Патент USA US2125255код для вставки
July 26, 1938. K. G. DOUGLAS CIRCULAR KNITTED ELASTIC ,FABRIC Filed Dec. 3, 1936 w 2,125,255 2,125,255 Patented July 26, 1938 l PATENT OFFICE -(UNITED " STATES v ' 2,125,255 CIRCULAR KNITTED ELASTIC FABRIC Keith G. Douglas, Needham Heights, Mass., as signor to William Gorse Co., Inc., Needham Heights, Mass., a corporation of Massachusetts Application December 3, 1936, Serial No. 114,068 V 1 Claim. (Cl. ‘S6-_190) v My present invention relates to circular knitted \ï elastic fabrics and to the method of knitting the ' same whereby al predetermined limit pf stretch is obtained. In ^`the usual method at present employed in the knitting of elastic fabric on circular knitting .machines, it is customary to employ a standard type of knitting machine or apparatus and to form .the knitted article in a spirally progressive 10 operation, utilizing elastic or elastic-covered threads and material. Such elastic knitted arti cles are of special use and importance in the mak ing of surgical stockings, abdominal supporters, corset strips, or the like. In my present invention I have/developed a novel method of utilizing the circular knitting of seamless elastic articles with a novel type of Fig. 2 is an enlarged fragmentary detailed view illustrating the front, or outside, of the fabric; Fig. 3 is a corresponding fragmentary view of the back, or inside; Fig. 4 is a fragmentary View in cross-section, and Fig. 5 is a corresponding front view illustrating the fabric stretched to the limit permitted by my novel construction. In the usual 4circular type of knitting machines, wherein a seamless tubular elastic fabric is knit by spiral knitting, I so position and arrange cer tain of the knitting needles in staggered relation so that a finishing front thread, preferably of rayon or the like to give a proper appearance, 15 may be knitted into and along the front of the fabric in practically a diamond form of- inter locked stitch, While simultaneously knitting at the knitted stitch which limits the stretch or elasticity of the article, thus producing a predetermined extent of _stretch in the completed article. `It is also an object of my present invention to provide an attractive, strong, and eilicient elastic -knit article with the limiting stitches preferably back of the fabric a cotton thread interlocking with the rayon thread and knitting same around 20 on elastic members. arranged in a substantially diamond-shaped con tour as the same are interlocked during the cir may include a separate line of stitching for such 25 stretch limiting purposes and either at the front or at the back, or both, as in the preferred form and as herein illustrated. cular knitting action. Thus, my present linvention is entirely distinct from any woven article since I provide a circular seamless knitted fabric and With all the peculiar advantages incident to a seamless structure and continuous production. 30 v ' In carrying out my present invention I prefer ably utilize elastic-covered thread of the usual type, and thereupon knit a rayon thread appear ing on one side, preferably the front of the fabric for appearance and finish, with a cotton thread on‘the opposite side, or back, although this is not, of course, essential as the same material can be utilized on both front and back. " In carrying out my invention by my novel proc 40 ess I arrange a specially staggered type of stitch ing for both the rayon and the cotton threads, thus producing, in effect, a diamond-shaped stitch throughout the elastic material which will thus limit the stretch of the elastic fabric thru the 45 controlled ,action of the diamond-shaped stitch ing, a diamond form being capable of stretching only to a predetermined extent and thereupon limiting the same and, in effect, locking the fabric to th_e limit o_f stretch to the capacity of the form 50 of the diamond stitch. Referring to the drawing illustrating preferred My invention broadly considered while pref erably employing the knitting of the stitches adapted to limit the stretch of the material yet Referring to the drawing wherein the 'circular knit tubular fabric l is formed from any suitable 30 sized material, and of such length, contour, strength, and color as desired, for use in abdom inal belts, surgical stockings, knee-cap sup porters, etc., shown diagrammatically in Fig. l, wherein covered elastic threads 2-2 are knitted in the circular' machine with the rayon thread 3 and cotton thread 4. By so positioning and staggering the dial needles and cylinder needles of the knitting machine, I am enabled to form my novel knitted stitch which presents substan 40 tially a diamond-shaped contour of interlocking stitches, as shown in Figs. 2 and 5, which diamond-shaped stitching will limit the elasticity of the completed fabric when stretched in a verti cal direction, as shown in the drawing, to the 45 limit accorded by the flattening of the diamond shaped stitching as shown in Fig. 5. Thus the stretch is predetermined by the interlocking stitching formed by the knitting machines and thus prevents undue stretching as well as giving 50 a control of the elasticity or stretch in the com pleted fabric. embodiments of my present invention, ` 'I‘he result is that I'produce an elastic fabric Fig. 1 is a diagrammatic fragmentary view of comprising a facing thread and a backing thread the tubular knitted seamless fabric embodying v1n vwhich the backing thread is knit into au the 55 55 my invention; 2 2,125,255 rib wales only in .every course, and the facing thread is knit into all the plain wales in every course, and into alternate rib wales >only in alter nate courses, and into intervening rib wales in in _which‘the backing thread is knit into all the rib wales only in every course, andf the facing thread is knit into all the plain wales in every course, and into alternate rib wales only in alter nate courses, and into interveniné rib wales only in intervening courses, there beingan unknitted elasticstrand incorporated between the rib and 'intervening courses, and providing also an un knitted elastic strand incorporated between the rib and the plain wales. I claim: ` ' . - plain wales. y As a' new article of manufacture, a rib fabric 10 comprising a lacing thread and a backing thread yKEITH G. DOUGLAS.