US3731642A - Looping machine with spring beard needle - Google Patents

Looping machine with spring beard needle Download PDF

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Publication number
US3731642A
US3731642A US00101250A US3731642DA US3731642A US 3731642 A US3731642 A US 3731642A US 00101250 A US00101250 A US 00101250A US 3731642D A US3731642D A US 3731642DA US 3731642 A US3731642 A US 3731642A
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US
United States
Prior art keywords
needle
row
hook
looping
spring beard
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00101250A
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English (en)
Inventor
H Wittki
L Weinmuller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kemptener Maschinenfabrik GmbH
Original Assignee
Kemptener Maschinenfabrik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19691964980 external-priority patent/DE1964980A1/de
Application filed by Kemptener Maschinenfabrik GmbH filed Critical Kemptener Maschinenfabrik GmbH
Application granted granted Critical
Publication of US3731642A publication Critical patent/US3731642A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B7/00—Linking machines, e.g. for joining knitted fabrics

Definitions

  • the looping material to be joined is transferred onto these row needles stitch-by-stitch and row-by-row, and the looping seam is formed by a spring beard needle having a central, downwardly pointing tip in cooperation with a thread feeder.
  • the spring beard needle has a hook with boundary surfaces inclined to the vertical line of symmetry of each row needle as well as parallel to each other.
  • the base of the hook is disposed substantially at right angles to the axis of symmetry of the needle shaft.
  • the present invention relates to a looping machine with a continuously advancing needle row bed composed essentially of individual row needles with groov es or rims extending in the longitudinal direction, and more particularly, to a looping machine wherein the looping material to be joined is transferred onto these row needles stitch-by-stitch and row-by-row, and the looping seam is formed by a spring beard needle having a central, downwardly pointing tip in cooperation with a thread feeder mechanism, wherein the boundary surfaces of the hook are inclined with respect to the vertical line of symmetry of each row needle.
  • a looping machine serves for bordering and/or joining looping material such as hosiery or knitted goods, or the like by a singleor double-thread warp or chain stitch.
  • the stitch-forming tools must seize and sew together stitch-by-stitch of the portions of material to be joined. In order to accomplish this, it is necessary to first transfer the looping material stitchby-stitch and row-by-row on to the row needles of the looping machine.
  • Looping machines which have a sewing needle stitching from the inside toward the outside or in the reverse direction. If it is desired, for example, in a machine having a sewing needle stitching from the inside toward the outside to form the looping seam on the outside of the looping material, this can only be effected by a spring beard needle. In this operation, the stitch formation takes place in the following stages:
  • the spring beard needle is moved from the inside toward the outside in the direction toward the row needle crown and penetrates the looping material disposed on this crown;
  • the needle is now moved toward its extreme point of reversal.
  • the thread feeder mechanism places a loop around the needle shaft during this step;
  • the needle then returns to its innermost point of reversal. During this step, the loop laid by the thread feeder mechanism enters the hook base and is pulled through the looping material;
  • the transition of the hook i. e. the contour of its defining walls leading into the needle shaft, takes place at sharp edges.
  • the lowermost of these edge lines is disposed on the side of the needle shaft where preferably the full circumference thereof is to be effective for guiding the needle in the groove. Therefore, part of the thread laid by the thread feeder is caught between this sharp edge and the groove of the row needle during the return movement, so that the thread can be severed.
  • the tip of the needle hook is disposed at a corner formed by the oval lateral surface and the flattened lateral surface so that, if the hook engages the old stitch disposed on the needle shaft during the return movement of the needle, this stitch is torn.
  • a spring beard needle with a substantially symmetrical hook having boundary surfaces which are oriented in parallel to each other and extend in parallel to the axis of symmetry of the needle shaft.
  • the hook base is disposed at right angles to this axis of symmetry, wherein the boundary surfaces, over the entire length of the hook, form a constant angle with respect to the vertical line of symmetry of each row needle, on which the tip of the spring beard needle is disposed.
  • the tip of the spring beard needle points downwardly, as conventional per se, and extends beyond the needle shaft body. Upon the return movement of the needle, a portion of the sewing thread is thus moved underneath the needle shaft body. The downwardly pointing tip which projects beyond the diameter of the needle shaft prevents the thread from slipping off.
  • a preferred embodiment according to the present invention provides that the lateral contour of the needle hook disposed closest to the row needle groove is recessed toward the center of the needle, thereby obtaining a larger amount of play for the sewing thread.
  • the advantages attainable by the present invention reside, in particular, in that no special drive means need be made available for a normal crochet needle which ensures the free run of the sewing thread and which is furthermore securely guided in the row needle groove.
  • the needle is sufficient, for example, without an expensive drive mechanism which is susceptible to breakdown.
  • the sewing needle of the present invention especially due to its uncomplicated structure, serves for ensuring safety in operation to the highest degree, so that a machine can be operated with this needle at the highest speeds, thereby making it possible to form flawless stitches. Due to the downwardly pointing tip of the sewing needle, the shaft is freed of the row needle groove, so that a large amount of free space is made available for the sewing thread.
  • FIG. 1 is a simplified, partial view of a looping machine
  • FIG. 2 is a sectional view of a row needle crown of the looping machine according to FIG. 1;
  • FIG. 3 is an enlarged, partial view of a spring beard needle in accordance with the present invention.
  • FIG. 4 is a top view of the needle shown in FIG. 3;
  • FIGS. 5 through 9 show the stitch-forming process. (Note that FIG. 7 is taken along section VII-VII of FIG. 6.)
  • a looping machine 1 consists essentially of a machine top part 2. which is rotatably mounted with respect to the surface of a pedestal and which, in turn, has a row needle crown 3 and an overhead arm 4.
  • the overhead arm 4 carries at its free end a thread feeder 5, and the drive elements of the thread feeder are supported in the overhead arm 4 in a conventional manner (not shown).
  • the row needle crown 3 is composed of individual row needles 6 which are preferably mounted in segments 7 and are secured by a pressure plate 8.
  • a shaft 10 terminates in a tip 1 I with a tip point 12, and the tip, along with its tip point, extends beyond the needle shaft body.
  • the tip point 12 takes over the guidance of the spring beard needle in each groove 13 of the row needles 6.
  • the hook 14 is distinguished by its symmetrical dimensions and is inclined with respect to the vertical line of symmetry of the row needle 6, on which the tip point 12 of the spring beard needle 9 is further disposed.
  • the two boundary surfaces 15 and 16 of the hook 14 extend in parallel to each other and, in parallel to the axis of symmetry 17 of the needle shaft 10.
  • the base 18 of the hook is at right angles to this axis of symmetry.
  • FIG. 4 shows the spring beard needle 9 of FIG. 3 in a top view. It can be seen that the tip 1 1 tapers symmetrically to its tip point 12, and the hook 14 is disposed obliquely with respect to the vertical line of symmetry of each row needle 6.
  • the needle is illustrated in its extreme point of reversal, that is after penetrating the looping material.
  • the thread feeder 5 places a sewing thread 19 around the needle shaft 10.
  • the path of the thread feeder is dimensioned so that the sewing thread 19 is closely looped around the shaft 10.
  • the sewing thread 19 enters the hook base 18 and, during passage through the looping material, assumes the position illustrated in FIG. 6.
  • the path of the sewing thread in the hook base 18 is shown in section in FIG. 7.
  • a lateral contour 20 can be recessed toward the center of the needle, so that a free run of the sewing thread is ensured.
  • FIG. 8 the needle is illustrated in its innermost point of reversal.
  • the sewing thread 19 is held in the illustrated position by the hook 14.
  • one end 21 of the sewing thread 19 is automatically disposed underneath the tip point 12.
  • the tip which is extended relatively far toward the front, prevents the end 21 of the sewing thread 159 from falling off.
  • Looping machine including a continuously advancing row needle bed essentially comprising individual row needles, each having a groove extending in the longitudinal direction thereof, whereby looping material to be joined is transferred onto the row needles stitch-by-stitch and row-by-row, and a spring beard needle with a shaft body and a central, downwardly pointing tip in cooperation with thread feeder means for forming a looping seam, said tip having a tip point which slidably guides the spring beard needle on a surface of the row needle, said spring beard needle having a hook with boundary surfaces disposed obliquely to a vertical line of symmetry of each of the row needles, the hook being substantially symmetrical, and the boundary surfaces of said hook being parallel to each other and extending parallel to a longitudinally extending axis of symmetry of the shaft body.
  • looping machine wherein the hook has a base disposed substantially normal to the axis of symmetry, and the boundary surfaces form a constant angle with the vertical line of symmetry over the entire length of the hook.
  • looping machine wherein the hook has a base disposed substantially normal to the axis of symmetry, and the boundary surfaces form a constant angle with the vertical line of symmetry over the entire length of the hook.
  • looping machine according to claim 1, wherein the hook has a lateral contour disposed closest to the row needle groove and recessed with respect to the center of the needle.
  • looping machine wherein the hook has a base disposed substantially normal to the axis of symmetry, and the boundary surfaces form a constant angle with the vertical line of symmetry over the entire length of the hook.
  • looping machine according to claim 1, wherein said shaft body is cylindrical in cross-section.
  • a spring beard needle for use in a looping machine of the type including a continuously advancing row needle bed having individual row needles, each row needle having a groove extending in the longitudinal direction thereof for guiding the spring beard needle during transfer of looping thread from a thread feeder onto the row needles stitch-by-stitch and rowby-row; said spring beard needle comprising: a longitudinally extending shaft body, a centrally disposed downwardly pointing tip point at one end of said needle for guiding movement of said needle within the respective grooves of the row needles, and a hook for releasably holding said looping thread during looping operations, said hook having side boundary surfaces parallel to one another and extending parallel to the longitudinal axis of symmetry of said shaft body, said side boundary surfaces extending obliquely with res ect to the vertical Iplane of symmetry of said shaft bo y when said spring eard nee le is operatively positioned in the groove of a row needle.
  • a needle according to claim 12, wherein said hook includes a base surface disposed substantially perpendicular to the longitudinal axis of said shaft, said base surface intersecting said side boundary surfaces.
  • a needle according to claim 15, wherein said hook includes a base surface disposed substantially perpendicular to the longitudinal axis of said shaft, said base surface interconnecting said side boundary surfaces.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US00101250A 1969-12-24 1970-12-24 Looping machine with spring beard needle Expired - Lifetime US3731642A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19691964980 DE1964980A1 (de) 1969-12-24 1969-12-24 Kettelmaschine mit Hakennadel
US10125070A 1970-12-24 1970-12-24

Publications (1)

Publication Number Publication Date
US3731642A true US3731642A (en) 1973-05-08

Family

ID=25758285

Family Applications (1)

Application Number Title Priority Date Filing Date
US00101250A Expired - Lifetime US3731642A (en) 1969-12-24 1970-12-24 Looping machine with spring beard needle

Country Status (2)

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US (1) US3731642A (de)
FR (1) FR2073736A5 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5415330A (en) * 1992-01-29 1995-05-16 Rosso Industrie S.P.A. Feeder for guiding stockings in looping machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1592249A (en) * 1976-12-31 1981-07-01 Mathbirk Ltd Linking machines

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2050563A (en) * 1934-10-15 1936-08-11 Southern Textile Machinery Com Looper
US2318586A (en) * 1942-06-25 1943-05-11 Vanity Fair Mills Inc Pointed bearded knitting machine needle
US2781957A (en) * 1952-06-30 1957-02-19 Szen Anastasia S Le Reweaving needles
FR1330775A (fr) * 1962-05-04 1963-06-28 Vyzk Ustav Bavlnarsky Aiguille en deux parties pour travaux de tissage, notamment pour brochage et procédés de fabrication de cette aiguille
US3503353A (en) * 1962-02-12 1970-03-31 Matthews & Birkhamshaw Ltd Linking needle for chain stitch linking machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2050563A (en) * 1934-10-15 1936-08-11 Southern Textile Machinery Com Looper
US2318586A (en) * 1942-06-25 1943-05-11 Vanity Fair Mills Inc Pointed bearded knitting machine needle
US2781957A (en) * 1952-06-30 1957-02-19 Szen Anastasia S Le Reweaving needles
US3503353A (en) * 1962-02-12 1970-03-31 Matthews & Birkhamshaw Ltd Linking needle for chain stitch linking machine
FR1330775A (fr) * 1962-05-04 1963-06-28 Vyzk Ustav Bavlnarsky Aiguille en deux parties pour travaux de tissage, notamment pour brochage et procédés de fabrication de cette aiguille

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5415330A (en) * 1992-01-29 1995-05-16 Rosso Industrie S.P.A. Feeder for guiding stockings in looping machines

Also Published As

Publication number Publication date
FR2073736A5 (de) 1971-10-01

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