Method for the preparation of a drinking cup of board

Abstract

The invention relates to a method for manufacturing a disposable board drinking cup ( 10 ) and to the cup produced by the method. The cup is manufactured by folding a board blank between the cup mantle ( 5 ) and the collar ( 6 ), by bending and seaming the folded blank into a cone, the folding point forming the cup mouth ( 8 ), and by providing the thus seamed blank with a bottom. The cup thus formed comprises both a mantle ( 5 ) and a collar ( 6 ) bent downwardly from the cup mouth ( 8 ) and acting as a grip surface, making it easier to enjoy especially a hot drink from the cup. The shape of the cup mantle ( 5 ) and the collar ( 6 ) may be conically expanding, allowing the cups to be nested. The lower edge of the collar ( 6 ) can be equipped with a projection ( 12 ) for maintaining an air slot between the collar and the cup mantle.

1 . A method for manufacturing a board drinking cup ( 10 ), characterized by the steps of 
 providing a sheet-like cup blank ( 1 ) with parts for a conically expanding cup mantle ( 5 ) and a conically expanding collar ( 6 ), said areas being separated by a fold line ( 4 ),    folding the cup blank ( 1 ) along said fold line ( 4 ),    bending and seaming the folded cup blank ( 1 ) to produce an upwardly expanding cup mantle ( 5 ) turning at the cup mouth ( 8 ) to a downwardly expanding outer collar ( 6 ), the fold line ( 4 ) forming the cup mouth and the collar forming a grip surface outside the mantle, and    providing the cup with a sealed bottom ( 11 ).    
   
   
       2 . A method as defined in  claim 1 , characterized in that the collar ( 6 ) is formed as a ring encircling the cup ( 10 ) and covering at least part of its outer surface ( 5 ).  
   
   
       3 . A method as defined in  claim 1 , characterised in that an annular projection ( 12 ,  13 ) oriented inwardly towards the cup mantle ( 5 ) is formed at the lower edge of the collar ( 6 ).  
   
   
       4 . A method as defined in  claim 1 , characterised in that an annular enlargement ( 12 ) acting as reinforcement is formed at the lower edge of the collar ( 6 ).  
   
   
       5 . A method as defined in  claim 3 , characterised in that the enlargement ( 12 ) forms a projection oriented inwardly towards the cup mantle ( 5 ).  
   
   
       6 . A method as defined in  claim 4 , characterised in that the enlargement ( 12 ) forms a projection oriented outwardly from the collar ( 6 ).  
   
   
       7 . A method as defined in any of claims  4 - 6 , characterised in that the enlargement is a wind ( 12 ) or an overlay in the cup material.  
   
   
       8 . A method as defined in  claim 1 , characterised in that an annular enlargement ( 14 ) acting as reinforcement is formed at the mantle folding point in the cup mouth ( 8 ).  
   
   
       9 . A method as defined in  claim 1 , characterised in that the collar ( 6 ) has a height of 1 to 5 cm.  
   
   
       10 . A method as defined in  claim 1 , characterized in that the collar ( 6 ) height accounts for 20 to 100%, preferably 25 to 50% of the cup ( 10 ) height.  
   
   
       11 . A board drinking cup ( 10 ), which can be manufactured by a method defined in  claim 1 , characterized in that the cup ( 10 ) comprises an upwardly conically expanding cup mantle ( 5 ), folded at the cup mouth ( 8 ) to turn to a downwardly conically expanding collar ( 6 ), and a sealed bottom ( 11 ), the cup mantle and collar portions being nestable to allow piling of the cups and the collar forming a grip surface outside the mantle.