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Ball for ball game and method for manufacturing the same

  • US 7,427,246 B2
  • Filed: 12/20/2002
  • Issued: 09/23/2008
  • Est. Priority Date: 12/20/2002
  • Status: Expired due to Term
First Claim
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1. Method for manufacturing a ball for a ball game, said ball comprising:

  • (a) a bladder including a valve for introducing air into said bladder;

    (b) a fabric layer located on an outer surface of said bladder comprising a plurality of fabric pieces,wherein each of said plurality of fabric pieces has marginal edges which are folded inwardly,wherein said marginal edges of adjacent fabric pieces are sewn together with a sewing machine, so that said plurality of fabric pieces are joined to have a spherical shape,wherein a valve opening is formed in a first one of said plurality of fabric pieces, and a hole for reversing said fabric layer and for accommodating said bladder is formed in a second one of said plurality of fabric pieces wherein the second one of said plurality of fabric pieces is located opposite the first one of said plurality of fabric pieces; and

    (c) a skin layer located on an outer surface of said fabric layer, said skin layer comprising a plurality of panels;

    said method comprising the steps of;

    (i) forming the fabric layer by superposing two adjacent fabric pieces, sewing along a marginal edge of the superimposed fabric pieces with a sewing machine, locating said marginal edge on the outer side of the fabric layer and repeating until all fabric pieces are joined to form a spherical fabric layer;

    (ii) reversing said fabric layer through said hole to locate said marginal edges on an inner side of the fabric layer;

    (iii) inserting said bladder into the fabric layer through said hole within said fabric layer;

    (iv) closing said hole; and

    (v) forming said skin layer on the outer surface of said fabric layer.

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