Patent ID: 6422851
Filing Date: 2002-07-23
Classification: B29C,B29D,B29K,Y10T

Abstract:
Apparatus for fabrication of a slide fastener having groups of fastener elements of differing colors comprising: an injection mold having separable parts defining tape grooves between the mold parts for receiving a pair of tapes on which individual fastener elements are to be molded and fastener element cavities spaced along said tape grooves for receiving fluid molding material to form fastener elements on said tapes, said cavities being arranged in groups, molding material injection conduits connected to each cavity in a group, and at least one molding material injection port in fluid communication with each injection conduit in a group whereby said groups of cavities may be connected to means for injecting molding material of different colors into said cavities of said groups, means for injecting molding material into said injection ports comprising a cylinder block in which a plurality of cylinders are provided, each of said cylinders having a molding material inlet and a molding material outlet for supplying molding material to an associated injection port, a piston support block, a piston in each said cylinder to cause molding material to flow from said outlets to said injection ports, said pistons being resiliently connected to said piston support block, and means for moving said piston support block toward said cylinder block to move said pistons into said cylinders.