Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Stretching or stretch forming
Patent
1977-11-21
1979-05-22
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Stretching or stretch forming
43 44, 43 98, 428399, 428910, B29C 1702
Patent
active
041559738
ABSTRACT:
The invention provides a tapered filament of nylon, or a like drawable synthetic resin plastic. A leader for fishing tackle is a preferred use for such a filament.
A tapered filament blank of undrawn material is formed and drawn to produce the finished product. The drawing operation is effected, essentially, by holding the larger end of the filament blank with a fixed grip and the smaller end of the filament blank with a shiftable grip. The shiftable grip is shifted along the reach of the filament to remain near the shoulder of the draw as the draw proceeds. A preferable operation will provide for drawing from the small end of the filament towards the larger end and winding the drawn portion upon a drum, or pulling it by gripping rolls, and moving the larger end of the filament towards the drum, or rolls, at a rate which holds the draw shoulder near the drum or rolls.
Undrawn blank filaments may be manufactured by injection molding or extrusion operations.
REFERENCES:
patent: 2249510 (1941-07-01), Welker
patent: 2515175 (1950-07-01), Arbogast
patent: 3380122 (1968-04-01), Kirk
patent: 3505444 (1970-04-01), Stanley
patent: 3508553 (1970-04-01), Kambar et al.
patent: 3577987 (1971-05-01), Bronnenkant
patent: 3781402 (1973-12-01), Hanggi et al.
Kraft Dennis O.
Lowe James B.
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