Practice golf ball

Abstract

A practice golf ball comprises a spherical member, a weight member, and a coating means. The spherical member is made of a paper and formed between about 1.5 inch and 2.5 inches in diameter. The coating means coats a spherical surface of the spherical member so that the coating means protects the spherical member against an external impact. For a better performance, the spherical member is made of corrugated paper. The corrugated paper spherical member has a plurality of parallel substantially cylindrical cavities. The plurality of parallel substantially cylindrical cavities can be formed by the plurality of wave forming sheets sandwiched between the plurality of layering sheets.

What is claimed is:  
     
         1 . A practice golf ball, comprising a spherical member made of a paper material, wherein the spherical member is between about 1.5 inch and 2.5 inches in diameter.  
     
     
         2 . The practice ball of  claim 1  further comprising a cover.  
     
     
         3 . The practice ball of  claim 2 , wherein the spherical member is made of corrugated paper having a plurality of parallel substantially cylindrical cavities.  
     
     
         4 . The practice ball of  claim 3 , further comprising a plurality of layering sheets and a plurality of wave forming sheets, wherein the plurality of parallel substantially cylindrical cavities are formed by the plurality of wave forming sheets sandwiched between the plurality of layering sheets.  
     
     
         5 . The practice ball of  claim 4 , wherein the plurality of wave forming sheets are shaped to form substantially sinusoidal waves.  
     
     
         6 . The practice ball of  claim 4 , wherein the plurality of wave forming sheets are shaped to form substantially square or rectangular waves.  
     
     
         7 . The practice ball of  claim 4 , wherein the plurality of wave forming sheets are shaped to form substantially triangular waves.  
     
     
         8 . The practice ball of  claim 3 , further comprising a plurality of layering sheets and a plurality of dividing sheets, wherein the plurality of parallel substantially cylindrical cavities are formed by the plurality of dividing sheets sandwiched between the plurality of layering sheets.  
     
     
         9 . The practice ball of  claim 8 , wherein the plurality of parallel substantially cylindrical cavities are shaped to form substantially square or rectangular waves.  
     
     
         10 . The practice ball of  claim 3 , wherein the plurality of parallel substantially cylindrical cavities are substantially hexagonal honeycomb in shape or substantially octagonal honeycomb in shape.  
     
     
         11 . The practice ball of  claim 2 , wherein the spherical member is made of an aerated paper having at least 20% air by volume of the spherical member.  
     
     
         12 . The practice ball of  claim 2 , wherein the spherical member is made of aerated paper having at least 50% air by volume of the spherical member.  
     
     
         13 . The practice ball of  claim 11 , wherein the aerated paper, wherein the aerated paper is made of solidified and aerated wood or paper pulp.  
     
     
         14 . The practice ball of  claim 12 , wherein the aerated paper, wherein the aerated paper is made of solidified and aerated wood or paper pulp.  
     
     
         15 . The practice ball of  claim 3 , wherein the cover comprises of a synthetic material.  
     
     
         16 . The practice ball of  claim 3 , wherein the cover comprises of a paint.  
     
     
         17 . The practice ball of  claim 5 , wherein the cover comprises of a synthetic material.  
     
     
         18 . The practice ball of  claim 5 , wherein the cover comprises of a paint.  
     
     
         19 . The practice ball of  claim 8 , wherein the cover comprises of a synthetic material.  
     
     
         20 . The practice ball of  claim 8 , wherein the cover comprises of a paint.