EP2664701B1 - Method for producing a knitted fabric with at least one float thread and fabric obtained therefrom - Google Patents

Description

Fleet threads, such as in the US 5,615,562 A described, usually used in technical knitted fabrics to influence the cross-elasticity of the knitted fabric in areas or in full knitted fabric. In medical knitted fabrics, a so-called weft thread is often used, which has different properties and strengths than the thread of the basic knitted fabric. These weft threads are always horizontal and are guided and held within a double-layer knitted fabric.

The US 5,765,400 A and the DE 196 05 002 A1 describe knitted fabrics with weft threads running horizontally. In one embodiment, these are floated over every second stitch on the visible side of the knitted fabric.

Similarly, the EP 681 045 A1 the insertion of weft threads into a knitted fabric by first transferring a few stitches and hanging them back after inserting the weft thread. The Weft thread is inserted over the entire width of the knitted fabric and floats only individual stitches on the visible side of the knitted fabric.

Fleet threads in knitted garments are also known, which are used as a design element. In the case of single-surface knitted fabrics, the floating threads are fastened in the knitted fabric by forming stitches or tuck handles, which presupposes that the thickness of the floating thread corresponds approximately to the fineness of the machine in order to be processed by the needles of the knitting machine.

The present invention has for its object to provide a method with which it is possible to produce a single-surface knitted fabric with flotation threads as design elements, in which the flotation threads differ significantly in thickness from the thickness of the thread of the basic knitted fabric and also over several stitches can be floated.

The object is achieved by a method for producing a knitted fabric with the features of claim 1.

With the method according to the invention, the float thread is thus held in it solely by being clamped between loops of the basic knitted fabric. There is no formation of tuck handles or stitches with the floating thread. For this reason, the strength of the flot thread can differ significantly from the thread with which the basic knitted fabric is formed. The method according to the invention therefore opens up new design options in particular.

The fleet thread guide is preferably designed as an intarsia thread guide. However, normal thread guides can also be used, with the aid of thread guide displacements in their effective areas can be spent. In addition, the use of independently driven thread guides is possible.

In a preferred embodiment of the method, steps b) to e) are repeated at least once after step f). The float thread is thus brought to a new starting position on the first knitted side, from which it should be visible on the second knitted side, and then another flotable thread region is created on the second knitted side. This creates different areas of the floating thread, in which the floating thread is visible either on the first knitted side or on the second knitted side. The float thread in step b) can be moved by the thread guide in the same direction or in the opposite direction as in the previous step d). If it is moved back by the thread guide, several superimposed areas of floating thread are created on the knitted sides. By moving in the same direction, several float areas are created side by side in the horizontal direction. By varying the length of the floating thread in the horizontal direction and the number of courses of the basic knitted fabric in step f), the angle at which the floating thread runs on the first knitted side can be changed. Flotate threads deviating from the horizontal direction are therefore also possible.

Of course, multiple threads can be inserted at different points in the basic knitted fabric. According to the method, these floating threads can also be inserted in such a way that they cross at least partially. The crossing can take place at the point of passage of the flotation threads from one knitted side to the other knitted side and / or on one or both sides of the knitted fabric.

In a further variant of the method, the basic knitted fabric can be formed from two partial knitted fabrics which are knitted adjacent to one another, and the two parts can be formed with at least one floating thread by transferring stitches in the edge region of both knitted parts and laying the floating thread over the strapped stitches on a plurality of knitted fabrics Positions of the knitted parts are connected. In this embodiment of the method, the two parts are sewn together, so to speak, by the floating thread, which runs alternately on the front and on the back of the knitted parts in their edge region. Of course, several floating threads can also be used for this process.

The at least one floating thread can have a different thickness and / or a different material than the thread of the basic knitted fabric. For example, fine leather strips can also be used as a floating thread. For technical textiles, the use of wire-like materials for the floating thread is also possible.

The floating thread can also be a bundle of threads, whereby further optical effects can be achieved. For example, several differently colored threads can be inserted into the knitted fabric as a colorful bundle of floating threads using the method.

The invention also relates to a knitted fabric with the features of claim 9.

The knitted fabric has a single-surface basic knitted fabric. The at least one float thread can have a different thickness, a different material and / or a different color than the thread or threads of the basic knitted fabric.

Various exemplary embodiments of knitted fabrics according to the invention and the methods according to the invention for their production are described in more detail below with reference to the drawing.

Fig. 1a

eine Ansicht eines ersten Gestrickstücks mit Flottfaden;

Fig. 1b

eine Fadenlaufdarstellung eines Verfahrens zur Herstellung des Gestricks aus Fig. 1a;

Fig. 2a

eine Ansicht eines zweiten Gestrickstücks;

Fig. 2b - Fig. 2d

eine Fadenlaufdarstellung eines Verfahrens zur Herstellung des Gestricks aus Fig. 2a;

Fig. 3a

eine Ansicht eines dritten Gestrickstücks mit Flottfaden;

Fig. 3b - Fig. 3d

eine Fadenlaufdarstellung eines Verfahrens zur Herstellung des Gestrickstücks aus Fig. 3a;

Fig. 4a

eine Ansicht eines vierten Gestrickstücks mit Flottfaden;

Fig. 4b + Fig. 4c

eine Fadenlaufdarstellung eines Verfahrens zur Herstellung des Gestrickstücks aus Fig. 4a;

Fig. 5a

eine Ansicht eines fünften nicht erfindungsgemäßen Gestrickstücks mit Flottfaden;

Fig. 5b + Fig. 5c

eine Fadenlaufdarstellung eines Verfahrens zur Herstellung des Gestrickstücks nach Fig. 5a;

Fig. 6

eine Ansicht eines sechsten nicht erfindungsgemäßen Gestrickstücks;

Fig. 7

eine Ansicht eines siebten nicht erfindungsgemäßen Gestrickstücks.

Show it:

Fig. 1a

a view of a first piece of knitted fabric with floating thread;

Fig. 1b

a thread run representation of a method for producing the knitted fabric Fig. 1a ;

Fig. 2a

a view of a second piece of knitted fabric;

Figures 2b-2d

a thread run representation of a method for producing the knitted fabric Fig. 2a ;

Fig. 3a

a view of a third piece of knitted fabric with floating thread;

3b-3d

a thread running representation of a method for producing the knitted piece Fig. 3a ;

Fig. 4a

a view of a fourth piece of knitted fabric with floating thread;

Fig. 4b + Fig. 4c

a thread running representation of a method for producing the knitted piece Fig. 4a ;

Fig. 5a

a view of a fifth piece of knitted fabric with floating thread not according to the invention;

5b + 5c

a thread running representation of a method for producing the knitted piece after Fig. 5a ;

Fig. 6

a view of a sixth piece of knitted fabric not according to the invention;

Fig. 7

a view of a seventh piece of knitted fabric not according to the invention.

Fig. 1a shows a knitted fabric 10, which consists of a single-surface basic knitted fabric 11, which in the example shown is a plain-right knitted fabric. In the basic knitted fabric 11, a floating thread 12 is inserted, which in a certain section in the x-direction of the basic knitted fabric 11 and over the entire height of the basic knitted fabric 11 on the visible side of the basic knitted fabric 11 in several, arranged one above the other and running obliquely from bottom left to top right Sections 13 can be seen. The width and the slope of the sections 13 are constant.

Fig. 1b illustrates the manufacture of the knitted fabric 10 Fig. 1a according to the principle. In the row R1, stitches are formed for the basic knitted fabric 11 on the needles D - M of the front needle bed in accordance with the desired number of stitch rows until the beginning of the floating thread insert. Furthermore, the floating thread 12 is fed from the right knitted edge by means of an intarsia thread guide. The float thread 12 is then moved to its starting position S in row R2 by moving the thread guide according to the desired width of the float thread region between the needles G and H of the front needle bed. The stitches of the needles H, I, J of the basic knitted fabric 11 are then transferred to the needles h, i, j of the opposite needle bed in row R3 in accordance with the desired width of the float area. In row R4 the floating thread 12 is countered in a length corresponding to the number of stitches transferred in row R3 of the feed direction from row R2 over the transferred stitches, before in row R5 the transferred stitches in row R3 are hung back on their original needles H, I, J of the front needle bed. This is followed by a renewed formation of stitch rows for the basic knitted fabric 11, the number of stitch rows determining the height and the angle of the sections 13 of the floating thread 12. The steps in the rows R2-R5 are then repeated in accordance with the desired number of sections 13 in the wale direction y of the knitted fabric 10.

Fig. 2a shows a knitted fabric 20 with a basic knitted fabric 21, which is also a plain-right knitted fabric. A float thread 22 is introduced into the basic knitted fabric 21. The sections 23.1-23n of the flotation thread 22 visible on the front of the basic knitted fabric 21 are provided with the same pitch, but have an increasing length in the y direction of the knitted fabric 20, the length increase on the left side of the sections 23.1-23. 23.n takes place.

The Figures 2b-2d illustrate the process for producing the knitted fabric 20. In row R1, the desired number of rows of stitches for the basic knitted fabric 21 are formed with the needles D-M of the front needle bed until the start of the floating thread insert is reached. The flotation thread 22 is fed from the right knitted edge until it has reached its starting point S between the needles I and J of the front needle bed (row R2). The stitches of the needles J, K, L of the front needle bed are then reassigned in row R3 to the opposite needles j, k, l of the rear needle bed, before in row R4 the float thread is placed from left to right over the stitched stitches and in row R5 the stitches transferred in row R3 are hung back on their original needles J, K, L. In row R6 several rows of stitches are again formed for the basic knitted fabric 21. In row R7 the float thread 22 is moved by its thread guide in its position between the needles L and M, which it has reached in row R4, up to a reversal point U1 between the needles H and I of the front needle bed. The stitches I - L of the basic knitted fabric are then reassigned to the needles of the rear needle bed in row R8, and then in row R9 the float thread 12 is placed over the slung stitches counter to the feed direction from row R7. In row R10 the stitches transferred in row R8 are hung back onto the original needles I - L of the front needle bed. In row R11 there is a renewed formation of stitch rows for the basic knitted fabric 21 on the needles D - M of the front needle bed in the same number as in row R6. In row R12, the floating yarn 22 is moved from its position between the needles L and M of the front needle bed to a second reversing position U2 between the needles G and H of the front needle bed. Then in row R13, a total of five stitches are transferred from needles H - L of the front needle bed to the associated needles h - L of the rear needle bed. After that, the floating thread is placed in row R14 over the looped stitches before they are hung back in row R15. These steps are repeated until the desired number of sections 23.n is reached.

Fig. 3a shows a knitted fabric 30 with a basic knitted fabric 31, in which a floating thread 32 is inserted. The flotation thread insert has been carried out in such a way that a plurality of obliquely running sections 33.1-33.n can be seen on the visible side of the knitted fabric 30. Sections 33.1 - 33.n continuously increase in length in the y direction of the knitted fabric. In contrast to that in Fig. 2a knitted fabric 20 shown here, however, the length increases on both sides.

The 3b-3d illustrate the production of the knitted fabric 30 according to the principle. In row R1, rows of stitches are formed for the basic knitted fabric 31 with the needles D - M of the front needle bed. The float thread 32 is fed from the right until it has reached its starting point S between the needles G and H of the front needle bed in row R2. The stitches of the needles H, I, J of the basic knitted fabric are then reassigned to the opposite needles h, i, j of the rear needle bed in row R3. Then, in the direction of movement, from left to right, the floating thread 32 is placed over the looped stitches before they are hung back in row R5. In row R6, the needles D-M are again used to form rows of stitches for the basic knitted fabric 31 on the front needle bed. In row R7, the floating thread is moved with the help of its thread guide to the reversal point U1 of the first section 33.1. Starting from the reversal point U1, i.e. starting from the needle G, five stitches are then reassigned to the rear needle bed and then the row thread is laid over these stitches in row R9, before the slung stitches in row R10 back to their original needles G - K des front needle bed to be hung back. In row R11 there are again the formation of courses in the same number as in row R6 for the basic knitted fabric 31. In row R12 the float is moved from the position between the needles L, M to its reversing position U2 between the needles E, F before the steps of the rows R3-R12 are repeated, the float area being widened on the left and right by one or more needles.

Fig. 4a shows a knitted fabric 40 with a basic knitted fabric 41 and a floating thread 42, the width of the basic knitted fabric 41 in the x direction, which is covered by the floating thread 42, in each case remaining constant. In In the y direction, however, the visible sections 43.1-43.n of the floating thread 42 vary in their pitch and thus also in their length.

The Fig. 4b and Fig. 4c illustrate the basic course of the method for producing a knitted fabric according to Fig. 4a . In row R1, stitches for the basic knitted fabric 41 are formed with the needles D-M of the front needle bed until the height position of the insert of the floating yarn guide 42 is reached, which is moved from the right knitted edge to the starting point S (row R2). The stitches of the basic knitted fabric of the needles H-L of the front needle bed corresponding to the desired width of the floating thread 43.1 are then transferred onto the needles h-1 of the rear needle bed in row R3. In row R4 the floating thread is guided in a length corresponding to the number of stitches transferred in row R3 against the feed direction from row R2 before the stitches of needles h-l are hung back on needles H-L in row R5. In row R6, rows of stitches for the basic knitted fabric 41 are again formed on the needles D - M of the front needle bed. In row R7 the floating thread is moved by its thread guide from its position between the needles L and M of the front needle bed to the left to the reversing position U1 of the floating thread between the needles G and H. Then the stitches of the basic knitted fabric on the needles H - L are reassigned to the opposite needles h - l of the rear needle bed and then the float in row R9 is moved from the reversal point U1 to the right as far as between the needles L and M of the front needle bed. Then the stitches transferred in row R8 are hung back in row R10. These steps are repeated, with different numbers of stitch rows each being formed for the basic knitting 41 when the basic knitting is formed in row R6, as a result of which the different slopes of the sections 43.1-43.n arise.

In Fig. 5a A knitted fabric 50 is shown, which has a basic knitted fabric 51, in which a floating thread 52 is also inserted. The float thread 52 is laid in the different sections 53.1 - 53.n in the form of a figure eight around the stitches of the basic knitted fabric 51, like that Fig. 5b and Fig. 5c clarify:
In row R1, rows of needles for the basic knitted fabric 51 are formed with the needles D-N and the float thread 52 is fed from the right. Then, in row R2, the stitches of the basic knitted fabric are transferred from the needles G, H, I according to the desired width of the left region of section 53.1 to the needles g, h, i of the opposite needle bed. In row R3 the floating thread is moved in the knitted fabric by moving the thread guide according to the desired width of the floating thread region between the needles F and G of the front needle bed. Then in rows R4 the stitches are hung from needles g, h, i back to needles G, H, I and at the same time the stitches of needles J, K, L are reassigned to the rear needle bed. Then in row R5 the float is moved in a length corresponding to the number of stitches transferred in row R4 against the feed direction from row R3. Then in rows R6, the stitches transferred in row R4 are hung back on their original needles J, K, L of the front needle bed. These steps are repeated until the desired number of sections 53.n is reached.

Fig. 6 shows a knitted fabric 70 which consists of two parts 70.1, 70.2 knitted side by side. The floating thread 72 is used here to connect the two knitted parts 70.1, 70.2 to one another. The float thread sections here run horizontally and parallel to one another on the visible side of the knitted fabric 70.

In Fig. 7 A further example of a knitted fabric 80 is shown, which consists of two basic knitted parts 80.1, 80.2, which are knitted side by side on a flat knitting machine and connected to one another by means of a floating thread 82. This is essentially what is related to Fig. 5 The method shown is applied, with the stitches being transferred around the edge of the knitted parts 80.1, 80.2.

Claims (10)

1. Method for producing a knitted fabric (10, 20, 30, 40, 50, 70, 80) with at least one floating thread (12, 22, 32, 42, 52, 72, 82) on a flat knitting machine with at least two needle beds, characterised by the steps:

   a) forming a single-surface basic knitted fabric (11, 21, 31, 41, 51, 70.1, 70.2, 80.1, 80.2) up to the stitch row in which the floating thread (12, 22, 32, 42, 52, 72, 82) is to be inserted;

   b) bringing the floating thread (12, 22, 32, 42, 52, 72, 82) into a starting position (S) on the first knitted fabric side with the aid of a thread guide, from which position (S) the floating thread (12, 22, 32, 42, 52, 72, 82) should be visible on the second knitted fabric side;

   c) transferring of several adjacently arranged stitches of a number that equals the desired width of the floating thread area visible on the second knitted fabric side, starting at the starting position (S) of the floating thread (12, 22, 32, 42, 52, 72, 82);

   d) laying the floating thread (12, 22, 32, 42, 52, 72, 82) over the re-hung stitches with the aid of the thread guide;

   e) hanging the transferred stitches back onto their original needles;

   f) forming stitch rows of the basic knitted fabric (11, 21, 31, 41, 51, 70.1, 70.2, 80.1, 80.2) of any number.
2. Method according to claim 1, characterised in that steps b) - f) are repeated at least once after step f).
3. Method according to claim 2, characterised in that the floating thread (12, 22, 32, 42, 52, 72, 82) is moved by the thread guide in the same direction or in the opposite direction during step b) as during the preceding step d).
4. Method according to one of the claims 1-3, characterised in that several floating threads (12, 22, 32, 42, 52, 72, 82) are inserted at different points of the basic knitted fabric (11, 21, 31, 41, 51, 70.1, 70.2, 80.1, 80.2).
5. Method according to one of the claims 1-4, characterised in that the floating thread or threads (12, 22, 32, 42, 52, 72, 82) cross each other at least in part.
6. Method according to one of the claims 1-5, characterised in that the knitted fabric (70, 80) is formed from two parts (70.1, 70.2; 80.1, 80.2) knitted next to each other, and the parts (70.1, 70.2; 80.1, 80.2) are connected with each other with at least one floating thread (72, 82) by re-hanging stitches in the edge area of both knitted fabric parts (70.1, 70.2; 80.1, 80.2) and laying the floating thread (72, 82) over the re-hung stitches in several overlaying positions of the knitted fabric parts (70.1, 70.2; 80.1, 80.2).
7. Method according to one of the claims 1-6, characterised in that the at least one floating thread (12, 22, 32, 42, 52, 72, 82) has a different thickness and/or consists of a different material than the thread of the basic knitted fabric (11, 21, 31, 41, 51, 70.1, 70.2, 80.1, 80.2).
8. Method according to one of the claims 1-7, characterised in that the at least one floating thread (12, 22, 32, 42, 52, 72, 82) is a thread bundle.
9. Knitted fabric (10, 20, 30, 40) with at least one floating thread (12, 22, 32, 42) and a single-surface basic knitted fabric, in which the floating thread (12, 22, 32, 42, 52) is visible on the first knitted fabric side up to a starting position (S), from which the floating thread (12, 22, 32, 42) runs on the second knitted fabric side; wherein the floating thread (12, 22, 32, 42) is visible on the first and second knitted fabric side and is held in the starting position (S) by means of clamps between stitches of the basic knitted fabric (11, 21, 31, 41), characterised in that the floating thread (12, 22, 32, 42) runs on the first knitted fabric side whilst forming an angle to the stitch rows across the knitted fabric (10, 20, 30, 40), which depends on the length of a floating thread section inserted on the second knitted fabric side in stitch row direction, and on the number of stitch rows formed between neighbouring starting positions (S).
10. Knitted fabric (10, 20, 30, 40) according to claim 9, characterised in that the at least one floating thread (12, 22, 32, 42) has a different strength, colour and/or a different material than the thread of the basic knitted fabric.

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