GB2146050A

GB2146050A - Production of panty hose

Info

Publication number: GB2146050A
Application number: GB08421076A
Authority: GB
Inventors: Werner Nessmann; Josef Glorius; Guntner Reiche; Stanislav Cermak
Original assignee: Elitex Zavody Textilniho; Elitex Koncern Textilniho Strojirenstvi
Current assignee: Elitex Zavody Textilniho; Elitex Koncern Textilniho Strojirenstvi
Priority date: 1983-09-02
Filing date: 1984-08-20
Publication date: 1985-04-11
Also published as: GB8421076D0; IT1237350B; DE3430635A1; IT8422478A0; GB2146050B; CS636883A1; CS239284B1; DD220056A1

Abstract

Panty hose are knitted on a double cylinder knitting machine with two feeds, the two leg parts being knitted separately and with optimum shape adaptability of the panties part. During one revolution, in the seat portion of the panties part (Fig. 4) at one knitting feed tuck loops are formed on one cylinder and at the other knitting feed tuck loops are also formed in the opposed cylinder. In the front portion of the panties part (Fig. 3) rib and plain stitches x, z are formed at one knitting feed, while tuck loops are formed in the other feed in the upper or lower needle cylinder. Alternatively the latter feed may also form knitted stitches. To perform said method, each feed has a cam to raise needle jacks into either a clearing or a tuck position and said cams respectively control either only the lower or only the upper needle jacks. <IMAGE>

Description

SPECIFICATION Production of panty hose This invention relates to a method of production of panty hose and to a device to perform said method in a double cylinder circular small diameter knitting machine which is provided with at least two knitting feeds.

The panty hoses are up to now produced on double cylinder circular small diameter knitting machines so that two leg parts are knitted and then they are cut in the panties part and to obtain required extensibility they are sewn together with an additional, separately knitted, inserted portion.

In this way produced panty hoses are designed especially for children, said panty hoses show satisfactory fashioning of the panties parts, but their production is expensive as to the time and material, because it is necessary to knit one more inserted portion and to sew it in, which requires an additional seam.

Except of mentioned economical disadvantages, the seams are visible when wearing such panty hoses, which is aesthetically disturbing and which reduces the quality of appearance of such panty hoses. Another method of knitting children panty hoses on double cylinder circular small diameter knitting machines was developed, said method reduced the material and time expenses so that there is no inserted portion sewn into the panties part and this eliminates also one seam.

The subject matter of said method consists in that in the panties part in one knitting feed one stich row is knitted which consists of a combination of rib, purl and tuck stitches, while said stitches are in the following feed knitted into a stich row comprising rib and purl stiches knitted from a separate yarn. Said method of knitting a panty hose on double cylinder circular small diameter knitting machines is suitable especially in the case when a continuously patterned fabric is knitted and the patterning device is in operation throughout the whole course of knitting.

A disadvantage of said method consists in that in fact better extensibility of the panties part is obtained, but nevertheless it does not meet fully all requirements. Moreover, said extensibility is divided uniformly in the whole panties part, which does not ensure optimum fashioning of the panties part of the panty hose.

This disadvantage is especially apparent in the seat portion of the panties part, where there are still higher requirements on the panties extensibility than in the opposite front portion of the panties part.

The object of this invention is to eliminate the above mentioned shortcomings.

The object of this invention is further to give a method of production of panty hose consisting of two leg parts and having an optimum shape adaptability in the panties part, as well as to give a device to perform said method, presenting a series of patterning possibilities with minimum requirements for the design space, said device being applicable on existing double cylinder circular small diameter knitting machines, According to one aspect of the invention there is provided a method of production of a panty hose on a double cylinder circular small diameter knitting machine provided with at least two knitting feeds, wherein during one revolution of the needle cylinders, in the seat portion of the panties part from the yarn of one knitting feed tuck loops are formed and from the yarn of the other knitting feed in the opposed needle cylinder also tuck loops are formed, further in the front portion of the panties part from the yarn of one knitting feed rib or purl stitches are formed, while from the yarn of the other knitting feed tuck loops are formed, or in said front portion from both fed yarns rib and purl stitches are formed.

According to another aspect of the invention there is provided a device to perform the above method on a double cylinder circular small diameter knitting machine provided with at least two knitting feeds, wherein each of the knitting feeds is provided with at least one cam to raise the upper and lower needle jacks into a clearing and tuck position, while said cams of each knitting feed are arranged alternately to control either only the lower needle jacks or only the upper needle jacks.

An embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a schematic illustration of a panty hose consisting of two leg parts connected in the panties part in the place of the crutch by a seam; Figure la is a side view of a panty hose showing individual portions constituting the panties part; Figure 2 is a schematic plan of a panties part of a panty hose with illustrated seam and parting line; Figure 3 illustrates the structure in the front portion of the panties part, which is formed during three revolutions of the needle cylinders in a double cylinder circular small diameter knitting machine with two feeds in operation;; Figure 4 illustrates the structure in the seat portion of a panties part, which is formed during three revolutions of the needle cylinders of a double cylinder small diameter circular knitting machine with two feeds in operation; Figure 5 shows the arrangement of the cam system of a double cylinder small diameter circular knitting machine with two feeds; and Figure 6 shows the needle jacks arranged in the grooves in the lower and upper needle cylinders of a double cylinder small diameter circular knitting machine which are the means controlling the knitting needles.

The panty hose consists of two leg parts 1,2 (Figure 1) which are connected in the panties part 3 by a seam 4. The line A-A (Figure 2) divides the panties part 3 into the front portion 5 and the seat portion 6. Further the panties part 3 is divided from individual leg parts 1,2 by an imaginary parting line K (Figure la). The front portion 5 of the panties part 3 consists up to the parting line C-C of alternating purl stitch wales L and rib stitch wales R. Purl stitch wales L consist of purl stitches Z and rib stitch wales R consist of rib stitches X with a tuck loop.The seat portion 6 (Figure 1a) of the panties part 3, where a higher extensibility is required, is then formed beginning from the parting line C-C also by alternating purl stitch wales L (Figure 4) and rib stitch wales R, said wales consisting of purl stitches Y with a tuck loop and a rib stitches X with a tuck loop.

A double cylinder small diameter circular knitting machine is provided with known, not shown, needle cylinders and with two knitting feeds I, II (Figure 5). In the first knitting feed I in the not shown hooks of the knitting needles is fed the yarn P (Figure 3) and in the second knitting feed II the yarn Pii. The not shown knitting needles are controlled in the lower needle cylinder by the lower needle jacks 7 (Figure 6) which are provided with working butts 8 and patterning butts 9.

Under said needle jacks 7 there are arranged other controlling means, e.g. intermediate jacks 10 which are in the upper part provided with guiding butts 11 and with working butts 12 located under the guiding butts 11. Further under the intermediate jacks 10 (according to the type of used double cylinder small diameter circular knitting machine) there may be arranged e.g. for the reason of patterning, further not shown patterning jacks. In the upper needle cylinder, the needles are controlled by the upper needle jacks 13, which are also provided with working butts 14 and patterning butts 15.

During rotation of the needle cylinders in the direction S, the guiding butts 11 of the intermediate jacks 10 are guided by the cam ring 16. In the place of the first knitting feed I the cam 17 performs in a known way selection of the knitting needles for the 1:1 set-out. Above the cam ring 16 there is another cam ring 18. Between the cam ring 16 and the cam ring 18 there is a radial cam 19 which controls the patterning butts 9 of the lower needle jacks 7. Above the radial cam 19 there is a raising cam 20 which controls the working butts 8 of the lower needle jacks 7, which pass through the track A until they reach the central lowering cam 21 and the stitch cam 22, which are also arranged above the cam ring 18. In the second knitting feed II, between the cam ring 16 and the cam ring 18 there is a radial cam 23, which is in the raising cam provided with a recess for the tuck position.Radial cam 23 co-operates with a raising cam 25, which is provided with a recess for the tuck position, and then in the direction of rotation of the needle cylinder there are the central lowering cam 26 and stitch cam 27 to control the working butts 8 of the lower needle jacks 7.

Radial cam 29 arranged in the cam ring 28 serves to control the upper needle jacks 13 in the first knitting feed I, it guides the working butts 14 of the upper needle jacks 13 through path B to the first fixed raising cam 30. Further there is the guiding cam 31 which serves to transfer the knitting needles, the cam being provided with horizontal recess 32 which enables to obtain the tuck position Bu in the path B. Normal to cam 17 above the cam ring 28 there is arranged a radial counter cam 33.

Out of it above the cam ring 28 there is a radial cam 34 which controls the patterning butts 15 of the upper needle jacks 13. Raising edge of radial cam 34 is followed by the guiding cam 35 arranged under the cam ring 28, and stitch cam 36 which control the working butts 14 of the upper needle jacks 13.

In the second knitting feed II there is arranged a radial cam 37 and behind it a raising cam 38 and another radial cam 39. After the radial cam 39 there follows a stitch cam 40.

Knitting needles forming the front portion 5 of the panties part 3 are associated with the upper needle jacks 13 which are provided with long patterning butts 15. Knitting needles forming the seat portion 6 of the panties part 3 are associated with the upper needle jacks 13 which are provided with short patterning butts 15.

Selection of the needle jacks 13 takes place in the first knitting feed I by the radial raising cam 41 arranged in the place of the cam ring 28.

Panties part 3 of the panty hose is formed according to the invention on a double cylinder circular small diameter knitting machine provided with two knitting feeds in the following way. The needle cylinders rotate in the direction of the arrow S and the butts of the upper needle jacks 13 and of the lower needle jacks 7 are guided by fixed cam system. The lower needle jacks 7 move in the path A when passing through both knitting feeds I, II. The upper needle jacks 13 move in the path B when passing through the knitting feeds I, II. The knitting needles associated with individual lower and upper needle jacks 7,13 are in this case in 1:1 set-out.

This set-out of the knitting needles is carried out by the cam 17 which acts upon the working butts 12 of intermediate jacks 10. Intermediate jacks 10 are provided with short and long working butts 12.

Intermediate jacks 10 provided with long butts raise in co-operation with the lower needle jacks 7 the knitting needles into the upper needle cylinder.

Short working butts 12 of the intermediate jacks 10 are not engaged by the cam 17 and miss it. The associated knitting needles remain in the lower needle cylinder and are controlled by the lower needle jacks 7. In the first knitting feed I the hooks of the knitting needles receive the yarn P,. In the second knitting feed 11 the same knitting needle hooks receive another yarn Pii. In consequence then during each revolution of the needle cylinders from said yarns Pi, Pn two stitch rows in the front portion 5 of the panties part 3 are formed, and one stitch row in the seat portion 6 of the panties part 3 is formed. Knitting needles which are in action in the lower needle cylinder form the rib stitches and the knitting needles which are in action in the upper needle cylinder form the purl stitches Z. During knitting the seat portion 6 of the panties part 3 the set-out of the needles in the lower and in the upper cylinders remain without change and therefore a fabric consisting of alternating purl stitch wales L and rib stitch wales R is being formed.

The front portion 5 of the panties part 3 may be principally formed in two structural modifications.

The most simple modification consists in that the knitting needles of this half of the needle cylinder do not form tuck loops in the first knitting feed I and in the second knitting feed II. Consequently a fabric is formed in which alternate, e.g. with 1:1 set-out, a rib stitch wale R containing rib stitches and a purl stitch wale L containing purl stitches Z.

Still higher extensibility in the front portion 5 of the panties part 3 can be obtained by the structure shown in Figure 3. Stitches are formed in one of both knitting feeds I, II. In the exemplary embodiment in the second knitting feed II from the yarn PII of the second knitting feed purl stitches Z and rib stitches X with tuck loops are formed, because the knitting needles during their passage through the second knitting feed II are moved into the raising position Ax for tucking due to the location of radial cam 23. In the first knitting feed I purl stitches Z and rib stitches from the yarn Pi of the first knitting feed are formed, because the radial raising cam 41 raises the knitting needles by means of long working butts 14 of needle jacks 13 into the clearing position.

In another not shown example in the front portion 5 of the panties part 3 there may be another combination of stitches consisting of purl stitches Y with tuck loop and rib stitches. Said front portion 5 of the panties part 3 shows an extensibility corresponding with the extensibility obtained in the structure shown in Figure 3, but to form said combination of stitches a different adjustment of radial cam 23,41 or different lengths of working butts 8,14 of the needle jacks 7,13 are necessary.

Said course of revolutions Oi, 02, 03, etc. of the needle cylinder repeats as long as the level marked by the parting line K is reached.

To obtain required extensibility of described panty hose it is necessary to use in case of exemplary set-out of knitting needles 1:1 such an arrangement of cams which enables to form tuck stitches in one of the knitting feeds when knitting leg parts 1,2 and front portion 5 of the panties part 3.

Due to known reasons given by the shape of a human body, a high extensibility in the seat portion 6 of the panties part 3 is required, which is obtained so that during knitting said seat portion 6 of the panties part 3 the rib stitch wales R alternate with the purl stitch wales L. Said stitch wales form rib stitches X with tuck loop (Figure 4).Such combination of stitches with tuck loops is obtained so that the short patterning butts 15 of the upper needle jacks 13 used to form the seat portion 6 of the panties part 3 in a certain zone of the needle cylinder miss the radial raising cam 41 and the short working butts 14 of the upper needle jacks 13 are guided by the recess 32 in the guiding cam 31 into a tuck position By. It means that in the first knitting feed I rib stitches are formed from the yarn P, of the first knitting feed by the upper knitting needles.

The yarn Pll of the second knitting feed II is fed into the second knitting feed II and the upper knitting needles form purl stitches from it and the lower knitting needles form tuck loops from it, because the knitting needles working in the lower needle cylinder move in the path A, while due to the recess in the raising cam 25 and due to the adjustment of the radial cam 23, said knitting needles move in the second feed II in the raising position Ax for tucking.

Claims

1. Method of production of a panty hose on a double cylinder circular small diameter knitting machine provided with at least two knitting feeds, wherein during one revolution of the needle cylinders, in the seat portion of the panties part from the yarn of one knitting feed tuck loops are formed and from the yarn of the other knitting feed in the opposed needle cylinder also tuck loops are formed, further in the front portion of the panties part from the yarn of one knitting feed rib or purl stitches are formed, while from the yarn of the other knitting feed tuck loops are formed, or in said front portion from both fed yarns rib and purl stitches are formed.

2. Method according to Claim 1, wherein the panties part in its front and seat portions is formed with 1:1 set-out of knitting needles.

3. Device to perform the method of production according to Claims 1 and 2 on a double cylinder circular small diameter knitting machine provided with at least two knitting feeds, wherein each of the knitting feeds is provided with at least one cam to raise the upper and lower needle jacks into a clearing and tuck position, while said cams of each knitting feed are arranged alternately to control either only the lower needle jacks or only the upper needle jacks.

4. Device according to Claim 3, wherein the cams of both knitting feeds are provided with recesses corresponding with the tuck positions.

5. Method of production of a panty hose on a double cylinder circular small diameter knitting machine provided with at least two knitting feeds, substantially as hereinbefore described with reference to the accompanying drawings.

6. Device to perform a method of production of a panty hose on a double cylinder circular small diameter knitting machine provided with at least two knitting feeds, substantially as hereinbefore described with reference to the accompanying drawings.