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.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a ball structure for ball sports and more particularly, to an inner tube having a reinforced core member structure for a ball for ball sports, which has high durability and provides evenly distributed elasticity.[0003]2. Description of the Related Art[0004]To enhance durability, the inner tube for soccer ball or volleyball may be provided with a reinforced surface structure. As shown in FIGS. 1˜11, the inner tube A comprises 8 pcs of first nonwoven fabric strips 1˜8 arranged in four crossed pairs 1,2; 3,4; 5,6; 7,8 and respectively bonded to the front side (see FIG. 1), back side (see FIG. 2), top side (see FIG. 3) and bottom side (see FIG. 4) of the spherical rubber body thereof, 4 pcs of second nonwoven fabric strips (see arranged into two crossed pairs 9,10; 11, 12 and respectively bonded to the left side (see FIG. 5) and right side (see FIG. 6) over respective ends of the 8 pcs of fi...

AI Technical Summary

Benefits of technology

The present invention is a reinforced core member structure for a ball used in ball sports that is designed to have high durability, evenly distributed elasticity, and be environmentally friendly. It consists of an inner tube made of paper strips arranged into abutted parallel pairs and bonded to the front side, back, top, bottom, left, and right sides of the spherical rubber body of the ball with latex adhesive in multiple layers. The paper strips are made of natural pulp fibers that are decomposed by biological agents when the ball is worn out, making the invention environmentally friendly. Overall, this design provides a strong and durable ball with evenly distributed elasticity for improved performance and safety during training and games.

Problems solved by technology

This design of core member structure has drawbacks as follows:1. Bonding nonwoven fabric strips to the surface of the rubber core member in a crossed manner results in uneven distribution of elasticity, affecting ball bouncing balance.2. Because nonwoven fabric strips are bonded to the top and bottom sides of the rubber core member third times (see FIGS. 7, 8, 10 and 11), wall thickness at the top and bottom sides becomes relatively thicker than other areas, causing uneven distribution of elasticity and affecting ball bouncing balance.3. As the nonwoven fabric strips are made of a chemical fiber material, they are not capable of being decomposed by biological agents when the ball is worn out.

Thus, this design is not environmentally friendly.

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