US3828586A - Tension bar for warp knitting machine - Google Patents

Tension bar for warp knitting machine Download PDF

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Publication number
US3828586A
US3828586A US00341629A US34162973A US3828586A US 3828586 A US3828586 A US 3828586A US 00341629 A US00341629 A US 00341629A US 34162973 A US34162973 A US 34162973A US 3828586 A US3828586 A US 3828586A
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United States
Prior art keywords
springs
spring
bar
attached
shafts
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Expired - Lifetime
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US00341629A
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English (en)
Inventor
K Kohl
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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
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind

Definitions

  • tension bars known to the art comprise a spring-like plate which carries the turning bar at the free end thereof.
  • the path of movement of this tension bar for example, the track along which the turning bar can move is to all intents and purposes the same as the path of travel of the turned thread. This has an undesirable effect on stitch formation when there is a considerable amount of bending in the plate. It has further been found that it is extremely difficult to obtain moderate degrees of variation of spring resiliance. It is therefore very difficult to vary the properties of these springs to suit the requirements of specific stitch formations.
  • the spring plate be provided with a concave bend therein.
  • the disadvantage of this suggestion was thatthe path of the turning or carrier bar could not be altered and furthermore there was the danger that under high thread tension the plate would open up in an outward direction. It would therefore be desirable to provide a tension bar which has the characteristics of a soft spring which, when placed under increasing thread tension would tend to move in a rearward rather than a forward direction.
  • the novel tension bar device of the present invention comprises a carrier bar, a set of substantially J-shape'd spring members and a base.
  • the long portion of the spring members designated as the shafts are attached to the base member in such a manner that the shafts are parallel to each other and lie in a common plane.
  • the hook portions or short ends of the J springs are attached at the end thereof to the carrierv bar in such a manner that the axis of the carrier bar is parallel to the common plane of the shafts and perpendicular to the direction of the individual shafts.
  • FIG. 1 is a downward perspective view of one embodiment of thedevice of the present invention.
  • FIG. 2 is a downward perspective view of another embodiment of the'present invention.
  • FIG. 3 is a side elevational view of the embodiment of FIG. 1 when mounted in different operative and nonoperative positions on the machine showing the position of the thread.
  • the line drawing shows the spring and the thread in the at-rest position.
  • the dashed lines show the relative positions of the device and the thread when operating under tension.
  • the dashed and dotted position indicates an alternative positioning of the spring wherein the shaft of the spring lies above the carrier bar rather than beneath it.
  • the device of the present invention as illustrated in FIG. 1 comprises a base 20, a substantially .l-shaped spring 1 comprising a longer shaft portion 21 and a shorter hook portion 22, and a carrier bar 11. End 2 of shaft 21 is imbedded in the base and end 24 of hook portion 22 is imbedded in the carrier bar 11. All shafts 21 are imbedded in base 20 so that they lie parallel to each other in a common plane, and springs 1 being substantially of the same length and being attached at ends 24 thereof to carrier bar 11 will cause carrier bar 11 to lie parallel to the common plane of shafts 21 and perpendicular to each individual shaft 21.
  • FIG. 2 An alternate embodiment of the invention is shown in FIG. 2.
  • a flexible spring plate 14 which is attached to base plate 20 and the individual shafts 21 are attached to an edge of plate 14 thus enabling the use of shorter shaft portions on the spring.
  • the angle P between CE and CF is the bending angle between sector 21 and sector 24.
  • the angle P is at least and may, as shown in FIG. 3, be greater than
  • portion 6 is, in the principle modification shown in FIG. 3, substantially parallel to sector 21 and, in passing over carrier bar 11 is changed by approximately 90 to run in the direction and position indicated by part 7.
  • the device of the present invention can also be employed in a reverse orientation, that is to say, in place of the carrier bar 11 being above sector 21 of spring I, the spacial orientation of the device is reversed so that carrier bar 11 is under shaft 21 as illustrated in the lined and dotted orientation shown by 1".
  • a resilient bearer element is provided for the carrier or turning bar
  • it is enabled to undergo two bending stages. These comprise first, the previously known bending of the resilient carrier element and secondly thebending of the free hook element, that is to say, the short end of the J spring.
  • the turning bar itself is able to describe a longer and more desirable path whereby the rise in thread tension, for example the tension peaks during stitch formation are substantially lowered. This is especially so in the rearward settings of the guide bars and as a result the feeding of the threads to the guide bars proceeds far more quietly.
  • the forward end of the spring element lies in front of the yarn sheet which is stretched between the spring elements.
  • the springs of the prior art moved in a direction parallel to that of the yarn sheet in the device of the present invention, the spring path is diagonal to the direction of the yarn sheet.
  • a warp knitting machine comprising:
  • a carrier bar b.
  • a plurality of substantially J-shaped springs of equal length comprising a shaft portion and a short hook portion and c. base for the said springs wherein the long ends of said springs are attached to said base in an orientation where the shaft portion of the springs are mutually parallel, the hook portions of the springs lying above the shaft portions and oriented substantially upwardly and towards said base, said carrier bars being attached to the ends of said hook portion and lying upwardly of and parallel to the common plane of the shaft portions of said springs.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
US00341629A 1972-03-15 1973-03-15 Tension bar for warp knitting machine Expired - Lifetime US3828586A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722212478 DE2212478A1 (de) 1972-03-15 1972-03-15 Fadenkreuz fuer kettenwirkmaschinen

Publications (1)

Publication Number Publication Date
US3828586A true US3828586A (en) 1974-08-13

Family

ID=5838988

Family Applications (1)

Application Number Title Priority Date Filing Date
US00341629A Expired - Lifetime US3828586A (en) 1972-03-15 1973-03-15 Tension bar for warp knitting machine

Country Status (5)

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US (1) US3828586A (enrdf_load_html_response)
JP (1) JPS5122973B2 (enrdf_load_html_response)
DD (1) DD102745A5 (enrdf_load_html_response)
DE (1) DE2212478A1 (enrdf_load_html_response)
GB (1) GB1368549A (enrdf_load_html_response)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6212915B1 (en) * 1999-08-17 2001-04-10 Karl Mayer Textilmaschinenfabrik Gmbh Warp knitting machine with thread sheet turning arrangement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE512174A (enrdf_load_html_response) *
US2667772A (en) * 1951-08-14 1954-02-02 Alfred Hofmann & Co Auxiliary yarn tensioning means
US2699051A (en) * 1951-05-01 1955-01-11 Kidde Mfg Co Inc Warp tension control device for knitting machines
US2747618A (en) * 1952-02-22 1956-05-29 Fairwest U K Ltd Circular looms
US3412583A (en) * 1967-01-27 1968-11-26 Textile Machine Works Yarn tension means for warp knitting machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE512174A (enrdf_load_html_response) *
US2699051A (en) * 1951-05-01 1955-01-11 Kidde Mfg Co Inc Warp tension control device for knitting machines
US2667772A (en) * 1951-08-14 1954-02-02 Alfred Hofmann & Co Auxiliary yarn tensioning means
US2747618A (en) * 1952-02-22 1956-05-29 Fairwest U K Ltd Circular looms
US3412583A (en) * 1967-01-27 1968-11-26 Textile Machine Works Yarn tension means for warp knitting machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6212915B1 (en) * 1999-08-17 2001-04-10 Karl Mayer Textilmaschinenfabrik Gmbh Warp knitting machine with thread sheet turning arrangement

Also Published As

Publication number Publication date
DD102745A5 (enrdf_load_html_response) 1973-12-20
GB1368549A (en) 1974-09-25
DE2212478A1 (de) 1973-09-27
JPS491844A (enrdf_load_html_response) 1974-01-09
JPS5122973B2 (enrdf_load_html_response) 1976-07-14

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