Patent ID: 6695414
Filing Date: 2004-02-24
Classification: A46D,B29C,B29L

Abstract:
A method for manufacturing a brush head including an injection molded brush head carrier supporting a plurality of bristle filament bundles, comprising:(a) inserting first end portion (4) of the bristle filament bundles (3) in a first mold cavity (1), the other ends of the bristle filament bundles projecting outwardly from said first mold cavity via a perforated plate (6) that defines one wall of said first mold cavity; (b) injecting a relatively soft first synthetic plastic component (40) in the heated fluid state within said first mold cavity, thereby to encompass the first ends of said bristle filament bundles and, upon hardening, to define said brush head carrier (5); (c) transferring the brush head carrier to a position within a second mold having a larger second mold cavity (10) with the bristle filament bundles extending outwardly from said second mold via said perforated plate; and (d) injecting a relatively hard second synthetic plastic component (42) in the fluid state within said second mold cavity to at least partially cover and over-mold said brush head carrier, at least that portion of said brush head carrier surrounding said bristle bundle first ends being maintained in flush sealed engagement with said perforated plate, thereby to isolate the duct openings (7) of the perforated plate from said second component.