Paper Drinking Straw

Abstract

A paper drinking straw is provided with an elongated member of paper having two short sides and two long sides wherein one long side includes a first joining strip and the other long side includes a second joining strip; a piercing segment at a position of the first joining strip superimposed on the second joining strip; and a cutting segment at one short side and including a first cutting edge connected to one long side, a second cutting edge connected to the first cutting edge and inward inclined relative to the first cutting edge, a third cutting edge connected to the second cutting edge and outward inclined relative to the first cutting edge, and a fourth cutting edge interconnected to the third cutting edge and the other long side. The first joining strip is superimposed on the second joining strip and secured thereto to form the paper drinking straw.

What is claimed is: 
     
         1 . A paper drinking straw, comprising:
 an elongated member of paper having two short sides and two long sides wherein one long side includes a first joining strip and the other long side includes a second joining strip;   a piercing segment formed at one short side of the member of paper and disposed at a position of the first joining strip superimposed on the second joining strip; and   a cutting segment formed at one short side of the member of paper and including a first cutting edge connected to one long side of the member of paper, a second cutting edge connected to the first cutting edge and inward inclined relative to the first cutting edge, a third cutting edge connected to the second cutting edge and outward inclined relative to the first cutting edge, and a fourth cutting edge interconnected to the third cutting edge and the other long side of the member of paper wherein the cutting segment is shaped an “M”, the second cutting edge extends at a first angle relative to one short side, the third cutting edge extends at the first angle relative to one short side, the first cutting edge is offset at a second angle from the second cutting edge, the fourth cutting edge is offset at the second angle from the third cutting edge, a value of the second angle is two times of that of the first angle, the first cutting edge is superimposed on the third cutting edge, and the fourth cutting edge is superimposed on the second cutting edge; and   wherein the first joining strip is superimposed on the second joining strip and secured thereto to form a thin, cylindrical paper drinking straw.   
     
     
         2 . The paper drinking straw of  claim 1 , further comprising a bellows segment including a plurality of parallel annular valleys and a plurality of parallel annular ridges each alternating with the valley, and wherein the bellows segment is located at a position about one third of the length of the long side proximate the other short side. 
     
     
         3 . The paper drinking straw of  claim 1 , wherein one surface of the member of paper is coated with a first waterproof membrane, an inner surface of the paper drinking straw is coated with the first waterproof membrane, the other surface of the member of paper opposing one surface thereof is coated with a second waterproof membrane, and the second waterproof membrane is coated on an outer surface of the paper drinking straw. 
     
     
         4 . The paper drinking straw of  claim 1 , further comprising a printing layer formed between the second waterproof membrane and the outer surface of the paper drinking straw, and wherein the printing layer includes a pattern, a color, a label or a combination thereof. 
     
     
         5 . The paper drinking straw of  claim 1 , wherein the first angle is 15 degrees to 75 degrees and the second angle is 30 degrees to 150 degrees. 
     
     
         6 . The paper drinking straw of  claim 1 , wherein both the first and second joining strips have the same width, and the width of either the first joining strip or the second joining strip is one sixth to one third of the width of the short side. 
     
     
         7 . The paper drinking straw of  claim 1 , wherein the member of paper is made of eatable paper or bio-degradable paper. 
     
     
         8 . The paper drinking straw of  claim 1 , wherein the member of paper has a thickness of 0.05 mm to 0.15 mm.