IP Library Granted Patent US 6,846,442
Granted Patent B2
US 6,846,442 · App. 10/261,626 · Granted Jan 25, 2005

Process for producing golf ball

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Quick Facts
Patent No.
US 6,846,442
App. No.
10/261,626
Granted
Jan 25, 2005
Kind
B2
Abstract

A process for producing a golf ball which includes the steps of placing a rubber composition into the cavity of a mold having an upper portion and a lower portion, clamping the upper portion and the lower portion together at a moving velocity of from 0.03. mm/s to 1.0 mm/s, causing excess rubber composition to flow out from the cavities; and unclamping the mold and removing from the mold cavity spherical bodies and associated rubber flashers formed in the mold cavities.

Claims (11)

1. A process for producing a golf ball which comprises:

placing a rubber composition into the cavity of a mold having an upper and a lower portion

clamping the upper portion and the lower portion together at a moving velocity of from 0.03 mm/s to 1.0 mm/s, causing excess rubber composition to substantially uniformly flow out from the cavities; thereby forming many ring-shaped rubber flashes and

unclamping the mold and removing from the mold cavity spherical bodies and the associated rubber flashes formed in the mold cavities.

2. The process for producing a golf ball according to claim 1 , wherein the ring-shaped, molded flashes form an integrated sheet.

3. The process for producing a golf ball according to claim 1 , wherein the rubber flashes removed in the removing step is in the form of a sheet which has many ring-shaped molded flashes.

4. The process for producing a golf ball according to claim 1 , wherein the rubber composition is placed into the cavity surrounding a spherical center.

5. The process for producing a golf ball according to claim 1 , wherein the percentage ratio of the volume of rubber composition placed into the spherical cavity to the volumetric capacity of the spherical cavity formed by the upper and lower portions of the mold is 103% to 120%.

6. The process for producing a golf ball according to claim 1 prior to said clamping step, wherein the upper and lower portions of the mold are brought in close proximity to each other at a moving velocity equal to or greater than 3.0 mm/s.

7. The process for producing a golf ball according to claim 6 , wherein the clamping step is initiated at a point in time when the space between the upper portion and the lower portion of the mold is from 5 mm to 30 mm.

8. The process for producing golf ball according to claim 6 , wherein the moving velocity prior to the clamping step is 3 to 120 mm/s.

Assignments (4)
MERGER Recorded Apr 17, 2018
From: DUNLOP SPORTS CO. LTD.
To: SUMITOMO RUBBER INDUSTRIES, LTD.
Reel/Frame 045959/0204 →
CHANGE OF NAME Recorded Apr 12, 2018
From: SRI SPORTS LIMITED
To: DUNLOP SPORTS CO. LTD.
Reel/Frame 045932/0024 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 16, 2005
From: SUMITOMO RUBBER INDUSTRIES, LTD.
To: SRI SPORTS LIMITED
Reel/Frame 016561/0471 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 2, 2002
From: SUGIMOTO, KAZUSHIGE
To: SUMITOMO RUBBER INDUSTRIES, LTD.
Reel/Frame 013350/0858 →