Display packaging

Abstract

The disclosure describes a method of manufacturing a display package ( 4 ) involving attaching thermoplastically coated cardboard sheets ( 5,6 ) together by fusing regions of the thermoplastic coating ( 8,9 ) together by high frequency welding. A container incorporating a mounting flange is also fused to the thermoplastic layers ( 8,9 ) by high frequency welding. There is no distinct adhesive between the polyethylene coated cardboard backing sheets.

1 . A method of manufacturing a display package comprising:
 providing a first cardboard element which has a first region that is coated with a first layer of polyethylene;   providing a second cardboard element which has a second region that is coated with a second layer of polyethylene;   positioning the first and second cardboard elements such that the first and second coated regions at least partly overlap; and   attaching the first cardboard element to the second cardboard element by radio frequency (RF) welding at least part of the first and second overlapping coated regions such that the first and second coated regions at least partly fuse together.   
   
   
       2 . The method according to  claim 1 , wherein information is printed on the first cardboard element. 
   
   
       3 . The method according to  claim 1 , wherein information is printed on the second cardboard element. 
   
   
       4 . The method according to  claim 1 , wherein the method further comprises:
 providing a third element; and   positioning the third element between the first and second cardboard elements such that the third element is at least partly trapped between the first and second cardboard elements when the first and second cardboard elements are attached to one another.   
   
   
       5 . The method according to  claim 4 , wherein the third element is of cardboard. 
   
   
       6 . The method according to  claim 1 , wherein the first and second cardboard elements are each generally planar sheets, with one side of each of the sheets being substantially entirely coated with the layer of polyethylene. 
   
   
       7 . The method according to  claim 1 , wherein the method further comprises:
 providing an open ended thermoplastic container which incorporates a mounting flange;   placing a product into the container;   positioning the mounting flange at least partly between the overlapping coated regions of the first and second cardboard elements; and   attaching the container to the cardboard elements by radio frequency (RF) welding at least part of the mounting flange to the coated regions such that the coated regions and the mounting flange at least partly fuse together.   
   
   
       8 . The method according to  claim 7 , wherein the method further comprises:
 inserting part of the container through an aperture in the second cardboard element and positioning the mounting flange so as to overlap part of the coated region of the second cardboard element; and   positioning the first cardboard element to close the open end of the container such that the container is sealed when the first cardboard element is attached to the second cardboard element.   
   
   
       9 . The method according to  claim 1 , wherein the first and second cardboard elements are each coated on one side by a layer of polyethylene and the first and second cardboard elements are pre-formed for registration with one another to provide an effective bond between the first and second cardboard elements. 
   
   
       10 . A display package comprising:
 a first cardboard element which has a region that is coated with a layer of polyethylene to form a first integral backing sheet; and   a second cardboard element which has a region that is coated with a layer of polyethylene to form a second integral backing sheet;   the first and second cardboard backing sheets being attached to one another by at least part of the coated region of the first cardboard element which is at least partly fused to at least part of the coated region of the second cardboard element, wherein no adhesive is present in any bond between the backing sheets.   
   
   
       11 . The display package according to  claim 10 , wherein information is printed on the first cardboard element. 
   
   
       12 . The display package according to  claim 10 , wherein information is printed on the second cardboard element. 
   
   
       13 . The display package according to  claim 10 , wherein the display package incorporates a thermoplastic container which is at least partly fused to the coated layer of the first cardboard element and the coated layer of the second cardboard element. 
   
   
       14 . A display package according to  claim 10 , wherein the first and second cardboard elements each have a polyethylene coating on one side to provide an effective bond between the first and second cardboard elements. 
   
   
       15 . A display package according to  claim 10 , wherein the first and second cardboard elements are pre-formed for registration with one another.