US3821972A - Method of picking weft yarns in shuttleless looms - Google Patents

Method of picking weft yarns in shuttleless looms Download PDF

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Publication number
US3821972A
US3821972A US00181154A US18115471A US3821972A US 3821972 A US3821972 A US 3821972A US 00181154 A US00181154 A US 00181154A US 18115471 A US18115471 A US 18115471A US 3821972 A US3821972 A US 3821972A
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United States
Prior art keywords
shed
weft
weft thread
pressure fluid
length
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Expired - Lifetime
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US00181154A
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English (en)
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V Svaty
J Libansky
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Elitex Zavody Textilniho
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Elitex Zavody Textilniho
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay

Definitions

  • This invention relates to a method and apparatus for inserting weft threads into the shed formed on a shuttleless loom.
  • the invention relates to a method'and apparatus for inserting weft threads in which initial insertion into the shed is achieved by either a primary pressure fluid flow, such as air flow or rotary feeding rollers which cause the thread to move into a guiding channel formed by a comb having a plurality of plates and openings and then to be subsequently carried through the channel and the shed by a plurality of successive pressure fluid streams in a selectively controlled and directed manner.
  • a primary pressure fluid flow such as air flow or rotary feeding rollers which cause the thread to move into a guiding channel formed by a comb having a plurality of plates and openings and then to be subsequently carried through the channel and the shed by a plurality of successive pressure fluid streams in a selectively controlled and directed manner.
  • the thread end is picked and thrown through the shed with its end free.
  • a flow of compressed air is employed to carry the weft thread through the shed by the effect of the air flow.
  • the air leaves a nozzle located on one side of the machine in an abrupt manner and passes through a comb having a plurality of plates and openings inserted into the shed before the weft thread is picked up.
  • the individual plates and openings of the comb form a guiding channel for the weft, as well as for the compressed air flowing from the nozzle, minimizing loss of air due to dissipation.
  • nozzles are usually concentrated at the side opposite to the main pickup nozzle which commits the primary pressure fluid.
  • some known systems utilize a set of semi-circular rotary nozzles which are chambered at their ends to facilitate penetrating the warp threads, the nozzles being arranged below the warp on pivots which simultaneously supply the secondary pressure fluid and includes means attached to the nozzles to impart to them a reversing rotary motion synchronously with the drive of the machine, thus opening a passage for the fluid into the nozzles.
  • a common disadvantage of all pneumatic weft inserting systems such as those mentioned above resides in the fact that the weft is not acted upon by the flow of the secondary carrying pressure medium in such a manner as to be continuously drawn into the shed by its front part; but rather the weft is acted upon throughout the overall length by a system of plural, longitudinally arranged nozzles into which the secondary pressure fluid is fed either periodically, simultaneously or continuously.
  • This manner of distributing the secondary carrying pressure fluid is disadvantageous since it does not supply the needed air and does not insure that the weft, upon its advancement through the shed, will not take upa wave shape and will not be caught by the warp threads or the plates of the guiding comb.
  • It is still another object of the invention to provide apparatus for inserting weft threads which includes a distributor for a pressure fluid connected to nozzles mounted on the batten of a loom and adapted to successively and selectively direct a plurality of pressure fluid flows in a guiding channel formed by a guiding comb.
  • a system for weft insertion wherein the forces acting upon the weft as driving forces are at a maximum at the front part of the weft and gradually disappear in the direction towards its rear part so that the weft is straightened and pulled during its picking so that the front part of the weft picked by a primary system is taken over in the course of its movement through the shed by secondary flows of a pressure carrying fluid which are selectively controlled to operate successively and are oriented substantially longitudinally in the direction of movement of the weft through the shed.
  • a method and apparatus provided by which the weft thread is picked up and caused to be carried through a portion of the shed by a primary device and through the remaining portion of the shed by a plurality of successive, pressurized fluid flow streams in a selected and predetermined manner acting on the front end of the thread.
  • the secondary flow streams are directed through the combs of .the shed and act on the weft as the weft is guided through the channel formed by the combs.
  • FIG. 1 is a schematic, cross-sectional view in elevation illustrating a batten on a shuttleless loom and showing the comb and a nozzle for supplying a secondary pressure fluid, both being mounted along with the reed on the batten in accordance with the present invention
  • FIG. 2 is a schematic, cross-sectional view in elevation of an embodiment of a distributor for the secondary pressure fluid
  • FIG. 3 is a schematic, cross-sectional plan view of the distributor shown in FIG. 2 and taken across line 22 thereof;
  • FIG. 4 is a schematic, cross-sectional view in elevation of the embodiment shown in FIG. 1 employing individual sensing means and valves to activate and deactivate the secondary pressure fluid, and
  • FIG. 5 is a perspective view of weaving shed with a plurality of jet nozzles schematically shown.
  • a method for inserting weft threads in the shed formed on a shuttleless loom which comprises contacting a weft thread with means for picking up and carrying the thread through at least part of the length of the shed in a substantially longitudinal direction and then contacting the front part of the thread with a plurality of successive pressure fluid flows and carrying the weft thread in a selectively controlled and directed manner in a substantially longitudinal direction through the remaining portion of the length of the shed.
  • apparatus for accomplishing the method comprises a batten l which is fastened by means of screws or bolts 2 on the slay arms 3 of a shuttleless loom in a known manner.
  • the batten swings on a batten shaft 4 and is provided with longitudinal grooves 5 and 6.
  • Groove 5 supports a reed 7 which is fastened therein by bolts 8.
  • Groove 6 supports a guiding comb 9 having a plurality of separate plates, one being shown at 10 which form openings.
  • the plates constitute a continuous channel 11 which is interrupted only by the gaps between the separate plates and which are penetrated by warp threads 12 as soon as the guiding comb 9 is immerged into the shed 13 when the batten 1 moves from front dead center to rear dead center.
  • Pneumatic nozzles 14 are located serially from one end of channel 11 to the other in the space between the reed 7 and the guiding comb 9 and are each oriented obliquely with respect to the guiding channel 11.
  • Each of the nozzles 14 are constituted by openings '14 in tubes 15 to supply a secondary carrying pressure fluid, such as air, serially along the channel 11.
  • the tubes 15 are closed at their upper ends 16 and are fastened in any suitable manner into the batten 1, each tube being connected by a flexible hose 17 to the separate outlets 18, 18a, 18c, etc. of a distributor 19 which functions to distributed the secondary carrying pressure fluid from a source of fluid under pressure.
  • the distributor has as many outlets 18, etc. as the number of nozzles 14 arranged along the length of the channel 11.
  • the distributor 19, which is situated aside batten l, is constituted in the embodiment shown by a pressure vessel having a hollow interior 20 covered by a lid 21.
  • a rotary slide valve 22 is disposed in the interior 20. Rotary motion is imparted in the slide valve through shaft 23, which is synchronized with the conventional main shaft of the weaving machine via a suitable gear train.
  • the rotary slide valve 22 is provided with a bypass opening 24 which is of sufficient size to cover at least two outlets 18, 18a, etc. situated beside each other in the distributor 19. i
  • an extension conduit 25 mounted on the lid 21 of distributor 19 is provided.
  • the source of pressure may be a pump or a container of compressed air.
  • pressure control means by which tee pressure flow may be regulated as to volume and degree of pressure. ln some embodiments, it may be helpful to regulate the degree of pressure successively to each of the serially arranged nozzles 14. The embodiment shown, thus far, operates synchronously with the loom being responsive to the main drive shaft via the connecting gear train.
  • the distributor 19 can be replaced by a system of valves for each or for one or more of the nozzles.
  • the operation of the valves is controlled by various detecting elements which would respond not to the main loom drive but to the movement of the weft 26 in the shed 13.
  • the detecting elements can be sensors of any known construction. For example, pneumatic, capacitor, photoelectric or similar types which emit impulses corresponding to the presence and/or movement of weft 26.
  • the impulses may be supplied to the separate valves which secure the serial operation of the appropriate nozzles 14 distributed at suitable distances along the guiding channel 11 in the guiding comb 9.
  • the nozzles may also act simultaneously as weft stop motions.
  • a schematic showing such a system is seen in FIG.
  • a sensor 27 is placed within the comb plate 10 and is connected to a transducer or similar device 28 which in turn produces a signal impulse responsive to the sensing by sensor 27 of the weft 26.
  • the transducer signal impulse is transmitted to a valve 29 operated by a solenoid or other convenient device to pass a burst of air from the source 30 into the appropriate conduit, such as 18.
  • the pressure regulating or control valve 31 may be inserted between the source 30 and each of the valves 29. This latter valve 31 is also connected to the sensors 27 so that the degree of pressure may be varied in accordance with the nozzle 14.
  • the sensors 27, the pressure control valve and other features may also be used with the distributor system shown in FIGS. 2 and 3.
  • the transducer 28 amplifies and produces a signal impulse and controls the length and timing of the signal so that a selective one or more of the valves 29 are open to let air pass into the nozzles 14 in a selected and predetermined manner.
  • weft 26 is abruptly ejected into the guiding channel 11 in the guiding comb 9, such as by means of an air nozzle (not shown) for the primary carrying pressure fluid, or with rotating feeding rollers or any other similar device, the distributor port 18 in the distributor 19 is opened by means of the rotary slide valve 22.
  • the carrying pressure fluid passes through tube or hose 17 into the nozzle 14, which is arranged at immediate proximity of the primary weft picking system.
  • the front end of weft 26 is surrounded by a secondary carrying stream which entrains the front part of weft 26 and carries it longitudinally to the next following nozzle 14.
  • weft 26 is gradually handed over and seriation from one nozzle 14 to the next following nozzle, etc. by the substantially longitudinally directed flow of the secondary carrying pressure stream until the weft reaches the end of the guiding channel 11 in the guiding comb 9.
  • the oblique direction of nozzle 14 enhances the forward flow.
  • the coordination of the correct inlet of air through the nozzle 14 (and successive similar nozzles) into channel 11 with the picking of the weft through the channel so that the maximum driving effect acts always upon the front part of weft 26 can be achieved by monitoring the picking of the front part of weft 26 by the system shown in FIG. 4.
  • the photocell, a pneumatic sensor, a capacitory sensor or other sensor 27, etc. which emits a signal upon the picking of the front end may be transformed and amplified to control the valves in order to admit air into the nozzles at that moment, at which weft 26 runs with its front end beside the appropriate nozzle.
  • the weft thread need only be thrown through a portion of the shed by the primary picking means (be it pneumatic, roller or other means).
  • the rest of the throw or pick is effected by the action of the successively actuated flow streams on the front end of the weft.
  • the front end of weft is always under the influence of a pressurized entraining fluid which has greater force or velocity than the flow streams acting on any other part of the weft.
  • the valve distributor system of FIGS. 2 and 3 and the sensor-valve controlsystem of FIG. 4 insure an efficient, selective and predetermined flow stream at the front end of the weft whenever required.
  • the nozzles 14 may be varied in size, the valve openings 18 may be varied in size and/or the pressure regulated by increasing or decreasing pressurizing means so that the flow along channel 11 is regulated.
  • the advantage of the instant method of picking weft resides in the fact that the weft is pulled by its front end during the entire time of its travel through shed 13 and thus cannot form loops or waves; nor can it be caught up by warp 12 or by the plate of guiding comb 9. This results, consequently, in a higher quality of fabric.
  • a further advantage resides in the fact that weft threads can be carried through greater distances and larger widths since the driving effect of the secondary carrying pressure fluid upon the weft lasts for the entire time it moves through shed 13.
  • the picking velocity is also faster in comparison to conventional picking methods since the velocity of the driving flow of the secondary carrying pressure fluid does not diminish during the whole time and length of weft picking.
  • the increase of picking width and picking velocity results in increased efficiency of the weaving machine.
  • the successive supply of the secondary carrying pressure fluid to the separate nozzles such as nozzle 14 is advantageous since it accomplishes the supply of needed fluid which is not so in hitherto known methods, or by the continuous supply of carryingpressure fluid simultaneously to all nozzles 14.
  • Apparatus for inserting weft threads in the shed formed on a shuttleless weaving loom having a batton comprising means for picking up and carrying a weft thread through at least part of the length of the shed, a comb having a plurality of plates supported on said batten, said comb forming a guiding channel for said weft thread upon being periodically inserted in said shed, a plurality of noule means supported on said batten for directing a plurality of individual pressure fluid flows into said guiding channel, valve means connected to the nozzle means for activating and deactivating the individual nozzle means and means for successively controlling said valves to exert a fluid flow on the leading end of said weft thread whereby said weft thread may be pulled from its leading end in a selectively controlled and directed manner through said shed.
  • nozzle means for directing a plurality of pressure fluid flows into the guiding channel comprises, a plurality of independent nozzles serially mounted on the batten, each being directed obliquely into said guiding channel.
  • Apparatus as defined in claim 8 including sensing elements located adjacent the plates of the guiding comb to selectively control activation and deactivation of the nozzles.
  • Apparatus as defined in claim 9 including means for regulating the pressure in each of said nozzles.
  • valve means for activating and deactivating the nozzle means for directing the plurality of pressure fluid flows is a distributor connected to a source of pressure fluid and connected through hoses to the nozzle means and includes a rotary slide valve synchronized with the movement of the main shaft of the shuttleless loom.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00181154A 1970-09-18 1971-09-16 Method of picking weft yarns in shuttleless looms Expired - Lifetime US3821972A (en)

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Application Number Priority Date Filing Date Title
CS6368A CS165002B1 (enrdf_load_stackoverflow) 1970-09-18 1970-09-18

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US (1) US3821972A (enrdf_load_stackoverflow)
CH (1) CH533705A (enrdf_load_stackoverflow)
CS (1) CS165002B1 (enrdf_load_stackoverflow)
DE (1) DE2145256A1 (enrdf_load_stackoverflow)
NL (1) NL7112822A (enrdf_load_stackoverflow)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2314281A1 (fr) * 1975-06-10 1977-01-07 Vyzk Vyvojovy Ustav Zavodu Installation pour la commande d'organes actifs de canal d'introduction de trame dans un metier a buses d'injection
FR2326642A1 (fr) * 1975-10-01 1977-04-29 Vyzk Vyvojovy Ustav Zavodu Distributeur-repartiteur de fluide sous pression a plusieurs soupapes rotatives, notamment pour metier a tisser pneumatique
US4085777A (en) * 1973-07-24 1978-04-25 Vyzkumny A Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi Arrangement for the control of weft introduced into looms
JPS53137260U (enrdf_load_stackoverflow) * 1977-03-31 1978-10-30
US4183382A (en) * 1976-02-27 1980-01-15 Walter Scheffel Apparatus for weft insertion in a weaving loom
DE3010249A1 (de) * 1979-03-17 1980-09-25 Toyoda Automatic Loom Works Vorrichtung zum fuehren eines schussfadens in einem jet-webstuhl
US4244402A (en) * 1978-02-27 1981-01-13 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Device for inserting a weft yarn in jet operated weaving machines
US4245677A (en) * 1978-02-10 1981-01-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and apparatus for supplying transport fluid to auxiliary jet nozzles in a jet loom
US4262707A (en) * 1978-02-10 1981-04-21 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method for injecting transport fluid into a shed from auxiliary jet nozzles
DE3113592A1 (de) * 1980-04-11 1982-03-18 Nissan Motor Schussfaden-eintragvorrichtung fuer eine duesenwebmaschine
DE3141209A1 (de) * 1980-10-16 1982-06-09 Mcginley Thomas F Webverfahren und webstuhl zur durchfuehrung des verfahrens
US4445546A (en) * 1980-12-17 1984-05-01 Sulzer Brothers Limited Method of operating a weaving machine
US4465110A (en) * 1981-01-13 1984-08-14 Ruti-Te Strake, B.V. Jet weaving machine
EP0100542A3 (en) * 1982-08-04 1985-05-22 Nissan Motor Company, Limited Weft picking device of air jet weaving loom
US4787423A (en) * 1985-07-05 1988-11-29 Elitex Koncern Textilniho Strojirenstvi Method of and device for inserting weft yarn in jet looms
US20080216912A1 (en) * 2005-01-21 2008-09-11 Picanol N.V. Device for the Picking of Weft Threads in an Air Jet Weaving Machine
US20080271807A1 (en) * 2006-09-07 2008-11-06 Sultex Ag Method and a stretching device for the holding of a weft thread
US20090272456A1 (en) * 2005-10-05 2009-11-05 Francisco Speich Weaving Machine Comprising Pneumatic Weft Insertion

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7503375A (nl) * 1975-03-20 1976-09-22 Rueti Te Strake Bv Weefmachine van het type, waarbij de inslag- draden met behulp van een stromend medium door het weefvak worden getransporteerd.
NL7904374A (nl) * 1978-06-12 1979-12-14 Scheffel Walter Werkwijze en inrichting voor de inbreng van de inslag bij weefmachines met behulp van een stromend medium.
DE2825679C2 (de) 1978-06-12 1983-11-10 Walter 8832 Weissenburg Scheffel Vorrichtung zum Schusseintrag an Webmaschinen mittels eines strömenden Mediums
US4391305A (en) * 1979-05-18 1983-07-05 Nissan Motor Co., Ltd. Weft picking device of air jet type weaving loom
JPS5691038A (en) * 1979-12-26 1981-07-23 Nissan Motor Wefting method of air jet type loom
DE3067361D1 (en) * 1980-10-02 1984-05-10 Sulzer Ag Control device for the nozzles of a jet-projection loom
EP0053216B1 (de) * 1980-11-28 1984-03-14 GebràœDer Sulzer Aktiengesellschaft Hilfsblasdüse für eine Luftstrahlwebmaschine
EP0079999B1 (de) * 1981-11-25 1986-02-26 GebràœDer Sulzer Aktiengesellschaft Steuereinrichtung für die Düsen einer Strahleintrags-Webmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139118A (en) * 1958-05-09 1964-06-30 Svaty Vladimir Pneumatic weft guides for looms
US3140636A (en) * 1962-09-20 1964-07-14 Kaynar Mfg Co Twelve-point nut
US3229725A (en) * 1963-02-06 1966-01-18 Saito Hifumi Weaving machines
US3482606A (en) * 1966-06-18 1969-12-09 Nissan Motor Multi-weft fluid jet loom
US3705608A (en) * 1969-10-22 1972-12-12 Geert Jan Vermeulen Method for transporting a weft thread through a weaving shed and a loom for performing said method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139118A (en) * 1958-05-09 1964-06-30 Svaty Vladimir Pneumatic weft guides for looms
US3140636A (en) * 1962-09-20 1964-07-14 Kaynar Mfg Co Twelve-point nut
US3229725A (en) * 1963-02-06 1966-01-18 Saito Hifumi Weaving machines
US3482606A (en) * 1966-06-18 1969-12-09 Nissan Motor Multi-weft fluid jet loom
US3705608A (en) * 1969-10-22 1972-12-12 Geert Jan Vermeulen Method for transporting a weft thread through a weaving shed and a loom for performing said method

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085777A (en) * 1973-07-24 1978-04-25 Vyzkumny A Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi Arrangement for the control of weft introduced into looms
FR2314281A1 (fr) * 1975-06-10 1977-01-07 Vyzk Vyvojovy Ustav Zavodu Installation pour la commande d'organes actifs de canal d'introduction de trame dans un metier a buses d'injection
US4020877A (en) * 1975-06-10 1977-05-03 Vyzkumny A Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi Weft injection sequence controller for a fluid-jet loom
FR2326642A1 (fr) * 1975-10-01 1977-04-29 Vyzk Vyvojovy Ustav Zavodu Distributeur-repartiteur de fluide sous pression a plusieurs soupapes rotatives, notamment pour metier a tisser pneumatique
US4143681A (en) * 1975-10-01 1979-03-13 Vyzkumny A Vyvojovy Ustav Zavodu Vseobecneho Strojirenstyl Apparatus for distributing pressurized fluid to a multi-element weft inserter
US4183382A (en) * 1976-02-27 1980-01-15 Walter Scheffel Apparatus for weft insertion in a weaving loom
US4328842A (en) * 1976-02-27 1982-05-11 Walter Scheffel Apparatus for weft insertion in a weaving loom
JPS53137260U (enrdf_load_stackoverflow) * 1977-03-31 1978-10-30
US4262707A (en) * 1978-02-10 1981-04-21 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method for injecting transport fluid into a shed from auxiliary jet nozzles
US4245677A (en) * 1978-02-10 1981-01-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and apparatus for supplying transport fluid to auxiliary jet nozzles in a jet loom
US4244402A (en) * 1978-02-27 1981-01-13 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Device for inserting a weft yarn in jet operated weaving machines
DE3010249A1 (de) * 1979-03-17 1980-09-25 Toyoda Automatic Loom Works Vorrichtung zum fuehren eines schussfadens in einem jet-webstuhl
US4440198A (en) * 1979-03-17 1984-04-03 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Apparatus for guiding weft yarns in a jet loom
DE3113592A1 (de) * 1980-04-11 1982-03-18 Nissan Motor Schussfaden-eintragvorrichtung fuer eine duesenwebmaschine
DE3141209A1 (de) * 1980-10-16 1982-06-09 Mcginley Thomas F Webverfahren und webstuhl zur durchfuehrung des verfahrens
US4445546A (en) * 1980-12-17 1984-05-01 Sulzer Brothers Limited Method of operating a weaving machine
US4465110A (en) * 1981-01-13 1984-08-14 Ruti-Te Strake, B.V. Jet weaving machine
EP0100542A3 (en) * 1982-08-04 1985-05-22 Nissan Motor Company, Limited Weft picking device of air jet weaving loom
US4787423A (en) * 1985-07-05 1988-11-29 Elitex Koncern Textilniho Strojirenstvi Method of and device for inserting weft yarn in jet looms
US20080216912A1 (en) * 2005-01-21 2008-09-11 Picanol N.V. Device for the Picking of Weft Threads in an Air Jet Weaving Machine
US7726351B2 (en) * 2005-01-21 2010-06-01 Picanol N.V. Device for the picking of weft threads in an air jet weaving machine
US20090272456A1 (en) * 2005-10-05 2009-11-05 Francisco Speich Weaving Machine Comprising Pneumatic Weft Insertion
US20080271807A1 (en) * 2006-09-07 2008-11-06 Sultex Ag Method and a stretching device for the holding of a weft thread

Also Published As

Publication number Publication date
CS165002B1 (enrdf_load_stackoverflow) 1975-11-28
DE2145256A1 (de) 1972-03-23
CH533705A (de) 1973-02-15
NL7112822A (enrdf_load_stackoverflow) 1972-03-21

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