Patent ID: 7718103
Filing Date: 2010-05-18
Classification: A01D,B29C,D01D,D02G,Y10T

Abstract:
1. A process for forming a flexible noise attenuating cutting line for use in rotary vegetation trimmers comprised of at least two strands of monofilament bonded together in a twisted disposition, said process comprising the following steps: extruding a pair of molten strands of monofilament in an overlapping or adjacent disposition through a die; rotating said die during said extruding step to twist said strands together about a central longitudinal axis so as to form a single twisted length of molten monofilament defining substantially opposed troughs extending along said axis; directing said twisted length of molten monofilament a cooling quench bath; and pulling said twisted length through the bath to effect crystallization thereof whereby a single length of flexible noise attenuating cutting line is formed.