The United States of America As Represented by the Secretary of

George F Ruppenicker

Russell M Kullman

Craig L Folk

A Paul Sawhney

Charles L Shepard

Clarence O Graham, Jr

Core/wrap yarn is produced by continuously forming air jet-spun yarn and uninterruptedly continuously passing it to a friction spinner for purposes of wrapping the air jet-spun yarn with fibrous material in the friction spinner, so as to form core/wrap yarn.

Production of core/wrap yarns by airjet and friction spinning in tandem

A unique process for producing torque-free or balanced yarns of staple fibers with glass filament cores is disclosed. Staple fiber roving is fed through a drafting system. Glass filament is fed into the center of the staple fiber just prior to entering the front rolls of the drafting system. Sufficient twist is applied to the fiber around the glass filament using the ring spinning process and two or more of these yarns are ply twisted in the opposite direction of the spinning direction to firmly lock the staple fiber to the glass filament. The twist multiplier range for spinning is between 3.0 to 3.5 and for plying is betwen 3.5 and 4.5. Cotton fiber is the principle fiber used with a glass filament core. The resulting yarn can be tied by knotting onto existing loom beam ends when breaks occur during weaving without shearing of the yarns.

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Kenner, LA, United States of America

George F Ruppenicker