Abstract: Provided is a knitting method and a knitting mechanism, and a circular knitting machine, in which in jacquard or semi jacquard knitting using a circular knitting machine, welt stitching is avoided so as to prevent the breakage and overlapping of yarns and filaments. According to the present invention, only needles selected for knitting and needles selected for tucking perform stitching, and needles selected for welting are prevented from performing stitching by a deactivation method, and thus the needles selected for welting do not perform stitching, so that the load on old loops can be suppressed, and breakage and overlapping of yarns and filaments can be prevented.

Abstract: A circular knitting machine for hosiery or the like, which comprises at least one needle cylinder which has a vertical axis and on the lateral surface of which there are axial slots. Each of these axial slots accommodates a needle (106) and an actuation element (110) for the needle (106) which can engage, with one of its ends, the needle (106) arranged in the same axial slot. The needle (106) or the actuation element (110) is provided with a fixed heel (103a), which protrudes radially from the axial slot, and a movable heel (104a) which can be extracted radially on command from the axial slot. Actuation cams are arranged around the needle cylinder and can be engaged by the fixed heels (103a) and by the movable heels (104a) in the extracted position. The machine can perform the usual knitting of known types of machine despite having an actuation cam set which has an extremely small number of actuation cams which can move for activation or deactivation, or none at all.

Abstract: A sinker (1) for a circular knitting machine contains a shaft (2) with a recess (11) in which a selection element (12) provided with a controllable raising butt (20) is mounted swivellably and can be swivelled to and fro between a position in which the raising butt (20) is retracted into the recess (11) and a position in which the raising butt (20) projects upwards over the upper side of the shaft (2). A spring (21), which can be attached to the selection element (12) or the shaft (2), serves to pre-tension the selection element (12) into one of these two positions (FIG. 1). In addition, a selection device is provided for selecting the sinker (1) in accordance with a pattern.

Abstract: The invention relates to Jacquard selection in a textile machine characterized by a selection jack (1) provided with a spring (M1) by which, after the preselection phase in which the jacks are guided by a cam inside the cylinder, they move out under the pressure of the spring, thus modifying the path or the functions; or remain contained and/or retained in the cylinder by a selector and/or other member disposed frontally which prevents their moving out. According to circumstances, the selector, even if fixed, can move vertically, horizontally and also radially, with minimum time and space, without lateral impact on the incoming butts and/or jacks. Finally, the actuators, together with the cams of the jacks and/or needles, are incorporated in a modular support to modify the type of selection and/or for textile operations other than the Jacquard type.

Abstract: A needle selection device in a circular knitting machine, including: needles which are slidingly accommodated in grooves formed in a needle holder and which have pivoting levers provided with heels; needle actuation cams facing the needle holder and forming a path which can be engaged by the heels of the needle levers as the needle holder moves with respect to the needle actuation cams in order to make the levers follow the path for actuation of the corresponding needle along the corresponding groove of the needle holder parallel to the longitudinal extension of the needle, and for each needle the lever oscillates about its pivoting axis, from an active position, in which its heel protrudes from the corresponding groove of the needle holder so as to engage the path formed by the needle actuation cams, to an inactive position, in which its heel is inserted in the corresponding groove of the needle holder in order to avoid engaging the path formed by the needle actuation cams; a reset element acting on the leve

Abstract: A device for needle-by-needle selection in circular stocking knitting machines is disclosed. An elastic lock pin or segment (19) is provided for each lower needle (13) of the type having an elastic deflection tail. The segment is carried by a crown (22) fixed with the cylinder and usually in a position shifted downwards away from the tail of the lower needle. A thruster (20) is provided under the lock segment, which can be moved upwards and is intended to deflect the lock segment (19) up to the level of interception with the tail of the lower needle (13). This results in a locking of the lower needle in the deflected, inoperative position. A selection electromagnet (21) is provided which can be activated and deactivated according to a program to hold or release the lock segment. The activation/deactivation keeps the inoperative lower needle locked or releases it because it is moved towards the outside into the operating position.

Abstract: An electromagnetically-operating Jacquard control device has an electromagnet (1) with a magnetic core (3), an armature (8) and a limit stop (14) for each controlling element (16) to be controlled. The limit stop can optionally be brought into the movement path of a hook (18) attached to the controlling element (16). Two lovers (5, 11) are provided, the first bearing the armature (8) and the second bearing the limit stop (14). These two levers are coupled to one another with positive engagement such that the forces are transmitted substantially perpendicularly to the plane formed by the limit stop (14) and the swivel pin (12) of the second lever (11). This enables wear-related incorrect operation to be avoided.

Abstract: A shed forming device for selecting a shed forming apparatus with the assistance of piezoelectric bending elements in a weaving and/or knitting machine of the jacquard type intended for weaving and knitting patterns. The shed forming device includes complementary ascending and descending hooks and complementary ascending and descending blades adapted to cooperate and mutually hook and unhook. Each of the piezoelectric bending elements has a U-shaped clip at a free extremity thereof having one arm (17) that is adapted to slide over a corresponding one of the hooks. Each of the complementary hooks is attached to an elastic bending spring part which can slide up and down along a groove under the action of one of the ascending blades in order to raise a tackle and also a harness cord.

Abstract: The selector has a lower extension for retention by a fixed magnetic selection ring associated with a needle cylinder, and an upper shaped elastic portion for returning the lower portion of the selector towards the outside of a needle cylinder. A flat or inclined profile is defined uppermost on the selector for engagement with a correspondingly flat or inclined base of a sub-needle. A guide portion, having a longitudinal extension lying substantially parallel to the shaped elastic portion, is connected to the shaped elastic portion and is engageable with helical springs used for retaining selectors in needle cylinder grooves. The selector has an upper heel protruding therefrom at an opposite side with respect to said guide portion, and a lower heel extending parallel to the upper heel for engagement with a lifting cam.

Abstract: In a textile machine, in particular in a knitting machine, with controlla working elements and an arrangement for selecting the working elements, the working elements are held in their initial position by a holding magnet and are selectively released from their initial position by an electromagnetic control system. In order to obtain a textile machine with a simple design, capable of being driven at high working speeds but in a reliable and safe manner, at least one holding magnet is rigidly fixed to the part of the textile machine that carries the working elements. A direct contact between the working elements and the moving control system is thus avoided, so that a contactless selection of the working elements is made possible.

Abstract: A selection device for an elastic selector for needles in a circular knitting machine which includes, in an upward region, an elastic portion that is adapted to move the lower portion towards the outside of the cylinder and has a lower heel that is adapted to move outward into a position for engagement on the part of a lifting cam; the selector continues, in a downward region, with a tab that is adapted to be attracted and retained by a fixed annular permanent magnet which is arranged towards the inside of a cylinder and at which one or more electromagnets are mounted; the activation of the electromagnets is adapted to selectively release the selectors which are otherwise retained by the permanent magnet during the rotation of the cylinder.

Abstract: A selecting mechanism for a circular knitting machine, including a hollow base, which holds pairs of selecting jacks at different elevations, and a selecting jack pushing-up device detachably fastened to the hollow base to hold pairs of pushing-up plates, wherein each pushing-up plate has a nose turned about a respective pivot between two alternative positions for controlling the positions of the pairs of selecting jacks for a full-stitch, half-stitch, or plain-stitch operation.

Abstract: A circular knitting machine of elastic needle type provided with a cam for flexing all the needles into their trick before they are raised to seize the feed yarn, in which the selection between those needles to be maintained flexed and those needles to be allowed to return to their normal configuration is made by axially slidable sliders positioned below each needle contained in the tricks.

Abstract: A circular interlock knitting machine of the interlock butting type including jacquard knitting includes a rotating cylinder having cylinder needles movable between welt, tuck and knit positions, dial needles movable between welt and knit positions along paths of travel which intersect the paths of the cylinder needles, and a needle selection and operating mechanism for the cylinder needles which prevents collision between cylinder and dial needles including an intermediate jack beneath each cylinder needle, a lower jack beneath each intermediate jack, the lower jacks being selectively movable between operative and non-operative positions, lower jack raising cam means for raising the lower jacks in the operative position from the bottom position to the welt position, intermediate jack raising cam means selectively movable between operating and non-operating positions for engaging, when in operating position, and raising from the welt position to the tuck position only those intermediate jacks raised by the se

Abstract: A circular knitting machine having a needle selection device and a device for axially shifting needles which has an axially movable cam. The axially movable cam defines a contour and is movable to three levels corresponding to a knitting position, a tuck position, and a float position. The device is arranged in correspondence with the feed stations of a circular knitting machine, such that butts of needles not moved into operation by jacks traverse the contour of the axially movable cam. The contour raises the needles not moved into operation by the jacks with a substantial delay with respect to other needles moved into operation by the jacks under control of the needle selection device.

Abstract: Disclosed is a knitting needle driving mechanism of a jacquard knitting machine for driving knitting needles by using piezo-electric elements in which a rear end portion of a piezo-electric body is movably supported in a groove of a supporting body or a housing, a front end portion of the piezo-electric body is movably connected to a rear end portion of a finger which is arranged so as to be aligned with the piezo-electric body and supported at the rear end portion thereof by the supporting body or the housing, and an intermediate portion between the front end portion and the rear end portion of the piezo-electric body is inserted into a rotatable member rotatably mounted on the supporting body or the housing. This knitting needle driving mechanism is small in size, high in response speed and prolonged in lifetime.

Abstract: In order to carry out the three-position selection of needles, that is, for floated stitch, retained stitch and discharged stitch, in either direction of rotation of the needles cylinder of a circular knitting machine with alternate motion for the production of socks with inlay patterns a cylinder is provided with needles and underneedles, and with pusher jacks provided with a heel (7,8) at both ends and engaged to a rear, centrifugal action spring. Two oscillating selectors vertically superimposed and symmetrically disposed with respect to the horizontal separation line are provided. Two electromagnets are provided vertically superimposed for the selection of said oscillating selectors. Such selection apparatus it is possible to reduce the diameter of the needles cylinder to less than 4" with a fineness above 120 needles and to work at a speed higher than the one presently allowed.

Abstract: In a multiple system circular knitting machine having an electromagnetic needle selection, the needle and jack cam races are supported on a stationary support ring which rests on a plurality of radially directed and mutually spaced ribs. To improve operational reliability and maintenance of needle selection devices, each selection electromagnet is mounted at an end portion of an elongated holder and is situated in a circumferential recess in the needle cylinder opposite end portions of respective selecting jacks. The magnet holders are adjustably secured to the lower surface of the support ring. The needle selecting cams include a pair of circumferentially staggered and axially superposed pressing cams of which the leading lower pressing cam first engages the lower end portion of the selecting jack and moves the same radially inwardly to a point where the upper pressing cam takes over and presses an armature surface of the end portion of the jack against an electromagnet.

Abstract: In a knitting machine, a needle selector having jacks fitted respectively in needle grooves formed in one of a cylinder, a dial and a needle bed is provided. A jack groove cam has a raising cam face for moving the jacks along their respective axes. A control electromagnet is arranged in facing relation to one of the jacks at a yarn feeding position on a stationary side. The control electromaget is excited in response to a needle-selecting signal to attract the jack to bring its butt into engagement with the raising cam face. A jack holding cam is arranged in juxtaposed relation to the other rocking end of the jack at the yarn feeding position. The jack holding cam has a cam face which is so magnetized as to attract the jack toward the jack groove cam. A welt cam is arranged at such a position as to clamp the jack between the cam face of the jack holding cam and a cam face of the welt cam, which is magnetized to attract the jack.

Abstract: This device for the selection of the needles comprises a selector accommodated below a needle in a same groove of a needle bed of the machine. The selector is controllably movable from an extraction position, in which a heel thereof protrudes from the groove to engage with selection cams facing said needle bed, to a sunk position, in which the heel is accommodated in the groove so as to not engage with the selection cams. Between the selector and the bottom of the groove an elastic element is interposed which keeps the selector in the extraction position and a sinking cam is provided, rigidly associated with the selection cams, which causes the passage of the selector from the extraction position to the sunk position in contrast with the elastic element. A rod is engageable with the elastic element to keep the selector in the sunk position and actuators controllably act on the rod to cause disengagement thereof from the elastic element so as to obtain the passage of the selector to the extraction position.

Abstract: A knitting machine with stitch-forming knitting needles which are actuated by pattern bars and which are adjustable in accordance with the three-way technique to three operating positions, i.e., the knitting, floating and tucking positions, comprises electromagnetic selector means which are controlled in accordance with a pattern to adjust the knitting needles to their operating positions and also eccentric steering means which cooperate with these selector means. Arranged in each pattern bar are two displaceable selector elements which are biased by a spring and which are adjustable by cooperation of the electromagnetic selector means and the spring so as to be brought in accordance with a pattern or combination into the path of steering cam means trigger displacement of the selector elements and hence pivotal motion of the pattern bar in accordance with the desired operating position.

Abstract: In a knitting machine, a needle position control device comprises knitting needles each having five butts, of which one is fixed and the four others are secured in pairs to two needle latches mounted for oscillation in two recesses formed in the stem of the needle. A selection mechanism acts on the latches so as to move one or the other of their two respective butts out of the guide trick of the needle. By means of this combination of butts, the motion of the needle in the three knitting positions is constantly controlled in both directions of motion of the needle, by moving out two of the three butts. Another embodiment comprising a single latch can give the same result for two knitting positions.

Abstract: For a multi-feed knitting machine or hosiery machine, the system of selection of the needles is equipped, per each thread feed, with at least a stationary electromagnetic actuator, suitable for acting by magnetic attraction on wire springs incorporated inside selection sinkers inserted inside the slots under the needles and the needle pushers. An extraction cam extracts the selection sinkers and the needle pushers coupled with them from the slots, in order to bring the heels of the needle pushers to interfere with a lifting cam. A loading cam brings the springs of the sinkers into contact with the face of the actuator, wherein they are retained by magnetic force. A narrow area of the face of the actuator can be de-magnetized by impulses emitted by an electronic control system. If this area is demagnetized, the springs of the sinkers are taken by a blanking-out cam, which pushes the sinkers into their relevant slots and the heels of the needle pushers out from the field of action of the lifting cam.

Abstract: Methods for circular weft knitting of variegated articles and selectively programmable circular weft knitting machine apparatus for carrying out such methods including means for effecting selective, controlled two dimensional displacement of compound needle member components and associated sinker elements so as to provide each such needle member with the selectable capability of performing a knit, tuck or float operation at each yarn feed location independent of the direction of knitting needle approach thereto.

Abstract: The needle selection device includes a pair of vertically arranged needle selection units in advance of each yarn feeding and knitting station with one of the needle selection units being operable to select needles to knit and welt positions and the other of the selection units being operable to select needles to tuck and welt positions. The vertically arranged selection units correspond and cooperate with corresponding upper and lower selector jacks positioned beneath each knitting needle. The operation of the needle selection units is carried out along a single vertical selection line in advance of each knitting station. The vertical arrangement of the needle selection units and the selection along the single vertical line permits the knitting stations to be closely spaced adjacent to each other and permits a greater number of knitting stations to be positioned around the needle cylinder, thereby increasing the production rate of the knitting machine.

Abstract: A circular knitting machine for hosiery includes an electromagnetic needle selection system. This selection system includes pivotal selector devices which act on resilient pushers and which are pushed indiscriminately or selectively against the resilient action of the pushers by radially acting cams. The system also includes groups of electromagnets which are placed annularly around the cylinder to exert a retaining effect on the selected cams when they are pushed against these by radially acting cams. In addition, electromagnets are placed between adjacent retaining electromagnets and they are of a size not exceeding the gap between the needles and the adjacent jacks. The jacks are excited selectively by means of a program control in order to exert the same retaining action as the retaining electromagnets and to effect abandonment or relinquishing of a selector which is moving.

Abstract: Improved methods for circular weft knitting of variegated articles and selectively programmable circular weft knitting machine apparatus for carrying out such methods including means for effecting selective, controlled two dimensional displacement of compound needle member components and associated sinker elements so as to provide each such needle member with the selectable capability of performing a knit, tuck or float operation at each yarn feed location independent of the direction of knitting needle approach thereto.

Abstract: Methods for circular weft knitting of variegated diversiform and articles and selectively programmable circular weft knitting machine apparatus for carrying out such methods including controlled two dimensional displacement of compound needle member components and associated sinker elements so as to provide each such needle member with the selectable capability of performing a knit, tuck or float operation at each yarn feed location independent of the direction of knitting needle approach thereto.

Abstract: The device includes a canal having a narrowing entry and a widening outlet, separated by the poles of a pair of opposing electromagnets, and in which selective means, or selectors, are shifted. Two substantially identical, geometrically and magnetically symmetrical selector stations are provided. The entry and the outlet of the canal include a magnetic adherance system, functioning alternately as a stabilizer and as an amplifier of movement, following the direction of the device shifting in relation to the selectors to be selected.

Abstract: A selection mechanism for knitting machines in which each raising jack for lifting the needles is associated with a pusher jack which is placed opposite the poles of an electromagnetic array during each selection cycle. This array either holds the pusher jack, whereby it is held out of the scope of action of cams which apply it against the corresponding raising jack or does not hold it, so that said pusher jack is selected by one of the above cams. The holding or non-holding of the pusher jack is determined by a program unit which selectively energizes the coils of the electromagnetic array.