Toothbrush and its manufacturing method

Details Toothbrush and its manufacturing method Toothbrush and its manufacturing method

1991-06-17

1992-10-27

Rosenbaum, Mark

Brush, broom, and mop making

Processes

264243, A46D 300

Patent

active

051583429

ABSTRACT:
A method of forming an integral piece of toothbrush, comprising firstly forming a toothbrush handle from thermo-plastic material by the process of injection molding to have a head portion longitudinally extending from an elongated hand-hold portion at one end and a concave-convex seat on said head portion and then, inserting said head portion in a cavity inside a molding device, which has a replaceable bristle molding comprised of a plurality of bristle molding elements each of which having a plurality of curved, tapered, unitary projecting strips, to directly mold bristles from thermoplastic material on said concave-convex seat and then, removing the molded toothbrush from said molding device after cooling.

REFERENCES:
patent: 2355744 (1944-08-01), Myers
patent: 2783490 (1957-03-01), Kutik
patent: 3004291 (1961-10-01), Schad

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