Combined carpet yarns by open end rotor spinning
AssigneeE. I. Du Pont de Nemours and Company
InventorsPaul W. Yngve, Peter Artzt, Gerhard Egbers, Ullrich Stark, Heinz Muller
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a combined yarn which includes feeding staple fibers to the collection groove of an open-end spinning rotor, twisting the staple fibers into a staple fiber yarn, combining the staple fiber yarn with a continuous filament yarn which is also fed into the spinning rotor and then twisting the continuous filament yarn and the staple fiber yarn together to form a balanced ply yarn.
Claims13
A method for manufacturing a combined yarn suitable for use in carpets and upholstery comprising the steps of:
- (a) passing a continuous filament yarn having a denier of 20-2500 under tension through a hollow spindle of an open end spinning rotor having a consolidating groove;
- (b) feeding crimped staple fibers having 6-34 dpf and 75-200 mm in length into the consolidating groove of the open end spinning rotor;
- (c) twisting the staple fibers during passage of the staple fibers from the consolidating groove to a grooved navel surrounded by said rotor;
- (d) combining the continuous filament yarn and the staple fibers in the navel;
- and
- (e) adjusting the feed rate and the take-away rate to form a combined yarn having a balanced ply whereby the combined yarn has a mechanical twist of 1.5-7 tpi.
A combined yarn suitable for use in carpets and upholstery prepared by a process comprising the steps of:
- (a) passing a continuous filament yarn having a denier of 20-2500 under tension through a hollow spindle of an open end spinning rotor having a consolidating groove;
- (b) feeding crimped staple fibers having 6-34 dpf and 75-200 mm in length into the consolidating groove of an open end spinning rotor;
- (c) twisting the staple fibers during passage of the staple fibers from the consolidating groove to a grooved navel surrounded by said rotor;
- (d) combining the continuous filament yarn and the staple fibers in the navel;
- and
- (e) adjusting the feed rate and the take-away rate to form a combined yarn having a balanced ply whereby the combined yarn has a mechanical twist of 1.5-7 tpi.
Dependencies are inferred from the claim text.