E.i. Dupont De Nemours and Company

Ullrich Stark

Peter Artzt

Gerhard Egbers

Heinz Muller

Paul W Yngve

A method for manufacturing a combined yarn, by open end rotor spinning, suitable for use in carpets is disclosed.

Combined carpet yarns by open end rotor spinning

An improved method and apparatus for stringing up or re-stringing a balanced ply-twisted combination yarn of two components to insure strong piecing-up points. The end of the combination yarn and the end of a continuous filament yarn, which becomes a component of the combination yarn, are both prepared for piecing and inserted into the rotor of an open-end spinning device. Upon start up, the combination yarn engages staple fibers in the rotor consolidating groove while the continuous filament yarn engages the combination yarn within the rotor without any contact of the continuous filament yarn with the rotor consolidating groove.

Automatic piecing of combination open end rotor spun yarn

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.

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Stuttgart, Germany

Ullrich Stark