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US 4,229,404 AGranted
Method for drawing yarn
AssigneePhillips Petroleum Company
InventorsCharles S. Hatcher, Kenneth E. Smith
Life of this patent
Estimating the term…
Abstract
A plurality of yarns are drawn from supply sources onto feed rolls and over a set of draw rolls in adjacent relationship. The yarns are urged into a desired contiguous relationship on the draw rolls by a concave guide surface in the course of passing from the yarn feed rolls to the draw rolls.
Claims8
A method for cold drawing a plurality of yarns comprising:
- (a) withdrawing said yarns from an equal number of supply sources by winding said yarns about driven feed roll means in parallel spaced relationship with one another and in a predetermined order;
- (b) advancing said yarns in a single, normal plane determined by the surface of said feed roll means and in said predetermined order;
- (c) urging said yarns into a concave arc whose tangent at the midpoint of said arc forms an angle of approximately 45.degree. with said normal plane, whereby said yarns are urged into substantial contiguous side-by-side relationship and maintained in said predetermined order;
- and
- (d) stretching said yarns by winding said yarns about draw roll means, driven at a speed greater than the speed of said feed roll means, in said contiguous side-by-side relationship and in said predetermined order.
2 more elements
Dependencies are inferred from the claim text.