US2560872A - Knitting machine - Google Patents

Description

y 1951 J. JUTGLAR PARES EIAL 2,560,872

KNITTING MACHINE 2 Sheets-Sheet 1 Filed Oct. 1, 1946 y/W 174a ill M WW W K W J y 1951 J. JUTGLAR PARES EIAL 2,560,872

KNITTING MACHINE 2 Sheets-Sheet 2 Filed Oct. 1, 1946 Patented July 17, 1951 KNITTING MACHINE J os Jutglar Pars and Salvador Sindreu Daroca,

Barcelona, Spain Application October 1, 1946, Serial No. 700,564 In Spain December 7, 1945 2 Claims.

In the manufacture of meshed fabrics by the usual methods, whether with warping rectilinear or circular machines the needles used are either so-called hook needles forming a wide resilient hook which may be closed by the action of a press or closing element to pass the thread inside the last mesh formed or termed self-actor needles in which the hook is rigid but is provided with an articulated tongue which closes it at the suitable moment.

In 'both cases the needles require a relatively long stroke, and a considerable part of the needles lie outside the needle bar or the cylinder, with the result that twisting or deflection of the needles often takes place, with consequent inconveniences and imperfections in the cloth.

With our invention, the mesh fabric is knitted using short needles of greater rigidity and strength than the needles used at the present time, whilst both the travel of the needle and the part of the latter projecting from the bar or cylinder which guides it is considerably shorter than with the usual methods. For both these reasons, the deflection and deformation of the needles are practically completely avoided.

Our invention comprises arranging the needles with a part out in the form of an inclined plane at their extremities at the upper end of which is formed the hook of the needle, which is rigid and short. The body of the needle possesses, on the edge facing the hook, a channel or groove, which starts from the lower part of the inclined plane, and in which is introduced a part which forms a hook, and is the part used for retaining the mesh last formed, so that the hook of the needle, as the latter slides longitudinally, can pass through this mesh the thread which is to form the succeeding mesh.

The parts forming the hook for retaining the meshes may have different forms and arrangements, one of the simplest being to make them of stamped sheet metal, similar to the sinkers of the picking machines, but forming a small hook at the end. For this reason, in the present description, these parts will be designated by the general name of hook sinkers, although they do not require to have the exact forms of sinkers.

The needles slide longitudinally close to an extricating part which is fixed or movable, and which, in the case of a rectilinear machine, takes the form of an extricating bar, and in the case of a circular machine, the complete form of a cylinder similar to that of the present circular machines.

The hook sinkers, on their parts, are suitably guided in agreement with the groove of the needle, and are provided with a reciprocating movement in the same plane as the reciprocating movement of the needle. This movement of the hook sinker is much more limited than the movement of the needle, since its sole purpose is to catch the mesh last formed, to retain it until the needle has passed the thread through its interior, and then to let it go in order that this mesh can be extricated, passing over the needle and the extricating bar.

In the accompanying drawing are shown diagrammatically two ways of carrying out the method of manufacturing mesh fabric of our invention.

Figures 1 to 5 show on a scale several times larger than the natural size, the different positions assumed by the needle and the hook sinker with relation to the fixed extricating bar or mesh holding means, and the way in which the formation of the mesh is carried out, using a sinker whose hook is directed upwards and retains the mesh by an upward movement.

Figures 6 to 10 shown in similar fashion the formation of the mesh using a hook sinker which is actuated downwards for catching and retaining the mesh, for which purpose its hook is directed in downward direction.

In Figures 1 to 5, the numeral I represents the extricating bar or mesh holding means, which possesses a series of grooves 2 in which slide the needles 3. These needles are formed by plane rods of rectangular section and are provided at their upper part with a part 4 cut in the form of an inclined plane, the upper extremity of which forms the hook 5, which is rigid and has a width less than the total width of the needle 3.

In the lower part of the inclined plane 4 there commences a vertical groove 6 formed in the edge of the needle 3, this groove being of such a depth that its bottom is in vertical line with the point of the needle 5.

In combination with each of the needles 3 is used a hook sinker 1, which is assumed to be formed, for example, by a piece of metal sheet sufiiciently thin to be introduced into the slot 6, and the extremity of which forms a hook 8.

The extricating or mesh holding bar I is fixed; the needle 3 is provided with an ascending and descending movement, and the hook sinker 1 also has an ascending and descending movement but of smaller amplitude.

The manner of working of these elements and the formation of mesh fabric is as follows;

In the position shown in Figure 1, the meshed fabric is suspended from the needle 3 by its last 'mesh H and is applied against the inside face of the extricating bar I. The thread guide has just introduced the thread [2 into the hook 5 of the needle, and with the various elements in this position, the needle 3 commences to descend, and the hook sinker 'l rises slightly, as can be seen in Figure 2, with-which movement the =h0ok. 8 of the sinker l catches the mesh ll andretains it supporting at the same time the fabric I0.

As the needle 3 continues in its downward travel,, the hook 5, with the thread which itcarries, passes through the mesh H which is held bythe hook sinker l--8, the --latter descends,- as v can be seen in Figure 3, and lets go the mesh 1 I, the fabric being suspended from the thread l2 as may be seen in Figure 4. The needlefi then immediately re-ascends, as shown in Figure 5,

a new mesh 13 being thus formed, and when the needle has ascended to the position shown in Figure 1 the cycle of operations is repeated.

As may be seen from the preceding, the travelv In Figurest to 10 the method is the same as has just been described, with the single difference that the hook sinker ll has the hook di-. rected downwards and carries out the retention of the mesh H by a descending movement.

In'the position in Figure 6 the needle 3 is in its highest position, and the hook sinker IT has commenced to descendandhas caught the mesh H and retains it, as can be seen in Figure '7, during the descent of the needle 3. When the needle 3 has descended far enough to pass the thread I2 inside the mesh H, as can be seen in Figure 8, the hook sinker IT commences to rise andreleases the mesh H, thus forming a new mesh, which, when the needle rises, as can be seenin hook E8 of the sinker, as in Figure 1, and theop- .4 erations are repeated for the formation of a new mesh.

We claim:

1. A knitting machine comprising a reciprocating grooved needle having a shank with an inclined plane terminating in a hook, the open end of said hook being in alignment with the bottom surface of the groove in said needle, in combination with a hook-shaped sinker independent of said needle having a reciprocating movement of smaller amplitude than the movement of said needle, the hook of said sinker extending into the groove of said needle in order to engage a mesh formed onthe. needle and withdraw it therefrom to permit the formation of a new mesh by said needle and then release said first mesh and allow it to be cast off and said needle and said hook sinker are arranged substantially at right angles to one another.

2. A knitting machine comprisin a reciprocating grooved needle having a shankwithaninclined plane terminating in a hook, the-openyend, ofsaid hook being in alignmentwith the -bott9rn.

surface of the groove in said needle, in combin therefrom to permit the formation of a new mesh by said needle and then release said firstmesh: and allow it to be cast off, and the hook Ofsaid sinker being directed upwardly and engagin the mesh formed on the needle by an upward movement thus retaining the ,mesh' securely against the downward movement of the needle.

JOSE JUTGLAR PARES. SALVADOR SINDREU DARQCA.

REFERENCES CITED The o l w n f ren e o ec rd in the filev of this patent:

UNITED STATES PATENTS Number Name Date 53,224 House et al., Mar. 13,1865 1,385,929 Scott July, 26, 1 921;

Images