Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece – Coating or impregnating workpiece before molding or shaping...
Patent
1978-08-21
1980-01-08
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
With printing or coating of workpiece
Coating or impregnating workpiece before molding or shaping...
264132, 264162, 264262, 264275, 264277, B29C 1712, B29C 602
Patent
active
041827376
ABSTRACT:
An example of the shock resistant transparent polymer sphere is a billiard or pool ball. The molding apparatus includes lower and upper mold halves defining juxtaposed concave hemispherical surfaces to define a spherical mold cavity with a top fill opening on the upper mold half. Interlocking of the mold halves together is accomplished by tongue and window structures circumferentially spaced about the meeting points of the two halves at 120.degree.. A holder in the form of an annular ring is provided for supporting a central disc provided with a symbol on each of its opposite faces. The design is such that the ring when positioned in the spherical cavity defined by the mold halves supports the disc with its center coincident with the center of the spherical cavity. The molded sphere is made by a single pouring operation of resin through the fill opening, the disc and ring being encapsulated within the sphere. The composition of the resulting product is such that a bonding takes place between the disc, ring and resin material for the sphere resulting in a final sphere in which shock is absorbed by the disc, supporting ring, ink utilized in forming the symbol on the opposite faces of the disc as well as the resin as though the entire sphere were homogeneous throughout.
REFERENCES:
patent: 3046013 (1962-07-01), Kutik
patent: 3340342 (1967-09-01), Kane et al.
patent: 3344468 (1967-10-01), Moslo
patent: 3426121 (1969-02-01), Faulkner
patent: 3439917 (1969-04-01), Gentile
patent: 4116439 (1978-09-01), Chavarria
Fernandez Marlin D.
Haber Terry M.
Fernandez Joseph L.
Lowe James B.
Pastoriza Ralph B.
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