Process for draft control on feeding of elastic yarn
AssigneeInvista North America S.A.R.L.
InventorRonald D. Bing-Wo
Life of this patent
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Abstract
A method for unwinding yarn is provided that allows for maximizing the draft of the yarn, while monitoring tension. The method includes providing a yarn package including elastic yarn; choosing a selected draft for said elastic yarn; unwinding the elastic yarn from the yarn package from a driven roll to yarn processing equipment at the selected draft which is determined by a ratio of a speed of the yarn at the yarn processing equipment to a speed of the driven roll; measuring tension in the elastic yarn; and providing an alarm when said tension reaches a critical level.
Claims10
A method for unwinding an elastic yarn from a yarn package for use in a yarn process which maximizes and maintains a consistent selected draft of the elastic yarn, said method comprising:
- (a) providing a yarn package including elastic yarn;
- (b) choosing a selected draft for said elastic yarn;
- (c) unwinding said elastic yarn from said yarn package from a driven roll to yarn processing equipment at said selected draft which is determined by a ratio of a speed of said yarn at the yarn processing equipment to a speed of the driven roll;
- (d) measuring tension in said elastic yarn;
- (e) providing an alarm when said tension reaches a critical high tension level or a critical low tension level;
- and
- (f) automatically adjusting draft when said tension reaches a critical high tension level or a critical low tension level.
Dependencies are inferred from the claim text.