Wellman Inc.

Rudy Lee Crews

Winston Patrick Moore

Todd Joseph Scheerer

Jesse Robert Fletcher

A spinning apparatus is disclosed according to the invention having a drafting zone comprising at least four roll pairs for drawing a sliver comprising one or more types of staple fibers. The rolls pairs include a back roll pair, intermediate roll pairs and a front roll pair and the distance between the nip of the back roll pair and the nip of the adjacent intermediate roll pair, and the distances between the nips of adjacent intermediate roll pairs is no more than the effective fiber length of the longest staple fiber type in the sliver. The drafted sliver may be spun into yarns at high speeds, such as the speeds used in air jet spinning apparatus to provide yarns having increased strength and reduced defects. The present invention also includes a method of forming high quality and high uniformity yarns by advancing a sliver through a drafting apparatus and thereafter spinning the sliver into yarn.

Spinning apparatus, method of producing yarns, and resulting yarns

A drafting and spinning apparatus is disclosed that produces highly uniform yarns with improved mechanical properties. The apparatus comprises a plurality of pairs of drafting rolls for drawing a sliver formed of one or more types of staple fibers, each fiber type having a predetermined effective fiber length. The plurality of pairs of drafting rolls comprises at least two pairs of intermediate rolls, with the distances between the nips of adjacent intermediate roll pairs being no more than the effective fiber length of the longest fiber type in the sliver. The apparatus further includes device for spinning the sliver into yarn at a take-up speed of greater than 150 meters/minute.

Drafting apparatus and method for producing yarns

A spinning apparatus is disclosed according to the invention having a drafting zone comprising at least four roll pairs for drawing a sliver comprising one or more types of staple fibers. The rolls pairs include a back roll pair, intermediate roil pairs and a front roll pair and the distance between the nip of the back roll pair and the nip of the adjacent intermediate roll pair, and the distances between the nips of adjacent intermediate roll pairs is no more than the effective fiber length of the longest staple fiber type in the sliver. The drafted sliver may be spun into yarns at high speeds, such as the speeds used in air jet spinning apparatus to provide yarns having increased strength and reduced defects. The present invention also includes a method of forming high quality and high uniformity yarns by advancing a sliver through a drafting apparatus and thereafter spinning the sliver into yarn.

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Gastonia, NC, United States of America

Rudy Lee Crews