Threaded cap element and method of manufacturing a cap element

Abstract

A threaded cap element and a method of manufacturing a cap element are disclosed. The threaded cap element may be formed in a thermoforming process. The threaded cap element may include a threaded portion with a thread, a flange portion, and a central lid portion that is opposite a cap element open region via which the threaded cap element is applied to a container to close off the container. The central lid portion may have a concavity in a direction of the open region.

1 . A threaded cap element, wherein the cap element is formed in a thermoforming process, the threaded cap element comprising a threaded portion with a thread, a flange portion, and a central lid portion that is opposite a cap element open region via which the threaded cap element is configured to be applied to a container to close off the container, wherein the central lid portion has a concavity in a direction of the open region. 
     
     
         2 . The cap element according to  claim 1 , wherein the concavity extends starting from the flange portion towards the open region. 
     
     
         3 . The cap element according to  claim 1 , wherein the flange portion has a diameter adapted to a corresponding portion of a container opening for a non-positive connection with the corresponding portion. 
     
     
         4 . The cap element according to  claim 1 , wherein the cap element includes an edge at an end of the cap element opposite the open region, wherein the edge is connected to the threaded portion at its external portion and transitions into the flange portion at an inner portion. 
     
     
         5 . The cap element according to  claim 4 , wherein the flange portion has a height of at least 2 mm starting from the edge. 
     
     
         6 . The cap element according to  claim 1 , wherein the flange portion has a channel. 
     
     
         7 . The cap element according to  claim 6 , wherein a decorative element is inserted into the channel. 
     
     
         8 . The cap element according to  claim 1 , wherein the concavity has a radius that depends on an inner diameter of a container opening of the container. 
     
     
         9 . The cap element according to  claim 8 , wherein the radius of the concavity corresponds to 1.2 to 1.8 times the inner diameter of the container opening. 
     
     
         10 . The cap element according to  claim 1 , wherein the cap element includes a further portion with a toothing. 
     
     
         11 . The cap element according to  claim 10 , wherein an inner diameter of the toothing is greater than an inner diameter of the threaded portion. 
     
     
         12 . The cap element according to  claim 1 , wherein the cap element includes a securing portion with a plurality of hook-like elements. 
     
     
         13 . The cap element according to  claim 12 , wherein the securing portion has a perforation. 
     
     
         14 . The cap element according to  claim 12 , wherein an inner diameter of the securing portion is greater than an inner diameter of the threaded portion. 
     
     
         15 . A method of forming a cap element, comprising the following steps:
 providing a plastics film;   heating the plastics film;   shaping the plastics film; and   demolding the shaped plastics film to form the cap element;   wherein the shaping is carried out using a mold tool that has a spindle that is moved out of a shaped region of the plastics film by rotation for the demolding.   
     
     
         16 . The method of  claim 15 , wherein the cap element includes a threaded portion with a thread, a flange portion, and a central lid portion that is opposite a cap element open region via which the cap element is configured to be applied to a container to close off the container, and wherein the central lid portion has a concavity in a direction of the open region.