Inner tube having a reinforced core member structure for ball sports

Abstract

An inner tube having paper strips, which are made of rayon fibers of natural pulp having a rayon structure and capable of being decomposed by biological agents when the ball is worn out, arranged into abutted parallel pairs and respectively bonded to the front side, back, top, bottom, left and right sides of the spherical rubber body thereof with latex adhesive evenly in multiple layers to reinforce the structural strength, assuring even distribution of wall thickness and enhancing ball durability.

What is claimed is: 
     
         1 . An inner tube for ball sports, comprising a spherical rubber body, four first paper strips arranged into two abutted parallel pairs and respectively bonded to front side and back side of said spherical rubber body with latex adhesive, four second paper strips arranged into two abutted parallel pairs and respectively bonded to top side and bottom side of said spherical rubber body with latex adhesive and respectively partially overlapped on opposing ends of said first paper strips, four third paper strips arranged into two abutted parallel pairs and respectively bonded to right side and left side of said spherical rubber body with latex adhesive and respectively partially overlapped on opposing ends of said second paper strips, four fourth paper strips arranged into two abutted parallel pairs and respectively bonded to the left side and right side of said spherical rubber body with latex adhesive and respectively perpendicularly extending over the two pairs of said third paper strips, four fifth paper strips arranged into two abutted parallel pairs and respectively bonded to the back side and front side of said spherical rubber body with latex adhesive, and four sixth paper strips arranged into two abutted parallel pairs and respectively bonded to the top side and bottom side of said spherical rubber body with latex adhesive.