US3626990A - Method and apparatus for intermittently feeding measured lengths of weft thread from a supply bobbin to an injector for injection into a storage-type shuttle - Google Patents

Method and apparatus for intermittently feeding measured lengths of weft thread from a supply bobbin to an injector for injection into a storage-type shuttle Download PDF

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Publication number
US3626990A
US3626990A US858455A US3626990DA US3626990A US 3626990 A US3626990 A US 3626990A US 858455 A US858455 A US 858455A US 3626990D A US3626990D A US 3626990DA US 3626990 A US3626990 A US 3626990A
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thread
shuttle
drum
injector
roll
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US858455A
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English (en)
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Adolf Linka
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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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/26—Travelling-wave-shed looms
    • D03D47/261—Preparation of weft

Definitions

  • the present invention relates to a method, and to apparatus to carry out the method, to periodically supply measured length of weft thread to a continuously movable shuttle by means of a pneumatic injector.
  • the weft thread can be injected into the storage magazine of the shuttle with substantial speed by means of pneumatic injection; it is, however, necessary to accurately measure the length of the picks and to synchronize the supply of the picks to the injection with the movement of the shuttle itself, so that the shuttle will be supplied with the proper length of thread during the time that it is actually beyond the shed.
  • Pneumatic injection apparatus to introduce a pick into the shed itself, and cooperating with measuring devices are known; the length of thepick determines the width of the material which is being woven.
  • These devices and apparatus do not, however, cooperate with shuttles so that the conditions under which they operate are entirely different from those where the weft thread is guided by a shuttle.
  • Introducing a certain, measured length of weft thread into the storage magazine of a shuttle by means of pneumatic injectors requires periodically measuring a thread length and simultaneously delivering the thread with predetermined unifonn speed to the injector, so that the thread can be transported into the magazine of the shuttle. Measuring systems and methods which supply a predetermined length of material to the injector with uncontrolled speed are therefore not suitable for introduction into the storage magazine of a shuttle.
  • a thread is guided over a rotating drum which may have a conical surface; rotation of the drum is synchronized with movement of the shuttle and a presser roller is resiliently urged to press the thread between the roller and the surface of the drum when thread is to be fed. Movement of the presser roller in engagement with the drum surface (and thus causing feed of the thread) is controlled by a cam and camfollower arrangement secured to the weaving loom itself so that frictional engagement of the thread with the drum will always be synchronized with shuttle motion as determined by machine speed.
  • the thread, supplied by the drum when in contact with the roller is-then supplied to an injector which introduces the thread itself into the shuttle. Since the drum is rotating constantly, only the small mass of the presser roller need to be moved, or accelerated so that little inertia has to be overcome and wear and tear on the movable parts is minimized.
  • the drum itself rotates continuously, driven by the loom; the presser roller will continue to rotate due to its inertia even when lifted off contact with the drum, so that its peripheral speed at the next working cycle when thread is to be supplied will be only slightly less than that of the drum, thus causing a minimum amount of relative friction and thus wear and tear.
  • the force with which the presser roller engages the surface of the drum is best set to be a predetermined amount by controlling the pressure of a spring.
  • the surfaces of the drum and the presser roller are so chosen that one is smooth and hard, whereas the other one is elastic and adhering, for example by forming the surface of the drum of hard chrome steel, whereas the surface of the roller is covered with rubber or plastic material.
  • the method, as well as the apparatus can be used for circular looms, as well as for linear looms having a continuous shuttlle drive.
  • FIGS. 1 and 2 correspond to FIGS. 1 and 2 of the aforementioned Czchechoslovakian Pat. No. 84,859, and show a vertical section, and a plan view, respectively, of a suitable shuttle;
  • FIG. 3 illustrates, schematically, in perspective view a thread injection mechanism in accordance with the present invention, and in connection with which the method of the present invention can be explained; a cutting device to cut the thread to appropriate length has been omitted from the showing of the drawing, since such cutters, and their control, themselves, are well known and a suitable location can be selected, with respect to the injector, in accordance with design requirements of the machine as a whole, if such cut off apparatus is desired.
  • the sidewalls 101 of the shuttle 102 have uniformly distributed transverse walls 103 arranged therein, in slanting arrangement and parallel to each other.
  • the front portion of the shuttle 102 has a tongue-shaped blade 105 secured thereto, as counterelement to a cutter plate 107 with an opening 106 above the path of the shuttle 102 to cut off the preceding shuttle thread.
  • This arrangement to insert the pick is provided in the space between the sections of a loom, such as a circular weaving machine, one to each such space.
  • an injector 108 is supplied :in which the required length of the pick 109 is delivered by a length-measuring device.
  • a valve not shown, opens the air supplied to the injector as soon as the shuttle is therebellow.
  • the valve can be operated in various ways, for example: an arm of a contact 1112 extends into the space between the sections of the weaving loom. By operating the contact I12, an electromagnetic valve for compressed air is opened. As soon as the shuttle has passed by, contact 112 opens and the valve closes.
  • the injector preferably is made of glass which, in contrast to otherwise utilized metallic injectors, is much cheaper.
  • the edges of the transverse walls 103 are roughed, so that, upon later pulling off the pick, a suitable braking effect is obtained, which also prevents slipping.
  • the transverse walls 103 separate the loops of the thread from each other and prevent matting.
  • the angle of the slanted transverse walls is determined by aerodynamic consideration and, preferably, suitably slanted when the injector is fixed (as seen) at M, FIGS. 1 and 3) for shuttle movement in one direction.
  • the shuttle After supply of this requisite length of the shuttle, the shuttle travels past contact 112 and supply of compressed air is blocked and the inserted pick 109 is woven. As soon as the next shuttle arrives under the injector 108, the shuttle thread of the preceding shuttle is cut since it passes through the cutting opening 106 of plate 107 which passes by edge 105 of the shuttle. Simultaneously, the pulse to open the valve occurs, and the device supplies the shuttle thread to the next shuttle.
  • the high speed with which the shuttle thread can be supplied by the injector can, practically, not be fully utilized. it is therefore necessary that the speed with which the thread is inserted in the shuttle depends not on the speed of the air, but rather is adjustable with respect to the speed of weaving. This is obtained by determining the speed of the supply of the thread only by the supply speed of the measuring device with which the thread is delivered to the injector.
  • Afixed supply bobbin 1 supplies thread 6 to a pneumatic injector, the amount of weft thread 6 being supplied to the magazine 4 of shuttles 5 being predetermined. Thread 6 is guided over the surface of a drum 7.
  • Drum 7 has a hard chrome surface which is smooth, it may be cylindrical; preferably drum 7 has a conical surface.
  • Drum 7 cooperates with a pressure roller 8 which is journaled to be freely running on a bent-over arm of a level 9.
  • lever 9 is rotated to move the roller 8 against the surface of the drum 7, so that the thread 6 is frictionally engaged between the surface of drum 7 and roller 8 to be transported thereby.
  • the surface of roller 8 is preferably elastic, somewhat adhering material such as rubber or plastic.
  • Lever 9 is rotatably held in bearing blocks 10, 11, secured against axial movement and swingably mounted therein.
  • An extension of lever 9 carries a roller 12, functioning as a cam follower and engaging a cam surface 18 fixed to the rotor 14 of a circular loom, or if the device is to be associated with a straight-loom to an equivalent movable drive.
  • Lever 9 carries a pin 15 which is secured to a spring 17, held in a bracket 16; spring 17 has the tendency to urge lever 9 to swing in a direction such that presser roller 8 will engage the surface of drum 7, as well as to urge cam follower 12 in engagement with cam 13.
  • Cam 13 is arranged in such a manner that the high points, or lands thereof lift presser roller 8 off the surface of drum 7, against the tension of spring 17.
  • the position of the cam is synchronized with the movement of the shuttle 5, or its shuttle storage magazine 4, respectively, in such a manner that thread can be injected into the storage magazine when the shuttle is in a proper position outside of the shed.
  • the position of injector 2 is so chosen that shuttle 5 can accept the entire length of the weft thread before passing into the shed (not shown in the drawings).
  • presser roller 8 When presser roller 8 is lifted off the surface of drum 7, thread 6 will slide over the smooth surface of the drum which is driven constantly.
  • the thread itself is held against creeping by a thread brake schematically shown at 18.
  • a thread guide 19 is located in advance of the drum 7, to guide the position of the thread on the surface of the drum;
  • 1 thread guide 19 is adjustable in an axial direction (with respect to the axis of the drum 7) as schematically indicated by an adjustment wheel 20 so that the surface region of the drum to which the thread is being applied can be selected.
  • the amount of thread being supplied can be chosen. At positions where the diameterof the drum 7 is smaller, the amount of thread being supplied during the time period that roller 8 engages the surface of the drum, will be less.
  • Method of intermittently feeding measured lengths of weft thread from a supply bobbin through an injector and placing the thread into a shuttle comprising guiding the measured length of thread in a path from the bobbin to the injector over a rotating drum, the injector being fixedly mounted;
  • Apparatus to feed a measured length of weft thread (6) from a supply bobbin (1) into a driven shuttle (5) comprising an injector (2) having said thread (6) fed therethrough;
  • a continuously rotating drum (7) located in the path of the thread form the supply bobbin (1) to the injector (2);
  • a contact roll (8) movable between a contacting position to press said thread into frictional contact with the surface of the drum and a free position permitting said drum to rotate beneath said thread without engagement therewith;
  • said means connected to said shuttle drive includes a cam track (13) driven in synchronism with the drive of the shuttle (5 and a cam follower (12) interconnected with said roller and in engagement with said cam track.
  • Apparatus according to claim 4 including a lever having a bent-away end, said roller being mounted on the end of said lever;
  • cam follower being connected to said lever to swing said lever about its axis and thus swing said roll at the end of said lever between said positions.
  • said means connected with said roll and shuttle drive includes means (17) resiliently pressing said roll into contact with said drum;
  • Apparatus according to claim 3 including thread guide means (19) and a thread brake (18) located in the path of the thread between the bobbin (1) and said drum.
  • Apparatus according to claim 3 wherein said drum (7) and a thread guide (19) is provided in the path of the thread and said roll (8) have cooperating surfaces, one surface being of h drum n axia ly j le Wi h respect to the drum to hard and smooth and the other elastic and adh ri adjust the position thereof with respect thereto and thus affect 10.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US858455A 1968-09-20 1969-09-16 Method and apparatus for intermittently feeding measured lengths of weft thread from a supply bobbin to an injector for injection into a storage-type shuttle Expired - Lifetime US3626990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681785416 DE1785416A1 (de) 1968-09-20 1968-09-20 Verfahren und Vorrichtung zur periodischen Lieferung abgemessener Schussfadenlaengen von einer Spule in einen den Schussfaden in einen kontinuierlich bewegten Schuetzen eintragenden pneumatischen Injektor

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US3626990A true US3626990A (en) 1971-12-14

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US858455A Expired - Lifetime US3626990A (en) 1968-09-20 1969-09-16 Method and apparatus for intermittently feeding measured lengths of weft thread from a supply bobbin to an injector for injection into a storage-type shuttle

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US (1) US3626990A (fr)
BE (1) BE739155A (fr)
CH (1) CH500309A (fr)
DE (1) DE1785416A1 (fr)
ES (1) ES371565A1 (fr)
FR (1) FR2018506A1 (fr)
GB (1) GB1276916A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715742C1 (de) * 1987-05-12 1988-06-01 Dornier Gmbh Lindauer Verfahren und Vorrichtung zum Speichern eines Schussfadenstueckes in einem Schussfadenmagazin eines Schussfadentraegers
DE3718306C1 (de) * 1987-05-30 1988-07-07 Dornier Gmbh Lindauer Mehrsystemige Webmaschine mit permanentmagnetischem Schussfadentraegerantrieb
DE3721309C1 (de) * 1987-06-27 1988-07-21 Dornier Gmbh Lindauer Vorrichtung zur wahlweisen Lieferung abgemessener Laengen wenigstens zweier verschiedener Schussfaeden fuer die Schussfadentraeger einer mehrsystemigen Webmaschine
DE3718307C1 (de) * 1987-05-30 1988-07-21 Dornier Gmbh Lindauer Mehrsystemige Webmaschine
DE3721310C1 (de) * 1987-06-27 1988-09-29 Dornier Gmbh Lindauer Vorrichtung zur periodischen Lieferung abgemessener Schussfadenlaengen fuer eine mehrsystemige Webmaschine
DE3733292C1 (de) * 1987-10-02 1989-01-19 Dornier Gmbh Lindauer Webverfahren und Webmaschine zum Herstellen von Frottiergewebe
US4815504A (en) * 1987-07-23 1989-03-28 Lindauer Dornier Gesellschaft M.B.H. Multi-system weaving loom
US4850399A (en) * 1987-06-27 1989-07-25 Lindauer Dorner Gesellschaft M.B.H. Weaving loom with pneumatic weft thread injection

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938921C2 (de) * 1979-09-26 1982-04-22 Mayer & Cie Gmbh & Co, 7470 Albstadt Einrichtung zum Laden der Schußfadenträger von Wellenfach-Webmaschinen
DE3016182C2 (de) * 1980-04-26 1983-01-05 Adolf Dipl.-Ing. 7450 Hechingen Linka Verfahren und Vorrichtung zum pneumatischen Eintragen des Schußfadens in die Schußfadenträger einer mehrsystemigen Webmaschine
ES494902A0 (es) * 1980-08-25 1981-07-01 Sitjas Vilargunte Valentin Maquina para tejer por urdimbre y trama

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715742C1 (de) * 1987-05-12 1988-06-01 Dornier Gmbh Lindauer Verfahren und Vorrichtung zum Speichern eines Schussfadenstueckes in einem Schussfadenmagazin eines Schussfadentraegers
US4817680A (en) * 1987-05-12 1989-04-04 Lindauer Dornier Gesellschaft M.B.H. Method and system for introducing a weft thread of finite length in a storage shuttle of a weaving loom
DE3718306C1 (de) * 1987-05-30 1988-07-07 Dornier Gmbh Lindauer Mehrsystemige Webmaschine mit permanentmagnetischem Schussfadentraegerantrieb
US4848410A (en) * 1987-05-30 1989-07-18 Lindauer Dornier Gesellschaft M.B.H. Magnetic shuttle drive system for a multi-system weaving loom
DE3718307C1 (de) * 1987-05-30 1988-07-21 Dornier Gmbh Lindauer Mehrsystemige Webmaschine
US4790358A (en) * 1987-05-30 1988-12-13 Lindauer Dornier Gesellschaft M.B.H. Multi-system weaving loom with permanent magnet shuttle drive
EP0297168A1 (fr) * 1987-06-27 1989-01-04 Lindauer Dornier Gesellschaft M.B.H Dispositif pour délivrer périodiquement des longueurs mesurées de fil de trame pour un métier à tisser multiple
EP0297169A1 (fr) * 1987-06-27 1989-01-04 Lindauer Dornier Gesellschaft M.B.H Dispositif pour délivrer périodiquement des longueurs mesurées d'au moins deux fils de trame différents pour l'inséreur de trame d'un métier à tisser multiple
DE3721310C1 (de) * 1987-06-27 1988-09-29 Dornier Gmbh Lindauer Vorrichtung zur periodischen Lieferung abgemessener Schussfadenlaengen fuer eine mehrsystemige Webmaschine
DE3721309C1 (de) * 1987-06-27 1988-07-21 Dornier Gmbh Lindauer Vorrichtung zur wahlweisen Lieferung abgemessener Laengen wenigstens zweier verschiedener Schussfaeden fuer die Schussfadentraeger einer mehrsystemigen Webmaschine
US4850399A (en) * 1987-06-27 1989-07-25 Lindauer Dorner Gesellschaft M.B.H. Weaving loom with pneumatic weft thread injection
US4815504A (en) * 1987-07-23 1989-03-28 Lindauer Dornier Gesellschaft M.B.H. Multi-system weaving loom
DE3733292C1 (de) * 1987-10-02 1989-01-19 Dornier Gmbh Lindauer Webverfahren und Webmaschine zum Herstellen von Frottiergewebe

Also Published As

Publication number Publication date
DE1785416A1 (de) 1972-05-04
CH500309A (de) 1970-12-15
FR2018506A1 (fr) 1970-05-29
GB1276916A (en) 1972-06-07
ES371565A1 (es) 1972-04-01
BE739155A (fr) 1970-03-02

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