US3299911A - Weaving machine with uninterrupted weft supply - Google Patents

Weaving machine with uninterrupted weft supply Download PDF

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Publication number
US3299911A
US3299911A US425779A US42577965A US3299911A US 3299911 A US3299911 A US 3299911A US 425779 A US425779 A US 425779A US 42577965 A US42577965 A US 42577965A US 3299911 A US3299911 A US 3299911A
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Prior art keywords
guiding
needle
band
weaving machine
guides
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US425779A
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English (en)
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Dewas Raymond
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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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms

Definitions

  • the invention relates to weaving machines with uninterrupted weft supply from large bobbins situated outside the shed.
  • the needles used, in particular, on the wide looms, and consisting in most cases of two elements: a flexible band and a rigid part, itself comprising a needle body and a head, the front part of the said band being fixed underneath the lower face, or sole, of the said needle body.
  • a driving wheel engages perforations in the band and causes the needle to perform a reciprocating movement; outside the shed, the edges of the b ands are engaged in a rectilinear slide bar which is prolonged in the form of a bow-shaped part which guides the band towards the bottom of the machine, while inside the shed the said edges are engaged in the indentations of guides taking the form of figures, which perform the guiding operation by means of their lower face, or base, their lateral face and their upper face.
  • the head which is mounted at the front extremity of the needle body, extends beyond the end of the band, and is thus in advance of the guiding zone, and overhanging. It follows that various forces, including the inertia of the head when the direction of movement of the needle and the slay is reversed, are mainly localized on the front part of the hand, which therefore generally becomes unusable owing to the more rapid wear suffered by the said part.
  • the purpose of the invention is to remedy these drawbacks, for which purpose the band is aflixed, at the most, underneath the rear portion of the body of the needle, while the front portion of the sole of the said body comprises a guiding element, of which the cross-section is exactly the same as that of the band, and a reinforcing element forming a longitudinal rib or projection underneath the lower face of the guiding element.
  • the elements in question preferably consist of a detachable wear piece.
  • the lower longitudinal rib lowers the warp threads of the lower web below the level of the base of the guides, and this system, by contrast to the known type of construction, eliminates the risk of the said warp threads becoming jammed between the guiding surfaces and the lower face of the band while the latter is advancing, so that, compared with apparatus designed in the past, the surfaces guiding the sail lower face of the band can be increased in the transversal and also in the longitudinal direction, resulting in a reduction in the vertical pressure per unit area of the weaving part and of the edges of the band against the guiding surfaces consisting of the bases of the guides, and consequently in a corresponding reduction in the wear suffered by the parts as a result of friction.
  • the system based on the invention also makes it possible to provide two supplementary guiding surfaces along the lateral faces of the longitudinal rib. This is yet a further characteristic of the invention, which results in a reduction of the horizontal pressure per unit area between the friction surfaces and consequently in a reduction of the wear suffered in the said direction.
  • the lower face of the front portion of the body of the needle is inclined downwards to the rear, and the front end of the aforementioned longitudinal rib is inclined in the same direction, while the front end of the guiding element, of exactly the same cross-section as that of the band, is inclined, in top view, towards the rear, towards each side from the centre, in order to reach the sides of said band section.
  • the warp threads of the lower web, when the said element enters the shed already occupy a sufficiently low position to ensure that they are not subjected to fatigue, owing to the fact that they only have to bear, at the most, a slight contact from the said element.
  • the ribbed Wear piece added to the body of the needle is obviously more rigid than the band portion which it replaces and it contributes to the rigidity of the said needle body, which results in a further reduction in the wear on the guiding surfaces, as a result of the reduction in the bending stresses of the members which slide in the guides.
  • FIG. 1 shows, in elevational view, one end of a slay of a weaving machine with uninterrupted weft supply, the rectilinear slide and the guide how for the band, as well as the mechanism adapted to drive the needle.
  • FIG. 2 shows, on a larger scale, and as an elevation, with portions cut away, the rectilinear slideway with the needle at the outer end of its travel.
  • FIG. 3 is a plan view from below, corresponding to FIG. 2, but only showing the needle.
  • FIG. 4 is a cross section along the line IVIV of FIG. 2.
  • FIG. 5 is an elevation of the body of the needle, engaged in the first guides.
  • FIG. 6 is a section along the line VIVI of FIG. 1.
  • FIG. 7 is a section along the line VII-VII of FIG. 5.
  • FIG. 8 is a section along the line VIII-VIII of FIG. 5.
  • FIG. 9 is an elevation, with portions cut away, of the guide alone to be seen in FIG. 7.
  • FIG. 10 is a plan view corresponding to FIG. 9.
  • FIG. 11 is a view similar to FIG. 8 and shows a first alternative form of guide.
  • FIG. 12 is a partial elevation of this first alternative form of guide, shown alone.
  • FIG. 13 is a plan view corresponding to FIG. 12.
  • FIGS. 14 and 15 show, as an elevation and as a plan view, respectively, the configuration of one of the guides provided by prior art.
  • FIG. 1 The weaving machine with uninterrupted weft supply is shown partially in FIG. 1, where can be seen one end of the slay 1, a weft thread feed needle marked 2 as a whole and consisting of a flexible band 3 (FIGS. 2, 5 and 7), a needle body 4 and a needle head 5, guiding devices for the needle, which are integral with the slay and which comprise, on the one hand, a rectilinear slideway 6, and one the other hand, guides such as 7, situated inside and at the edges of the zone where the shed is formed, a bow-.
  • a weft thread feed needle marked 2 as a whole and consisting of a flexible band 3 (FIGS. 2, 5 and 7)
  • a needle body 4 and a needle head 5
  • guiding devices for the needle which are integral with the slay and which comprise, on the one hand, a rectilinear slideway 6, and one the other hand, guides such as 7, situated inside and at the edges of the zone where the shed is formed, a bow-.
  • a cogwheel 9 mounted on a transversal shaft set in alternating motion in order to cause the needle to perform a reciprocating movement, under the action of a mechanism comprising a toothed pinion 11 integral with the said shaft, a toothed sector 12 engaging with the pinion 11, and a cam 13, which acts on an extension of the arm of the sector 12 and which is integral with a horizontal shaft 14 set in rotation by any suitable means, the swords such as 1a of the slay 1 being freely linked to the said shaft.
  • the band 3 consists of a number of superimposed strips (two in number, 3a and 3b, in the present example, FIG. 2); it has central perforations 15 (see also FIGS. 3 and 7) adapted to be engaged by the teeth 16 of the wheel 9 (FIG. 2).
  • the band 3 is fixed underneath the rear part of the sole of the needle body 4, by any suitable means, e.g. by two rows of bolts 17 and 18, arranged on either side of the line of perforations 15 in the said band.
  • a wear piece 19 of special structure is aflixed, by means, for example, of a row of bolts 20 (FIGS. 2 and 3).
  • the wear piece 19 comprises a guiding element 21 (see also FIG. 4), having a cross-section exactly the same as that of the band and therefore forming an extension of this latter, and also a reinforcing element 22, forming a longitudinal projecting rib underneath the lower face of the said guiding element.
  • the end of the band 3, afiixed to the needle body, is cut away to a point, as shown at 23 (FIGS. 2 and 3) is accommodated in a recess 24 of triangular shape provided in the rear end of the wear piece 19; the securing means is completed by a bolt 25 situated in the point of the band.
  • the lower face of the front part of the needle body is inclined downwards to the rear, in order to form a slope 27, so that it can lower the warp threads of the lower web when the needle penetrates the shed.
  • the front end of the wear piece 19 is likewise inclined downwards to the rear, to form a slope 28, substantially constituting an extension of the slope 27.
  • the front end of the guiding element 21 of the wear piece 19 is inclined, in plan top view, towards the rear, to either side from the centre, as indicated at 29 and 30 in FIG. 3.
  • the said front part of the guiding element reaches its maximum width, i.e. a width equal to that of the band, substantially in the same transverse plane as the rear extremity of the slope 28, as indicated at A and B in FIG. 3.
  • the upper face and the lower face of the inclined parts 29 and 30 of the front end of the guiding element of the wear piece 19 are bevelled; in other words, the upper face is inclined towards the front and downwards, as indicated at 31 in FIG. 2, and the lower face is inclined upwards the front, as indicated at 32 and 33 in FIGS. 2 and 3.
  • the slideway 6 comprises a profiled part 34 which rests on a support 35, secured the slay 1 by bolts 36 (FIG. 1).
  • the said profiled part comprises two lateral guiding surfaces 37 and 38 (FIG. 4), two lower horizontal guiding surfaces 39 and 40, and two supplementary vertical guiding surfaces 41 and 42.
  • the slideway also comprises two upper horizontal guiding surfaces 43 and 44, formed by the inner edges of two plates 45 4 and 46, affixed to the top part of the profiled part 34 by means of bolts 47.
  • each guide, such as 7, comprises a body 51, which, under the action of our oblique screw 52 (see also FIGS. 5 and 6), is applied, by two faces 53 and 54 against the upper face of a rule 55, and by a vertical face 56, against a face of the same rule, this latter being affixed, by means of screws 57 and shims 58 (see also FIGS. 5 and 6) against the web of an H-section profiled part 59 forming the slay 1.
  • the lower part of the reed 60 is also shown, being afiixed in a part 61 which is integral with the profiled part 59.
  • each guide 7 has a notch forming a lower horizontal guiding surface, or base 62 (FIGS. 9 and 10), a lateral vertical surface 63 and an upper horizontal surface 64.
  • the base 62 extends towards the inside, as far as the position of the corresponding lateral face of the longitudinal rib 22 of the wear piece (see FIG. 8), but, in order to ensure that the warp threads of the lower web easily slide on either side of the base when the slope 28 of the front extremity of the wear piece 19 enters the shed, that part of this horizontal guiding surface which is closest to the axis of the system has the shape of an isosceles trapezium, of which the minor base is nearer the said axis and parallel thereto, this shape being obtained by two chamfers 65 and 66 (FIGS. 9 and 10).
  • the finger 49 of the guide also has a supplementary vertical guiding surface 67, against which the corresponding lateral face of the rib 22 is adapted to slide.
  • each guide 7 also has four guiding surfaces, symmetrical to the faces of the guiding surfaces of the finger 49, in relation to the median longitudinal plane of the guide; the said surfaces have been marked with the same reference numbers as those of the finger 49, but with the addition of the letter a.
  • the guiding element 21 (FIG. 4) of the wear piece 19, as well as the front part of the band 3 are guided, by the three faces of each of their edges, by the corresponding guiding surfaces 37, 38, 39, 40 and 42, 44.
  • the lateral faces of the longitudinal rib 22 of the wear piece are, moreover, guided by the corresponding vertical surfaces 41 and 42 of the said slide.
  • the cogwheel 9 causes the needle to perform its forward movement, so that the head 5, mounted on the needle body in overhanging relation thereto, penetrates the shed 68 (FIG. 8) in the vicinity of the face 73 of the fabric.
  • the inclined upper end 69 (FIG. 1) of the head raises the warp threads of the upper web 70, while the lower inclined end 71 lowers the warp threads of the lower web 72.
  • the needle moves away from the fell 73 of the fabric, continuing its travel in an increased space.
  • the wear piece easily engages the notches of the guides 7, owing to the inclination a (FIG. 3) of the front face of the guiding element 21 of the said piece and also owing to the chamfers, such as 31, 32, and 33, provided on the upper and lower faces of this front end of the wear piece.
  • the needle body had no lower longitudinal rib, so that at the beginning of the travel of the needle in the shed the lower web of the warp threads 72 was not lowered to below the level of the base of the guides, and consequently, in order to avoid the jamming and rolling of the said threads between the lower face of the band fixed underneath the sole of the needle body and the surfaces 62b and 62c of the guides 7b it was necessary to limit the transversal extent of these guiding surfaces and to make them slim in shape, as may be seen from the drawing, which reduced the surface still further.
  • FIGS. 11, 12 and 13 a modification of the guide 74, is shown, in addition to the guiding surfaces of the guides 7 described above, and in order to reduce the pressure per unit area still further, there is a small supplementary horizontal guiding surface 75, 75a, on which (FIG. 11) the two edges of the lower face of the longitudinal rib 22 of the wear piece, respectively, perform a sliding movement.
  • the wear piece can be either longer or shorter and can extend under practically the entire length of the body of the needle, the position of the cog-wheel 9 and that of the slideway 6 then being appropriately modified.
  • the wear piece could be made integral, at the manufacturing stage, with the needle body.
  • equivalents to the perforations 15 could be provided in the wear piece.
  • a weaving machine with uninterrupted weft supply having at least one needle consisting of a flexible band of rectangular cross-section to one end of which is secured a needle body having a head; a slay; and guiding means carried by said slay for guiding said needle; said guiding means comprising a plurality of guides, a slideway and a bow-shaped part, said weaving machine being characterized in that said needle has a sole formed with a guiding element having the same cross-section as that of said band and a reinforcing element forming a longitudinal rib underneath the lower face of said guiding element.
  • said guiding element comprises a front end which is inclined towards the rear to each side from the centre outwards.
  • a weaving machine wherein the upper face and the lower face of said inclined parts of the front end of said guiding element are bevelled, the upper face being inclined downwardly and the lower face being inclined upwardly.
  • each of said guides has a horizontal supporting end guiding surface for the lower face of said band and said guiding element, said surface extending in transverse direction from each vertical plane containing the edges of said band inwardly to the path of travel of the corresponding lateral face of said reinforcing element.
  • each guide further has a supplementary lateral guiding surface for guiding the corresponding lateral face of said reinforcing element.
  • each guide has a second supplementary guiding surface for the lower face of said rib.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Knitting Machines (AREA)
US425779A 1964-01-17 1965-01-15 Weaving machine with uninterrupted weft supply Expired - Lifetime US3299911A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR960733A FR1397230A (fr) 1964-01-17 1964-01-17 Perfectionnements aux machines à tisser à alimentation continue en trame

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Publication Number Publication Date
US3299911A true US3299911A (en) 1967-01-24

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US425779A Expired - Lifetime US3299911A (en) 1964-01-17 1965-01-15 Weaving machine with uninterrupted weft supply

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US (1) US3299911A (fr)
BE (1) BE658330A (fr)
DE (1) DE1279565B (fr)
ES (1) ES308591A1 (fr)
FR (1) FR1397230A (fr)
GB (1) GB1076652A (fr)
NL (1) NL6500498A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344812A (en) * 1965-04-06 1967-10-03 Duran Magin Desveus Looms with stationary weft supply
US4076053A (en) * 1975-07-10 1978-02-28 Albatex A.G. Means guiding the straps of the weft carrying grippers inside the shed
US4638839A (en) * 1983-10-10 1987-01-27 Vamatex S.P.A. Guide for the gripper carrying straps inside the shed of weaving looms
EP0406926A1 (fr) * 1989-07-06 1991-01-09 Picanol N.V. Métier à tisser à griffes avec guidage des rubans
US5135033A (en) * 1990-03-13 1992-08-04 Sulzer Brothers Limited Rapier loom having picking tapes and spacers
EP0552495A1 (fr) * 1992-01-20 1993-07-28 Picanol N.V. Métier à griffes avec des moyens de guidage pour la formation d'un guidage pour un ruban à griffes
EP0623694B2 (fr) † 1993-05-05 2001-05-02 NUOVA VAMATEX S.p.A. Ruban à griffes pour métiers à tisser
US6230759B1 (en) * 1997-04-02 2001-05-15 Picanol N.V. Gripper weaving machine with ribbed guide porton connected to rapier
US6276403B1 (en) * 1997-02-24 2001-08-21 Picanol N.V. Gripper weaving machine with guide elements
CN105113107A (zh) * 2015-09-14 2015-12-02 广西华虹绸缎有限责任公司 剑杆织机的浮动式导钩机构
WO2018028899A1 (fr) 2016-08-11 2018-02-15 Picanol Bande de pinçage et unité de pinçage pour métier à tisser à projectiles

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH637705A5 (en) * 1979-06-01 1983-08-15 Rueti Ag Maschf Gripper weaving machine having a flexible insertion band
IT1184559B (it) * 1985-06-04 1987-10-28 Vamatex Spa Mezzi per guidare le pinze porta-trama ed i nastri che le comandano all'interno del passo di telai di tessitura a pinze
DE3527202C1 (de) * 1985-07-30 1986-10-09 Lindauer Dornier Gmbh, 8990 Lindau Greiferstange fuer schuetzenlose Webmaschinen
IT1198246B (it) * 1986-12-23 1988-12-21 Vamatex Spa Mezzi per guidare il moto di una coppia di pinze portatrama all'interno del passo di telai di tessitura
IT1227335B (it) * 1988-09-08 1991-04-08 Vamatex Spa Mezzi per guidare il moto di pinze di alimentazione della trama all'interno del passo di telai di tessitura senza navette
IT1230810B (it) * 1989-08-09 1991-10-29 Vamatex Spa Nastro portapinza a spessore variabile per telai di tessitura a pinze.
EP1123430B1 (fr) * 1998-08-25 2007-06-13 Picanol N.V. Metier a tisser a pinces comportant au moins une bande a pinces et des moyens de guidage
BE1013013A3 (nl) * 1998-10-29 2001-07-03 Picanol Nv Grijperband voor een grijperweefmachine.
IT1303652B1 (it) * 1998-12-23 2001-02-21 Somet Soc Mec Tessile Gancino per piste di guida dei nastri delle pinze in un telaio ditessitura a pinze
BE1022753B1 (nl) * 2015-02-02 2016-08-30 Picanol Lans, grijperweefmachine en werkwijze voor het vervaardigen van een lans

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE210336C (fr) *
US2125894A (en) * 1935-08-10 1938-08-09 Dewas Raymond Needle weaving loom
US2151085A (en) * 1936-11-21 1939-03-21 Dewas Raymond Needle weaving loom
US3077905A (en) * 1961-04-17 1963-02-19 Draper Corp Filling carrier for shuttleless looms
US3085598A (en) * 1961-05-22 1963-04-16 Draper Corp Filling carriers for shuttleless looms
US3116761A (en) * 1961-10-27 1964-01-07 Draper Corp Filling carrier for shuttleless looms
US3144051A (en) * 1961-12-01 1964-08-11 Dewas Raymond Needle for weaving machines of the continuous weft-feed type
US3232321A (en) * 1962-10-03 1966-02-01 Dewas Raymond Weft needle drive means

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE869477C (de) * 1936-11-21 1953-03-05 Raymond Dewas Schussfadeneintragvorrichtung fuer Nadelwebstuehle
US2604123A (en) * 1949-01-19 1952-07-22 Draper Corp Loom and method of weaving

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE210336C (fr) *
US2125894A (en) * 1935-08-10 1938-08-09 Dewas Raymond Needle weaving loom
US2151085A (en) * 1936-11-21 1939-03-21 Dewas Raymond Needle weaving loom
US3077905A (en) * 1961-04-17 1963-02-19 Draper Corp Filling carrier for shuttleless looms
US3085598A (en) * 1961-05-22 1963-04-16 Draper Corp Filling carriers for shuttleless looms
US3116761A (en) * 1961-10-27 1964-01-07 Draper Corp Filling carrier for shuttleless looms
US3144051A (en) * 1961-12-01 1964-08-11 Dewas Raymond Needle for weaving machines of the continuous weft-feed type
US3232321A (en) * 1962-10-03 1966-02-01 Dewas Raymond Weft needle drive means

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344812A (en) * 1965-04-06 1967-10-03 Duran Magin Desveus Looms with stationary weft supply
US4076053A (en) * 1975-07-10 1978-02-28 Albatex A.G. Means guiding the straps of the weft carrying grippers inside the shed
US4638839A (en) * 1983-10-10 1987-01-27 Vamatex S.P.A. Guide for the gripper carrying straps inside the shed of weaving looms
US5183084A (en) * 1989-07-06 1993-02-02 Picanol N.V., Naamloze Vennootschap Rapier guide with two series of guide elements
EP0406926A1 (fr) * 1989-07-06 1991-01-09 Picanol N.V. Métier à tisser à griffes avec guidage des rubans
BE1004305A3 (nl) * 1989-07-06 1992-10-27 Picanol Nv Grijperweefmachine met lansgeleiding.
USRE35400E (en) * 1990-03-13 1996-12-17 Sulzer Brothers Limited Rapier loom having picking tapes and spacers
US5135033A (en) * 1990-03-13 1992-08-04 Sulzer Brothers Limited Rapier loom having picking tapes and spacers
EP0552495A1 (fr) * 1992-01-20 1993-07-28 Picanol N.V. Métier à griffes avec des moyens de guidage pour la formation d'un guidage pour un ruban à griffes
EP0623694B2 (fr) † 1993-05-05 2001-05-02 NUOVA VAMATEX S.p.A. Ruban à griffes pour métiers à tisser
US6276403B1 (en) * 1997-02-24 2001-08-21 Picanol N.V. Gripper weaving machine with guide elements
US6230759B1 (en) * 1997-04-02 2001-05-15 Picanol N.V. Gripper weaving machine with ribbed guide porton connected to rapier
CN105113107A (zh) * 2015-09-14 2015-12-02 广西华虹绸缎有限责任公司 剑杆织机的浮动式导钩机构
WO2018028899A1 (fr) 2016-08-11 2018-02-15 Picanol Bande de pinçage et unité de pinçage pour métier à tisser à projectiles
CN109563658A (zh) * 2016-08-11 2019-04-02 必佳乐公司 用于片梭织机的片梭带和片梭单元
US20190226127A1 (en) * 2016-08-11 2019-07-25 Picanol Gripper band and gripper unit for a gripper weaving machine

Also Published As

Publication number Publication date
BE658330A (fr) 1900-01-01
GB1076652A (en) 1967-07-19
DE1279565B (de) 1968-10-03
FR1397230A (fr) 1965-04-30
ES308591A1 (es) 1965-05-01
NL6500498A (fr) 1965-07-19

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