Assembly for use in continuously forming one or more lengths...

Plastic article or earthenware shaping or treating: apparatus – With upstream screen or perforated plate for straining,... – Upstream of multi-orifice shaping die

Reexamination Certificate

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Details

C425S131500, C425S382300, C425S066000, C156S433000, C156S441000, C156S494000, C156S498000

Reexamination Certificate

active

10713967

ABSTRACT:
An assembly for use in continuously forming a plurality of lengths of flexible noise attenuating cutting line for use in rotary vegetation trimmers. The assembly includes a breaker plate having a conically shaped inner portion and a planar outer portion. A plurality of extrusion dies are disposed in the outer portion wherein each die defines a die hold configuration at its lower end for the extrusion of one or more monofilament polymer strands therethrough, and a drive assembly is provided for rotating each of the dies at a predetermined speed such that upon directing a flow of molten monofilament polymer material onto the breaker plate, the material is directed from the inclined central portion onto the planar outer portion where it is extruded through the rotating dies to create a plurality of twisted strands of polymer material that upon cooling, stretching and heating, define lengths of flexible noise attenuating cutting line.

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