Process for forming double-strand monofilament line for use in flexible line trimmers
US5814176A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1996 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Feb 6, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1044
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.