Insulation sleeve for a beverage cup

Abstract

An insulation sleeve for a beverage cup includes an outer sleeve layer formed from a looped sheet, and a foam layer coated on an inner surface of the outer sleeve layer. The outer sleeve layer has two opposite open ends and is tapered from one of the open ends to the other open end. The insulation sleeve can be manufactured easily as the foam layer is simply coated on the outer sleeve layer. The insulation sleeve provides a smoother surface for printing, thus obtaining a higher print quality.

1 . An insulation sleeve for a beverage cup having a surrounding wall, comprising:
 an outer sleeve layer formed as a looped sheet and adapted to be disposed around the surrounding wall of the beverage cup, said outer sleeve layer having two opposite open ends; and   a foam layer coated on an inner surface of said outer sleeve layer.   
     
     
         2 . The insulation sleeve as claimed in  claim 1 , wherein said outer sleeve layer further has a joint seam that extends from one of said open ends to the other one of said open ends of said outer sleeve layer, and is tapered from one of said open ends to the other one of said open ends. 
     
     
         3 . The insulation sleeve as claimed in  claim 1 , wherein said foam layer has a ring-shaped insulation member that extends angularly and continuously over said inner surface of said outer sleeve layer. 
     
     
         4 . The insulation sleeve as claimed in  claim 1 , wherein said foam layer has a plurality of insulation members that are spaced apart angularly and extend axially, and a plurality of gaps extending between said insulation members and terminating at said open ends of said outer sleeve layer. 
     
     
         5 . The insulation sleeve as claimed in  claim 1 , wherein said foam layer has a plurality of first insulation members that are spaced apart angularly and axially, a plurality of second insulation members that are spaced apart angularly and axially, and a plurality of gaps extending between said first and second insulation members, each of said first insulation members being staggered angularly with respect to an adjacent one of said first insulation members, said second insulation members alternating with said first insulation members near said open ends of said outer sleeve layer. 
     
     
         6 . The insulation sleeve as claimed in  claim 1 , further comprising a printed pattern layer formed on an outer surface of said outer sleeve layer. 
     
     
         7 . The insulation sleeve as claimed in  claim 6 , wherein said printed pattern layer has at least one pattern. 
     
     
         8 . The insulation sleeve as claimed in  claim 1 , wherein said foam layer has a plurality of insulation members that are spaced apart angularly and extend axially, a plurality of gaps extending between said insulation members and terminating at said open ends, and two opposite fold lines, each of which is formed in said outer sleeve layer between two adjacent ones of said insulation members. 
     
     
         9 . The insulation sleeve of  claim 1 , wherein said outer sleeve layer is made from a sheet material, and said foam layer is made from a foaming paste. 
     
     
         10 . The insulation sleeve of  claim 9 , wherein said foaming paste includes a polyurethane dispersion, and a foaming agent. 
     
     
         11 . A beverage cup comprising:
 a cup body having a bottom wall and a surrounding wall extending upward from said bottom wall; and   an insulation sleeve including an outer sleeve layer formed as a looped sheet and disposed around said surrounding wall of said cup body, and a foam layer coated on an inner surface of said outer sleeve layer, said outer sleeve layer having two opposite open ends and being tapered from one of said open ends to the other one of said open ends.   
     
     
         12 . The beverage cup as claimed in  claim 11 , wherein said outer sleeve layer further has a joint seam that extends from one of said open ends to the other one of said open ends of said outer sleeve layer. 
     
     
         13 . The beverage cup of  claim 12 , wherein said outer sleeve layer is made from a sheet material, and said foam layer is made from of a foaming paste. 
     
     
         14 . The beverage cup of  claim 13 , wherein said foaming paste includes a polyurethane dispersion and a foaming agent.