Patent Application
20050202911
The present invention relates to a water-proof ball structure, wherein the manufacturing efficiency is increased and cost is reduced. Moreover, once after the ball core is manufactured, the wet-proof elastic bags can enclose the ball core immediately. Thereby, in other manufacturing process, the ball core will not be wetted.
With reference to
With reference to
Accordingly, the primary object of the present invention is to provide a water-proof ball structure, wherein the manufacturing efficiency is increased and cost is reduced. Moreover, once after the ball core is manufactured, the water-proof elastic bags can enclose the ball core immediately. Thereby, in other manufacturing process, the ball core will not be wetted.
To achieve above objects, the present invention provides a water-proof ball structure which comprises a ball core; at least two water-proof elastic bags enclosing the ball core; each water-proof elastic bag having at least one opening, the openings of the at least two water-proof elastic bags being not overlapped; and a cover enclosing the at least two water-proof elastic bags. Each water-proof elastic bag is made of two sheets, and each sheet has a shape like “8”. If the water-proof elastic bag does not enclose the ball core, the volume of each water-proof elastic bag is smaller than that of the ball core.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.
In order that those skilled in the art can further understand the present invention, a description will be described in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.
With reference to
Referring to
The ball core 60 is like the prior art one, with reference to
The water-proof elastic bag 70, as shown in
The cover 80, as shown in
By above elements, when the ball core 60 is shaped, the two water-proof elastic bags 70 tightly enclose the ball core 60 so as to form as an elastic water-proof elastic layer. In assembly, the openings 71 of the at least two water-proof elastic bags 70 are not overlapped. Thereby, the ball core 60 is water-proofed. Then, a yarn layer 90 further encloses the two water-proof elastic bags 70. A layer of glue is coated upon the yarn layer 90.
It is known from above drawings, since in the present invention, at least two water-proof elastic bags 70 are used to enclose the ball core 60 and the openings 71 of the at least two water-proof elastic bags 70 are not overlapped. The ball core 60 is water-proofed. Moreover, the operation of assembling the water-proof elastic bags 70 to the ball core 60 is more rapidly than the prior art by heating in mold. Thus, the manufacturing efficiency is increased and cost is reduced. Moreover, once after the ball core 60 is manufactured, the water-proof elastic bags 70 can enclose the ball core 60 immediately. Thereby, in other manufacturing process, the ball core 60 will not be wetted.
The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
