Heat isolation device for cup

Abstract

A heat isolation cup includes a paper-made cup which has a lip made of plastic material connected to the outer periphery of the open top of the cup. The lip includes a positioning portion. A bottom seals the underside of the cup and includes a positioning groove. A heat isolation part is mounted to outside of the cup and has a top end engaged with the positioning portion, and a bottom end engaged with the positioning groove so as to define a gap defined between the cup and the whole inside of the heat isolation part.

1 . A heat isolation cup comprising:
 a paper-made cup having a bottom sealing an underside of the cup, the cup having an open top and a lip made of plastic material being connected to an outer periphery of the open top of the cup, the lip having a positioning portion, and   a heat isolation part mounted to outside of the cup and having a top end thereof engaged with the positioning portion, a bottom end of the heat isolation part fixed to the outside of the cup, a gap defined between the cup and the heat isolation part.   
     
     
         2 . The heat isolation cup as claimed in  claim 1 , wherein the lip is made by way of injection molding and is integrally formed to the outer periphery of the open top of the cup. 
     
     
         3 . The heat isolation cup as claimed in  claim 1 , wherein the top end and the bottom end of the heat isolation part are glued to the cup. 
     
     
         4 . The heat isolation cup as claimed in  claim 1 , wherein the top end and the bottom end of the heat isolation part are connected to the cup by way of heat fusion. 
     
     
         5 . The heat isolation cup as claimed in  claim 1 , wherein the bottom end of the heat isolation part includes a protrusion which is folded inward toward the cup and the protrusion is connected to the cup. 
     
     
         6 . The heat isolation cup as claimed in  claim 1 , wherein the bottom end of the heat isolation part is fixed to the outside of the cup. 
     
     
         7 . The heat isolation cup as claimed in  claim 1 , wherein the lip is made by bio-degradable plastic material. 
     
     
         8 . The device as claimed in  claim 1 , wherein the bottom of the cup is made of plastic material which is integrally formed to the cup by way of injection molding, the bottom includes a positioning groove which is located corresponding to the positioning part, the bottom end of the isolation part is engaged with the positioning groove. 
     
     
         9 . The heat isolation cup as claimed in  claim 8 , wherein the bottom is made by bio-degradable plastic material.