FR2732983A1 - JACQUARD KNIT OBTAINED ON A CIRCULAR KNITTED CEMENT TRIM - Google Patents

Abstract

The Jacquard knitwear, produced in three or four colours on a circular machine with gathered stitches, has rear face which is destructured in relation to a conventional finish by de-gauging two needles out of four and thus dividing the number of columns of stitches and their density by two. The knitwear surface finish can be produced by selecting one needle from four alternately, dividing by two the number of rows and, consequently, the density of the stitches on the rear face.

Description

1i 2732983

  JACOUARD KNIT OBTAINED ON A CIRCULAR TRADE

KNITTED COTS.

  The present invention relates to an improvement made to Jacquard knits made on a circular loom with double-needle plucked mesh used in particular as seat upholstery materials, walls ..., in particular in the lining sector of the interior.

of vehicles.

  It relates more particularly to a new type of knit obtained

  on a circular knitting machine, double needle.

  Such knitting machines consist essentially of a horizontal plate and a vertical cylinder, one of these elements, generally the cylinder (also called vertical needle), which allows the needles to be selected according to a predetermined rhythm according to drawings that we

wish to achieve.

  The horizontal bed or tray has a combined cam path as for Interloc trades, able to select the needles so that each row of the reverse side, made with the wire forming the face side, is obtained on two successive falls. As a result, when a three-color Jacquard is produced, each row of knits is made by making a selection of the drawing to the cylinder, so that all the needles work to make a knitting row which is therefore made from three falls, while the back which is knitted on the needles of the tray has a structure such that each row formed with the same threads as those forming the drawing is made on two successive falls, this

  which causes a density of this upside down 1.5 times that of the place.

  In the case of Jacquard four colors, each row is made from four falls, the back made with the needles of the tray is always made on two successive falls, which leads, in such a case, to a row density of mesh on the back double of that obtained on the place. This higher density on the back than on the place, poses a number of problems, especially with respect to the holding of the knit when making, each mesh of the reverse side is smaller so more fragile, and increases the risks of probability that during

  sewing, the needle deteriorates a stitch.

  Now it has been found, and this is the subject of the present invention, that it was possible to produce three or four-color Jacquard knits, which make it possible to solve this problem, the article obtained having the same density. upside down in the case of a four-color Jacquard and, in the three-color Jacquard, a

  density equal to 0.75 times that of the place.

  In general, the new three or four-color Jacquard knit according to the invention is characterized in that the knitting armor for producing the reverse side is unstructured with respect to a

conventional armor.

  According to a first embodiment, the destructuration is obtained by scaling the craft two needles out of four, thereby dividing by two the number of columns of stitches on this face and

  so in two the mesh density.

  According to another embodiment, the armor of the plate is made by selecting in staggered fashion one needle out of four, making it possible to halve the number of rows, thus also the density of

mesh by two.

  Such a staggered selection of needles can be achieved by carrying the armor of the tray on four cam paths. It could also be envisaged to make such a selection by means of a

  Jacquard system associated with the plateau.

  The invention and the advantages it brings will however be better understood thanks to the exemplary embodiments given below by way of indication but not limitation, examples illustrated by the appended diagrams which are conventional graphical representations of double Jacquard knitwear.

  needle, the cylinder being referenced (C) and the plate (P).

  In these diagrams, Figures 1 and 2 illustrate the structure of a knit

  Jacquard three and four classic colors.

  Figures 3, 4, 5 and 6 illustrate four Jacquard knits made according to the invention, Figures 3 and 4 corresponding to a three-color Jacquard knit and Figures 5 and 6 to a four-color Jacquard knit. Referring to Figures 1 and 2, it is found that to achieve a conventional Jacquard three or four colors, that the work of the son is

the following.

  To the cylinder, to realize the drawing, the needles are selected so that the falls (1,2,3) give a row, and the falls (4,5,6)

a second row.

  On the reverse side, made with the hands of the plate, we see that the falls (1) and (2) would give a row, (3) and (4) a second

  row, (5) and (6) a third row.

  As a result, the density of the reverse side is one and a half times

  greater than that of the front panel.

  According to the invention, it is possible to obtain a rebalancing of the front and back faces, either by carrying out a planing destructuration at the plate of one needle out of two (FIGS. 3 and 6), or by performing the knitting on the plate with only four

  cam tracks or Jacquard selection (Figures 4 and 5).

  Figures 3 and 4 illustrate the structure of a three Jacquard knit

  colors obtained according to the invention.

  In the embodiment illustrated in FIG. 3, it can be seen that the falls (1, 2, 3) give a row to the cylinder and the falls (4, 5, 6) a

second row.

  With regard to the backside made on the plateau, the falls (1) and (2) give a first row, (3) and (4) a second row, (5) and (6) a

third row.

  Such an article presents, compared to that illustrated in FIG.

  columnar density divided by two.

  FIG. 4 illustrates the rebalancing of a knit by table knitting destructuration with four cam paths or by selection

Jacquard.

  In such a case, the armor ratio is twelve falls, four rows to the cylinder forming the face Jacquard face corresponding to

  only three rows on the board.

  FIG. 5 illustrates a four-color Jacquard knit made in accordance with the invention, the reverse-face destructuring being obtained by knitting on the plate on four cam tracks or by

Jacquard selection.

  In such a case, the falls (1,2,3 and 4) give a row to the cylinder and also a row to the plate, the mesh density being therefore

  identical on the back and the place.

  FIG. 6 illustrates, for its part, the production of a four-color Jacquard, the destructuration of the backside of which is obtained by planing the plate of one needle out of two. In such a case, the falls (1,2,3,4) give a row to the cylinder, the falls (1) and (2) giving in turn a first row to the plateau and the falls (3) and (4) a

second row.

  In such a case, there are two rows of knit on the reverse side corresponding to a single row to the cylinder, but the density of this reverse side is however identical to the previous example given the fact

  that the number of columns of meshes is divided by two.

Claims (4)

  1 / Jacquard knit three or four colors obtained on a circular loom with gathered stitches, characterized in that the knitting armor for making the reverse side is destructured compared to a conventional armor. 2 / jacquard knit according to claim 1, characterized in that the destructuration of the back side is obtained by scaling the craft two needles out of four, thus dividing by two the number of columns of   mesh on this face and therefore also by two the mesh density.   3 / jacquard knit according to claim 1, characterized in that the armor of the plate is made by selecting in staggered one needle out of four, causing a division by two of the number of rows on the reverse side and consequently a mesh density by two. 4 / Jacquard knit according to claim 3, characterized in that the staggered selection of the needles is performed on four cam paths. Jacquard knit according to claim 3, characterized in that the staggered selection of the needles for carrying the armor of the tray is   obtained through a Jacquard system.