US3693379A - Method of operating a warp knitting machine - Google Patents

Method of operating a warp knitting machine Download PDF

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Publication number
US3693379A
US3693379A US143489A US3693379DA US3693379A US 3693379 A US3693379 A US 3693379A US 143489 A US143489 A US 143489A US 3693379D A US3693379D A US 3693379DA US 3693379 A US3693379 A US 3693379A
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United States
Prior art keywords
weft
storage
knitting
drive connection
machine
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Expired - Lifetime
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US143489A
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English (en)
Inventor
Walter Reiners
Albert Tho Pesch
Karl Bungter
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Individual
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Individual
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B23/00—Flat warp knitting machines
    • D04B23/12—Flat warp knitting machines with provision for incorporating unlooped wefts extending from selvedge to selvedge

Definitions

  • Tick I 5 7 ABSTRACT Method of operating a warp knitting machine includes, after interruption of a wefl running to the weft storage and activation of a machine shut-down device, initially controlling slow-down of the knitting instruments of the machine so that when the machine stops, the weft storage has been emptied of all but a predetermined number of weft lengths, severing the drive connection between the weft storage and the knitting instruments, removing from the weft storage the weft remaining therein, automatically filling the weft storage with weft, and the restoring the drive connection for continuing the knitting operation.
  • weft breaks during the knitting operation can never fully be avoided, care must be taken that, before the knitting machine is restarted after shutdown due to a weft break, a faultless reconnection of the broken weft to the supply thereof remaining in the weft storage is achieved.
  • the thread material from the weft storage that was used up during the slow-down f the machine must be replaced, and the weft supply must be restored to the required number of readied wefts.
  • method of operating a warp knitting machine having a weft insertion device, a weft storage for the weft that is to be inserted, a plurality of knitting instruments drivingly connectible to the weft storage, and a machine shut-down device activated at interruption of a weft being fed to the weft storage which comprises, after interruption of a weft running to the weft storage and activation of the shut-down device, initially controlling slow-down of the knitting instruments so that when the machine stops the weft storage has been emptied of all but a predetermined number of lengths of the weft stored therein, severing the drive connection between the weft storage and the knitting instruments, removing from the weft storage the weft remaining therein, automatically refilling the weft storage with weft, and then restoring the drive connection between the weft storage and the knitting instruments for continuing the knitting operation.
  • the severing and restoration of the drive connection between the weft storage and the knitting instruments is effected at a predetermined clutch position so that, after a weft interruption or break, the knitting instruments, such as the needle bar, insertion bar, knockingover bar and the like, tend to remain in a position which affords the best starting position for re-inserting the weft from the newly filled weft storage and for continuing the knitting process.
  • a weft inserter or folder which serves to insert the weft, is brought into a starting position, then the weft is threaded into the weft inserter, and thereafter deposited at the weft storage in folded lengths.
  • a thread guide traveling in a circular revolving path may serve as the weft inserter or folder, the thread guide coming to a stop at a selected point of the revolving path thereof, after the slowdown of the machine has terminated.
  • the starting position of such a weft inserter is advantageously located in the vicinity of the edges of the knitted web since it is most readily accessible thereat and the broken thread end coming from the weft supply is able to be threaded into the weft inserter thereat and secured to a holder element of the weft storage in an especially simple manner.
  • the filling of the weft storage can be effected fully automatically by the weft inserter or folder.
  • the weft inserter carries out a predetermined number of revolutions and fills with the corresponding number of thread lengths, the weft storage which is displaced simultaneously in direction toward the still stationary knitting instruments.
  • the weft initially inserted or deposited in the storage is subsequently located in the delivery position thereof at the knitting instruments, the aforementioned predetermined clutch position is attained simultaneously therewith and the drive connection between the weft storage and the knitting instruments can be restored. The knitting process per se is then resumed.
  • FIG. 1 is a simplified diagrammatic plan view of part of a Raschel knitting machine with weft storage and weft filler shown in reduced scale
  • FIGS. 2, 3 and 4 are diagrammatic longitudinal views of the weft filler of FIG. 1 shown in three different stages;
  • FIG. is an enlarged elevational view of a detail of the weft storage of FIG. I showing the knitting instruments in cross section.
  • FIG. 1 there is shown a needle bar 1 having knitting needles 2 and a knitted web 3 into which a continuous weft 4 is knitted.
  • the weft 4 comes from a supply coil 5 and, during the knitting operation, is alternatingly placed by a continuously revolving thread or weft tiller 6 about the individual holder members 9 and 9a of the weft insert wheels 10 and 10a of a weft storage 11 and, in the embodiment shown in FIG. 1, is knitted into the web with each course.
  • FIG. 1 those components which deliver the individual weft behind the knitting needles 2, are omitted from the figure.
  • FIG. 1 shows, furthermore, the ends 4' and 4" of the broken thread 4 which have come out of the guiding eye 7 during the slow-down movement of the thread feeder 6.
  • the diagrammatic view of FIG. 1 shows all of the cooperating members in stationary position attained after the occurrence of a thread break and the attendant slow-down phase. It is readily apparent that during the slow-down of the machine, the supply of weft in the weft storage 11 is not fully used so that the last completely knitted course possesses the entire weft thereof.
  • the thread feeder 6 To automatically fill the weft storage II by means of the thread feeder 6, the latter is then brought into the starting position thereof wherein the guiding eye 7 assumes the position of the point 15 in FIG. 4. In this readily accessible position, the end 4 of the weft 4 extending from the supply coil 5 is threaded through the guiding eye 7 and is secured to a holder member 9 of a weft insertion wheel 10 of the machine.
  • each of the two weft insertion wheels 10 and 10a (note FIG. 1) has eight holder members 9, respectively. Only the, weft insertion wheel 10 located in the vicinity of the edge 18 of the knitted web shown in FIG. I is illustrated in FIG. 5.
  • eight wefts 4 become stored.
  • the initially fed weft 4a is already located in insertion position so that, with the restoration of the drive connection which occurs also at the point 13 of FIG. 3, it can be immediately fed or placed behind the knitting needles 2 by the stitch comb 17 shown in FIG. 5 and can be knitted into the knitted web 3 that is located above the knocking-over bar 19 in FIG. 5.
  • FIG. 5 there is shown quite schematically the drive connection for the weft storage 11 and knitting instruments 1, 2, I9 as intersecting dot-dash lines, a clutch of the aforementioned type being connected between the weft storage and the knitting instruments. Also shown very schematically in FIG. 1 is a feeler or sensing member 20 normally engaging the weft 4 and releasable by the breaking of the weft 4 to open the power circuit to the knitting machine and thereby shut down the machine.
  • Method of operating a warp knitting machine having a weft insertion device, a weft storage for the weft that is to be inserted, a plurality of knitting instruments drivingly connectible to the weft storage, and a machine shut-down device activated at interruption of a weft being fed to the weft storage, which comprises, after interruption of a weft running to the weft storage and activation of the shut-down device, initially controlling slowadown of the knitting instruments so that when the machine stops, the weft storage has been emptied of all but a predetermined number of lengths of the weft stored therein, severing the drive connection between the weft storage and the knitting instruments, removing from the weft storage the weft remaining therein, automatically refilling the weft storage with weft, and then restoring the drive connection between the weft storage and the knitting instruments for continuing the knitting operation.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US143489A 1970-05-16 1971-05-14 Method of operating a warp knitting machine Expired - Lifetime US3693379A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702024088 DE2024088A1 (de) 1970-05-16 1970-05-16 Verfahren zum Betrieb einer Ketten wirkmaschine

Publications (1)

Publication Number Publication Date
US3693379A true US3693379A (en) 1972-09-26

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US143489A Expired - Lifetime US3693379A (en) 1970-05-16 1971-05-14 Method of operating a warp knitting machine

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US (1) US3693379A (cg-RX-API-DMAC7.html)
JP (1) JPS4820909B1 (cg-RX-API-DMAC7.html)
CS (1) CS152497B2 (cg-RX-API-DMAC7.html)
DE (1) DE2024088A1 (cg-RX-API-DMAC7.html)
GB (1) GB1320803A (cg-RX-API-DMAC7.html)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3616656A (en) * 1968-07-19 1971-11-02 Reiners Walter Warp knitting machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3616656A (en) * 1968-07-19 1971-11-02 Reiners Walter Warp knitting machine

Also Published As

Publication number Publication date
GB1320803A (en) 1973-06-20
DE2024088A1 (de) 1971-12-02
CS152497B2 (cg-RX-API-DMAC7.html) 1973-12-19
JPS4820909B1 (cg-RX-API-DMAC7.html) 1973-06-25

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