Double-walled cup

Abstract

The invention relates to a double-walled cup ( 1 ) which comprises an inner and an outer wall as well as a cup opening on its upper end and a bottom part on its lower end. The outer wall is substantially produced from paper, cardboard or the like. The object of the invention is to improve said double-walled cup ( 1 ) in such a manner that it can be more rapidly and simply produced and assembled and to reduce the structural stability of the double-walled cup while maintaining its corresponding thermal insulating properties. For this purpose, the inner cup providing the inner wall is inserted into the outer cup ( 3 ) providing the outer wall and is secured therein or thereto in an especially detachable manner. The inner cup ( 2 ) is produced from an at least fluid-tight plastic material.

1 . A double-wall cup comprising:
 an inner and outer wall,   an upper cup opening and a lower cup bottom,   at least the outer wall is essentially formed from paper or cardboard,   the inner wall is formed by an inner cup, which is inserted into an outer cup providing the outer wall,   the inner cup being in particular detachably attached in the outer cup, and the inner cup is formed from an at least fluid-tight plastic material,   the inner cup has a flange that at least partially surrounds its upper inner cup opening and protrudes radially outward as a flat edge flange to contact a shoulder that protrudes from an inner side of the outer cup at least in places.   
     
     
         2 . The double-wall cup according to  claim 1 , wherein the outer cup is covered inside and/or outside with a plastic film. 
     
     
         3 . The double-wall cup according to  claim 1 , wherein the outer cup has an outer edge flange which protrudes outwards and at least partially surrounds an upper outer cup opening. 
     
     
         4 . The double-wall cup according to  claim 3 , wherein the outer edge flange is formed as a beaded rolled rim. 
     
     
         5 - 12 . (canceled) 
     
     
         13 . The double-wall cup according to  claim 1 , wherein the shoulder or has a depth which is less than the length of the flat edge flange. 
     
     
         14 . The double-wall cup according to  claim 1 , wherein the flat edge flange is rounded off at its free end. 
     
     
         15 . The double-wall cup according to  claim 1 , wherein a wall section of the outer cup extends from the shoulder essentially vertically upwards to an outer edge flange. 
     
     
         16 . The double-wall cup according to  claim 1 , wherein the inner cup terminates with its lower end spaced from a lower end of the outer cup, forming an accommodation space between these ends. 
     
     
         17 . The double-wall cup according to  claim 1 , wherein an air chamber running in the circumferential direction, is formed between at least the inner cup wall and the outer cup wall. 
     
     
         18 . The double-wall cup according to  claim 1 , wherein the inner cup wall and outer cup wall extend conically upwards. 
     
     
         19 . The double-wall cup according to  claim 18 , wherein the cone angles of the inner cup wall and outer cup wall are equal. 
     
     
         20 . The double-wall cup according to  claim 18 , wherein the cone angles of the inner cup wall and outer cup wall are different. 
     
     
         21 . (canceled) 
     
     
         22 . The double-wall cup according to  claim 1 , wherein the inner cup is formed from a gas-tight plastic material. 
     
     
         23 . The double-wall cup according to  claim 1 , wherein a sealing foil or a lid for sealing the inside of the cup is detachably attached to inner or outer edge flanges. 
     
     
         24 . The double-wall cup according to  claim 1 , wherein the cross-sections of the inner and outer cups geometrically similar to one another. 
     
     
         25 . The double-wall cup according to  claim 1 , wherein the inner cup stands with its lower end on a bottom part of the outer cup at least in places. 
     
     
         26 . The double-wall cup according to  claim 1 , wherein the inner cup is manufactured from polypropylene, polystyrene, polyester, polyethylene, a combination of these materials or the like. 
     
     
         27 . The double-wall cup according to  claim 1 , wherein a connection between the inner cup and the outer cup is formed by means of the plastic film of, for example, polyethylene which is in particular applied on the inside of the outer cup. 
     
     
         28 . The double-wall cup according to  claim 1 , wherein a lower cup section of the outer cup is detachable from the upper cup section without physically compromising the inner cup to provide access to the accommodation space. 
     
     
         29 . The double-wall cup according to  claim 28 , wherein a tear-off strip or a tear-off line is formed between the lower and upper cup sections. 
     
     
         30 . The double-wall cup according to  claim 29 , wherein a tear-off tab is joined to the tear-off strip or to the tear-off line. 
     
     
         31 . The double-wall cup according to  claim 1 , wherein the inner cup and outer cup are joined together by an adhesive and/or by mechanical interaction. 
     
     
         32 . A double-wall cup comprising:
 an inner and outer wall,   an upper cup opening and a lower cup bottom,   at least the outer wall is essentially formed from paper or cardboard,   the inner wall is formed by an inner cup, which is inserted into an outer cup providing the outer wall,   the inner cup being detachably attached in the outer cup and formed from an at least fluid-tight plastic material,   the inner cup has an inner edge flange that at least partially surrounds its upper inner cup opening and protrudes radially outward as a flat edge flange with its free end inserted into a groove which runs around the inner side of the outer cup.   
     
     
         33 . The double-wall cup of  claim 32  wherein the groove has a depth which is less than a length of the flat edge flange.