Metal bat for use in baseball
AssigneeSomar Corporation
InventorsMasatoyo Okitsu, Katsuji Kitagawa, Masao Kubo, Toshiyuki Arisato
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Abstract
A metal bat for use in baseball is disclosed which includes a tubular metal body having an impact portion for hitting a ball, and a layer of a resin foam provided on and bonded to the inside wall of the impact portion and having a density of 0.05-0.5 g/cm.sup.3.
Claims5
A metal bat for use in baseball, comprising a tubular metal body having an impact portion for hitting a ball, and a layer of a foamed coating of a powder resin coating composition, provided on and bonded to the inside wall of said impact portion and having a density of 0.05-0.5 g/cm.sup.3.
A method of producing a metal bat for use in baseball, comprising the steps of:
- (a) providing a baseball bat having a tubular metal body which is closed at both a grip end and the opposite end thereof and which has an impact portion for hitting a ball;
- (b) providing an expandable, powder coating composition;
- (c) forming in said grip end an opening of a size permitting a spray nozzle to be inserted therethrough;
- (d) heating said impact portion to a temperature so that said powder coating composition can be adhered to the inside wall of said impact portion;
- (e) inserting said spray nozzle through said opening and spraying said powder coating composition through said nozzle into the inside of said tubular metal body to form a coating of the powder coating composition on the inside of said impact portion;
- (f) heating said impact portion whose inside wall has been provided with said coating to a temperature sufficient to expand said coating;
- and
- (g) closing said opening.
Dependencies are inferred from the claim text.