US3340903A - Tensioning and regulating device for the passage of weft threads of different thickness - Google Patents

Tensioning and regulating device for the passage of weft threads of different thickness Download PDF

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Publication number
US3340903A
US3340903A US489947A US48994765A US3340903A US 3340903 A US3340903 A US 3340903A US 489947 A US489947 A US 489947A US 48994765 A US48994765 A US 48994765A US 3340903 A US3340903 A US 3340903A
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weft
tensioning
passage
lead
oscillatory
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Golobart Ramon Balaguer
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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

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  • the present invention relates to a tensioning and regulating device for the passage of weft threads of different thickness.
  • variable speed of the Weft inserting devices in shuttleless looms causes abrupt passages accompanied by the danger of breaking the weft, thus affecting the aspect of the woven fabric, especially in the case of looms with double Weft inserting member or even more if different qualities of Weft threads or those of variable thickness are to be inserted.
  • the hitherto known tensioning devices for weft threads are of static nature, i.e. they do not adjust themselves adequately to inconstant moments of the insertion of the weft thread; in general, the very weft thread or threads themselves put into operation the tensioning elements when passing, thus achieving the braking or tensioning which causes the thinning of the weft thread and in many cases even the breaking of the same.
  • the device according to the invention is secured to a fixed point on the loom by means of a gudgeon at the side where the weft thread is inserted, means being provided for the graduation of the independent regulation of tension for each thickness of the weft thread and for an easy regulation of the storage of tensioning power, as well as interchangeable and independent thread-guides which can be adapted to the thickness of each Weft thread.
  • the tension can be adjusted in timed relationship with the speeds of the weft inserting member by means of a lever, which is put into motion by a rod co-operating with a cam, which, in turn, receives its movement from a rotating shaft of the loom.
  • the outline of this cam is adapted to the sinuosities which are conditioned by the regulation of the tension of the weft threads.
  • This device may serve not only for one weft thread, but for a number of threads of different qualities and thickness.
  • the device consists of two parallel supports mounted on a base forming the whole to which the different elements are secured. These, when put into operation, cause the automatic regulation of tension for each weft thread.
  • the base is provided with even rectified plates of rather hard material which may be replaced when worn as a consequence of the passage of the weft thread.
  • the upper part of the two supports carries two fixed shafts, on one of them being freely accommodated a number of blocks, against which rest a number of thin flexible steel sheets bent at an approximately right angle, their two ends being united by an arched portion which fulfills the function of a spring in order to exert the adequate tension on the weft threads by contact with the said rectified even plates of the base at the critical moments in accordance with the movements and pressure of an oscillatory lead, to which a series of screws-one for each block-are secured, so as to serve individually for the graduation of the independent opening of the flexible sheets which may correspond to the thickness of each weft thread.
  • One end of the oscillatory lead rests on a lever provided with an adjusting slot for controlling the oscillation of the lead, the said lever being connected with one end of a rod, the other end of which carries a roller which slides on the cam of the appropriate outline for transmitting to the lead the cycle of oscillatory movements required for the regulation of the flexible sheets according to the tensioning requirements and thickness of the weft threads.
  • Each block is provided with a stud bolt carrying one projecting prolonged end of a helical spring, the coils of these springs being mounted on the other fixed shaft of the supports and each of the other ends of the springs being secured to the lateral face of a free ring of polygonal outline, which by means of as many turns as desired graduates the required tension of the helical spring for each flexible sheet.
  • One of the polygonal faces of the said ring rests on a safety plate which serves for its fastening, thus rendering impossible any accidental modification of the graduation of the whole.
  • FIG. 1 represents a sectional view of the device
  • FIG. 2 is a side elevational view from the opposite side of FIG. 1;
  • FIG. 3 is a plan view of the device with four tensioning elements with some parts in section;
  • FIG. 4 is a front elevation'al view of the device with four tensioning elements showing the replaceable threadguiding rings;
  • FIG. 5 is a sectional view similar to that of FIG. 1 showing the tensioning elements of the weft-thread in braking position;
  • FIG. 6 is a sectional view similar to that of FIG. 1 showing the tensioning elements of the weft-thread in nearly inoperative position;
  • FIG. 7 is a sectional view similar to that of FIG. 1 showing the tensioning elements of the weft-thread in completely inoperative position.
  • the device comprises a support -1 provided with a divided gudgeon 2, 3, through which it may be secured to a fixed point of the loom (not shown) by means of screws 4 (FIG. 3).
  • the support 1 is connected with an opposite support 8 through a base 5 and two fixed shafts 6 and 7.
  • the fixed shaft 6 carries a number of oscillatory blocks 9, each of which is provided with a flexible steel sheet 10, bent at an approximately right angle, their two ends being united by an arched portion 11, which fulfills the function of a spring.
  • the sheets 10 are secured to the respective block 9 by means of screws 12.
  • One end of the fixed shaft 6 carries a lever 13 provided with an adjusting slot 14 for a connecting rod 15 which is adapted to impart an oscillatory movement to the lever 13 derived from a cam (not shown).
  • This lever 13 is connected with a lead 16 which is arranged parallelly to the fixed shaft 6 and connected to a bracket 17 on the other extreme end of the fixed shaft 6.
  • a number of screws 18 with the corresponding lock nuts 1% are mounted on the lead 16 for the graduation and fastening of the flexible sheets 10 to an adequate, previously determined position and tension.
  • a stud bolt 20 is screwed to the inner face of each block 9.
  • These stud bolts simultaneously support and serve as guides for the projecting prolonged end 21 of a corresponding number of helical springs 22 arranged on the fixed shaft 7, the other end 23 (FIG. 3) of these springs 22 being secured to the lateral face 24 (FIG. 3)/ of a ring 25 of polygonal outline which by means of as many turns as desired, graduates the tension which is re quired by each flexible sheet 10.
  • the end 27 (FIG. 1) of a safety plate 26 is secured by means of screws 28 to a lead 29, the extreme ends of which are secured to the supports 1 and 8 by means of screws 28.
  • a number of even, rectified, replaceable plates 30 of rather hard material are secured to the base 5 by means of screws 31 at a ratio of one per flexible sheet 10.
  • the lower parts of the supports 1 and 8 are provided with two plates 32 and 33, one opposite the other and in parallel position to the two fixed shafts 6 and 7. These plates have circular openings, divided into two in longitudinal and diametral direction, accommodating a corresponding number of replaceable thread-guiding rings 34 and 35.
  • FIGURE 5 shows the passage of a weft thread 36 through the entry thread-guiding ring 34 and the exit thread-guiding ring 35 and under pressure between the flexible sheet 10 and the even plate 30.
  • the opening for the passage of the weft thread 36 between the flexible sheet 10 and the plate 3%) may be adjusted by the screw 18 according to the thickness of the thread and the tension to be exerted by the tension-storing spring 22 through the polygonal ring 25, finally fixed by sheet 26.
  • the raised position of the lever 13 in accordance with the cycle of movements transmitted by the cam also cooperates in the retention of the weft thread 36.
  • FIGURE 6 shows the passage of the weft thread 36 through the entry thread-guiding ring 34 and the exit thread-guiding ring 35 under the pressure of the flexible sheet 10 only and freed from the even plate 30.
  • the screw 18 is adjusted as before, the lever 13, however, has come down according to the convenient cycle of movement; thus, by means of the screw 18, the flexible sheet is raised maintaining, however, and even increasing the tension exerted by the tension-storing spring 22, so that the tension of the weft thread 36 is inferior to that represented by FIGURE 5.
  • FIGURE 7 shows the passage of the weft thread 36 through the entry thread-guiding ring 34 and the exit thread-guiding ring 35 completely free from the flexible sheet 10 and the even plate 30, due to the fact that the lever 13 has come down as far as possible, thus urging the flexible sheet 10 to rise by means of screw 1'8; the weft thread now remains completely free and untensioned as required at this critical moment of the weaving process.
  • the above-mentioned three tensioning positions may be combined as desired in one and the same insertion of weft thread; moreover, different intermediate positions in accordance with the desired graduation are possible as well.
  • Tensioning and regulating device for the passage of weft threads of different thickness, adapted to be mounted on a shuttleless loom having at least one weft inserting member, comprising two parallel supports mounted on a base provided with a number of even, rectified, replaceable plates of hard material at a ratio of one per passage of weft thread; two parallel fixed shafts carried by the upper part of the said supports; a number of blocks freely accommodated on one of the said shafts and against which rest a corresponding number of thin flexible sheets bent at an approximately right angle, the bent portions of which fulfill the function of a spring in order to exert the adequate tension on the weft threads by contact with the said rectified even plates of the base in co-operation with a corresponding number of adjustable helical spring an oscillatory lead arranged in front of the said blocks and provided with a series of adjustable screws at a ratio of one per block, adapted to individually adjust the position of the said flexible sheets with respect to said even plates in accordance with the thickness and quality of each weft thread passing therebetween
  • Tensioning and regulating device as claimed in claim 1, wherein the said lever is provided with an adjusting slot through which it is adjustably connected to one end of a rod adapted to impart to the said lever and the oscillatory lead connected therewith the cycle of oscillatory movements required for the regulation of the said flexible sheets according to the tensioning requirements and thickness of the weft threads.
  • Tensioning and regulating device as claimed in claim 1, wherein the inner face of each of the said blocks is provided with a stud bolt carrying one projecting prolonged end of said helical springs, the coils of said springs being mounted on the other fixed shafts carried by the said supports, and each of the other end of said helical springs being secured to the lateral face of a free ring of polygonal outline which by means of as many turns as desired graduates the required tension of said helical springs for each flexible sheet, one of the polygonal faces of the said ring resting on a safety plate which serves for its fastening, thus rendering impossible any accidental modification of the graduation of the whole.
  • Tensioning and regulating device as claimed in claim 1, comprising two plates secured at the lower part of the said supports, said plates being arranged one opposite the other, parallel to the said fixed shafts carried by the supports and provided with circular openings divided into two in longitudinal and diametral direction, a replaceable thread-guiding ring in each of said openings of adequate size for each thickness of weft thread, said weft threads entering through said thread-guiding rings on the driving side of the flexible sheets, passing through the interior of the device between the even rectified plates of the base and the graduated flexible sheets, and leaving,

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US489947A 1964-10-10 1965-09-24 Tensioning and regulating device for the passage of weft threads of different thickness Expired - Lifetime US3340903A (en)

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ES30509064 1964-10-10

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AT (1) AT258228B (de)
GB (1) GB1118319A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3431951A (en) * 1968-01-08 1969-03-11 Marshall John D Loom filling positioner
US3797532A (en) * 1970-09-24 1974-03-19 Fischer Ag Brugg Georg Filling thread clamping device for a shuttleless weaving machine
US4378096A (en) * 1979-11-28 1983-03-29 Burlington Industries, Inc. Tension control for top effect yarn
US4429842A (en) 1981-11-20 1984-02-07 W. Schlafhorst & Co. Central connectible yarn brake mechanism
US4479519A (en) * 1981-07-23 1984-10-30 Saurer Diederichs (Societe Anonyme) Weft brake for shuttleless loom
US4513792A (en) * 1982-04-07 1985-04-30 Sulzer Brothers Limited Weft yarn tensioning device
US4520636A (en) * 1979-11-28 1985-06-04 Burlington Industries, Inc. Woven-like warp knit fabric with tension control for top effect yarn
FR2606429A1 (fr) * 1986-11-06 1988-05-13 Dornier Gmbh Lindauer Frein de fils de trame a intensite de freinage reglable
US5305966A (en) * 1991-07-22 1994-04-26 Sobrevin Societe De Brevets Industriels-Etablissement Device for the differential braking of traveling threads, wires or the like
US6305435B1 (en) * 1999-09-23 2001-10-23 Sulzer Textil Ag Weaving machine with an insertion system for a plurality of generally different weft threads
RU2712709C1 (ru) * 2019-03-27 2020-01-30 Акционерное общество "Информационные спутниковые системы" имени академика М.Ф. Решетнёва" Узел натяжения вант

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH635802A5 (de) * 1979-01-08 1983-04-29 Saurer Ag Adolph Fadenbremse fuer eine textilmaschine sowie verwendung derselben.
CH640016A5 (de) * 1979-10-01 1983-12-15 Saurer Ag Adolph Einrichtung zum zubringen eines schussfadens an einer schuetzenlosen webmaschine.
DE3446567C1 (de) * 1984-12-20 1986-05-07 Lindauer Dornier Gmbh, 8990 Lindau Schussfadenbremse mit stufenweise steuerbarer Bremswirkung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2158828A (en) * 1938-01-18 1939-05-16 Merkel Karl Yarn rewinding set
FR894755A (fr) * 1942-04-11 1945-01-05 Flii Marzoli & Cie Dispositif d'entraînement positif de la trame dans les métiers à tisser
US2749946A (en) * 1954-04-23 1956-06-12 Sulzer Ag Weft thread control in looms for weaving
US2819736A (en) * 1953-02-07 1958-01-14 Sulzer Ag Periodically acting thread brake
US2981497A (en) * 1956-09-17 1961-04-25 Steinhof Apparatefab Karl Thread tensioner
US3129902A (en) * 1961-03-22 1964-04-21 Alsacienne Constr Meca Thread feed control device for textile machinery
FR1383420A (fr) * 1963-04-30 1964-12-24 Perfectionnements aux moyens de tissage par fausse-navette
US3276482A (en) * 1963-04-10 1966-10-04 Jean Gusken Maschinenfabrik Ei Web thread changing device for web-loom

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2158828A (en) * 1938-01-18 1939-05-16 Merkel Karl Yarn rewinding set
FR894755A (fr) * 1942-04-11 1945-01-05 Flii Marzoli & Cie Dispositif d'entraînement positif de la trame dans les métiers à tisser
US2819736A (en) * 1953-02-07 1958-01-14 Sulzer Ag Periodically acting thread brake
US2749946A (en) * 1954-04-23 1956-06-12 Sulzer Ag Weft thread control in looms for weaving
US2981497A (en) * 1956-09-17 1961-04-25 Steinhof Apparatefab Karl Thread tensioner
US3129902A (en) * 1961-03-22 1964-04-21 Alsacienne Constr Meca Thread feed control device for textile machinery
US3276482A (en) * 1963-04-10 1966-10-04 Jean Gusken Maschinenfabrik Ei Web thread changing device for web-loom
FR1383420A (fr) * 1963-04-30 1964-12-24 Perfectionnements aux moyens de tissage par fausse-navette

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3431951A (en) * 1968-01-08 1969-03-11 Marshall John D Loom filling positioner
US3797532A (en) * 1970-09-24 1974-03-19 Fischer Ag Brugg Georg Filling thread clamping device for a shuttleless weaving machine
US4520636A (en) * 1979-11-28 1985-06-04 Burlington Industries, Inc. Woven-like warp knit fabric with tension control for top effect yarn
US4378096A (en) * 1979-11-28 1983-03-29 Burlington Industries, Inc. Tension control for top effect yarn
US4479519A (en) * 1981-07-23 1984-10-30 Saurer Diederichs (Societe Anonyme) Weft brake for shuttleless loom
US4429842A (en) 1981-11-20 1984-02-07 W. Schlafhorst & Co. Central connectible yarn brake mechanism
US4513792A (en) * 1982-04-07 1985-04-30 Sulzer Brothers Limited Weft yarn tensioning device
FR2606429A1 (fr) * 1986-11-06 1988-05-13 Dornier Gmbh Lindauer Frein de fils de trame a intensite de freinage reglable
US4817681A (en) * 1986-11-06 1989-04-04 Lindauer Dornier Gesellschaft Mbh Weft thread brake mechanism for shuttleless looms
BE1001427A3 (fr) * 1986-11-06 1989-10-31 Dornier Gmbh Lindauer Frein de fil de trame a action de freinage commandable pour metiers a tisser sans navette.
US5305966A (en) * 1991-07-22 1994-04-26 Sobrevin Societe De Brevets Industriels-Etablissement Device for the differential braking of traveling threads, wires or the like
US6305435B1 (en) * 1999-09-23 2001-10-23 Sulzer Textil Ag Weaving machine with an insertion system for a plurality of generally different weft threads
RU2712709C1 (ru) * 2019-03-27 2020-01-30 Акционерное общество "Информационные спутниковые системы" имени академика М.Ф. Решетнёва" Узел натяжения вант

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GB1118319A (en) 1968-06-26
AT258228B (de) 1967-11-10

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