US3678968A - Shuttleless loom - Google Patents

Shuttleless loom Download PDF

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Publication number
US3678968A
US3678968A US886298A US3678968DA US3678968A US 3678968 A US3678968 A US 3678968A US 886298 A US886298 A US 886298A US 3678968D A US3678968D A US 3678968DA US 3678968 A US3678968 A US 3678968A
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United States
Prior art keywords
lever
arcuate
shaft
tape
support member
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Expired - Lifetime
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US886298A
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English (en)
Inventor
Yves Juillard
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Alsacienne de Constructions Mecaniques SA
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Alsacienne de Constructions Mecaniques SA
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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

Definitions

  • ABSTRACT In a shuttlelessloom having a reed-carrying frame pivotable about an axis, two opposed needles, one for inserting a weft thread halfway into the shed and the other for picking up the weft thread and drawing it through the second half of the shed; each needle is connected to one end of a flexible ribbon slidable in an arcuate guide which is integral with and substantially in the plane of the reed-carrying frame, and the center of the guide is adjacent the pivot axis of the frame.
  • the other end of the ribbon is connected to a control arm on a, shaft which remains perpendicular to the plane of the guide and passes through the center of the latter, and the shaft is oscillated in synchronism with the frame through a rotary shaft of the loom.
  • SHUTTLELESS LOOM BACKGROUND OF THE INVENTION This invention relates to shuttleless looms of the type comprising two opposed needles, of which one periodically inserts a weft thread into the shed as far as the halfway position, i.e. into the first half of said shed, while the other needle picks up the thread from the first needle and draws it into the second half of the shed.
  • the invention relates especially but not exclusively to looms of this type as described in French Pat. No. 1,290,867, i.e. in which the inner end or head of each needle rests freely on the lower sheet of weft threads, close to the reed, while its other end is connected to drive means undergoing an oscillating movement in the axial direction of the needle, so that, under the effect of the weight and inertia of each needle, its head is simultaneously applied against both faces of the dihedral angle formed by the lower sheet of weft threads and by the front face of the reed carried by a frame, so that both needles meet with precision for picking up and passing on the weft thread.
  • drive means for each needle comprising a system of jointed levers.
  • a system of jointed levers Although such a system is satisfactory for current loom widths, it has a disadvantage in that it is no longer feasible for a wider loom, as the travel imparted to the needles has to be so long that the amplitudes of the pivoting movements of the needle propelling levers lead to oblique positioning of some levers relative to others which, towards the end of the movements, give rise to lateral components which are incompatible with the efficient functioning of the mechanism.
  • An object of the present invention is to provide a shuttleless loom of the abovementioned type, without the aforesaid disadvantage.
  • the drive means for each needle comprises a flexible ribbon sliding in a lateral guide in an arc integral with the reed frame and located substantially in the plane of the latter, the center of said guide [being in the vicinity of the lower pivotal axis of said frame, one end of said ribbon being connected to said needle, and its other end to the end of an arm pivotally mounted on a shaft constantly perpendicular to the plane of the arcuate guide and passing through the center of the latter, said arm-supporting shaft being driven, in operation, with an angular to-and-fro movement synchronous with the movements of said frame, through a transmission which permanently connects it to a rotary shaft of the loom
  • Such a device allows high linear speed of the welt-inserting needles by a very light system of acceptable size.
  • the winding and unwinding of the ribbon takes place in an arc of approximately a quarter of the circumference, and its extent substantially equals the total height of the loom chassis, there being, therefore, much less heating of the ribbon than in looms previously proposed, and so allowing much higher weaving speeds.
  • Each arcuate guide may comprise an inner wall fixed on the ends of arms radiating from and forming a unit with a supportpiece integral with said frame, and an outer wall fixed to the inner one by U-section yokes lying on their sides, whose two branches are respectively fixed to the outer faces of the said walls, the connection between the ribbon and said arm which moves it being to the side of said guide opposed to that on which are located the closed ends of the yokes.
  • the shuttleless large-width loom as shown in FIG. 1 has a chassis l with two end-plates 2, 3, a frame or lay 4 with a reed 5 whose two connecting rods 6, 7 are supported by a lower transverse shaft 8 which is journalled in the end-plates 2, 3 of the chassis 1, and a main shaft or crankshaft 12 which also is of the 3 5 journalled in the end-plates 2, 3, and which is connected to the connecting rods 6, 7 by links l3, 14, respectively.
  • a warp roll or beam is shown at 17, and 18 shows, in the form of a weight suspended from the end of a cord passing over a pulley l9 integral with the rollers 17, a roller-braking device which may be of any suitable type.
  • Patent for further details of the structure of these units and their control, reference may be made to that Patent.
  • the crankshaft 12 is driven, for example, by an electric motor 31 through a belt 32 passing over a pulley 33 of the motor and a pulley-wheel 34 integral with the crankshaft 12.
  • the positioning of the weft threads in the shed is effected by two needles, i.e. an insertion needle 36 and a drawing needle 37 (see also FIG. 3) fixed, for example, by rivets 39 respectively on the upper ends of two ribbons 38, 38A mounted in the same manner on each side of the loom.
  • the assembly of one only of these will be described, i.e. that of the ribbon 38.
  • the ribbon 38 slides between two concentric guides 41, 42 (FIGS. 1 and 2), each comprising an arcuate part extended by a rectilinear part ending level with the top of the frame or lay 4.
  • the inner guide 41 is supported in the plane of the frame 4 by arms 46, 47, 48, 49 mounted in and radiating from a support block 52 integral with the frame 4 and pivoting with it on an extension 8A of the transverse lower shaft 8, which is journalled in an auxiliary bearing 54.
  • the outer guide 42 of which only an upper part has been shown, is kept concentric with the inner guide 41 by yokes 53 whose closed ends are turned for example towards the rear of the loom, so that drive of the ribbon 38 can be effected through the front face of the space between the guides 41, 42.
  • the lower end of the ribbon 38 is integral withthe end of a pivot arm 56 fixed on a horizontal shaft 57 which can pivot in the support block 52 about an axis perpendicular to the plane of the block 52.
  • the arm 56 is located just in front of the two guides 41 and 42, and it is connected to the ribbon 38 by its bent endas shown at 59.
  • the shaft 57 is driven with an alternating pivotal movement by the crankshaft 12 through a transmission comprising a cam 61 integral with the adjacent end of the crankshaft l2, aroller 62 co-operating with the cam 61 and carried by a primary lever 63 which can oscillate on the end-plate 2 of the chassis 1 on a horizontal shaft 65, a connecting rod 66, of which one end is connected to the end of the lever 63, another arm 67 pivoting on the block 52 on a shaft 68 parallel to the shaft 57, the end of the arm 67 being connected to the other end of connecting rod 66, a rod 71 (see also FIG.
  • the upper end of rod 66 is fixed to the end of the lever 63 in a slideway 77 in such a way that, in accordance with the position in the slideway in which the said end of the rod 66 is fixed, the length of travel of ribbon 38 can be precisely regulated, for a given cam 61.
  • a cam 61A fixed on the other end of the crankshaft 12, and for controlling the oscillating movement of the other ribbon 38A is offset by 180 degrees relative to the cam 61, so that the roller 62 co-operating with the cam 61 is on the other side of the axis of the crankshaft relative to the roller which cooperates with the cam 61A.
  • This arrangement ensures a positive connection of the two arms 63, carried by the same shaft 65, whose two activating rollers are thus on each side of cams 61 and 61A which control them respectively.
  • springs for holding the roller-carrying levers against the cams are unnecessary.
  • the system for driving the needles by means of ribbons connected to an oscillating shaft may be applied to looms whose needles are not flying as shown in the cited French Patent, but, on the contrary, are kept in guides across the shed.
  • a shuttleless loom having means for shedding warp threads, a ,lay reciprocable longitudinally of the shed formed by said warp threads, weft inserting means including a pair of tape members reciprocable toward and away from each other transversely of the shed, and two mechanisms one at each side of said lay for operating said tape members, each mechanism comprising a support member mounted for reciprocating motion with said lay, a tape restraining structure mounted on said support member and having two mutually facing concentric surfaces defining an arcuate path of substantially 90, a lever having one end connected to the end of the related tape member remote from said shed and having its other end connected to said support member for reciprocating motion about a pivot axis located at the center of said path, and means actuated in timed relationship to the reciprocatory movement of said lay for reciprocating said lever between a position in which said tape member end lies at one end of said path and a position in which said tape member end lies at the other end of said path, a frame, a crank shaft journalled in the frame, said lay being
  • said tape restraining structure comprises two parallel arcuate members the inner faces of which constitute said two concentric surfaces, one of said arcuate members being mounted on said support member by means of a plurality of connecting arms converging from the outer face of said one arcuate member to said support member, and the other arcuate member being mounted on said one arcuate member in radially spaced relation by means of a plurality of U-shaped connecting members having one leg secured to the outer face of said one arcuate member and the other leg secured to the outer face of the other arcuate member.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US886298A 1968-12-24 1969-12-18 Shuttleless loom Expired - Lifetime US3678968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR180332 1968-12-24

Publications (1)

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US3678968A true US3678968A (en) 1972-07-25

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US886298A Expired - Lifetime US3678968A (en) 1968-12-24 1969-12-18 Shuttleless loom

Country Status (11)

Country Link
US (1) US3678968A (it)
BE (1) BE743630A (it)
BR (1) BR6915566D0 (it)
CH (1) CH501080A (it)
CS (1) CS161867B2 (it)
DE (2) DE6950539U (it)
ES (1) ES374683A1 (it)
FR (1) FR1598697A (it)
GB (1) GB1270429A (it)
NL (1) NL6918820A (it)
SU (1) SU382302A3 (it)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779288A (en) * 1972-06-14 1973-12-18 Rockwell International Corp Weft carrier guide
US4047491A (en) * 1976-06-25 1977-09-13 Abram N. Spanel Multi-color tufting machine
US4059021A (en) * 1976-06-25 1977-11-22 Abram N. Spanel Apparatus for converting oscillatory motion to reciprocating motion
US4062308A (en) * 1976-06-25 1977-12-13 Abram N. Spanel Two-pile height yarn feed for conventional tufting machine
US4064816A (en) * 1976-06-25 1977-12-27 Abram N. Spanel Double select needle tufting machine
US4070918A (en) * 1974-06-06 1978-01-31 Ingeniera Aplicada, S.A. (Inapsa) Gripper holder bands driving mechanism for shuttleless looms
US5092374A (en) * 1989-06-09 1992-03-03 S.A. Saurer Diederichs Guide and support devices for weft inserters in shuttleless looms
US20130118633A1 (en) * 2010-06-09 2013-05-16 Walter Studer Loom for producing woven goods or material with an incorporated cover thread
CN105133150A (zh) * 2015-09-24 2015-12-09 湖州现代纺织机械有限公司 一种分离式双经轴剑杆织机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL155604B (nl) * 1975-10-06 1978-01-16 Picanol Nv Aandrijfinrichting voor naalden op een naaldgetouw.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2106727A (en) * 1933-08-23 1938-02-01 Collins & Aikman Corp Loom
FR976105A (fr) * 1942-04-10 1951-03-14 Perfectionnements aux métiers à tisser sans navettes
FR979741A (fr) * 1949-01-28 1951-05-02 Perfectionnements aux métiers à tisser à insertion de la trame sous forme de doubles duites
US2657714A (en) * 1948-07-16 1953-11-03 Ballber Mariano Needle loom
US3159186A (en) * 1961-02-14 1964-12-01 Alsacienne Constr Meca Weaving frame

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2106727A (en) * 1933-08-23 1938-02-01 Collins & Aikman Corp Loom
FR976105A (fr) * 1942-04-10 1951-03-14 Perfectionnements aux métiers à tisser sans navettes
US2657714A (en) * 1948-07-16 1953-11-03 Ballber Mariano Needle loom
FR979741A (fr) * 1949-01-28 1951-05-02 Perfectionnements aux métiers à tisser à insertion de la trame sous forme de doubles duites
US3159186A (en) * 1961-02-14 1964-12-01 Alsacienne Constr Meca Weaving frame

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779288A (en) * 1972-06-14 1973-12-18 Rockwell International Corp Weft carrier guide
US4070918A (en) * 1974-06-06 1978-01-31 Ingeniera Aplicada, S.A. (Inapsa) Gripper holder bands driving mechanism for shuttleless looms
US4047491A (en) * 1976-06-25 1977-09-13 Abram N. Spanel Multi-color tufting machine
US4059021A (en) * 1976-06-25 1977-11-22 Abram N. Spanel Apparatus for converting oscillatory motion to reciprocating motion
US4062308A (en) * 1976-06-25 1977-12-13 Abram N. Spanel Two-pile height yarn feed for conventional tufting machine
US4064816A (en) * 1976-06-25 1977-12-27 Abram N. Spanel Double select needle tufting machine
US5092374A (en) * 1989-06-09 1992-03-03 S.A. Saurer Diederichs Guide and support devices for weft inserters in shuttleless looms
US20130118633A1 (en) * 2010-06-09 2013-05-16 Walter Studer Loom for producing woven goods or material with an incorporated cover thread
CN105133150A (zh) * 2015-09-24 2015-12-09 湖州现代纺织机械有限公司 一种分离式双经轴剑杆织机

Also Published As

Publication number Publication date
BE743630A (it) 1970-06-23
CH501080A (fr) 1970-12-31
ES374683A1 (es) 1972-01-01
GB1270429A (en) 1972-04-12
NL6918820A (it) 1970-06-26
DE1965832A1 (de) 1970-09-03
DE6950539U (de) 1971-11-11
BR6915566D0 (pt) 1973-01-18
DE1965832C3 (de) 1975-12-18
SU382302A3 (it) 1973-05-22
FR1598697A (it) 1970-07-06
DE1965832B2 (de) 1975-04-17
CS161867B2 (it) 1975-06-10

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