EP0461524A1 - Weft yarn presenting device for gripper looms - Google Patents
Weft yarn presenting device for gripper looms Download PDFInfo
- Publication number
- EP0461524A1 EP0461524A1 EP91109116A EP91109116A EP0461524A1 EP 0461524 A1 EP0461524 A1 EP 0461524A1 EP 91109116 A EP91109116 A EP 91109116A EP 91109116 A EP91109116 A EP 91109116A EP 0461524 A1 EP0461524 A1 EP 0461524A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- presenting
- weft
- rods
- gripper
- yarn
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
- D03D47/34—Handling the weft between bulk storage and weft-inserting means
- D03D47/38—Weft pattern mechanisms
Definitions
- the present invention concerns a weft yarn presenting device for gripper looms.
- one or more weft yarns are inserted by a pair of grippers with alternate motion, cooperating at the centre of the shed, into the sequence of the warp yarns forming said shed.
- Such devices substantially comprise one or more rods having an eyelet into which passes a respective weft yarn to be presented. When one of said eyelets moves, it shifts the respective weft yarn from a rest position far from the gripper trajectory, to another position (called presenting position) wherein the weft yarn can be gripped by the carrying gripper and conveyed towards and into the warp shed.
- weft control ends when the gripper moves out of the warp shed and the selection step requires a certain time for the yarn to be hooked, which depends on the force of the electromagnet and/or on the masses of the mechanical hooking elements having to be shifted.
- said time corresponds to wider rotation angles of the loom for the selection step, hence to the detriment of the angles utilizable for the presenting step, the reduction of which leads to an increase in the mechanical stresses, in the wears and in the vibrations of the presenting device.
- one is forced to anticipate the start of the selection step before the outlet of the gripper from the warp shed - which outlet determines the final time within which weft control can take place - rather than reducing the times for the presenting step.
- the mechanical presenting devices require furthermore a motion transmission obtained with a mechanical drive by means of belts, chains or gears, which cause problems of alignment on assembly, require maintenance and limit the choice of the most suitable positioning on the loom for a proper weaving operation.
- Said device is of the type comprising a plurality of presenting rods having a yarn guiding eyelet, which converge towards the zone in which the weft yarn has to be gripped by the loom carrying gripper and which are each controlled by a flexible cable sliding into a sheath, and is characterized in that each of the flexible cables controlling said rods is operated by a linear electric motor.
- the linear electric motor can operate the corresponding flexible cable either directly, by acting along the main axis of said cable and/or of the rod controlled by the same in order to produce short alternate rectilinear movements thereof, or through a rotary lever caused to perform short angular back and forth movements.
- the rods of the device are moreover guided into a stiff guide, in respect of which they are preferably prevented from rotating.
- each linear electric motor of the device there are associated electronic control means, preferably comprising a microprocessor, apt to constantly detect the position of the presenting rod operated by said motor and to govern the motor according to said position, to the working of the loom and to the physical/textile features of the yarn being woven.
- electronic control means preferably comprising a microprocessor, apt to constantly detect the position of the presenting rod operated by said motor and to govern the motor according to said position, to the working of the loom and to the physical/textile features of the yarn being woven.
- each of the presenting rods can act so as to regulate the tension of the weft yarn moved by the same.
- the device according to the invention comprises - in known manner - a plurality of presenting rods 1, ending with an eyelet 2 for the weft yarn f and each controlled by a flexible cable 3 sliding into a sheath 4.
- Figure 1 shows, by way of example, a device with eight rods 1, of which only one can be seen in figure 2. Also in known manner the rods 1, which are slidably guided into stiff guides 5 wherein their rotation is prevented, converge into the zone P where the weft yarn has to be gripped by the loom carrying gripper to be drawn into the shed.
- the most suitable position of the guides 5, and thus of the rods 1 - for an efficient presenting of the various weft yarns - is obtained by acting on adjustable supports 6.
- each of the flexible cables 3 controlling the rods 1 is operated by a linear electric motor.
- the linear electric motors 7 are positioned radially, each aligned on the common axis of the rod 1, of the flexible cable 3 and of the corresponding guide 5 and sheath 4. These motors act directly on the flexible cables 3, causing short rectilinear alternate movements thereof, of adjustable amplitude. Equal movements are thus imparted on the rods 1.
- the linear electric motors 8 are positioned in block and they operate the flexible cables 3 each through a rotating lever 9, to which the cable 3 is anchored in 10 and which is caused to perform, by the respective motor 8, short angular back and forth movements of adjustable amplitude (to which correspond short rectilinear alternate movements, of adjustable amplitude, of the rods 1).
- linear electric motors used are of the conventional type and are hence not described in detail; it should simply be remembered that they allow to perform very precise movements, even if of limited amplitude, and to carry out a very precise adjustment of the operating times, of the working speeds, of the length and amplitude of the movements.
- the presenting device is completed by electronic control meanspreferably comprising a microprocessor - which also require no particular description as they are of conventional type. These means, shown by 11 in figure 2, are connected to the electronic control system 12 of the loomto which the presenting device of the invention is applied - and to the linear electric motors 7 or 8, so as to allow constantly detecting, by way of a position sensor 13, the position taken up by the corresponding presenting rods 1.
- the control system can therefore detect the tension of the weft yarn being inserted by the gripper into the warp shed, by measuring the feed current required by the bobbin to balance the force resulting on the eyelet 2. It ensues that the rod 1 in a presenting position can also act - see figure 4 - as tension regulator during insertion, in that, according to the position of the eyelet 2 at the end of the presenting rod 1, in respect of fixed yarnguidzs 14, 15, weft yarn tension (T) varies to a certain extent during insertion. In fact, the more the eyelet 2 moves down in respect of the yarnguides 14, 15, the wider the winding angles of the weft yarn around said yarnguides.
- the device according to the invention requires no mechanical motion transmissions and can thus be associated to the loom in the most functional area, for instance in a position high above the presenting area, so as not to hamper the intervention of the weaver and the insertion of the wefts.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Surgical Instruments (AREA)
- Endoscopes (AREA)
Abstract
Description
- The present invention concerns a weft yarn presenting device for gripper looms.
- As known, in shuttleless looms of the type with grippers, one or more weft yarns are inserted by a pair of grippers with alternate motion, cooperating at the centre of the shed, into the sequence of the warp yarns forming said shed.
- The proper succession of weft insertions and of the exchanged positions of the warp yarns, by way of the weave devices, determines the formation of the desired fabric. The need hence arises to insert into the warp shed a certain sequence of weft yarns which, according to the fabric having to be produced, can vary in colour, type and size.
- For this reason, it has now become generally widespread to use in gripper looms the so-called presenting devices, i.e. devices performing the function of selecting the weft yarns to be inserted and presenting them to the weft carrying or insertion grippers. Such devices substantially comprise one or more rods having an eyelet into which passes a respective weft yarn to be presented. When one of said eyelets moves, it shifts the respective weft yarn from a rest position far from the gripper trajectory, to another position (called presenting position) wherein the weft yarn can be gripped by the carrying gripper and conveyed towards and into the warp shed.
- At present, in weft presenting devices for gripper looms, use is generally made of mechanical selection units, which can be functionally disassembled in two parts:
- a) moving unit: it is a group of mechanical elements apt to perform an alternate rotary and rectilinear motion within the weft presenting members, according to a motion law defined by kinematic mechanisms and/or by suitable cams;
- b) selecting unit: it is a group of mechanical and/or electromagnetic hooking elements apt to select which weft or wefts, among those in a rest position, should be presented by the unit a).
- Such mechanical presenting devices have the following inconveniences:
- The motion law for presenting each weft is a fixed law. To change said law it is necessary to replace some mechanical elements or to carry out manual adjustments. It is hence practically impossible, when changing the article having to be produced, to adapt said motion law to the physical-textile features of the different types of wefts having to be presented, or to change the motion laws for the various wefts in order to improve, for instance, the separation of the wefts during the forward and backward movement in the presenting step.
- The unit b) can start selecting the weft only after the previously presented weft has returned to its rest position, whereby it is not possible to overlap the forward movement of a rod to the backward movement of another rod. This overlapping would allow to dispose of more time for said movements and would thus involve less mechanical stresses.
- It is known that, in weaving, to prevent weaving faults when an inserted weft yarn breaks or remains incomplete in the warp shed, the loom has to be stopped in order to remove the broken weft. This stop is usually preceded by a missed insertion - that is, by an inlet and outlet stroke of the grippers into the warp shed, with no weft yarn - so as to prevent weaving problems and position again the loom in correspondence of the weft yarn having to be removed. Hence, in this insertion, the presenting step should not take place.
- On the other hand, weft control ends when the gripper moves out of the warp shed and the selection step requires a certain time for the yarn to be hooked, which depends on the force of the electromagnet and/or on the masses of the mechanical hooking elements having to be shifted. As loom speed increases, said time corresponds to wider rotation angles of the loom for the selection step, hence to the detriment of the angles utilizable for the presenting step, the reduction of which leads to an increase in the mechanical stresses, in the wears and in the vibrations of the presenting device. To avoid these last inconveniences, one is forced to anticipate the start of the selection step before the outlet of the gripper from the warp shed - which outlet determines the final time within which weft control can take place - rather than reducing the times for the presenting step.
- Thus, if weft selection and forward movement are anticipated in respect of gripper outlet from the warp shed, when the loom issues a stop signal establishing the need to exclude weft selection, this latter may have already taken place and the weft may have already been moved into the gripper hooking zone. It is then necessary to use further auxiliary devices to remove the yarn from the gripper trajectories, which devices can however cause various problems, as loosening of the weft and difficulties of adjustment.
- The mechanical presenting devices require furthermore a motion transmission obtained with a mechanical drive by means of belts, chains or gears, which cause problems of alignment on assembly, require maintenance and limit the choice of the most suitable positioning on the loom for a proper weaving operation.
- It is moreover not possible, without further complications, to operate the mechanical presenting device independently from the loom, in order to move the presenting rod from its rest position when the loom is not working, so as to facilitate operations of weft insertion into the eyelet of the presenting rod.
- Finally, the mechanical selection units are relatively large and thus hamper the weaver's work on the machine, as well as weft insertion into the eyelets of the presenting rods.
- All these drawbacks are fully overcome by the presenting device according to the invention, which is electrically operated and electronically controlled and which provides many advantages in respect of the known presenting devices.
- Said device is of the type comprising a plurality of presenting rods having a yarn guiding eyelet, which converge towards the zone in which the weft yarn has to be gripped by the loom carrying gripper and which are each controlled by a flexible cable sliding into a sheath, and is characterized in that each of the flexible cables controlling said rods is operated by a linear electric motor.
- The linear electric motor can operate the corresponding flexible cable either directly, by acting along the main axis of said cable and/or of the rod controlled by the same in order to produce short alternate rectilinear movements thereof, or through a rotary lever caused to perform short angular back and forth movements.
- The rods of the device are moreover guided into a stiff guide, in respect of which they are preferably prevented from rotating.
- To each linear electric motor of the device there are associated electronic control means, preferably comprising a microprocessor, apt to constantly detect the position of the presenting rod operated by said motor and to govern the motor according to said position, to the working of the loom and to the physical/textile features of the yarn being woven.
- Furthermore, in the device according to the invention, each of the presenting rods can act so as to regulate the tension of the weft yarn moved by the same.
- The invention is now described in further detail, with reference to the accompanying drawings, which illustrate two different embodiments thereof and in which:
- Fig. 1 is a general diagrammatic view of a weft presenting device according to the invention, wherein each of the presenting rods is directly operated by the respective linear electric motor;
- Fig. 2 is a diagrammatic view, with some constructive details, showing a single presenting rod of the device according to the invention, operated by the linear motor through rotary levers;
- Fig. 3 is a diagram illustrating the working of the device; and
- Fig. 4 shows one of the presenting rods of the device acting as weft yarn tension regulator.
- Referring to the first two figures of the drawings, the device according to the invention comprises - in known manner - a plurality of presenting
rods 1, ending with aneyelet 2 for the weft yarn f and each controlled by aflexible cable 3 sliding into asheath 4. Figure 1 shows, by way of example, a device with eightrods 1, of which only one can be seen in figure 2. Also in known manner therods 1, which are slidably guided intostiff guides 5 wherein their rotation is prevented, converge into the zone P where the weft yarn has to be gripped by the loom carrying gripper to be drawn into the shed. The most suitable position of theguides 5, and thus of the rods 1 - for an efficient presenting of the various weft yarns - is obtained by acting onadjustable supports 6. - Instead of being mechanically operated - like the conventional presenting devices - the device according to the invention is electrically operated. More precisely, each of the
flexible cables 3 controlling therods 1 is operated by a linear electric motor. - According to the embodiment of figure 1, the linear
electric motors 7 are positioned radially, each aligned on the common axis of therod 1, of theflexible cable 3 and of thecorresponding guide 5 andsheath 4. These motors act directly on theflexible cables 3, causing short rectilinear alternate movements thereof, of adjustable amplitude. Equal movements are thus imparted on therods 1. - According to the embodiment of figure 2, the linear
electric motors 8 are positioned in block and they operate theflexible cables 3 each through arotating lever 9, to which thecable 3 is anchored in 10 and which is caused to perform, by therespective motor 8, short angular back and forth movements of adjustable amplitude (to which correspond short rectilinear alternate movements, of adjustable amplitude, of the rods 1). - The linear electric motors used are of the conventional type and are hence not described in detail; it should simply be remembered that they allow to perform very precise movements, even if of limited amplitude, and to carry out a very precise adjustment of the operating times, of the working speeds, of the length and amplitude of the movements.
- The presenting device is completed by electronic control meanspreferably comprising a microprocessor - which also require no particular description as they are of conventional type. These means, shown by 11 in figure 2, are connected to the
electronic control system 12 of the loomto which the presenting device of the invention is applied - and to the linearelectric motors position sensor 13, the position taken up by thecorresponding presenting rods 1. - From the above description, it can easily be understood how the presenting device according to the invention is apt to work with the following characteristics:
- The motion law for presenting each weft yarn inserted into the
rods 1 and returning it to its rest position, can be optimized for what concerns the forward and backward movements, the speed, the acceleration, the stopping times in the presenting position and in the rest position, which can be programmed according to the physical/textile features of the yarn. Said law can be differentiated according to the weft position at rest in respect of the gripper. - The control system of the device can actively operate to modify the strokes, speeds, accelerations, and starting and/or ending moments of the presenting and/or returning law, according to the statistical tendency of the weft stops detected by the loom control system and attributed to the presenting device. It is also apt to signal to the operator any problems by way of a suitable diagnostic program.
- The control system of the device is apt, thanks to the
position sensor 13, to control the acceleration and deceleration of the presentingrod 1, and to thus brake the same without having to stop it by means of stops. This determines a regular movement with no impacts and wears. - As shown in figure 3, it is possible to overlap the forward presenting movement of a rod to the return movement of another rod, so as to prevent the wefts from coming into contact and/or loosening, and reduce the stresses on the yarns and on the mechanical elements, deriving from the presenting laws.
- It is possible to start, if required, the weft presenting step before the gripper has moved out of the warp shed, since at any momentand particularly when the loom stopping signal due to weft is issued - it is possible to interrupt, by way of the control system, the forward movement for presenting the selected weft and cause the same to return to its rest position, thereby preventing the gripper from hooking said weft and excluding weft selection without having to use any other more complicated systems.
- The selection times are negligible and do not affect the presenting times.
- In any position, and particularly in the presenting position, the linear electric motor reacts - thanks to the control system - to any external force imparted on the selection rod, which would be inclined to shift it from the position detected by the
sensor 13, by imparting a proportional opposition force allowing to keep said rod in the required position. - It is also important to note that, at the moment of weft presenting, the force acting on the
eyelet 2 for the weft yarn f, is proportional to the tension of said weft yarn. - The control system can therefore detect the tension of the weft yarn being inserted by the gripper into the warp shed, by measuring the feed current required by the bobbin to balance the force resulting on the
eyelet 2. It ensues that therod 1 in a presenting position can also act - see figure 4 - as tension regulator during insertion, in that, according to the position of theeyelet 2 at the end of the presentingrod 1, in respect offixed yarnguidzs eyelet 2 moves down in respect of theyarnguides - The device according to the invention requires no mechanical motion transmissions and can thus be associated to the loom in the most functional area, for instance in a position high above the presenting area, so as not to hamper the intervention of the weaver and the insertion of the wefts.
- It is understood that there can be other practical embodiments of the invention, differing from those described and illustrated, which fully fall within the scope of the present invention.
Claims (11)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2059890 | 1990-06-11 | ||
IT02059890A IT1248715B (en) | 1990-06-11 | 1990-06-11 | WEFT PRESENTATION DEVICE FOR CLAMPS WEAVING FRAMES |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0461524A1 true EP0461524A1 (en) | 1991-12-18 |
EP0461524B1 EP0461524B1 (en) | 1995-02-22 |
EP0461524B2 EP0461524B2 (en) | 1999-03-10 |
Family
ID=11169360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91109116A Expired - Lifetime EP0461524B2 (en) | 1990-06-11 | 1991-06-04 | Weft yarn presenting device for gripper looms |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0461524B2 (en) |
AT (1) | ATE118831T1 (en) |
DE (1) | DE69107517T3 (en) |
DK (1) | DK0461524T3 (en) |
ES (1) | ES2069120T5 (en) |
GR (1) | GR3015932T3 (en) |
HK (1) | HK46396A (en) |
IT (1) | IT1248715B (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0598264A1 (en) | 1992-11-16 | 1994-05-25 | Picanol N.V. | Device to select and feed weft yarns for a loom |
EP0638677A1 (en) * | 1993-08-02 | 1995-02-15 | Lindauer Dornier Gesellschaft M.B.H | Device to feed weft yarns to a weft inserting device in looms |
EP0676493A1 (en) * | 1994-04-05 | 1995-10-11 | PANTER S.r.l. | Weft yarn presentation device for looms |
DE29713979U1 (en) * | 1997-07-04 | 1997-10-16 | Textilma Ag, Hergiswil | Warp knitting machine, in particular crochet galloon machine |
EP0894882A2 (en) * | 1997-07-30 | 1999-02-03 | NUOVO PIGNONE S.p.A. | Selector device for weft yarn presentation in shuttleless looms |
EP0894883A2 (en) * | 1997-07-30 | 1999-02-03 | NUOVO PIGNONE S.p.A. | Modular device for weft yarn presentation in shuttleless looms |
EP1024214A1 (en) * | 1999-01-28 | 2000-08-02 | Sulzer Textil Ag | Device and system for positioning a weft yarn in a gripper loom |
JP2001098443A (en) * | 1999-09-23 | 2001-04-10 | Sulzer Textil Ag | Loom provided with insertion system for a plurality of different wefts |
US6230760B1 (en) | 1999-01-28 | 2001-05-15 | Sulzer Textil Ag | Linear motor weft presenting apparatus |
EP1099784A1 (en) | 1999-09-23 | 2001-05-16 | Sulzer Textil AG | Weaving machine with a device for inserting a plurality of generally different weft threads |
EP1353000A1 (en) * | 2002-04-10 | 2003-10-15 | Lin, Chen-Hui | Weft selection device for a strap weaving machine |
EP1500731A1 (en) * | 2003-07-10 | 2005-01-26 | Promatech S.p.A. | Presenting device for weaving looms having a single presenting rod |
EP1777327A1 (en) * | 2005-10-20 | 2007-04-25 | Luigi Omodeo Zorini | Neddle loom with automatic change of the weft thread |
ITUB20160421A1 (en) * | 2016-02-01 | 2016-05-01 | Rinaldo Sperotto | ROTARY PRESENTING MACHINE for mechanical preselection and electronic control card machines |
CN113417052A (en) * | 2021-07-19 | 2021-09-21 | 杭州纳众科技有限公司 | Weft selector connection structure and weft selector |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH418248A (en) * | 1964-10-26 | 1966-07-31 | Scheffel Walter | Color changing device for shuttleless looms |
CH450315A (en) * | 1967-05-09 | 1968-01-15 | Rueti Ag Maschf | Arrangement for the optional feeding of weft threads of various types to a thread take-over point |
US3780775A (en) * | 1972-08-25 | 1973-12-25 | Rockwell International Corp | Weft control mechanism for shuttleless looms |
EP0077309A2 (en) * | 1981-06-10 | 1983-04-20 | Tsudakoma Kogyo Kabushiki Kaisha | A weft selector for looms |
EP0123772A1 (en) * | 1983-04-27 | 1984-11-07 | Emil Jäger GmbH & Co. KG | Weft inserting device for weaving machines |
-
1990
- 1990-06-11 IT IT02059890A patent/IT1248715B/en active IP Right Grant
-
1991
- 1991-06-04 AT AT91109116T patent/ATE118831T1/en not_active IP Right Cessation
- 1991-06-04 DE DE69107517T patent/DE69107517T3/en not_active Expired - Fee Related
- 1991-06-04 EP EP91109116A patent/EP0461524B2/en not_active Expired - Lifetime
- 1991-06-04 DK DK91109116.3T patent/DK0461524T3/en active
- 1991-06-04 ES ES91109116T patent/ES2069120T5/en not_active Expired - Lifetime
-
1995
- 1995-04-26 GR GR950401058T patent/GR3015932T3/en unknown
-
1996
- 1996-03-14 HK HK46396A patent/HK46396A/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH418248A (en) * | 1964-10-26 | 1966-07-31 | Scheffel Walter | Color changing device for shuttleless looms |
CH450315A (en) * | 1967-05-09 | 1968-01-15 | Rueti Ag Maschf | Arrangement for the optional feeding of weft threads of various types to a thread take-over point |
US3780775A (en) * | 1972-08-25 | 1973-12-25 | Rockwell International Corp | Weft control mechanism for shuttleless looms |
EP0077309A2 (en) * | 1981-06-10 | 1983-04-20 | Tsudakoma Kogyo Kabushiki Kaisha | A weft selector for looms |
EP0123772A1 (en) * | 1983-04-27 | 1984-11-07 | Emil Jäger GmbH & Co. KG | Weft inserting device for weaving machines |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0598264A1 (en) | 1992-11-16 | 1994-05-25 | Picanol N.V. | Device to select and feed weft yarns for a loom |
EP0763613A2 (en) | 1992-11-16 | 1997-03-19 | Picanol N.V. | Device to select and feed weft yarns for a loom |
EP0763613A3 (en) * | 1992-11-16 | 1997-10-01 | Picanol Nv | Device to select and feed weft yarns for a loom |
EP0638677A1 (en) * | 1993-08-02 | 1995-02-15 | Lindauer Dornier Gesellschaft M.B.H | Device to feed weft yarns to a weft inserting device in looms |
EP0676493A1 (en) * | 1994-04-05 | 1995-10-11 | PANTER S.r.l. | Weft yarn presentation device for looms |
DE29713979U1 (en) * | 1997-07-04 | 1997-10-16 | Textilma Ag, Hergiswil | Warp knitting machine, in particular crochet galloon machine |
US6182476B1 (en) | 1997-07-04 | 2001-02-06 | Textilma Ag | Warp knitting loom, in particular crochet galloon machine |
EP0894882A2 (en) * | 1997-07-30 | 1999-02-03 | NUOVO PIGNONE S.p.A. | Selector device for weft yarn presentation in shuttleless looms |
EP0894883A3 (en) * | 1997-07-30 | 1999-06-02 | NUOVO PIGNONE S.p.A. | Modular device for weft yarn presentation in shuttleless looms |
EP0894882A3 (en) * | 1997-07-30 | 1999-06-02 | NUOVO PIGNONE S.p.A. | Selector device for weft yarn presentation in shuttleless looms |
US6006795A (en) * | 1997-07-30 | 1999-12-28 | Corain; Luciano | Linear motor selector device for weft yarn presentation in shuttleless looms |
US6026864A (en) * | 1997-07-30 | 2000-02-22 | Corain; Luciano | Modular device for weft yarn presentation in shuttleless looms |
EP0894883A2 (en) * | 1997-07-30 | 1999-02-03 | NUOVO PIGNONE S.p.A. | Modular device for weft yarn presentation in shuttleless looms |
EP1024214A1 (en) * | 1999-01-28 | 2000-08-02 | Sulzer Textil Ag | Device and system for positioning a weft yarn in a gripper loom |
US6230760B1 (en) | 1999-01-28 | 2001-05-15 | Sulzer Textil Ag | Linear motor weft presenting apparatus |
JP2001098443A (en) * | 1999-09-23 | 2001-04-10 | Sulzer Textil Ag | Loom provided with insertion system for a plurality of different wefts |
EP1099784A1 (en) | 1999-09-23 | 2001-05-16 | Sulzer Textil AG | Weaving machine with a device for inserting a plurality of generally different weft threads |
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 |
EP1353000A1 (en) * | 2002-04-10 | 2003-10-15 | Lin, Chen-Hui | Weft selection device for a strap weaving machine |
EP1500731A1 (en) * | 2003-07-10 | 2005-01-26 | Promatech S.p.A. | Presenting device for weaving looms having a single presenting rod |
EP1777327A1 (en) * | 2005-10-20 | 2007-04-25 | Luigi Omodeo Zorini | Neddle loom with automatic change of the weft thread |
US7441567B2 (en) | 2005-10-20 | 2008-10-28 | Luigi Omodeo Zorini | Needle loom with automatic change of the weft thread |
ITUB20160421A1 (en) * | 2016-02-01 | 2016-05-01 | Rinaldo Sperotto | ROTARY PRESENTING MACHINE for mechanical preselection and electronic control card machines |
CN113417052A (en) * | 2021-07-19 | 2021-09-21 | 杭州纳众科技有限公司 | Weft selector connection structure and weft selector |
Also Published As
Publication number | Publication date |
---|---|
DE69107517T2 (en) | 1995-08-10 |
DE69107517D1 (en) | 1995-03-30 |
DK0461524T3 (en) | 1995-07-24 |
EP0461524B1 (en) | 1995-02-22 |
HK46396A (en) | 1996-03-22 |
ES2069120T5 (en) | 1999-08-01 |
GR3015932T3 (en) | 1995-07-31 |
IT9020598A1 (en) | 1991-12-11 |
IT9020598A0 (en) | 1990-06-11 |
ATE118831T1 (en) | 1995-03-15 |
ES2069120T3 (en) | 1995-05-01 |
DE69107517T3 (en) | 2000-08-10 |
EP0461524B2 (en) | 1999-03-10 |
IT1248715B (en) | 1995-01-26 |
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