Integral heat-resisting structure of a disposable drinking cup

Abstract

The present invention discloses a heat-resisting disposable drinking cup comprising: a cup body made by a plastic injection molding and having a cup opening disposed at the top of the cup body and folded outward to form a cup lip; several tens of radial ribs integrally formed at the bottom of the cup lip of the cup opening, and the radial rib is extended more than 1.5 mm from the surface of the cup body but remained within the external periphery of the cup lip of the cup opening, and the interval between two adjacent radial ribs falls within a range of 3˜5 mm, and the height of each radial rib is less than 10 mm measured downward from the cup lip of the cup opening; such that radiating fins can be formed around the external periphery of the cup opening.

1 . An integral heat-resisting structure of a disposable drinking cup, comprising:
 a) a cup body, integrally formed by a plastic injection molding, and having a cup opening disposed at the top of the cup body, and folded outward to form a cup lip; and   b) a plurality of radial ribs, integrally formed at the bottom of the cup lip of the cup opening, and extended at least 1.5 mm out from the surface of the cup body but remained within the external periphery of the cup lip of the cup opening, and an interval between two adjacent radial ribs falling within a range of 3˜5 mm, and the height of the each radial rib being less than 10 mm measured downward from the cup lip of the cup opening;   
     whereby a plurality of radiating fins are formed around the external periphery of the cup opening. 
   
   
       2 . The integral heat-resisting structure of a disposable drinking cup as recited in  claim 1 , wherein the cup body and the radial ribs are made of a polypropylene (PP) material or a polyethylene (PE) material. 
   
   
       3 . The integral heat-resisting structure of a disposable drinking cup as recited in  claim 1 , wherein the radial rib has its upper edge connected to the bottom of the cup lip of the cup opening, and an edge tapered towards the cup body is formed at the bottom of the radial rib. 
   
   
       4 . The integral heat-resisting structure of a disposable drinking cup as recited in  claim 1 , wherein the cup body further comprises a circular groove disposed on a cup wall corresponding to the bottom of the cup lip of the cup opening.