×

Ball for ball game and method for manufacturing the same

  • US 5,752,890 A
  • Filed: 09/08/1997
  • Issued: 05/19/1998
  • Est. Priority Date: 10/05/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A ball for ball game comprising:

  • a leather skin layer formed by sewing a plurality of leather panels by a thread, said leather skin layer having a spherical shape; and

    a bladder made of an elastomer having a hollow spherical shape, said bladder being accommodated in said leather skin layer, said bladder being provided with a valve for feeding air into said rubber bladder, said bladder being charged with air through said valve;

    wherein said thread is made of a self-shrink thread which is subjected to a shrinking treatment after sewing such that after shrinking, a high strength holding rate is provided binding said sewn leather panels of the leather skin layer of said ball to one another.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×