Heat isolation collar for paper cup

Abstract

A paper cup assembly includes a paper cup 10 with a bottom piece connected to the lower end thereof and the cup has an open top. A lip portion made of bio-degradable plastic material is formed along the open top by way of injection molding, heat-pressing or high-frequency wave welding. Multiple protrusions are formed on the outside of the cup when forming the lip portion. The cup has a positioning portion and the isolation collar is mounted to the cup and the top portion of the isolation collar is connected to the positioning portion. The lower portion of the isolation collar is fixed to the cup. A gap is defined between the whole isolation collar and the cup. When used to a deep cup, the protrusions are helpful for isolating the heat from the cup.

1 . A paper cup assembly comprising:
 a paper cup with a bottom piece connected to a lower end thereof and the cup having an open top, a lip portion made of plastic material formed along the open top, multiple protrusions formed on an outside of the cup when forming the lip portion.   
     
     
         2 . The assembly as claimed in  claim 1 , wherein the cup having a positioning portion defined in an underside of the lip portion, an isolation collar is mounted to the cup and a top portion of the isolation collar is connected to the positioning portion. 
     
     
         3 . The assembly as claimed in  claim 2 , wherein a lower portion of the isolation collar is fixed to the outside of the cup. 
     
     
         4 . The assembly as claimed in  claim 1 , wherein the lip portion is made by way of injection molding. 
     
     
         5 . The assembly as claimed in  claim 1 , wherein the lip portion is made by bio-degradable plastic material. 
     
     
         6 . The assembly as claimed in  claim 1 , wherein the lip portion is made by bio plastic. 
     
     
         7 . The assembly as claimed in  claim 1 , wherein a lower portion of the isolation collar is folded inward so as to be fixed to the outside of the cup. 
     
     
         8 . The assembly as claimed in  claim 1 , wherein the bottom piece is made by plastic material and is integrally formed with the cup by way of injection molding, the bottom piece has a positioning groove and the lower portion of the isolation collar is engaged with the positioning groove. 
     
     
         9 . The assembly as claimed in  claim 8 , wherein the bottom piece is made by bio-degradable plastic material. 
     
     
         10 . The assembly as claimed in  claim 9 , wherein the bottom piece is made by bio plastic.