Process for forming double-strand monofilament line for use in flexible line trimmers
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United States of America Patent
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Sep 29, 1998
Grant Date -
N/A
app pub date -
Feb 6, 1996
filing date -
Feb 6, 1996
priority date (Note) -
In Force
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Abstract
A process for forming flexible cutting line for use in rotary vegetation trimmers of the type having two or more monofilament lines mounted on a common spool. The line produced by the process of the present invention defines two monofilament strands joined together in a side by side relationship by a severable bond. The process includes the steps of extruding one or more pairs of molten monofilament strands in proximate disposition, directing the strands together in a cooling quench bath, pulling the strands in an adjacent abutting disposition through the quench bath to initiate the crystallization and bonding together of the two strands, concurrently stretching and heating the bonded strands to effect parallel alignment of the molecular chain in the strands, heating the strands in a relaxed disposition, wetting the strands and spooling the wetted strands for storage and transportation.
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