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Extruded monolithic foam earplug

Image Number 2 for United States Patent #6408981.

A monolithic earplug being compressible or deformable. The earplug is fabricated from an extruded, elastomeric thermoplastic in order that it may be rapidly and efficiently produced, and then the extrudate is cut at the die face, as it emerges therefrom, into discrete pieces to form earplugs having convex end portions and a skin extending over its entire outer surface.

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