Closure for a Container, Especially a Bottle

Abstract

The invention relates to a closure for a container, especially a bottle, comprising an upper covering panel and a circumferential collar adjoining the panel on the outside, wherein a scaling insert is arranged on the underside of the covering panel which has a circumferential profile seal on the outside. The upper covering panel has at least one partly circumferential embossing which interacts with the profile seal forming a valve.

1 . A closure for a bottle for carbonated beverages, which closure is constructed as crown-cork closure or tear-off closure,
 comprising an upper covering panel ( 1 ) made of metal and comprising a circumferential collar or skirt ( 2 ) adjoining the covering panel ( 1 ) on the outside,   wherein a sealing insert ( 5 ) is arranged on the underside of the covering panel ( 1 ), which has a circumferential profile seal ( 6 ) on the outside, characterised in that   the upper covering panel ( 1 ) has on its underside at least one embossing ( 12 ,  12   a ,  12   b ,  13 ,  13   a ,  13   b ), extending at least over a predefined angular region, which projects in the area of or close to the profile seal ( 6 ) and interacts therewith forming a valve.   
   
   
       2 . The closure according to  claim 1 , characterised in that the profile seal ( 6 ) is constructed as substantially L-shaped in cross-section with an outer first sealing ring ( 6   a ) and an inner second sealing ring ( 6   b ), wherein the outer sealing ring ( 6   a ) has a greater height and/or a smaller width than the inner sealing ring ( 6   b ). 
   
   
       3 . The closure according to  claim 1  or  claim 2 , characterised in that the or embossing is constructed as a circumferential step ( 12 ,  12   a ,  12   b ) with a side ( 14 ) which descends towards the centre (M) of the panel forming a, for example, pressed down cap central region ( 15 ). 
   
   
       4 . The closure according to  claim 3 , characterised in that the circumferential step has a plurality of step sections ( 12   a ,  12   b ) with different radii (R, R′) which each extends over a predetermined angular region (δ, δ′, δ″). 
   
   
       5 . The closure according to  claim 3  or  4 , characterised in that the (upper and/or lower) radius of the step ( 12 ) or at least of a step section ( 12   a ,  12   b ) is smaller than or equal to the outer radius (P a ) of the profile seal ( 6 ) and/or greater than or equal to the inner radius (P i ) of the profile seal ( 6 ). 
   
   
       6 . The closure according to anyone of the  claims 3  to  5 , characterised in that the (upper and/or lower) radius of the step ( 12 ) or at least one step section ( 12   a ,  12   b ) is (slightly) greater than the outer radius (P a ) of the profile seal ( 6 ) or (slightly) smaller than the inner radius (P i ) of the profile seal ( 6 ). 
   
   
       7 . The closure according to any one of  claims 3  to  6 , characterised in that the side angle (α) of the step ( 12 ,  12   a ,  12   b ) with respect to the horizontal is about 40° to 90°, e.g. 60° to 80°, or is about 5° to 40°, e.g. 10° to 15°. 
   
   
       8 . The closure according to  claim 1  or  claim 2 , characterised in that the embossing is constructed as a groove ( 13 ,  13   a ,  13   b ) formed in the upper covering panel of predetermined width (B) and height (H), with an outer side ( 16 ) descending towards the centre (M) of the cap and an inner side ( 17 ) ascending towards the centre (M) of the cap. 
   
   
       9 . The closure according to  claim 8 , characterised in that the groove ( 13 ) extends over the entire full angle as an annular groove ( 13 ). 
   
   
       10 . The closure according to  claim 8 , characterised in that a plurality of grooves or groove sections ( 13   a,b ) are provided which each extend over a predetermined angular section (δ, δ′, δ″). 
   
   
       11 . The closure according to  claim 10 , characterised in that all the grooves or groove sections ( 13   a,b ) have the same radius. 
   
   
       12 . The closure according to  claim 10 , characterised in that the grooves or groove sections ( 13   a,b ) have at least partly different radii. 
   
   
       13 . The closure according to any one of  claims 8  to  12 , characterised in that the outer radius (R a ) and/or inner radius (R i ) of the groove or at least one groove section is smaller than or equal to the outer radius (P a ) of the profile seal ( 6 ) and/or greater than or equal to the inner radius (P i ) of the profile seal ( 6 ). 
   
   
       14 . The closure according to any of  claims 8  to  13 , characterised in that the outer radius (R a ) and/or inner radius (R i ) of the groove or at least one groove section is (slightly) greater than the outer radius (P a ) of the profile seal ( 6 ) or (slightly) smaller than the inner radius (P i ) of the profile seal ( 6 ). 
   
   
       15 . The closure according to any one of  claims 8  to  14 , characterised in that the side angle (β) of the descending side ( 16 ) with respect to the horizontal and/or the side angle (γ) of the ascending side ( 17 ) with respect to the horizontal is about 40° to 90°, e.g. 60° to 80°. 
   
   
       16 . The closure according to any one of  claims 8  to  15 , characterised in that the side angle (β) of the descending side ( 16 ) with respect to the horizontal and/or the side angle (γ) of the ascending side ( 17 ) with respect to the horizontal is 5° to 40°, e.g. 10° to 15°. 
   
   
       17 . The closure according to any one of  claims 8  to  16 , characterised in that the width (B) of the groove is 1 mm to 5 mm, e.g. 1 mm to 3 mm. 
   
   
       18 . The closure according to any one of  claims 3  to  17 , characterised in that the height (H) of the groove or step is 0.1 mm to 0.8 mm, e.g. 0.2 mm to 0.6 mm. 
   
   
       19 . The closure according to any one of  claims 1  to  18 , characterised in that the shape, position, height and if appropriate the width of the groove(s) or step(s) are set depending on the profile seal such that the valve opens at a predetermined inner pressure of, for example, 6 bar to 10 bar and then closes again after the pressure has fallen by a predetermined difference of, for example 0.5 bar to 3 bar. 
   
   
       20 . The closure according to any of  claims 1  to  19 , characterised in that the bending radius (r) of the step is made to 0.2 to 1.5 mm, e.g. 0.3 mm to 1.0 mm, or that the bending radius (r) of the groove or groove section is made 0.2 mm to 1.0 mm, e.g. 0.3 mm to 0.8 mm.