IL37559A

IL37559A - Tights and like articles

Info

Publication number: IL37559A
Application number: IL37559A
Authority: IL
Original assignee: Nova Tec Establishment
Priority date: 1970-08-25
Filing date: 1971-08-24
Publication date: 1974-11-29
Also published as: GB1351953A; FR2109710A5; DE2142616A1; DE2142616B2; CS158562B2; IL37559A0; ES419880A1; ES395020A1

Description

Improvements in tights and like articles D'DIT D SIDI 0330 '3"U3 0'7173G/ FIELD Off THE INVENTION ' The present invention relates to the manufacture of ': collants or tights, or like articles.

SUMMARY Off THE INVENTION According to the invention, there is provided a panty-hose method for forming a -e^-i-aa-ris- having two tubular leg portions and a pant portion using a circular knitting machine having, two groups of needles, wherein the pant portion is formed "by alternating motion of the two groups of needles to produce courses of stitches extending over substantially 360°, a yarn being passed from one group of needles to the other group of needles at each reversal- so as to form inner and outer longitudinally split tubular layers of fabric which are joined together along their longitudinal edge portions, and whereinthe leg portions are formed by continuous motion of the needles with an independent^eed to each group of needles so as to produce one leg portion ·, within the other leg portion, the said other leg portion having .a plain stitch and the said one leg portion having a purl stitch.

The le portions can be formed prior to the pant ' portion. Preferably, however, the pant portion is produced first, by alternating motion of the groups of needles, and then the leg portions are produced by continuous motion of the groups of needles. The two leg portions can be finished by a resilient cuff welt and closed at their ends.

Preferably, the circular knitting machine for producing the collant comprises two grooved beds for the needles, the beds being coaxial and having respective groups of needles arranged to operate independently without interfering with the needles of the other group, means selectively operable to rotate the beds synchronously through about 360°> an to continuously rotate the beds, means for feeding a common yarn to the two groups of . needles during the subsequent stages of the oscillatory motion, at each reversal, and to feed two yarns independently to the two groups of needles during the continuous rotational motion, and means for actuatin the needles of the two groups to form stitches alternately during the oscillatory motion, and for actuating the needles of the two groups to form the stitches simultaneously but without a reciprocal or mutual interference, during the continuous motion.

The two groups of needles are preferably formed, by two coaxial grooved cylinders, each including conventional- latch needles. However, the two groups of needles need not be cylindrical; for example one group can be conical, or can have radial needles. In each arrangement, the needles of one of the groups are offset with respect to the needles of the other group. ' Advantageously - especially when the two groups of ·: needles are cylindrical - each of the needles of at least one group, is flanked by two sinkers, whereby two sinkers ■ are located between two adjacent needles of that group.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described, by way of example only, with reference to the accompanying diagrammatic drawings, in which: panty-hose Figures 1 and 2 illustrate the manner in which tight-s are produced on a dual-cylinder circular knitting machine; Figure 3 is a perspective view of the finished igfc^s. '!■ after removal from the machine; . Figure 4 is a perspective view, to an enlarged scale, ; panty-hose of the upper end portion of the shown in Figure.3; ' Figure 5 is a section taken on line V-7 in Figure 4-; Figure 6 is a perspective view illustrating the manner panty-hose in which the %¾gi¥t>e- shown in Figure 3 are arranged in a configuration suitable for use; Figure 7 i a perspective view of the upper end portio panty-hose ■[ of the t±Eirtrs after being arranged' as shown in Figure -6; Figures 8 and 9 are fragmentary longitudinal sections through he needle cylinder of the knitting machine; Figure 10 is a view looking in a radial direction and illustrating the arrangement of the needles and sinkers of the knitting machine; and Figure 11 is a fragmentary, transverse section illustrating the arrangement of the needles of the knitting machine..

DESCRIPTION O · THE PREFERRED EMBODIMENT With reference to Figures 1- to 7» an more particularly to Figures 1 and 2, a circular knitting machine comprises two coaxial and oppositely directed needle cylinders 3and 3· The cylinder 1 is conventionally arranged and has needles 5 provided with latches at their upper end portions, while the cylinder 3 is inverted with respect to the cylinder 1 and has needles 7 provided with hooks and latches at their lower end portions the lower end portions of the needles lying adjacent the upper end portions of the needles 5· ganty-hose In the initial stages of forming the tigfct-s, the . cylinders 1 and 3 are operated wit a synchronous oscillatory motion, in such a manner that the cylinders after each reversal, rotate through an angle of at least 360°, to alternately form, when one cylinder rotates in one direction and the other cylinder rotates in the opposite direction, subsequent courses of stitches. The courses extend for . substantially 360° or a little less, each time the needles of one cylinder are active and the <, needles of the other cylinder are inactive. Further, upon ; each reversal, the yarn or combined yarns fed to the machine are. transferred from the cylinder which ceases to be active to the other cylinder which is active. In this manner, the needles of the two cylinders produce two layers-of fabric* viz. an external layer 9 and an internal layer.11♦ ,Each layer of fabric is formed with courses of stitches which extend over almost 360°, the courses forming the layer 9 being continuous, with the courses forming the layer 11 and vice versa, the two layers 9» H being^i effect, connected along two longitudinal edge portions 13* Adjacent the initial edge 9X, 11X of the layers 9, 11 respectively, a welt may be formed using a resilient yarn, to form a continuous resilient band, having a development such as that of the sections 9 and 11, corresponding substantially to twice- he circumferential development of a cylinder.

The two layers 9» 11 thus formed extend for a length which corresponds to the length of the pant portion of the panty--hose. finished tighte. The layers 9 and 11 are completed by a dual final course 13 of continuous stitches. Immediately after, two lengths of tubular fabric 17 and 19. are formed by continuous unidirectional rotation of the two cylinders 1 and 3 ; the tubular fabric 17 forms an extension of the layer 9 and the tubular fabric 19 forms an extension of the layer 11. The longitudinal edge portions 1J merge ■ at a point 21 which is located on the final course 15.

Upon the change from oscillatory motion to continuous rotational motion of the needle cylinders, the yarn feed is also changed. The two layers 9 } 11 are formed by a double yarn, fed by two yarn-guides moved together to cyclically feed the needles of each cylinder; in correspondent of the course 15 and of the point 21 , the two yarn-guides are separated and are fixedly positioned so that each guide feeds the needles of a respective cylinder, independently of the feed to the other cylinder. Thus the layers 9 and 11 are formed with · a yarn having a higher count than the yarn used to form the lengths of. tubular fabric 17 and 19 , panty-hose . which constitute the leg portions of the finished t-ig-ht-s-.

Alternatively, . the yarn can be replaced after the layers 9 and 11 have been formed, and two thinner yarns can be used to form two lengths of tubular fabric 17 and 19 · In a further arrangement the yarn, which has been used to form ' the layers 9 and 11 , is used to form one of the lengths of tubular fabric 17 or 19 , an additional independent yarn feed being provided for the other length of tubular fabric; 17 , or 19. Formation of the two lengths of tubular fabric 17 and 19 continues until they reach the desired length, . the two lengths extending axially through one of the cylinders (the cylinder 1 as shown in the drawing) . When the two lengths of tubular fabric 17 and 19 reach the desired length, the yarn feeds are interrupted and the. two lengths of tubular fabric 17 and 19 are detached from the respective needles. The lengths of tubular fabric 17 and 19 can also be formed using multiple feeds, and/or with appropriate patterns or with special stitches of per se known type.

As shown in Figure 3 the tubular fabric 19 is disposed within the tubular fabric 17. If, in the finished panty-hose -frights, the outer surface of the leg portion formed by. the tubular fabric 17 corresponds to the outer surface of the tubular fabric 17 as viewed in Figure 3» the outer surface : of the leg portion formed by the tubular fabric 19 corresponds to the innermost surface of the tubular fabric 19 as viewed in Figure 3· In order to arrange the leg portions in a configuration suitable for use, the end portion of the tubular fabric 19 is turned inwardly within itself and is withdrawn in the direction of the arrow fl in Figure > and is then withdrawn in the direction of the arrow f2 of Figure' 6 from the opening defined by the edge portions 13» The final configuration is shown in Figure 7, the layer 11 having been drawn in the direction of the arrow £3 of Figure 6. The band of resilient fabric adjacent to the edges 9X, 11X forms a waist band, the portions 13 form ■ a so-called "trousers middle cut" profile and the layers and 11 form the pants portion. The lower end of the leg portions can then be closed to form the foot portions of the tights if such closure is not effected on the knitting" machine. In the case where such closures are not required^ the lower end portions of the two leg portions can be finished with a cuff or with a 'resilient fabric.

The dual-cylinder knitting machine briefly described with reference to Figures 1 and 2 will now be described in' greater detail with, reference to Figures 8 to 11. •f · In the machine, the stitch forming planes P5 and P? . of the needles 5 and 7 of the cylinders 1 and 3 should be as close together as is possible in order to restrict the width of the longitudinal transition zones (viz. the edge portions 13) between the layers 9 and 11 formed by oscillatory motion of the cylinders-. Thus the working strokes of the needles 5 must extend between the inactive needles 7 and vice versa. In Figure 8 there is shown an active needle 5» fed by a double yarn F, while a needle 7 is shown in a reet position in which its latch 7 is closed. Arcuate sinkers 55 and 77? which are similar to those provided for one cylinder of conventional dual-cylinder machines are arranged in. both cylinders, and the needles are similar to those used in conventional single-cylinder machines. Further, as shown in Figures 10 and 11, the needles 5 and 7 are offset in such a manner that each needle 5 in- the yarn take-up position is interposed between two adjacent needles.. 7 and vice versa, two sinkers 55 being positioned between pairs of adjacent needles 5 and two sinkers 77 being positioned between pairs of adjacent needles 7· Each needle 5 can be inserted between the adjacent sinkers 77 of each pair, and each needle 7 can be inserted between the adjacent sinkers 55 of each pair. This arrangement allows the free motion of the needles of one cylinder and the feed thereof,: when the needles of the other cylinder are inactive. In o particular, for instance considering Figures 10 and 11, the needles ( or forming a course of the layer 9) and which are shown as inactive can freely rise between the needles 7 when the sinkers 77 have moved radially inwardly, the stitches' 11M last formed being shovm schematically in Figure 1 Further the needles 5. can freely pick up the yarn F which ΐ is fed tangential thereto.

The needles 5 and 7> which are similar to conventional latch needles, are arranged in such a manne that their shanks lie in a common imaginary cylindrical surface. In this manner the yarn take-up and the forming . of the stitches are smoothly effected during the oscillatory motion of the cylinders. The yarn-guide for the yarn, or the two yarn-guides for the two double yarns F, cyclically move between two symmetrical positions with respect to the two stitch forming planes P5 and P7 respectively for the needles 5 and 7· panty-hose The tights produced as particularly described is ..·. ' panty-hose·-similar to tights produced from two separate tubular portions longitudinally cut and then manually sewn together', panty-hose these latter tights being relatively expensive to produce, being liable to ladder and having other defects. ·

Claims

WHAT WE CLAIM IS: panty-hose 1.
A method for forming a -eoi-i-eirtr having two tubular leg portions and a pant portion using a circular knitting machine having two groups of needles, wherein the pant portion is formed by alternating motion of the two groups of needles to produce courses of stitches extending, over substantially 360°, a yarn being passed from one group of needles to the other group of needles at each reversal so as to form inner and outer longitudinally split tubular layers of fabric which are joined together along their longitudinal edge portions, and wherein the leg_portions are formed by continuous- motion of the needles with an . independent feed to each group of needles so as to produce one leg portion within the other leg portion, the said other leg portion having a plain stitch and the said one leg portion having a purl stitch. ing over substantially Ϊ5600, yarn being transferred from one group of needles to the other group of needles at each cycle, j50_as to form in .ejc_,and -out er ,longitudinally split layers of _ , fabric which are joined together along their longitudinal edge portions, and then forming the leg portions by continuous motion of the groups of needles with an independent feed to each group of needles so as to produce one leg portion within the other leg portion, the fabric of the outer leg portion having a plain stitch and' the fabric of the inner leg portion having a purl stitch, the inner leg portion subsequently being withdrawn from the outer leg portion.
3. A method as claimed in any one of the precedin claims, wherein the initial portion of the pant portion is formed by using a resilient yarn whereby ,to produce a resilient waist band.
4. A method as claim in any one of the preceding claims, wherein the pant portion is produced using two combined yarns supplied by two yarn-guides, and wherein each leg portion is produced using a respective one of the two yarns. Panty-hose
5. A method for forming a wtjbe-irb- substantially as hereinbefore described with reference to the accompanying drawings. panty-hose '
6. A collant formed by a method as claimed in any one. of the preceding claims.
7· A circular knitting machine for carrying out the method claimed in claim 1 comprising two coaxial grooved needle beds^^ roup of Jj £^ _ ^ £cj^a^e^ with ea.chj ej^i_j he^. beds being capable of being selectively oscillated synchronously through about 360° and continuously rotated, means operable to feed a common yarn alternately to-' each of the groups of needles at each' reversal during the oscillatory movement, and' to feed two yarns independently to the groups during the continuous rotational motion, and means operable to actuate the needles of the two groups alternately during the oscillatory movement, and to actuate the needles of the two . groups simultaneously, but without interference, during the continuous rotational motion of the two groups.
8. ' A machine as claimed in claim 7» wherein the needles of one group are offset with respect to the needles of the other group.'
9. A machine as claimed in claim 7 οτ claim 8," wherein the groups of needles comprise coaxial grooved cylinders, and conventional needles.
10. A machine as claimed in any one. of claims to 9 further comprising a respective sinker flanking each said needle whereby two sinkers are located between adjacent needles in each said group. 1 ",'
11. A circular knitting machine substantially as hereinbefore described with re drawings.