US1736592A - Process for the manufacture of cotton yarn and improved product - Google Patents

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i V Patented Nov. 19, 1929 UNITED STATES PATENT OFFICE I EUGENE '0. GWALTNEY, F LAUREL HILL, NORTH CAROLINA PIBOCESQ I63 THE H'ANUFAGLURE OF COTTON YARN AND IMPROVED PRODUCT Io Drawing.

My invention relates to an improved process for the manufacture of cotton yarn, and to as been from to 20%. The theory has.

been that the improvement in breaking strength of combed yarn over carded. yarn has been due to the fact that the short fibres were eliminated in the combing rocess. My experience has shown that improvement in reak is due, not so much to the elimination of short fibres but, rather, to a more perfect parallelization of the fibre in the comber.

I have proven that'a comber using coarser needles with a wider spacing between the needles taking out a larger percentage .of

waste will not give a breakin any way equal to that produce on a comber in which the needles are fine and closely set taking out awaste percentage of not over 2%,

thus demonstrating that the increase in break is due rather to the perfect strai htenin' of the, fibre than to the elimination 0% short fiire In In process, the combed silver used is'produce with'the smallest possible amount of fibres removed and i for the purposes of straightening and parallelizing the fibres and improved cleanliness.

In-my improved rocess and product, I

combine both combed and carded fibres into slivers, and in that way overcome the unevenness due to the piecings inherent in the combed sliver process re erred to and get a more uniform distribution of the fibres, thus taking advantage of, and utilizing, the more uniform distribution of the fibres well known to exist in the ordinary carded sliver, and also the more perfect parallelized fibres in combed sliver whlch assists in the subsequent drafting of the carded sliver in the manufacture of the finishedyarn.

The blendin of the more uniform and evenly carded iver with the combed sliver tends to eliminate the unevenness and to disstrength of the carded yarn or cord is sevenstrength in named society Application filed m a, 1921. Serial No. 204,54

creased over the breakfilg strength of either the combed or the carded yarn alone. In other words, the blending of the two gives a stronger yarn than either of the two are when spun separately. For instance'on carded one and three-sixteenth inch cotton spun and twisted in a tire fabric cord, the breaking teen and one-half pounds; of the combed, it was eighteen for the blended, that is the combed and carded, eighteen and one-half pounds. These tests were all made by a member of the American Society for Testing Materials, who is also a member of the Tire FabricCommitte'e, with the latest approved testing-machines corrected for moisture regain, the tests all having been made in the laboratog where the atmospheric conditions were m ntained to give the standard regain of six and one-half per cent, all in accordance-with the regulations as laid down by the abovefor testing cord fabric. Tests of the single yarns give practically the same 80 result.

In the foregoing process, as now operating, the percentage of waste on the combed fibres is held down from ten per cent to less than two per cent, which latter waste percentage makes a yarn cost but very little more than a carded yarn, while in strength it is much superior to a combed yarn.

Also I get'the following improvement on carded yarns: Increasing cleanliness and greater lustre due to the combing operation,

better. drafting qualities in subsequent proc- 7 ed and combed cotton slivers or rovings are ,give an increased strength to res uct.

combined in the formation of a thread, yarn, twine or card, to give an increased strength to resulting product. 1

2. An im roved process in which the carded and com ed cotton slivers or-rovings are combined in the formation of a thread, yarn, twine or cord in which the waste from the combed sliver does not exceed ten fer cent, to

ting prod- 3. A thread, yarn, twine or cord composed of'a blending of combed and carded cotton fibers to give an increased strength to resulting product.

4. A thread, yarn, twine or cord composed of a blending of combed and carded cotton slivers, in which the waste from the combed sliver is held so low as to not materially increase the cost of resulting product though resulting in greater strength. i

5. As a new process, the blending together of carded and combed cotton slivers or fibers.

6. As'a new .process of manufacture, the

blending together of carded and combed cot- 1 ton slivers or fibers in theformation of a thread, yarn, twine or cord.

In testimony whereof I aflix my si ature. EUGENE C. GWALT Y.