Title:
BALL FOR BALL GAME AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JPS60150763
Kind Code:
A
Abstract:
A plurality of granules of a hard synthetic resin and a soft synthetic resin are heated with a blowing agent to a temperature between the softening temperatures of the hard and soft resins for a predetermined time and are molded to form a ball. The resultant ball has a plurality of bubbles in the soft synthetic resin which surrounds the granules of hard synthetic resin and a suitable cover of leather or rubber is provided for the ball.
Inventors:
NAKAJIMA KEIJI
Application Number:
JP574484A
Publication Date:
August 08, 1985
Filing Date:
January 18, 1984
Export Citation:
Assignee:
NAKAJIMA KEIJI
International Classes:
A63B69/00; A63B37/00; A63B37/02; A63B45/00; B29C44/00; B29C70/58; B29D99/00; (IPC1-7): A63B37/02; A63B45/00