GB1600671A

GB1600671A - Manufacturing knitted fabrics

Info

Publication number: GB1600671A
Application number: GB15930/78A
Authority: GB
Original assignee: Elitex Zavody Textilniho; Elitex Koncern Textilniho Strojirenstvi
Current assignee: Elitex Zavody Textilniho; Elitex Koncern Textilniho Strojirenstvi
Priority date: 1977-05-12
Filing date: 1978-04-21
Publication date: 1981-10-21
Also published as: SU1049587A1; CS202687B1; IT1095120B; DD135982A3; IT7823239A0; ES469544A1; DE2818506C2; DE2818506A1

Description

(54) MANUFACTURING KNITTED FABRICS (71) We, ELITEX - KONCERN TEX TILNÍHO STROJiRENSTVf, of 22 Bozeny Nemcove, Liberec, Czechoslovakia, a Corporate Body organised and existing under the laws of Czechoslavakia do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- The present invention relates to manufacturing knitted fabrics, particularly panties, in two cylinder circular knitting machines.

According to one aspect of the present invention there is provided a method of manufacturing knitted fabrics in two cylinder circular knitting machines provided with at least two feeds and sliders by means of which double-ended needles can be transferred between and operated in either one of the two cylinders, comprising knitting in one feed a loop course from a combination consisting of face, reverse and tuck loops and knitting in the following feed a loop course from a combination consisting of face and reverse loops in such a manner that each wale consists of at least face and reverse loops.

According to another aspect of the present invention there is provided a two cylinder circular knitting machine comprising sliders by means of which double-ended needles can be transferred between and operated in either one of the two cylinders, the sliders having operating and patterning butts, and pattern jacks controlled by patterning drums and cooperating with the sliders, the machine having at least two feeds in at least one of which feeds in at least one cylinder a pair of cams is provided for cooperation with the operating butts of the sliders, one of the cams of the pair being provided to cooperate with the operating butts of the sliders to move needles held by the sliders into the clearing position and the other one of the cams of the pair being disengageable and being provided to cooperate with the operating butts of the sliders to move needles held by the sliders into the tucking position when the said other cam is engaged and the selection of the sliders for cooperation of their operating butts with either of the cams of the pair being effected through the pattern jacks.

An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which: Fig. 1 represents a knitted structure made during five revolutions of the needle cylinders in a two cylinder circular knitting machine with three feeds in operation.

Fig. 2A to 2E show diagrammatic distributions of needles in both the upper and lower needle cylinder by means of operative sliders, in view of forming separate loop wales; Fig. 3 shows a further knitted structure formed during five revolutions of the needle cylinders in a three feed two cylinder circular knitting machine, which is performed with loop patterning; Figs.4to4E show diagrammatic distributions of needles into both the upper and lower needle cylinder upon knitting separate loop wales in each revolution of the needle cylinders in a structure as shown in Fig. 3; Fig. 5 shows a further knitted structure formed during five revolutions of the needle cylinders in a two feed two cylinder circular knitting machine;; Figs. 6A to 6E show diagrammatic needle distributions in the needle cylinders during five revolutions upon forming a structure as shown in Fig. 5; Fig. 7 shows the arrangement of the cam system in a two cylinder circular knitting machine provided with three feeds and patterning devices in each of the feeds, and the needle control means arranged in the needle grooves of the lower needle cylinder.

A two cylinder circular knitting machine is provided with oppositely arranged, not represented needle cylinders and three feeds 1, 2, 3 (Fig. 7). In the not represented needle tricks of the lower needle cylinder are arranged displaceably control means consisting of operating sliders 4 provided with operating putts 5, and patterning butts 6. The said operating butts 5 follow upon advancement in the cam system in the direction of arrow P path G, or possibly in the second and third feed 2, 3, path G1. The lower ends of said operating sliders 4 cooperate with jacks 7, which are also provided with control butts 8, performing a motion along path Q upon passing through the cam system. In the upper part, said jacks 7 are provided with known teeth 9.Below the jacks 7 are also displaceably mounted patterning jacks 10 provided with control butts 11, a set of patterning butts 12 and auxiliary butts 13 in the lower part.

The form of needles used in two cylinder circular knitting machines is commonly known and therefore not represented in a detailed manner. The needles are shown in Figs. 2A-2E, 4A-4E and 6A-6E only diagrammatically and denoted by reference number 14.

The cam system which surrounds from the outer side the lower needle cylinder, is provided with lower cams 15 (Fig. 7) with a contact plane 15a for the selection of patterning jacks 10 in the first feed 1 for patterning and a contact surface 15b for the links-links selection. Above these lower cams 15 are arranged into sets the patterning levers 16, which co-operate with patterning butts 12 of patterning jacks 10 and not represented, known patterning drums, thus securing the selection of needles for patterning. Above these sets of patterning levers 16 are arranged upper cams 17, which are destined for co-operation with the upper ends of patterning jacks 10.The control butts 8 of jacks 7 are guided in the space between the lower cams 18 and the upper cams 19, and ahead of the space of first feed 1, a cam 20 is arranged for securing the operation of transfer of needles from the lower needle cylinder to the upper needle cylinder.

Between the upper cams 19 for jacks 7 and the set of segment cams 21 arises a space in which shifters 22, 23 are disengageauly arranged, according to a programme given e.g. by means of a control drum, for the purpose of controlling patterning butts 6 of operating sliders 4. The operating butts 5 of operating sliders 4 are guided in the first feed 1 in such a manner that the needles associated therewith are in the clearing position, and by contacting the central stitch cam 24 in the direction of arrow P, the sliders 4 are retracted to guide said butts 5 on to the stitch cam 25 where the sliders 4 are further retracted.Behind said stitch cam 25 in the direction of arrow P follows in the second feed 2 the lower rising cam 26 and the upper rising cam 27, while the lower disengageable rising cam 26 is followed by tucking cam 28, further a sinking cam 29 and a displaceable stitch cam 30 of the second feed 2.

In an analogous manner as the lower needle cylinder, the upper needle cylinder is equipped as well with a cam system. The needles operating in this upper needle cylinder are also controlled by means of not represented operating sliders. The patterning butts of the operating sliders in the upper needle cylinder are guided by system 32 of cams and shifters 33 and 34 ahead of the first feed 1 and shifters 35, 36 in the second feed 2. The operating butts of operating sinkers are guided upon passage through the first feed 1 and the auxiliary cam 38, the stitch cam 39 of the first feed 1 and the clearing cam 40 which is already part of the following second feed 2. Behind is already arranged stitch cam 41 of this second feed 2.

Patterning jacks 10 in the second feed 2 are selected by contact surface 42 on the lower cams 15 and for the following third system 3 by a further contact surface.

The patterning butts 6 of operating sliders 4 pass, upon passage through the third feed 3 below a disengaged shifter 44, while a further shifter 45 is operative, thus securing also the rising of said patterning butts 6. In that third feed 3, the operating butts 5 of the operating sliders 4 are guided on the basis of selection by the associated patterning device either about the lower rising cam 46 or the upper rising cam 47, behind which in the direction of arrow P are arranged the tuck cam 48, the sinking cams 49, 50 and stitch cam 51 of the third feed 3. Behind said cams, rising cam 52 is arranged.

In the first feed is arranged a disengageable shifter 53v, which is disengaged upon rotary knitting and is put into operation only upon reciprocating knitting, as e.g. upon knitting a heel or toe part of a hosiery knitwork.

The patterning butts of not represented operating sliders which are arranged in the upper needle cylinder, are controlled in the third feed 3 by shifter 54, while the operative butts are controlled by clearing cam 55, stitch cam 56 and following clearing cams 57, 58.

The perfect operation of needles in the separate feeds 1, 2, 3 is secured also by means of known guides 59, 60, 61 for needle latches.

It is desirable that two cylinder circular knitting machines, which are destined for knitting patterned goods, should have the broadest possible extent of pattern forming.

One of these possibilities is also that of forming meshes with floats. For that ur- pose the lower rising cam 26 in second feed 2 and the lower rising cam 46 in third feed 3 are arranged disengageably. That means that by disengaging these cams 26, 46 in said feeds, meshes with floats can be formed.

An exemplary embodiment of the struc ture by means of the specified device and according to a predetermined pattern upon forming a links-links knitwork, is shown in Fig. 1. Upon each revolution A, B, C, D, E of the needle cylinders, independent mesh courses I, II, III are formed from yarns in the first feed 1 (Fig. 7), second feed 2 and third feed 3, and mesh wales a, b, c, d, e, (Fig. 1). From the viewpoint of structure according to Fig. 1, in the course of this knitting are formed reverse stitches Y, face stitches X and tuck stitches Z. For better understanding, in Figs. 2A to 2E, 4A to 4E and 6A to 6E are used directing symbols H, which mean that the diagrammatically shown needles 14 are in operation in the upper needle cylinder, and S, which means that needles 14 are operative in the lower needle cylinder.This distinction is also used in relation to the forming of independent loop wales a, b, c, d, e.

For the purpose of forming tuck loops Z (Figs. 1, 3 it is decisive which operating butts 5 (Fig. 7) of operating sliders 4 are guided with needles operating in the lower needle cylinder upon passage through the second feed 2 and the third feed 3 in the tucking position G1 of path G.

An exemplary embodiment of the structure as shown in Fig. 5 is formed by means of two feed knitting, usually in a two cylinder circular knitting machine provided with two feeds on similar principles as in structures shown in Figs. 1 and 3.

The operation of the machine specified above for making the exemplary embodiments of structures showing high extensibility is substantially as follows: Upon rotary knitting, the needle cylinders rotate in the direction of arrow P and in the separate feeds 1, 2 and 3 are fed yarns into the needle hooks, forming loop courses I, II, III. Upon making the structure as shown in Fig. 1, needles 14 for forming separate loop wales a, b, c, d, e are distributed into the upper needle cylinder H and the lower needle cylinder S during the separate revolutions A, B, C, D, E in the following manner: Upon the first revolution A, needle 14 forms a loop wale a in the upper needle cylinder H, the appurtenant needles for loop wales b, c, d are in the lower needle cylinder S and the needle for the loop wale e is again in the upper needle cylinder H.This distribution is apparent from the diagrammatic representation in Fig. 2A. Upon this first revolution A, independent loop courses I, II, III are formed of the yarns. In view of that upon this revolution A none of the needles 14 operating in the lower needle cylinder S was selected by the patterning device of the second feed 2 or the third feed 3 in such a manner that the operating butt 5 of operating sinkers 4 attached to those needles 14 should be controlled by a lower disengageable rising cam 26 of the second knitting feed 2 or the lower rising cam 46 of the third knitting feed 3, no operating butt 5 performed a motion about path G1. Therefore, reverse stitches Y were formed in the loop wale a, face stitches X in loop wales c, d and finally, a reverse stitch Y again in loop wale e.In the following revolution B, a new distribution of needles 14 is performed in such a manner as shown in Fig. 2B. That means that the loop wales a, b are formed on needles 14 operating in the lower needles cylinder S. The loop wale c is formed by needle 14 operating in the upper cylinder H and finally, loop wales d, e are formed on needles 14 operating again in the lower needle cylinder S.Upon this revolution B the patterning device of the second knitting feed 2 and the third knitting feed 3 select needles 14, forming loop wales b, d, and operating in the lower needle cylinder S in such a manner that the attached operating sliders 4 are not lifted by means of jacks 7 and attached patterning jacks 10 to such level that the operating butt 5 of said operating sliders 4 should get into contact with the rising cam 27 of second feed 2 and the upper rising cam 47 of third system 3. Thus, operating butts 5 remain in the lower level and contact the lower rising cams 26, 46 of the second feed 2 and third feed 3, and thereafter also the tucking cams 28, 48, thus performing path G1. Consequently, tuck loops 2 are formed of yarns fed in the second feed 2 and in the third feed 3.This selection of the patterning device remains also during the further revolutions C, D, even when upon each of said revolutions C, D a change in the distribution of needles 14 from the upper needle cylinder H to the lower needle cylinder S takes place, as can be seen from the diagrammatic representations in Figs. 2C and 2D. It also follows from the above that the forming of tucking loops Z in the loop wales b, d remains unchanged. Only in the separate revolutions and thus also in the separate loop courses is changed the arrangement of face loops X and reverse loops Y by three loop courses I, II, III formed of yarns and following one another.

In a similar manner is formed the structure as shown in Fig. 3, in which the separate tucking loops 2 are formed dispersed, in accordance with the selection of needles 14 for patterning. The distribution of needles 14 into the upper needle cylinder H and the lower needle cylinder S for forming the separate loop wales a, b, c, d, e, in the separate revolutions A, B, C, D, E is apparent from Figs. 4A to 4E.

WHAT WE CLAIM IS: 1. A method of manufacturing knitted fabrics in two cylinder circular knitting machines provided with at least two feeds

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. ture by means of the specified device and according to a predetermined pattern upon forming a links-links knitwork, is shown in Fig. 1. Upon each revolution A, B, C, D, E of the needle cylinders, independent mesh courses I, II, III are formed from yarns in the first feed 1 (Fig. 7), second feed 2 and third feed 3, and mesh wales a, b, c, d, e, (Fig. 1). From the viewpoint of structure according to Fig. 1, in the course of this knitting are formed reverse stitches Y, face stitches X and tuck stitches Z. For better understanding, in Figs. 2A to 2E, 4A to 4E and 6A to 6E are used directing symbols H, which mean that the diagrammatically shown needles 14 are in operation in the upper needle cylinder, and S, which means that needles 14 are operative in the lower needle cylinder.This distinction is also used in relation to the forming of independent loop wales a, b, c, d, e. For the purpose of forming tuck loops Z (Figs. 1, 3 it is decisive which operating butts 5 (Fig. 7) of operating sliders 4 are guided with needles operating in the lower needle cylinder upon passage through the second feed 2 and the third feed 3 in the tucking position G1 of path G. An exemplary embodiment of the structure as shown in Fig. 5 is formed by means of two feed knitting, usually in a two cylinder circular knitting machine provided with two feeds on similar principles as in structures shown in Figs. 1 and 3. The operation of the machine specified above for making the exemplary embodiments of structures showing high extensibility is substantially as follows: Upon rotary knitting, the needle cylinders rotate in the direction of arrow P and in the separate feeds 1, 2 and 3 are fed yarns into the needle hooks, forming loop courses I, II, III. Upon making the structure as shown in Fig. 1, needles 14 for forming separate loop wales a, b, c, d, e are distributed into the upper needle cylinder H and the lower needle cylinder S during the separate revolutions A, B, C, D, E in the following manner: Upon the first revolution A, needle 14 forms a loop wale a in the upper needle cylinder H, the appurtenant needles for loop wales b, c, d are in the lower needle cylinder S and the needle for the loop wale e is again in the upper needle cylinder H.This distribution is apparent from the diagrammatic representation in Fig. 2A. Upon this first revolution A, independent loop courses I, II, III are formed of the yarns. In view of that upon this revolution A none of the needles 14 operating in the lower needle cylinder S was selected by the patterning device of the second feed 2 or the third feed 3 in such a manner that the operating butt 5 of operating sinkers 4 attached to those needles 14 should be controlled by a lower disengageable rising cam 26 of the second knitting feed 2 or the lower rising cam 46 of the third knitting feed 3, no operating butt 5 performed a motion about path G1. Therefore, reverse stitches Y were formed in the loop wale a, face stitches X in loop wales c, d and finally, a reverse stitch Y again in loop wale e.In the following revolution B, a new distribution of needles 14 is performed in such a manner as shown in Fig. 2B. That means that the loop wales a, b are formed on needles 14 operating in the lower needles cylinder S. The loop wale c is formed by needle 14 operating in the upper cylinder H and finally, loop wales d, e are formed on needles 14 operating again in the lower needle cylinder S.Upon this revolution B the patterning device of the second knitting feed 2 and the third knitting feed 3 select needles 14, forming loop wales b, d, and operating in the lower needle cylinder S in such a manner that the attached operating sliders 4 are not lifted by means of jacks 7 and attached patterning jacks 10 to such level that the operating butt 5 of said operating sliders 4 should get into contact with the rising cam 27 of second feed 2 and the upper rising cam 47 of third system 3. Thus, operating butts 5 remain in the lower level and contact the lower rising cams 26, 46 of the second feed 2 and third feed 3, and thereafter also the tucking cams 28, 48, thus performing path G1. Consequently, tuck loops 2 are formed of yarns fed in the second feed 2 and in the third feed 3.This selection of the patterning device remains also during the further revolutions C, D, even when upon each of said revolutions C, D a change in the distribution of needles 14 from the upper needle cylinder H to the lower needle cylinder S takes place, as can be seen from the diagrammatic representations in Figs. 2C and 2D. It also follows from the above that the forming of tucking loops Z in the loop wales b, d remains unchanged. Only in the separate revolutions and thus also in the separate loop courses is changed the arrangement of face loops X and reverse loops Y by three loop courses I, II, III formed of yarns and following one another. In a similar manner is formed the structure as shown in Fig. 3, in which the separate tucking loops 2 are formed dispersed, in accordance with the selection of needles 14 for patterning. The distribution of needles 14 into the upper needle cylinder H and the lower needle cylinder S for forming the separate loop wales a, b, c, d, e, in the separate revolutions A, B, C, D, E is apparent from Figs. 4A to 4E. WHAT WE CLAIM IS:

1. A method of manufacturing knitted fabrics in two cylinder circular knitting machines provided with at least two feeds

and sliders by means of which double-ended needles can be transferred between and operated in either one of the two cylinders, comprising knitting in one feed a loop course from a combination consisting of face, reverse and tuck loops and knitting in the following feed a loop course from a combination consisting of face and reverse loops in such a manner that each wale consists of at least face and reverse loops.

2. A two cylinder circular knitting machine comprising sliders by means of which double-ended needles can be transferred between and operated in either one of the two cylinders, the sliders having operating and patterning butts, and pattern jacks controlled by patterning drums and cooperating with the sliders, the machine having at least two feeds in at least one of which feeds in at least one cylinder a pair of cams is provided for cooperating with the operating butts of the sliders, one of the cams of the pair being provided to cooperate with the operating butts of the sliders to move needles held by the sliders into the clearing position and the other one of the cams of the pair being disengageable and being provided to cooperate with the operating butts of the sliders to move needles held by the sliders into the tucking position when the said other cam is engaged, and the selection of the sliders for cooperation of their operating butts with either of the cams of the pair being effected through the pattern jacks.

3. A method of manufacturing knitted fabrics in two cylinder circular knitting machines, substantially as hereinbefore described with reference to the accompanying drawings.

4. A two-cylinder circular knitting machine, substantially as hereinbefore described with reference to the accompanying drawings.