US3416471A - Yarn tensioning apparatus for tufting machines capable of making pile fabrics with repeat patterns thereon of loops of varying lengths - Google Patents

Yarn tensioning apparatus for tufting machines capable of making pile fabrics with repeat patterns thereon of loops of varying lengths Download PDF

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Publication number
US3416471A
US3416471A US610988A US61098867A US3416471A US 3416471 A US3416471 A US 3416471A US 610988 A US610988 A US 610988A US 61098867 A US61098867 A US 61098867A US 3416471 A US3416471 A US 3416471A
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Prior art keywords
yarn
bar
loops
pattern
cylinder
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Expired - Lifetime
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US610988A
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English (en)
Inventor
Ellison Ronald
Pickles Norman
Pritchard John
Taylor Lawrence
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Ellison Tufting Machinery Ltd
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Ellison Tufting Machinery Ltd
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C15/00—Making pile fabrics or articles having similar surface features by inserting loops into a base material
    • D05C15/04—Tufting
    • D05C15/08—Tufting machines
    • D05C15/26—Tufting machines with provision for producing patterns
    • D05C15/32—Tufting machines with provision for producing patterns by altering the loop length

Definitions

  • YARN TENSIONING APPARATUS FOR TUFTING MACHINES CAPABLE OF MAKING FILE FABRICS WITH REPEAT PATTERNS THEREON OF LOOPS OF VARYING LENGTHS Filed Jan. 25, 1967 4 Sheets-Sheet 4 "F G. 67' E 33 United. States Patent 3,416,471 YARN TENSIONING APPARATUS FOR TUFT- ING MACHINES CAPABLE OF MAKING PILE FABRICS WITH REPEAT PATTERNS THEREON 0F LOOPS OF VARYIN G LENGTHS Ronald Ellison, Norman Pickles, John Pritchard, and
  • the present invention concerns tufting machines for producing carpets and like pile fabrics.
  • An object of the present invention is to provide improved device for controlling the patterning of such fabrics.
  • the tuf-ting machine for making carpets and like fabrics With a repeat pattern thereon of loops of varying length has a yarn tensioning device including individual yarn tensioners one for each yarn in the machine, and pneumatic means for actuating pistons bearing against the yarn in a plurality of such tensioners equal to the number of repeats of the pattern.
  • a tufting machine draws a plurality of yarns from a creel, these yarns being each passed through a first hole in a metal bar mounted transversely on the machine and parallel to the line of entry of the needles into the backing fabric.
  • Each hole is connected to a second hole extending at right angles thereto, and the second hole carries a small piston-like metal member, preferably cylindrical, with one end rounded ofl? or chamfered; alternatively a ball may be used.
  • This piston member is free to slide in its hole and the lower end rests on its associated yarn in the first hole.
  • the upper end is subject to pressure from an air supply delivered to it by a branched pipe, the other branches of the pipe running to pistons acting on yarns located in places such that they form repeat patterns on the base fabric.
  • Each branched pipe may also be connected to a valve controlling a supply of compressed air thereto, these valves being in turn controlled by sensing devices such as photocells and amplifiers, the photocells co-operating with a pattern member moved synchronously with the backing fabric, the member carrying a pattern to be reproduced several times in the width of the carpet.
  • the sensing devices and pattern member may have action reversing means associated therewith to vary the kind of pattern repetition effected.
  • the yarns After leaving their piston assembly, the yarns pass over friction rollers which forward them at a rate determined by various factors including the restraining pressure exerted on them by the pistons and are then led to their needles which insert loops of varying length determined by the pressure of the pistons.
  • the invention may be used as the pressure transmission medium instead of air.
  • the pattern sensing means may consist of electrical brushes resting on the surface of a conducting pattern member, or a punched card or tape could be used.
  • a separate piston-and-cylinder assembly could be used for each yarn, these assemblies being fixed to a common support.
  • the location of the individual pistons relatively to one another and the needles is such that all the yarn paths between the pistons and needles are of substantially the same length.
  • each piston may be electrically controlled, a plurality of pistons equal to the number of repeats being connected to and moved by each pickup means.
  • Valves controlling compressed air to each such piston may be the movable cores of solenoids.
  • FIG. 1 shows a tensioning device using a cylindrical piston brake
  • FIG. 2 shows a similar tensioning device but using a ball brake
  • FIG. 3 shows the method of drilling a bar to hold the tension devices shown in FIGS. 1 and 3;
  • FIG. 4 is an arrangement of individual tensioners shown partly in section, each using an individual brake cylinder aifixed to a common bar;
  • FIG. 5 is an end view of the tensioners and feed rollers
  • FIG. 6 shows one method of controlling a pattern repeat by air multiplying
  • FIG. 7 shows a combined brake, cylinder, valve and solenoid
  • FIG. 8 shows a method of multiplying assemblies as shown in FIG. 7, electrically.
  • a single common bar 1 having a guide hole 2 bored through it, this hole carrying a single yarn.
  • the yarn is derived from a creel to the left of the figure and the yarn is drawn through the hole in the direction of the arrow towards the right of the figure in a manner to be described in connection with FIG. 4.
  • the bar also contains a plurality of drillings 3, the axes of which are at right angles to the hole 2 for the yarn.
  • the hole 3 is provided with a thread 4 at its upper end and a pipe joint assembly is screwed into the thread. Compressed air is supplied to this particular assembly via a pipe 6, the air being under control of a patterning arrangement; in the hole 3 there is a cylindrical piston 7 with a rounded lower end, this lower end being adapted to engage a yarn passing through the hole 2.
  • FIG. 2 shows an alternative form of yarn brake.
  • the fitting 5 is the same as before, together with an air supply pipe 6.
  • the main difference is that in the hole 3 there is a ball 8, the hole being of such dimensions that the ball slides with as little clearance as possible in the hole.
  • This arrangement is slightly cheaper than that shown in FIG. 1 but the piston end is preferred in that its braking effect is less variable than that exerted by a ball.
  • FIGS. 4 and 5 a common bar is here provided, the bar being seen from the end at right angles to the traverse of the yarn.
  • Above and below the bar there are a number of individual brake assemblies, one of which is shown in section at 11. As before, the brake assemblies are staggered from front to back of the bar so as to obtain a maximum number of yarns for a given assembly width.
  • each of these assemblies comprises a cylinder 14, a piston 15 having a seal 15a and piston rod 16, a retractor spring 17 and a yarn brake shoe 15b.
  • Each brake assembly has a stepped end 11a of slightly smaller diameter, this end being adapted to fit into the bar 12 or 13' where it is held with a set screw 21.
  • the upper end of each cylinder is connected to a joint member 18, with compressed air entry pipe 19 and a connection to another valve 20.
  • the valve 20 effects a pattern repeat which is described later and is operated simultaneously with the assembly shown in FIG. 4.
  • Each yarn such as 23 passes over the surface of the brake plate 10 between spacer pins 25, 26, the pins for the cylinder shown in section being displaced slightly from the pins shown for the adjacent cylinder shown in full view so that each cylinder and brake acts on one yarn only.
  • the cylinder assemblies below the bar 10 are also staggered with respect to the cylinders above the bar so that four yarns are braked by the particular cylinders shown in the drawing, with minimum possible sideways spacing between the yarns.
  • the bars 12, 13 carry as many cylinders as there are yarns to be woven by the machine.
  • cylinder 30 is connected by means of a pipe 31 to a controllable valve 32, this valve being actuated by means of a solenoid '33.
  • a pipe 34 which continues to the next cylinder along the bar .10.
  • the pipe 34 is connected to pipe 31 in a T-junction 36 and connects to the next cylinder similar to 30 which repeats the pattern woven by the yarn under control of the cylinder 30. A further connection is taken from this next cylinder to the next and so on, until the whole number of pattern repeats is effected.
  • valves such as 32 Similar connections from valves such as 32 are taken to all of the cylinders shown in the figure, from dilferent valves, each controlled by a dritferent solenoid and pattern multiples of pipes similar to that shown in connection with cylinder 30 are also fitted to each of the other cylinders. Pattern multiplying takes place in a direction along the bar 10 at right angles to the plane of the paper.
  • valve 32 is connected by a pipe 31 to a cylinder assembly 30.
  • the valve is controlled by a solenoid 33 and it is supplied with pressure air via a pipe (not shown).
  • the valve also has an exhaust port so that after de-energisation of its operating solenoid the valve returns to its normal position and allows air to escape from the cylinders it controls, the pistons of which are removed from their associated yarns by the springs within the cylinders.
  • the cylinder 30 is connected by another pipe to the adjacent cylinder 30a, then to a further cylinder 30b and so on, there being a number of cylinders across the machine equal to the number of repeats.
  • a similar group of cylinders is equipped with a similar valve and solenoid for the next set of yarns to be controlled and so on, these valves then extending across the width of a single pattern repeat in each case.
  • a bar 60 of insulating material is shown, having a number of clips 61 corresponding in number and position to the number of terminals 55 located across the width of the machine. There are also a number of other clips 62, these being equal to the number of yarns in each repeat.
  • the bar with its clips is located, when in use on the machine, so that all the clips 61 engage with all the terminals 55.
  • the terminals 62 engage with relay contacts of the pattern detecting mechanism which control the operation of the solenoids.
  • a set of multiple Wires 63 inter-connects the clips 62 and clips 61; if the number of pattern repeats is to be changed, all that is required is to supply another bar 60 with different connections 63.
  • a tufting machine including loop forming means for making carpets and like pile fabrics with a repeat pattern thereon of loops of varying length and having means for selectively applying tension to selected yarns, said machine comprising a common bar;
  • said common bar having cylindrical holes equal in number to said guide holes and extending into said common bar for intersection with said guide holes;
  • a brake piston means slidable in each said cylindrical hole for engagement with respective yarns feeding through said guide holes to said loop forming means for selectively applying tension to said yarns;
  • compressed air means connected to each said cylindrical hole for pressing said piston means against its respective yarn

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Knitting Machines (AREA)
US610988A 1966-01-28 1967-01-23 Yarn tensioning apparatus for tufting machines capable of making pile fabrics with repeat patterns thereon of loops of varying lengths Expired - Lifetime US3416471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3867/66A GB1105909A (en) 1966-01-28 1966-01-28 Improvements in tufting machines

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US3416471A true US3416471A (en) 1968-12-17

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US610988A Expired - Lifetime US3416471A (en) 1966-01-28 1967-01-23 Yarn tensioning apparatus for tufting machines capable of making pile fabrics with repeat patterns thereon of loops of varying lengths

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US (1) US3416471A (xx)
DE (1) DE1685116A1 (xx)
FR (1) FR1508949A (xx)
GB (1) GB1105909A (xx)
NL (1) NL6701409A (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042405A (en) * 1989-05-09 1991-08-27 Tomkinsons Plc Yarn control method and apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1860072A (en) * 1929-04-24 1932-05-24 Clarence A Braudes Tensioning device
US2862465A (en) * 1955-05-16 1958-12-02 Card Joseph Lewis Thread feed mechanism and pattern control therefor
US2971722A (en) * 1956-03-29 1961-02-14 Magee Carpet Co Yarn tensioning and control mechanism
US3067701A (en) * 1959-07-31 1962-12-11 A & M Karagheusion Inc Apparatus for forming tufted patterns
GB1011496A (en) * 1963-10-25 1965-12-01 Ellison Tufting Machinery Ltd Improvements relating to tufting machines
US3334601A (en) * 1964-09-07 1967-08-08 Ellison Tufting Machinery Ltd Tufting machines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1860072A (en) * 1929-04-24 1932-05-24 Clarence A Braudes Tensioning device
US2862465A (en) * 1955-05-16 1958-12-02 Card Joseph Lewis Thread feed mechanism and pattern control therefor
US2971722A (en) * 1956-03-29 1961-02-14 Magee Carpet Co Yarn tensioning and control mechanism
US3067701A (en) * 1959-07-31 1962-12-11 A & M Karagheusion Inc Apparatus for forming tufted patterns
GB1011496A (en) * 1963-10-25 1965-12-01 Ellison Tufting Machinery Ltd Improvements relating to tufting machines
US3334601A (en) * 1964-09-07 1967-08-08 Ellison Tufting Machinery Ltd Tufting machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042405A (en) * 1989-05-09 1991-08-27 Tomkinsons Plc Yarn control method and apparatus

Also Published As

Publication number Publication date
NL6701409A (xx) 1967-07-31
GB1105909A (en) 1968-03-13
FR1508949A (fr) 1968-01-05
DE1685116A1 (de) 1971-09-30

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