Lid having a break line

Abstract

The invention relates to a lid comprising a tubular skirt including a non-removable portion permanently retained about a container neck and a removable portion attached removably to the neck, said non-removable and removable skirt portions being connected by a break line suitable for breaking the first time the lid is opened.

1 . A lid for a container neck,
 including a tubular skirt capable of surrounding the neck and provided both with a peripheral break line, which is adapted to be broken during the first opening of the lid and which, before this first opening, connects along the direction of the axis of the skirt, a non-removable portion of the skirt, provided with means for permanently retaining around the neck, and a removable portion of the skirt, provided with means for removable attachment to the neck, and at least one break segment, which is delimited distinctly from the break line so as to form, between the break line and the break segment along the direction of the axis of the skirt, a strand extending along the periphery of the skirt,   wherein either each of both peripheral ends, or the running portion of said strand, is bound in a non-breakable way to a first of the removable and non-removable skirt portions, while, respectively either the running portion, or each of both peripheral ends of said strand is connected to the second of the skirt portions through a breakable bridge which is adapted, during the first opening of the lid, for successively resisting to failure while the break line is already broken, and for then breaking after plastic deformation of the strand and for thus separating the removable and non-removable skirt portions from each other.   
     
     
         2 . The lid according to  claim 1 , wherein the breakable bridge is further adapted for reinforcing the resistance to failure of the break line during handlings of the lid before its first opening, notably during its placement around the container neck. 
     
     
         3 . The lid according to  claim 1 , wherein each of both peripheral ends of the break segment is located, along the periphery of the skirt, outside the peripheral portion of the skirt, in which the running portion of the strand is either breakably connected to the second of the removable and non-removable skirt portions, or non-breakably connected to the first of the removable and non-removable skirt portions. 
     
     
         4 . The lid according to  claim 3 , wherein the peripheral extent of the peripheral portion of the skirt, in which the running portion of the strand is either breakably bound to the second of the removable and non-removable skirt portions, or non-breakably bound to the first of the removable and non-removable skirt portions, has the value of at least 80% of the peripheral extent of the break segment. 
     
     
         5 . The lid according to  claim 1 , wherein, in the case when the breakable bridge is provided between the running portion of the strand and the second of the removable and non-removable skirt portions, the breakable bridge is located, along the periphery of the skirt, closer to one of both peripheral ends of the break segment than to the other peripheral end. 
     
     
         6 . The lid according to  claim 1 , wherein, in the case when the breakable bridge is provided between the running portion of the strand and the second of the removable and non-removable skirt portions, the breakable bridge is located, along the periphery of the skirt, substantially in the middle of the break segment. 
     
     
         7 . The lid according to  claim 1 , wherein, in the case when the breakable bridge is provided between the running portion of the strand and the second of the removable and non-removable skirt portions, the breakable bridge is located at the same axial level as the break line. 
     
     
         8 . The lid according to  claim 1 , wherein the break line includes breakable small bridges, which are distributed along the periphery of the skirt, which, after the first opening of the lid, connect the removable and non-removable skirt portions to each other, and which, during the first opening of the lid, are adapted to be all broken before the breaking of the breakable bridge. 
     
     
         9 . The lid according to  claim 8 , wherein the means for removable attachment to the neck comprise a threading for screwing-unscrewing around this neck, and in that when this threading is screwed on for the first time, for placement of the lid and unscrewed for the first opening of the lid, around the neck, the breakable bridge is designed to essentially operate in traction-compression while the breakable small bridges are designed so as to essentially operate with shearing. 
     
     
         10 . The lid according to  claim 1 , wherein several break segments which are distributed along the periphery of the skirt. 
     
     
         11 . The lid according to  claim 1 , wherein said at least one break segment is delimited in the removable skirt portion. 
     
     
         12 . The lid according to  claim 1 , wherein said at least one break segment is delimited in the non-removable skirt portion. 
     
     
         13 . The lid according to  claim 1 , wherein said at least one break segment extends rectilinearly along the periphery of the skirt. 
     
     
         14 . The lid according to  claim 1 , wherein said at least one break segment forms, along the periphery of the skirt a V pattern pointing towards the break line. 
     
     
         15 . The lid according to  claim 1 , wherein the break segment is curved along the periphery of the skirt, while being convex towards the break line.