Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
  • D04B15/32—Cam systems or assemblies for operating knitting instruments
  • D04B15/34—Cam systems or assemblies for operating knitting instruments for dials
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/02—Pile fabrics or articles having similar surface features
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/10—Patterned fabrics or articles
  • D04B1/102—Patterned fabrics or articles with stitch pattern
  • D04B1/104—Openwork fabric, e.g. pelerine fabrics
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/22—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration
  • D04B1/24—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration wearing apparel
  • D04B1/26—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration wearing apparel stockings
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
  • D04B15/02—Loop-transfer points
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
  • D04B15/18—Dials
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
  • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
  • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
  • D04B15/78—Electrical devices
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
  • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
  • D04B35/04—Latch needles
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B9/00—Circular knitting machines with independently-movable needles
  • D04B9/12—Circular knitting machines with independently-movable needles with provision for incorporating pile threads
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B9/00—Circular knitting machines with independently-movable needles
  • D04B9/22—Circular knitting machines with independently-movable needles with provision for changing the fabric construction, e.g. from plain to rib-loop fabric

Definitions

• the present invention relates to the sector of circular knitting and hosiery machines and refers in particular to a circular machine for making socks and tights .
• Machines designed to produce terry knit are not able to perform transfer knit. At most, by interrupting production of the sock or tights and altering the structure of the machine one may obtain, in the same item tubular portions of terry knit and transfer stitch tubular portions. Clearly, this solution is technically and economically unprofitable so that in practice articles of this type are not produced.
• circular machines able to make, on the same round stitch, terry stitch and transfer stitches do not exist. Consequently, up to today hosiery items with terry parts alternating with transfer stitch parts on the same tubular portion, in other words along the circumference of the item, do not exist.
• the purpose of the present invention rather is to propose a circular knitting and hosiery machine making it possible to obtain a terry stitch and a transfer stitch on the same round stitch.
• figure 1 shows a view of the entire circular machine according to the invention
• figure 2 shows an enlargement of the machine at the top of the cylinder
• figure 3 shows a plan view of the machine at the top of the cylinder
• figure 4 shows a plan view of the machine at the yarn feed area
• figure 5 shows the detail- of a needle and respective punch
• figure 6 shows the detail of a sinker and relative selector actuator
• figure 7 shows two yarn-fingers and a sinker selected to form a terry stitch
• figure 8 shows two yarn-fingers and a sinker selected to form a transfer stitch with a bigger hole
• figures 9a-9d schematically represent the same number of transport phases of a stitch between two adjacent needles;
• figures 10 and 11 show two examples of portions of a sock according to the invention.
• figure 12 shows a portion of tights according to the invention.
• reference numeral 1 globally denotes a circular knitting and hosiery machine according to the invention. For greater clarity some parts relative to the structure of the machine have been omitted in figure 1.
• the machine 1 comprises a cylinder 10, on the external surface or mantle of which a number of longitudinal grooves are made for the needles 12 to slide along. According to one embodiment, the needles 12 are thrust upwards by jacks 16, or selectors, if necessary with intermediate elements 17 interposed.
• the needles 12 are provided at the top with a hook 13 and relative tab 13' and, considerably below these, of stitch retaining means.
• said stitch retaining means comprise a shoulder or crest 14 extending essentially horizontally.
• each needle has drop furrows 15 such as to permit the connection of inner and outer punches to form the transfer stitch.
• the selectors 16 are fitted with notches able to engage with the same number of cams 18 of a selector actuator 19, said cams 18 being individually activated depending on the pattern to be formed.
• an essentially circular shaped dial 20 is mounted, joined to its own rotation shaft 21.
• On the upper face of the dial 20 are a number of grooves which the inner punches 22 are slidably lodged.
• said grooves are not positioned in an exactly radial direction, but suitably inclined in the direction opposite that of rotation so as to constitute the envelope of a circumference.
• Such arrangement allows for more reliable functioning in that it determines an inclination of the inner punches particularly favourable to insertion of the needles in the furrows 15 while the stitches are being picked up.
• the inner punches 22 are provided with raised sections 23 destined to engage in a corresponding track 24 made on a cover 25 of the dial 20.
• Said track is fitted with cams 26, 26' which control the exit and return of said inner punches 22 (figure 3) .
• a satellite punch holder crown 30 is mounted on the same plane defined by the dial 20, but with opposite eccentricity to that of the dial.
• Outer punches 31 provided with raised sections 32 destined to engage in a corresponding track 33 provided on a cover 34 of the satellite crown 30 slide radially along it.
• Said track 33 is provided with a cam which controls the radial advancement and withdrawal of said outer punches 31.
• the cylinder 1 bears, at the top, a sinker holder crown 40 with radial grooves in which the sinkers 42 are placed so as to slide 42.
• the circular machine 1 is fitted with at least one electronic selector device 45 for selecting the sinkers 42 able to control the advancement in a radial direction of each single sinker, as will be described below.
• Each sinker has at least one selector heel 43.
• the electronic actuator is fitted with the same number of selector device or slides 46, as the number of selector heels of the sinkers.
• Each selector device is electronically drivable so as to act on a respective heel of the sinkers and make it shift radially towards the centre of the cylinder.
• each sinker 42 has an individual heel 43, adjacent sinkers having their respective heels positioned at different heights.
• the electronic selector devices 45 of the sinkers are fitted with a number N of driving means 46 positioned vertically in the shape of a comb above each other, able to be selectively activated.
• the sinkers are fitted with a single selector heel 43 so that N adjacent sinkers present their respective heels at different heights corresponding to the positions of the N driving means 46.
• Each sinker 42 is provided with a loop transfer plane 47 to form a plain stitch or transfer stitch (when the sinker is not selected) , and of an upper beak 48 to form a terry stitch or, as will be explained later a transfer stitch with a bigger hole (when the sinker is selected that is in the forward position) .
• each sinker has an upper notch 49 which, controlled by a relative cam, determines the normal radial shift of the sinkers.
• Both the cylinder 1, the dial 20, and the satellite crown 30, rotate at the same number of revs and in the same direction. According to one embodiment, their rotation is controlled by a single motor unit.
• Figure 3 shows, for example, the gears 50 transmitting movement to the outer punch holder satellite crown 30.
• the dial or outer crown need not necessarily be controlled by gears but may be driven by an independent motor and powered by its own actuator synchronised with the primary motor.
• FIG. 3 also shows, detached from each other, the centre 10' of the needle cylinder, the centre 24' of the dial track 24, and the centre 30' of the satellite crown 30.
• Figure 4 shows, seen from above, the main yarn feed fingers 54 and as an embodiment example, a yarn-finger for feeding an elastic yarn 56 and further yarn-fingers 57 for coloured yarns.
• the machine may be essentially divided into three separate operating zones, each about 120° broad. Starting from the position of the main yarn feed area, or drop zone, a first zone A, where the electronic sinker selector means 45 are positioned, is used for selection of the sinkers for formation of the terry stitch or the broadened transfer stitch, a second subsequent zone B, where the actuator selector devices of the needles 19 are positioned, is used to transport the stitch and is therefore bordered by a pick-up area and a dropping area, and a third subsequent zone C is used for any other operations such as the insertion of coloured yarns and/or threads or the so-called skipped or restrained yarn. [0039] In zone A the machine functions as follows. [0040] If the sinkers 42 are not selected by the electronic selector actuator, the normal formation of a plain or transfer stitch occurs, each yarn fed in by the main yarn-finger 54 falling on the loop transfer plane 47 of the sinkers.
• a processor unit programmed on the basis of the design of the item selectively commands one of the driving device or slide 46 to position itself, just before arrival of the sinker having a heel 43 in a corresponding position to said control body, in a position of interference with said heel.
• a subsequent sinker, having a selector heel at a different height to the previous, will be selected by a corresponding different driving device activated by the processor.
• the sinkers thus selected, take up a forward position in which, having previously suitably positioned at least a first yarn-finger 60 for the main yarn 61 and at least one second yarn-finger 62 for a terry yarn 63 (figure 7), the main yarn 61 rests on the loop transfer plane 47 while the terry yarn 63 rests on the upper beak
• the at least two yarn-fingers 60, 62 of main feed 54 are positioned at essentially the same height and close together (figure 8), so that all the yarns fed go to fall, if the sinkers are selected, on the upper beak 48 of these. If, in the subsequent area B of the machine, the needles corresponding to the selected sinkers are selected for the transfer stitch, a transfer stitch with a bigger hole is formed, that is the formation of a transfer stitch with bigger holes than usual occurs, the breadth of such holes being determined by the height of the upper beak of the sinker.
• special sinkers 42' may be used having an upper beak 48' higher than conventional sinkers, so as to accentuate the breadth of the hole of the transfer stitch (figure 8) .
• the punch then begins its horizontal exit movement. While the needle C is momentarily inactive, the punch inserts itself in the furrow and consequently also in the stitch. The needle C lowers itself, leaving the stitch in the punch (figure 9b) . After the needle C has completely lowered, the punch, on account of the misalignment of the outer punch holder crown or of the dial in relation to the cylinder, shifts towards a subsequent (or previous) needle D, which is momentarily inactive. The needle D then rises and inserts itself in the stitch transported by the punch (figure 9c) . The needle D continues to rise while the punch, with a horizontal return movement, leaves the stitch on the hook of the needle D (dropping area of the transfer stitch, figure 9d) .
• the furrows 15 of the needles 12 are formed of transversal grooves inclined in relation to the lateral surfaces of the said needles.
• zone B of the machine it is possible, by selecting the needles, to transfer the stitch or various stitches, respectively from one or more needles to the previous or subsequent needles, an operation which makes it possible to obtain a transfer stitch.
• the machine according to the invention makes it possible to achieve the following types of stitching.
• Figures 10 and 11 show two examples of a sock 70, 70' , on which it can respectively be seen on the same tubular portion, at least one area of coloured terry knit 71, 71' , at least one area of transfer stitch 72, 72' (with normal hole) , an area of base terry 73, and areas of plain knit 74.
• Figure 12 rather shows a portion of a pair of tights 80, on which it can be seen on the same tubular portion, areas of transfer stitch with normal holes 81 alternating with areas of transfer stitch with bigger holes 82.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Knitting Machines (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

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ID=40941847

Family Applications (1)

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Cited By (6)

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Citations (3)

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• 2008
  • 2008-09-29 IT ITBS2008A000176A patent/IT1391070B1/it active
• 2009
  • 2009-09-10 EP EP09736287A patent/EP2337885A1/en not_active Withdrawn
  • 2009-09-10 WO PCT/IB2009/053958 patent/WO2010035164A1/en active Application Filing
  • 2009-09-10 CN CN200980142899.8A patent/CN102203335B/zh not_active Expired - Fee Related

Patent Citations (3)

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