Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Endless surface means to shape fluent material
Patent
1988-06-02
1989-05-02
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Endless surface means to shape fluent material
156125, 264167, 264308, 2643282, 2643288, 425543, 425547, 425572, 425574, 425381, B29C 4514
Patent
active
048264164
ABSTRACT:
A ring tread (12) or a continuous tread (16) may be injection molded in a generally cylindrical segmental mold (20) having a core (42) and radially movable segments (46) forming a mold cavity (54). A container ring (60) is movable into engagement with the segments (46) during closing of the segmental mold (20) to retain the segments (46) during closing of the segmental mold (20) to retain the segments (46) in position during injection and curing. The container ring (60) may have an opening for a continuous tread section to extend from the mold cavity (54) through the side of the container ring (60) and through a space between two of the segments (46). Roller supports on the core (42) support the continuous tread (16) when the segmental mold (20) is opened and sections of the continuous tread (16) are shifted circumferentially through the mold cavity (54).
REFERENCES:
patent: 2710425 (1951-05-01), Rhodes
patent: 2897540 (1959-08-01), Rhodes
patent: 3992503 (1976-11-01), Henfrey et al.
patent: 4185065 (1980-01-01), Knipp et al.
patent: 4230649 (1980-10-01), Bohm et al.
patent: 4588365 (1986-05-01), Holzschuh
Majerus Norbert
Rambacher John S.
Heitbrink Timothy W.
Lacher Frederick K.
Lewandowski T. P.
The Goodyear Tire & Rubber Company
Woo Jay H.
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