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US 4,536,143 AGranted
Apparatus for continuously molding of articles with plural band-like members
AssigneeTalon, Inc.
InventorGeorge B. Moertel
Life of this patent
Estimating the term…
Abstract
One or more inner bands are employed to cooperate with an outer band and a cavity wheel or inner molding member wherein portions of the inner band or bands together with the outer band and the cavity wheel or inner molding member are utilized to continuously form the cavities for continuously molding articles. The inner band or bands are employed to form core members, intermediate cavity wall portions, and/or stripping members for the molding cavities.
Claims3
An apparatus for producing a row of coupling members for a slide-fastener stringer comprising:
- a forming wheel provided on the periphery with a multiplicity of equispaced outwardly open forming beds having configurations complementary to contours of respective coupling members to be formed therein, and a circumferential outwardly open groove intersecting said beds;
- an endless forming band extending around a portion of the periphery of said wheel and provided with openings respectively registering with said beds whereby said each opening and the bed in registry therewith forms a respective mold cavity;
- an undercutting band received wholly in said groove and interposed between said periphery of said wheel and said forming band and projecting into said mold cavity, said forming band being of a width sufficient to span over said beds and said undercutting band on the periphery of said wheel;
- and
- means for introducing thermoplastic synthetic resin into each of said mold cavities to produce respective coupling members of complementary shape therein whereby, upon separation of said members from said wheel and said bands, said undercutting band forms an undercut portion in each coupling member.
2 more elements
Dependencies are inferred from the claim text.