# US 5,701,729 A · System for forming elastomeric core/staple fiber wrap yarn using a spinning machine

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- Number: US 5,701,729 A
- Document ID: US5701729A
- Status: Granted
- Kind: A
- Application number: 08/657,182
- Filed: 1996-06-03
- Granted: 1997-12-30
- Earliest claimed: 1995-06-06
- Assignees: Dixie Yarns, Inc.
- Inventors: John Joseph M. Rees; Leonard L. Hixon, Jr.
- Web page: https://patentgrep.com/patent/US5701729A

## CPC

- D02G 3/324: {using a drawing frame}
- D02G: CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS

## Abstract

A system for forming elastomeric core/staple fiber wrap yarn using a spinning machine such as an air jet, roller jet or roller spinning machine. The system includes a package drive assembly, yarn motion and presence sensors, an improved drafting assembly and a yarn clearer delay cylinder to provide continuous formation of superior quality elastomeric core/wrap yarn.

## Claims

### Claim 1

A system for forming elastomeric core/wrap yarn using a spinning machine including a drafting zone for drafting sliver and a spinning zone for spinning the drafted sliver around the elastomeric core to form the elastomeric core/wrap yarn, said system comprising:
threading means for feeding elastomeric yarn to the drafting zone of the spinning machine;
feed means for providing a controlled supply of elastomeric yarn to said threading means; and
elastomeric yarn sensing means for detecting an elastomeric yarn passing through said threading means;
wherein the elastomeric yarn and sliver fed through the drafting zone are combined in the spinning zone to form an elastomeric core/wrap yarn.

### Claim 2 (depends on 1)

The system of claim 1, further comprising roll wrap sensing means for detecting yarn wrapped on a roller in the drafting zone of the spinning machine.

### Claim 3 (depends on 1)

The system of claim 1, further comprising drafting zone clearing means for removing debris from the drafting zone of the spinning machine.

### Claim 4 (depends on 1)

The system of claim 1, wherein said threading means comprises:
a main body having an entrance end, an exit end, and a yarn delivery bore extending through said main body from said entrance end to said exit end;
clamping means for holding the elastomeric yarn at a location proximate said entrance end of said main body;
clamping/cutting means for holding and cutting the elastomeric yarn at a locatio proximate said exit end of said main body; and
air delivery means for providing air flow through said yarn delivery bore to convey the elastomeric yarn through said yarn delivery bore to the drafting zone.

### Claim 5 (depends on 1)

The system of claim 1, further comprising a drafting assembly in the drafting zone of the spinning machine, said drafting assembly comprising:
a main body frame;
roller means for drawing and conveying the sliver, said roller means comprising a pair of opposed apron rollers and a pair of opposed front rollers;
clearer means for removing debris from at least one of said pair of opposed apron rollers;
front roll wrap sensor means for sensing yarn wrapped on at least one roller of said pair of opposed front rollers; and
said threading means for introducing the elastomeric yarn to said front rollers.

### Claim 6 (depends on 1)

The system of claim 1, wherein said feed means comprises:
a vertically oriented mounting plate having a front surface and opposed rear surface, and upper and lower portions;
a drive roller extending substantially perpendicularly from said lower portion of said front surface of said mounting plate;
means for rotating said drive roller at a desired speed;
a creel package tube holder subassembly extending substantially perpendicularly from said upper portion of said front surface of said mounting plate, to carry a cylindrical creel package; and
means for providing biased movement of said creel package tube holder subassembly toward said drive roller to provide constant contact between the outer peripheral surface of a cylindrical creel package and said drive roller.

### Claim 7 (depends on 1)

The system of claim 1, wherein said elastomeric yarn sensing means comprises:
a housing;
rotatable wheel means provided on said housing and having a circumferential surface on which the elastomeric yarn travels and having opposed metal side surfaces; and
means for generatingmagnetic eddy currents through said opposed metal side surfaces to inhibit rotation of said wheel means more at high rotational speeds than at low rotational speeds.

### Claim 8 (depends on 1)

The system of claim 1, wherein said elastomeric yarn sensing means comprises:
a housing;
rotatable wheel means provided on said housing and being rotated by movement of the elastomeric yarn; and
means for sensing the rotational speed of said wheel means.

### Claim 9 (depends on 1)

The system of claim 1, further comprising:
yarn clearer sensor means through which the elastomeric core/wrap yarn passes, for detecting defects therein; and
yarn clearer delay means for selectively interrupting flow of the elastomeric core/wrap yarn through said yarn clearer sensor means.

### Claim 10 (depends on 1)

The system of claim 1, wherein said spinning machine is an air jet spinning machine.

### Claim 11 (depends on 1)

The system of claim 1, wherein said spinning machine is a roller jet spinning machine.

### Claim 12 (depends on 1)

The system of claim 1, wherein said spinning machine is a roller spinning machine.