US3643471A - Warp knitting machine - Google Patents

Warp knitting machine Download PDF

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Publication number
US3643471A
US3643471A US840161A US3643471DA US3643471A US 3643471 A US3643471 A US 3643471A US 840161 A US840161 A US 840161A US 3643471D A US3643471D A US 3643471DA US 3643471 A US3643471 A US 3643471A
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United States
Prior art keywords
weft
ready
needles
thread guide
warp threads
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Expired - Lifetime
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US840161A
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English (en)
Inventor
Stefan Furst
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Individual
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Individual
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Publication date
Priority claimed from DE19681760860 external-priority patent/DE1760860C3/de
Application filed by Individual filed Critical Individual
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Publication of US3643471A publication Critical patent/US3643471A/en
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Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B23/00—Flat warp knitting machines
    • D04B23/16—Flat warp knitting machines specially adapted for producing fabrics, or article blanks, of particular form or configuration
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B23/00—Flat warp knitting machines
    • D04B23/12—Flat warp knitting machines with provision for incorporating unlooped wefts extending from selvedge to selvedge

Definitions

  • a warp knitting machine having a zone wherein knitting neeclles are disposed and means for supplying warp threads to the July 1968 Germany 17 60 860's needles includes device for filling a weft having holder members for making the weft ready outside the needle zone, the gill holder members being disposfid in the vicinity of we reversal locations and being rotatable in closed travel paths, and means [58] ll ield all Search ..66/83, 84-, 85, 86, 125 for guiding the weft to the warp threads the holder members r having a thread guide cooperating therewith for making the [56] Refiemmm Caged weft ready, the thread guide being displaeeable in the closed UNHTED STATES PATENTS travel path of one of the holder members.
  • WARP ltlhlllTTllNG MACHINE My invention relates to warp knitting machines and especially to Raschel knitting machines with a device for feeding or filling a weft which is made ready outside the needle zone of the machine by means of holder members located in the vicinity of weft reversal points, and is applied to the warp threads in the machine by means ofguide members.
  • a warp knitting machine with a thread guide for making a weft ready, which is guided or displaced in a closed travel path ofa holder device.
  • a travel path can be a circular path, for example. it is also possible however to employ an ellipse, an oval or similar closed path as the travel path for the holder members and accordingly for the thread guide.
  • the essential requirements for the shape of the travel path according to my invention is that, instead of the heretofore commonly used linear movement for inserting or filling a weft, which has been adopted by weavers looms, a rotary motion is employed.
  • the rotating ofa thread is thereby considerably accelerated since the formerly required braking virtually to the point of stopping of the heretofore known weft-introducing devices is dispensed with by the device of my invention.
  • the thread guide is located at one end of a rotatably mounted rod bent in the form of a crank.
  • a bearing about which the rod is rotatable is located at the other end portion of the rod, the rod being tubular in construction at least at the bearing thereof.
  • a weft is then guided through the tubular bearing of the rod and thereafter through the thread guide.
  • the thread guide is pivotally mounted on the circulating belt and is connected additionally to a direction stabilizer which extends to a point located outside the travelling belt. in this manner, the thread guide is always held so that the thread can enter and leave the thread guide without coming into the vicinity of any holder member for the thread guide.
  • a further simplification of the device according to my invention is obtainable by providing holder members that are located in the vicinity of the weft reversal points which serve simultaneously as guide members for introducing or applying the weft to the warp threads. More specifically in accordance with my invention, l provide such guide members in the form of rotary elements that are rotatably driven in opposite rotary directions. by this means, the holder members, in one position thereof, take up the weft which has been made ready by the thread guide and, after a suitable rotation, deliver the weft to the warp threads in the other position ofthe holder members.
  • H6. 2 is an enlarged perspective view of part of H6. 1 depicting schematically the thread insert or filling operation;
  • FIGS. 3, d and 5 are fragmentary views of FIG. 2;
  • FlGS. t5 and '7 are fragmentary schematic views of FIG. 1 showing two stages of the thread insert of filling operation;
  • FIG. 8 is an elevational view of mechanism according to my invention for laying or spreading thread in the form of an oval
  • HG. 9 is a partial view of FIG. 8 as seen from the right-hand side of the latter.
  • FIG. ll there is shown a Raschel knitting machine having a projecting arm .12 secured by connecting members or crosspieces as and d? to a frame sidewall T.
  • a pair of cross wound bobbins or cheeses 3 and d are carried by the arm 2, and the threads wound thereon are connected in a conventional manner for the purpose of affording continuous unwinding of a weft 5 therefrom.
  • the weft 5 is guided from the cheese 3 through a tubular shaft b and through a thread guide 68 located at an outer or free end 7 of a rod ii bent like a crank.
  • lFlG As shown in the enlarged view of lFlG.
  • the tubular shaft or rotary bearing ii is integral with the rod ti, which is pivotally mounted thereby in bearings provided :in a crosspiece holder member 9 (H6. ll) that is secured to the sidewall ll.
  • the cranklike rod fl is provided with a counterweight ill) at the end 8 thereof opposite the free end '7.
  • the cranklike rod it is driven through a transmission system which includes a first sprocket or chain wheel lit, a chain 12 and a second chain wheel 13 that is mounted on a shaft M.
  • the shaft lid receives its driving power through a bevel gear 15 mounted thereon and meshing with another bevel gear llb fixed to the main drive shaft l7 of the Raschel knitting machine.
  • the main drive shaft ll' carries a cam llli by means of which a lever 22d, carrying follower rollers 69 and 70 in engagement with the surface of the cam lid, is pivotable about a pivot shaft
  • the lever 2th is connected by an articulating joint 22 with a carrier rod 23 which supports a needle bar 21 and raises and lowers the latter in accordance with the motion imparted thereto by the rotating cam 18.
  • the carrier rod 23 is connected at its lower end, as viewed in FIG. 1, through an articulating joint 24 to a pull lever 25, which is rotatably mounted on a pin 26 extending from the sidewall 1.
  • a cutting plate 27 is fixed to the sidewall 1 and extends transversely thereto.
  • Material 28 which has been knitted in the Raschel knitting machine of the invention is withdrawn from the needles 31 by rotatably mounted feed rollers 29 and 30 suitably driven, for example, through nonillustrated transmission mechanism from the main drive shaft 17, and is wound on a beam 32.
  • a traverse 33 is mounted transversely to the sidewall 1.
  • partial warp beams 34 and 35 are rotatably mounted in the upper part of the sidewall 11, and warp threads 36 and 37 lead therefrom, respectively, through spring seesaws or rocker arms 38 and 38' to the eye needles 39 and 40.
  • holder members 41 and 42 are located in the vicinity of the weft reversing points 71.
  • the holder members 41 and 42 are' driven through drive means 43, such as a chain, by a drive or sprocket wheel 44 mounted on the shaft 14.
  • FIG. 2 shows schematically and in enlarged perspective view, the rod 8 bent like a crank which is employed for carrying out the thread insertion or filling operation.
  • the outer or free end 7 of the cranklike rod 8 provided with the thread guide 68 describes a circular rotary path 45 in direction of the arrow 46.
  • the holder members 41 and 42 move in direction of the curved arrows 4'7 and 48, respectively, so that they traverse a quarter rotation in the respective indicated direction of the arrow uniformly or also nonuniformly, when the thread guide 63 traverses a half rotation.
  • This half rotation of the thread guide 68 occurs during each formation of a stitch, i.e., the transmission ratio between the main shaft and the tubular shaft 6 through the transmission system members 13, 12 and 11 is 1:2.
  • the thread guide 68 directs the weft over a tapering nose 49 of the holder member 41, while the loop 50 of the weft 5 is applied by the holder member 42 and the tapering nose 5! thereof to the finished knitted web 28 and behind the latch needles 31 so that the weft 5 is disposed in a position wherein it is tied into the stitches when the latch needles 31 rise and the subsequent conventional stitch-forming movements are carried out by the eye needles 39 and 40.
  • the holder members 41 and 42 simultaneously serve as guide members for applying the weft 5 to the warp threads.
  • FIG. 4 there is illustrated in somewhat enlarged view, the lower part of FIG. 2, showing how the loop 50 of the weft 5' is guided to the finished knitted material 28 and how the readied weft 5 behind the needles 3 is located in its lowermost position.
  • the loop 50 is so large that the high-rising needle locks the weft 5 behind it, yet the weft 5 is not engaged by the forward zones of the needles 31.
  • FIG. 6 the holder member 42 is shown in delivery position while the holder member 41 has again recaptured the thread from the circulatory path of the thread guide 68.
  • the loop 50 is already interknitted or tied into the stitch, because a new weft 5 has again been placed in readiness behind the needles due to the movement of the holder member 41 in direction of the arrow 47.
  • the nose 51 of the holder member 42 takes up the new loop of the weft 5.
  • strippers 53 and 54 that are provided adjacent the holder members 41 and 42 and serve for facilitating the withdrawal from the noses 49, 49 and 51, 51' of the loop 50 formed by the holder members 41 and 42.
  • FIG. 8 there is shown an endless rotation belt 55 forming an oval circulatory path.
  • the belt 55 travels in direction of the arrow 56 and carries a thread guide 57 which is rotatably connected by a pin 58 to the belt 55.
  • the thread guide 57 carries a direction stabilizer 59 which is longitudinally movably mounted in a bore 6-0 of a pivotable guide member 61.
  • the band 55 is guided over two sheaves 62 and 63 whose drive corresponds to that of the cranklike rod 8.
  • the noses 49 and 51 are shown within the region of the circulatory path formed by the band 55.
  • the nose 51 is shown in FIG. 8 already in the delivery position thereof.
  • the weft 5 is guided from the cross wound bobbin or cheese 3 through stationary thread reversing or diverting members 64 and 65.
  • the weft 5 then passes through the tubular thread guide 57 and is threaded in the direction of the arrow 72.
  • the oval thread guidance embodiment of FIG. 8 and 9 has the advantage of minimizing the structural height of the thread filling mechanism according to my invention.
  • the device for filling a weft according to my invention can be constructed so that the weft is inserted or filled over the entire width of the web of material being knitted. It is also possi ble however, to dispose several of such devices adjacent one another in order to produce several separate knitted webs of material simultaneously on a wide warp knitting machine. ln stead of a single weft, also several wefts can be inserted or filled simultaneously by one thread guide.
  • the drive for the device for inserting a weft according to my invention can be transmitted in such a way that the weft for each row of stitches, is inserted instead in any interrupted sequence.
  • the conventional additional means employed for su porting and stabilizing the weft can also be employed with the device of my invention.
  • a device for filling a weft having a pair of means for making the weft ready outside the needle zone and guiding the weft to the warp threads, said pair of means being disposed in the vicinity of weft reversal locations, respectively, and including a holder member located at one weft reversal location and a guide member for guiding the weft to the warp threads located at the other weft reversal location, a single thread guide cooperating with said weft make-ready means for making the weft ready, said thread guide being displaceable in a closed travel path between said weft reversal locations and intercepting said holder member and said guide member at the respective weft reversal locations, said thread guide being located at one end of a rod bent in the form of a crank, said rod having a bearing portion adjacent the other end thereof and being of hollow tubular
  • Warp knitting machine including means defining a path of travel for the weft in a given direction, said bearing portion being displaceable in a direction parallel to the given direction of said weft travel path.
  • a device for filling a weft having a pair of means for making the weft ready outside the needle zone and guiding the weft to the warp threads, said pair of means being disposed in the vicinity of weft reversal locations, respectively, and including a holder member located at one weft reversal location and a guide member for guiding the weft to the warp threads located at the other weft reversal location, a single thread guide cooperating with said weft make-ready means for making the weft ready, said thread guide being displaceable in a closed travel path between said weft reversal locations and intercepting said holder member and said guide member at the respective weft reversal locations, the needles in the zone thereof being arranged in a row, and said thread guide being mounted on an endless rotating band, said endless band extending substantially parallel to the row of needles, the thread guide being pivotally mounted on said endless band and including a direction stabilizer connected to said thread guide and passing through
  • a device for filling a weft having a pair of means for making the weft ready outside the needle zone and guiding the weft to the warp threads, said pair of means being disposed in the vicinity ofweft reversal locations, respectively, and including a holder member located at one weft reversal location and a guide member for guiding the weft to the warp threads located at the other weft reversal location, a single thread guide cooperating with said weft make-ready means for making the weft ready, said thread guide being displaceable in a closed travel path between said weft reversal locations and intercepting said holder member and said guide member at the respective weft reversal locations, both of said pairs of weft make-ready means comprising holder members simultaneously serving as guide members for applying the weft to the warp threads, said guide members
  • Warp knitting machine including means for rotating said guide members in opposite rotary directions.
  • a device for filling a weft having a pair of means for making the weft ready outside the needle zone and guiding the weft to the warp threads, said pair of means being disposed in the vicinity of weft reversal locations, respectively, and including a holder member located at one weft reversal location and a guide member for guiding the weft to the warp threads located at the other weft reversal location, a single thread guide cooperating with said weft make-ready means for male ing the weft ready, said thread guide being displaceable always in the same direction in a closed travel path between said weft reversal locations and intercepting said holder member and said guide member at the respective weft reversal locations.
  • both of said pairs of weft mal e-ready means comprise holder members simultaneously serving as guide members for apply ing the weft to the warp threads.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US840161A 1968-07-11 1969-07-09 Warp knitting machine Expired - Lifetime US3643471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681760860 DE1760860C3 (de) 1968-07-11 Vorrichtung zum Vorlegen von Schußfäden für Kettenwirkmaschinen

Publications (1)

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US3643471A true US3643471A (en) 1972-02-22

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ID=5696250

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Application Number Title Priority Date Filing Date
US840161A Expired - Lifetime US3643471A (en) 1968-07-11 1969-07-09 Warp knitting machine

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US (1) US3643471A (enrdf_load_stackoverflow)
JP (1) JPS4819908B1 (enrdf_load_stackoverflow)
BE (1) BE735942A (enrdf_load_stackoverflow)
CH (1) CH493671A (enrdf_load_stackoverflow)
CS (1) CS149668B2 (enrdf_load_stackoverflow)
ES (1) ES369250A1 (enrdf_load_stackoverflow)
FR (1) FR2014561A1 (enrdf_load_stackoverflow)
GB (1) GB1272785A (enrdf_load_stackoverflow)
NL (1) NL6910618A (enrdf_load_stackoverflow)
SU (1) SU384240A3 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834189A (en) * 1972-03-17 1974-09-10 Schlafhorst & Co W Warp knitting machine
US3906749A (en) * 1972-12-27 1975-09-23 Schlafhorst Co Maschf Weft storage device for warp knitting machines
US4045847A (en) * 1970-10-02 1977-09-06 Walford Richard L Apparatus for the manufacture of weft inserted non-woven fabrics

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1924649A (en) * 1929-06-06 1933-08-29 Morton James Warp knitting machine
US2000643A (en) * 1933-04-01 1935-05-07 Morton James Apparatus for supplying fibrous material for incorporation in fabrics
US2452579A (en) * 1945-10-03 1948-11-02 Lambach Fritz Warp knitting machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1924649A (en) * 1929-06-06 1933-08-29 Morton James Warp knitting machine
US2000643A (en) * 1933-04-01 1935-05-07 Morton James Apparatus for supplying fibrous material for incorporation in fabrics
US2452579A (en) * 1945-10-03 1948-11-02 Lambach Fritz Warp knitting machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045847A (en) * 1970-10-02 1977-09-06 Walford Richard L Apparatus for the manufacture of weft inserted non-woven fabrics
US3834189A (en) * 1972-03-17 1974-09-10 Schlafhorst & Co W Warp knitting machine
US3906749A (en) * 1972-12-27 1975-09-23 Schlafhorst Co Maschf Weft storage device for warp knitting machines

Also Published As

Publication number Publication date
JPS4819908B1 (enrdf_load_stackoverflow) 1973-06-16
CH493671A (de) 1970-07-15
BE735942A (enrdf_load_stackoverflow) 1969-12-16
CS149668B2 (en) 1973-07-25
ES369250A1 (es) 1971-05-16
FR2014561A1 (enrdf_load_stackoverflow) 1970-04-17
GB1272785A (en) 1972-05-03
NL6910618A (enrdf_load_stackoverflow) 1970-01-13
SU384240A3 (enrdf_load_stackoverflow) 1973-05-23

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