis and are radially aligned relative to the common cylindrical axis ( 12 ); and   wherein the slope-end ( 12 ) ends at a radial wall ( 13 ).   
     
     
         2 . A bottle according to  claim 1 , wherein the slope ( 10 ) and thread ( 15 ) are arranged parallel in axial direction relative to the common axis. 
     
     
         3 . A bottle according to  claim 1 , wherein the neck ( 15 ) further comprises a stopper at a predefined angular position. 
     
     
         4 . A bottle according to  claim 1 , wherein the slope-end ( 12 ) and the slope-start ( 11 ) are radially aligned relative to the common axis ( 12 ) so that the radial wall ( 13 ) is a step ( 16 ) bridging the slope-end ( 11 ) to the slope-start ( 12 ). 
     
     
         5 . A bottle according to  claim 1 , wherein the thread-end ( 9 ) ends at a radial wall ( 14 ), so that when a suitable counter-thread is threaded over the thread ( 15 ), it stops when reaching the radial wall ( 14 ). 
     
     
         6 . A bottle according to  claim 1 , wherein the step ( 16 ) of  claim 4  is the stopper according to  claim 3 . 
     
     
         7 . A bottle according to  claim 6 , wherein the radial wall ( 14 ) is an auxiliary stopper, is aligned with the step ( 16 ) at the pre-defined angular position. 
     
     
         8 . A bottle according to  claim 1 , wherein major thread diameter of the thread ( 15 ) is smaller than the minor slope diameter 
     
     
         9 . An upper part suitable for a bottle according to  claim 1 , the upper part being able to close the opening, and comprising:
 a counter-thread ( 17 ) arranged to cooperate with the thread ( 15 );   a counter-slope ( 18 ) arranged to cooperate with the slope ( 10 );   the counter-thread ( 17 ) and the counter-slope ( 18 ) configured such that when unscrewing the upper part on the bottle, on at least one angular position, the counter-thread ( 17 ) contacts the thread ( 15 ) and the counter-slope ( 18 ) contact the slope ( 10 ) simultaneously;   
     
     
         10 . An upper part according to  claim 9 , wherein the counter-thread ( 17 ) and the counter-slope ( 18 ) have an angular length of at least 90°, so that, when unscrewing the upper part on the bottle, the simultaneous contact extends to an angular length of at least 90°. 
     
     
         11 . An upper part according to  claim 9 , wherein the counter-thread comprises a counter-radial-segment at its end configured to cooperate with the radial-wall ( 14 ) when screwed on the bottle. 
     
     
         12 . An upper part according to  claim 9 , wherein the counter-slope ( 17 ) comprises a counter-step, in axial direction, configured to cooperate with the step ( 16 ). 
     
     
         13 . An upper part according to  claim 9 , further comprising an annular contact surface, configured to seal a bottle, when the upper part is screwed to the bottle until at least one of the following conditions is satisfied:
 (i) the counter-stopper contacts the stopper;   (ii) the counter-radial-segment contacts the radial-wall ( 14 ).   
     
     
         14 . An upper part according to  claim 9 , wherein the bottle cap is configured to provide a tight seal for a composition to the bottle. 
     
     
         15 . An upper part according to  claim 9 , wherein the bottle cap is configured to provide a tight seal to the bottle for closing the inner volume of the bottle and thus configured to retain liquid inside when the bottle is filled.