Method of manufacturing noise attenuating flexible cutting...

Details Method of manufacturing noise attenuating flexible cutting... Method of manufacturing noise attenuating flexible cutting...

2011-04-05

2011-04-05

Del Sole, Joseph S (Department: 1743)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

C264S177170, C264S210200

Reexamination Certificate

active

07919028

ABSTRACT:
A process for forming flexible noise attenuating cutting line for use in rotary vegetation trimmers formed of at least two monofilament polymer strands bonded together in a twisted disposition or a single strand twisted about its central axis in which the strand or strands are extruded in a molten disposition through a single die that is rotated during the extruding step either to twist the two strands together about a central longitudinal axis or a single strand about its own longitudinal axis such that upon cooling, stretching and heating, a flexible noise attenuating line is created in a continuous online process.

REFERENCES:
patent: 4288463 (1981-09-01), Groff et al.
patent: 4504432 (1985-03-01), Kamei et al.
patent: 5609903 (1997-03-01), Israel et al.
patent: 5807462 (1998-09-01), Proulx

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