Lid for closing a liquid container

Abstract

The invention relates to a lid (1) for closing a liquid container (2). The lid (1) comprises a lid element (20) which has, on an inner side of the lid element, a lid thread (24) for a threaded connection with a container thread (2c) of a liquid container (2). A seal-retaining element (30) connected to the lid element (20) is provided. The seal-retaining element (30) has a projection (31) which extends in radial direction (R) outward from an outer circumference of the seal-retaining element (30). The projection (31) is arranged and configured such that an undercut (60) formed by the projection (31) is formed between the projection (31) and the lid element (20) for retaining a sealing element (40). A sealing element (40) is also provided, which is at least partially elastically deformable and has a retaining section (48) that extends in radial direction (R) inward. The sealing element (40) is positionable in a sealing position in which the sealing element (40) is arranged within the lid element (20) and the sealing element (40) is retained within the lid element (20) by the projection (31) of the seal-retaining element (30). The sealing element (40) is removable from the lid element (20) by elastic deformation of the sealing element (40).

1 . Lid for closing a liquid container, in particular a beverage bottle, preferably a water bottle, the lid comprising
 a lid element which has, on an inner side of the lid element, a lid thread for a threaded connection with a container thread of a liquid container, in particular a beverage bottle, preferably a water bottle,   a seal-retaining element that is connected to the lid element, wherein the seal-retaining element has a projection which extends in radial direction outward from an outer circumference of the seal-retaining element, wherein the projection is arranged and configured such that an undercut formed by the projection is formed between the projection and the lid element for retaining a sealing element, and   a sealing element which is at least partially elastically deformable and has a retaining section that extends in radial direction inward, wherein the sealing element is positionable in a sealing position in which the sealing element is arranged within the lid element and the sealing element is retained within the lid element by the projection of the seal-retaining element, wherein the sealing element is removable from the lid element by elastic deformation of the sealing element.   
     
     
         2 . Lid according to  claim 1 , comprising
 an outer lid element , wherein the lid element is arranged within the outer lid element and is connected to the outer lid element,   wherein preferably the outer lid element has an outer side of the outer lid element and an inner side of the outer lid element, and the lid element has an outer side of the lid element and an inner side of the lid element, and the outer side of the lid element is connected to the inner side of the outer lid element, preferably by a material-bonded connection, in particular by an adhesive connection.   
     
     
         3 . Lid according to  claim 1 , wherein the projection of the seal-retaining element is curved in radial direction outward along the outer circumference of the seal-retaining element, and/or
 wherein the retaining section of the sealing element is curved in radial direction inward, and/or   wherein the extension of the projection of the seal-retaining element in radial direction outward is such that the projection of the seal-retaining element at least partially overlaps the retaining section of the sealing element in radial direction outward.   
     
     
         4 . Lid according to  claims 1 ,
 wherein a distance is formed between the retaining section of the sealing element and the projection of the seal-retaining element in a direction orthogonal to the radial direction,   wherein the distance is preferably at least 0.25 mm, particularly preferably at least 0.5 mm, in particular at least 1 mm, and/or wherein the distance is preferably at most 5 mm, particularly preferably at most 2.5 mm, in particular at most 1.6 mm.   
     
     
         5 . Lid according to  claims 1 ,
 wherein the seal-retaining element is connected to the lid element in a material-bonded manner, preferably welded, in particular by microwave welding.   
     
     
         6 . Lid according to  claims 1 ,
 wherein the sealing element has an insertion contour on a top side of the sealing element and the lid element has a receiving contour on a side facing the sealing element, and wherein the insertion contour of the sealing element and the receiving contour of the lid element are designed to correspond to one another in such a way that the insertion contour of the sealing element is precisely insertable into the receiving contour of the lid element.   
     
     
         7 . Lid according to  claim 1 ,
 wherein the sealing element has a sealing surface on a bottom side of the sealing element for forming a seal with a container opening of a liquid container, in particular a beverage bottle, preferably a water bottle,   wherein the sealing surface preferably has a plurality of elevations and depressions which are preferably circular and/or concentric.   
     
     
         8 . Lid according to  claims 1   one of the preceding claims ,
 wherein the sealing element has a handle extending in the direction of a lid opening of the lid for pulling the sealing element out of the lid element,   wherein the handle of the sealing element preferably has a recess, preferably circular in shape, which is preferably arranged on a side of the handle facing a central axis of the lid.   
     
     
         9 . Lid according to  claims 1 ,
 wherein the lid element has a connecting section which has a recess, preferably arranged in a circular manner about a central axis of the lid, in particular in the form of a groove,   wherein the seal-retaining element has a connecting section corresponding to the connecting section of the lid element, and   wherein the connecting section of the lid element is connected in a material-bonded manner to the connecting section of the seal-retaining element,   wherein preferably the connecting section of the seal-retaining element is connected in a material-bonded manner to the connecting section of the lid element on both sides of the recess of the connecting section of the lid element.   
     
     
         10 . Lid according to  claim 1 ,
 wherein the sealing element has a cover section which completely covers the seal-retaining element in the direction of the lid opening, and/or   wherein the seal-retaining element has a cylindrical insertion section and the lid element has a cylindrical receiving section, wherein the insertion section of the seal-retaining element is inserted precisely into the receiving section of the lid element.   
     
     
         11 . Lid according to  claim 1 ,
 wherein the lid element comprises or consists of plastic, preferably in the form of a thermoplastic, in particular polypropylene, and/or   wherein the seal-retaining element comprises or consists of plastic, preferably in the form of a thermoplastic, in particular polypropylene, and/or   wherein the sealing element comprises or consists of elastomer, preferably in the form of silicone, in particular in the form of food-safe silicone, and/or   wherein the outer lid element comprises or consists of metal, preferably in the form of steel, in particular stainless steel.   
     
     
         12 . Lid according to  claim 1 ,
 wherein the sealing element has a Shore A hardness of at least 25 Shore A  3   s,  preferably at least 35 Shore A  3   s,  particularly preferably at least 45 Shore A  3   s,  and/or wherein the sealing element has a Shore A hardness of at most 75 Shore A  3   s,  preferably at most 65 Shore A  3   s,  particularly preferably at most 55 Shore A  3   s,  and/or wherein the sealing element has a Shore A hardness of 50 Shore A  3   s.      
     
     
         13 . Lid according to  claim 1 ,
 wherein the lid has two handle retaining elements and wherein the outer lid element has two holes for receiving the handle retaining elements, wherein the handle retaining elements each having an outer connecting section and an inner connecting section, wherein preferably the outer connecting section of the handle retaining element is arranged in the region of the outer side of the outer lid element and the inner connecting section of the handle retaining element is arranged in the region of the inner side of the outer lid element.   
     
     
         14 . Lid according to  claim 1 ,
 wherein the lid has a handle which has a first end and a second end, wherein at the first end of the handle a hole is provided for establishing a form-fitting, preferably detachable, connection, in particular a snap connection, with one of the handle retaining elements, and wherein at the second end of the handle a hole is provided for establishing a form-fitting, preferably detachable, connection, in particular a snap connection, with one of the handle retaining elements,   wherein preferably an undercut is formed on each of the handle retaining elements between the inner connecting section and the outer connecting section and each outer connecting section of the handle retaining element has an outer diameter which is at least 1 mm, preferably at least 2 mm, greater than the inner diameter of the hole at the first end of the handle and/or the hole at the second end of the handle and at most 6 mm, preferably at most 4 mm, smaller than the inner diameter of the hole at the first end of the handle and/or the hole at the second end of the handle.   
     
     
         15 . Lid according to  claim 1 ,
 wherein the lid element has a recess for each of the handle retaining elements for connection to the inner connecting section ( 4   b ) of the respective handle retaining element,   wherein preferably each of the recesses for connection to the inner connecting section of the respective handle retaining element has a surface curved in the circumferential direction of the lid element, and the inner connecting section of the respective handle retaining element has a curved contact surface corresponding to this curved surface.   
     
     
         16 . Liquid container, preferably in the form of a beverage bottle, in particular in the form of a water bottle, comprising:
 a container body, in particular in the form of a bottle body, for receiving liquids, in particular water, wherein the container body has a container opening and a container thread, and   a lid according to  claim 1 , wherein the lid thread of the lid is configured to engage in the container thread of the container body and to form a detachable threaded connection between the lid and the container body.   
     
     
         17 . Method for manufacturing a lid, preferably a lid according to  claim 1 , the method ( 100 ) comprising:
 manufacturing, in particular by injection molding, a lid element, which preferably comprises or consists of polypropylene, and which has, on an inner side of the lid element, a lid thread for a threaded connection with a container thread of a liquid container, in particular a beverage bottle, preferably a water bottle;   manufacturing, in particular by injection molding, a seal-retaining element, which preferably comprises or consists of polypropylene, wherein the seal-retaining element has a projection which extends in radial direction outward from an outer circumference of the seal-retaining element;   material-bonded joining of the seal-retaining element to the lid element;   inserting a sealing element, which is at least partially elastically deformable, into a sealing position such that the sealing element is arranged within the lid element and is retained within the lid element by the projection of the seal-retaining element.   
     
     
         18 . Method according to  claim 17 , the method comprising:
 manufacturing an outer lid element, preferably made of steel, in particular stainless steel; and/or   material-bonded joining of the lid element to an outer lid element by arranging the lid element within the outer lid element and arranging an adhesive bond between the lid element and the outer lid element.   
     
     
         19 . Method according to  claim 17 ,
 wherein the material-bonded joining of the seal-retaining element to the lid element is effected by microwave welding, in particular by applying microwaves with
 an energy of at least 100 watts, preferably at least 200 watts, and/or of at most 500 watts, preferably at most 400 watts, and/or 
 a frequency of at least 5 kHz, preferably at least 10 kHz, and/or of at most 30 kHz, preferably at most 20 kHz, and/or 
 a time of at least 0.05 seconds, preferably at least 0.10 seconds, and/or at most 0.30 seconds, preferably at most 0.20 seconds. 
   
     
     
         20 . Method according to  claim 17 , the method ( 100 ) comprising:
 positioning two handle retaining elements in holes of the outer lid element, wherein the handle retaining elements each have an outer connecting section and an inner connecting section, wherein preferably the outer connecting section of the handle retaining element is arranged in the region of the outer side of the outer lid element and the inner connecting section of the handle retaining element is arranged in the region of the inner side of the outer lid element; and/or   inserting the lid element into the outer lid element, wherein the lid element has, for each of the handle retaining elements, a recess for connection to the inner connecting section of the respective handle retaining element, and the recesses receive the inner connecting section of the respective handle retaining element; and/or   forming a form-fitting, preferably detachable, connection, in particular a snap connection, between a hole at a first end of a handle and one of the handle retaining elements and a form-fitting, preferably detachable, connection, in particular a snap connection, between a hole at a second end of the handle and one of the handle retaining elements.