Reusable plugging dam for bowling balls

Details Reusable plugging dam for bowling balls Reusable plugging dam for bowling balls

1979-10-09

1982-09-28

Derrington, James H.

Static molds

Uniting preform with molding material

Mold supported by and girdles preform

249 83, 264 36, 425DIG60, B22D 1904

Patent

active

043515088

ABSTRACT:
A reusable plugging dam for bowling balls is provided for retaining suitable filling compound until set or hard in and somewhat above a finger hole of the ball to be filled such that sufficient filling compound is present to allow for shrinkage during curing or hardening, and be ground and polished to conform to the spherical shape of the ball. The dam includes a body and a suction structure for securing the body to the ball and prevent seepage of the filling compound between the ball and the dam. The body has a port therethrough so as to allow filling of the finger hole with filling compound. Dams are provided for single or multiple finger holes. In addition a dam is provided for use in conjunction with another dam and in particular for filling horizontally aligned holes, this dam having a cover to retain the filling compound in the dam.

REFERENCES:
patent: 2259281 (1941-10-01), Williams et al.
patent: 2875552 (1959-03-01), Stillman
patent: 3454440 (1969-07-01), Vezirakis
patent: 3858839 (1975-01-01), Bowman
patent: 3888454 (1975-06-01), Treadaway
patent: 3964726 (1976-06-01), Ott et al.
patent: 4061872 (1977-12-01), DeMonsy et al.
patent: 4191357 (1980-03-01), Nesbitt

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