US20070169831A1 - Weaving device - Google Patents
Weaving device Download PDFInfo
- Publication number
- US20070169831A1 US20070169831A1 US10/564,767 US56476704A US2007169831A1 US 20070169831 A1 US20070169831 A1 US 20070169831A1 US 56476704 A US56476704 A US 56476704A US 2007169831 A1 US2007169831 A1 US 2007169831A1
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- US
- United States
- Prior art keywords
- shed
- weaving device
- clew
- weft yarn
- packed
- 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.)
- Abandoned
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Classifications
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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
- D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
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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
- D03D47/24—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 by gripper or dummy shuttle
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D49/00—Details or constructional features not specially adapted for looms of a particular type
- D03D49/24—Mechanisms for inserting shuttle in shed
- D03D49/42—Mechanisms for inserting shuttle in shed whereby the shuttle is propelled by liquid or gas pressure
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D49/00—Details or constructional features not specially adapted for looms of a particular type
- D03D49/24—Mechanisms for inserting shuttle in shed
- D03D49/50—Miscellaneous devices or arrangements concerning insertion of weft and not otherwise provided for
Definitions
- the invention relates to a weaving device comprising means for forming a shed consisting of warp yarns, with insertion means being disposed on one side or on both sides of the shed for inserting a weft yarn into the shed.
- Weaving devices of the above kind are generally known, for example from Dutch patent application No. 73/09850.
- a weft yarn from a supply bobbin is connected to a projectile, also called shuttle, which projectile is launched by the insertion means disposed on either side of the shed, using a medium under pressure, for example compressed air, and carried through the shed via guides disposed in the shed.
- a medium under pressure for example compressed air
- a drawback of this known device is the fact that all the energy required for moving the projectile through the shed must be imparted to the projectile at the beginning of the movement, i.e. at the location of the insertion means.
- a large amount of energy has be supplied to the projectile at the beginning of its movement, which means a very high initial velocity, resulting in high peak tensions in the weft yarn to be transported.
- the projectile needs to have a fairly high inert mass.
- auxiliary blowers are disposed in the shed, which auxiliary blowers are provided with outflow openings for the medium under pressure that impacts on an impact surface of the projectile to be guided during operation so as to assist in the movement of the projectile through the shed.
- the object of the invention is to provide a weaving device as referred to in the introduction, which weaving device is of significantly simplified construction and which is much simpler to control.
- the weaving device is to that end characterized in that the weft yarn has been formed into a packed clew, which packed clew unwinds into an elongated weft yarn upon insertion into the shed.
- the lighter components furthermore enable a much greater speed of operation of the weaving device according to the invention, which means high-speed weaving, for example with a much greater insertion speed, in terms of time, of weft yarns into the shed. More particularly, it is the clew rather than the yarn itself on which the forces are exerted upon insertion thereof. Now that no loose yarns are individually inserted into the shed any more, with a clewed weft yarn being inserted, peak tensions in the yarn are prevented, since it is the clew (rather than a yarn) that is now subjected to the acceleration forces that are exerted by the insertion means upon insertion.
- the insertion means are arranged to fix the packed clew upon insertion into the shed at a yarn section that projects from the clew.
- the insertion means may comprise a gripping element for fixing the yarn section.
- the packed clew has its own consistent shape.
- the weft yarn of the packed clew is provided-with a bonding agent, for example a glue or a wax.
- a bonding agent for example a glue or a wax.
- ice is used as the bonding agent, more in particular “dry ice”.
- the packed clew can be moved through the shed by means of a carrier.
- the packed clew may be arranged round the carrier in one or more windings; in a specific embodiment, the carrier envelopes the packed clew at least partially. In the latter embodiment, the packed clew does not need to have a consistent shape, but the clew retains its shape as a result of the presence of the envelope.
- the clew After being inserted, the clew unwinds during its movement through the shed. The moment the clew has unwound into an elongated weft yarn, the carrier envelope may be intercepted at the end of the shed and be discharged, for example for forming a new clew.
- the carrier is made of a rigid material, for example a plastic, or of a flexible material, for example a foil.
- the clewed weft yarn is given a consistent external shape, which still has a certain inert mass, however.
- the insertion means comprise an elongated tube, which tube is directed towards the shed with an open end thereof and which can be connected to means for supplying the medium under pressure at its other end.
- Said medium under pressure may be compressed air or water.
- the weft yarn has a certain, limited length, having at least one end projecting from the clew.
- several clewed weft yarns are interconnected via intermediate yarn sections, which clewed weft yarns can subsequently be inserted into the shed one after another by the insertion means.
- Said several clewed weft yarns may be formed of one yarn, which clewed weft yarns may be present on a winding element in one or more windings.
- the invention also relates to a weft yarn as described in the present application.
- FIGS. 1 and 2 show a weaving device according to the prior art
- FIGS. 3 a - 3 e show various embodiments of a clewed weft yarn according to the invention
- FIG. 4 shows an embodiment of the insertion means of a weaving device according to the invention
- FIGS. 5 a - 5 b show further aspects of the invention.
- FIGS. 1 and 2 an embodiment of a known weaving device is shown, for example the device that is described in Dutch patent application No. 73/09850 or Dutch patent No. 1004173.
- the known weaving device comprises a lay 1 and means 2 for forming a shed 3 of warp yarns 4 , which warp yarns 4 come from warp yarn supply bobbins 5 .
- a large number of dents 6 are arranged on the lay 1 , which dents can move between the warp yarns 4 .
- a number of guides 7 are furthermore arranged on the lay 1 for guiding a projectile 8 from one side to the other side.
- the projectile 8 is present in an insertion station 9 disposed on the left-hand side of the shed 3 , whilst a braking station 10 is disposed at the other side of the shed 3 .
- a weft yarn 11 from a supply bobbin 12 can be connected to the projectile 8 in a known manner.
- a considerable amount of impulse energy is imparted to the projectile 8 by means of a medium under pressure, for example compressed air or water.
- the projectile 8 undergoes an acceleration and is moved or “shot” through the shed 3 at a high velocity, carrying along the weft yarn 11 .
- the projectile 8 is also called the shuttle, therefore.
- the projectile 8 that moves through the shed 3 at a high velocity must be decelerated on the other side of the shed 3 (on the right in FIG. 1 ).
- a braking station 10 is disposed directly beside the shed 33 which station 10 intercepts and decelerates the projectile as it leaves the shed 3 .
- the projectile 8 can be moved (“shot”) from the right-hand side to the left-hand side of the shed 3 at a high velocity by an insertion station 93 (not shown) arranged analogously to the insertion station 9 , which is disposed on the right-hand side of the shed 3 .
- a braking station 10 ′ (not shown) is furthermore disposed at the location of the insertion station 9 for intercepting and decelerating a projectile 8 moving from the right-hand side to the left-hand side of the shed 3 .
- the high inert mass of the projectile 8 and the frequently considerable width L of the shed 3 require that the projectile 8 be moved through the shed 3 at a relatively high velocity.
- the acceleration forces thus generated lead to undesirable peak tensions in the weft yarn 11 being carried along, which may cause the yarn to break.
- the projectile 8 moving through the shed at a high velocity must be intercepted at the end of the shed and be decelerated by a separate braking station 10 ( 10 ′). Said deceleration, too, may lead to undesirable peak tensions in the weft yarn, especially in situations in which the weft yarn is used for decelerating the projectile.
- Each guide 7 is provided with medium outflow openings (not shown in FIG. 1 ) oriented in the direction of transport of the projectile 8 .
- the medium outflow openings are directed towards an impact surface of the projectile 8 , so that the pressurised medium flowing out of the openings will impact on said impact surface and thus transmit the energy from the medium to the projectile 8 .
- the auxiliary blowers 7 thus assist in the movement of the projectile 8 through a shed 3 , thus obviating the need for a high initial speed to be imparted to the projectile by the insertion station 9 .
- FIGS. 3 a - 3 d show specific embodiments of an important aspect of the weaving device according to the invention.
- the weft yarn 11 has been formed into a clew 20 , which is preferably given a consistent shape by using a binding or bonding agent 22 , for example.
- said binding or bonding agent 22 may be a glue.
- wax appears to be very suitable for giving the left yarn 11 a consistent shape, however.
- the bonding agent prevents the clew 20 from falling apart into a loose mass of yarn during its movement through the shed 3 , which would inevitably lead to weaving faults and/or failure of the device.
- each clew 20 By fixing the clew 20 at a yarn section 21 projecting from the clew 20 , the clew 20 is unwound or uncoiled into an elongated, fully uncoiled weft yarn 11 during its movement through the shed 3 .
- each clew 20 once it is fully uncoiled, thus has a length equal to the width L of the shed 3 . See also FIG. 4 .
- FIGS. 3 b and 3 c show other embodiments of the weft yarn 11 formed into a clew 20 , which is surrounded by carriers 23 and 24 , respectively.
- the carrier 23 is in the form of an encasing of a hard yet light plastic, which surrounds the clew 20 .
- the sleeve is provided with an opening 23 a, which enables placement of the clew 23 into the encasing prior to insertion of the assembly into the shed on the one hand and unwinding of the clew 20 present in the encasing 23 on the other hand.
- FIG. 3 c shows a similar embodiment, in which the carrier is made of a flexible material, for example a foil.
- the clew 20 does not have a consistent shape of itself in this embodiment, its shape being determined by the carrier 24 that surrounds the clew 20 .
- the clew 20 will have a certain inert mass, too, which makes it possible to move said clew 20 through the shed 3 by means of a medium under pressure.
- the weft yarn 11 formed into a clew 20 unwinds from the foil casing 24 at the location indicated at 24 a during its movement through the shed 3 .
- the clew 20 has fully unwound into an elongated weft yarn 11 , and the foil encasing is regarded as waste which, on account of its low weight, can easily be separated and be discharged, for example by being exhausted.
- FIG. 3 a Another embodiment of the weft yarn 11 formed into a clew 20 as shown in FIG. 3 a, which has its own consistent shape, uses ice, in particular dry ice, as the binding or bonding agent. Said embodiment may be realised, for example, by moisturising the clew 20 with water and subsequently freezing it. The ice particles will fragmentize at the location where the left yarn 11 is pulled off a clew 20 during the movement through the shed.
- FIG. 3 d Yet another embodiment is shown in FIG. 3 d, in which the weft yarn 11 is wound on a carrier 25 in one or more windings 20 a - 20 f, thus forming a clew 20 .
- This carrier too, has a low inert mass and can be moved or “shot” through the shed 3 by suitable insertion means. The left yarn 11 will unwind from the carrier 25 during its movement through the shed 3 . In this case, too, the carrier 25 can be intercepted at the end of the shed 3 and be reused.
- the clew 20 is given a certain consistency of its own by the addition of means having a low inert mass. Said consistency makes it easier to handle the clew, for example position it in the insertion means. In addition it enables the insertion or “shooting” of the clew into the shed at great velocity by the insertion means, using a medium under pressure.
- FIG. 4 shows an embodiment of the insertion means for use with a weaving device according to the invention.
- the insertion means indicated at 9 in FIG. 1 , comprise an elongated cube 30 having an open end 30 a, which is directed towards the shed 3 .
- the other end 30 b is provided with an opening that can be connected or coupled to means for supplying medium under pressure.
- a weft yarn 11 formed into a clew 20 is present inside the elongated tube 30 , which in fact functions as a launching tube, in accordance with any one of the embodiments as shown in FIGS. 2A-2D .
- the yarn section 21 projecting from the clew 20 is fixed by the launching tube 30 at the location indicated at 30 c.
- the clew 20 is launched into the shed 3 from the tube as a result of the pressure buildup generated by feeding a certain amount of medium under pressure P to the space 31 between the tube 30 and the clew 20 via the opening 30 b.
- the launched clew 20 By fixing the yarn section 21 in the launching tube 30 at the location indicated at 30 c, the launched clew 20 unwinds into a full-length, elongated weft yarn 11 in the shed 3 .
- the insertion means 9 may be readied for inserting a next clew 20 into the shed 3 .
- Said repeated “loading” and “unloading” of the launching tube 30 with a new clew 20 which, after being launched into the shed 3 , unwinds into an elongated left yarn 11 having a length that is substantially equal to the width L of the shed 3 , can be further automated, especially if the various clews 20 are interconnected by means of intermediate yarn sections 21 .
- FIG. 5 a shows several clews 201 - 206 , each comprising a packed weft yarn 111 - 116 , which, in unwound form, has a length equal to or slightly smaller than the width L of the shed 3 . See also FIG. 4 .
- Intermediate yarn sections 211 - 216 are to be fixed by the insertion means 9 , this in order to enable unwinding of the clew 201 - 206 into an elongated left yarn 11 in the shed 3 .
- the various clews 201 - 206 are formed of a single yarn 26 .
- FIG. 5 b shows yet another a specific embodiment of the insertion means 9 , which, in addition to the launching tube 30 , also comprise a winding element 35 , on which the various weft yarns 111 - 1110 formed into clews 201 - 2010 are arranged in one or more windings. Rotation of the winding element 35 causing the windings of the clews 201 - 2010 to be unwound in the direction of the opening 30 c of the launching tube 30 .
- the opening 30 c can be opened temporarily and be closed again for passing a clew 202 , with the intermediate yarn section 211 - 212 being fixed each time the tube is opened and closed again.
- the clew is shot into the shed 3 , causing it to unwind into an elongated weft yarn 112 .
Abstract
The invention relates to a weaving device comprising means for forming a shed consisting of warp yarns, with insertion means being disposed on one side or on both sides of the shed for inserting a weft yarn into the shed. The object of the invention is to provide a weaving device as referred to in the introduction, which weaving device is of significantly simplified construction and which is much simpler to control. According to the invention, the weaving device is to that end characterized in that the weft yarn has been formed into a packed clew, which packed clew unwinds into an elongated weft yarn upon insertion into the shed. These aspects obviate the need to use a projectile having a high inert mass and the related insertion means and braking means for moving and decelerating the movement of the projectile through the shed, resulting in a weaving device of significantly simplified construction, which is much simpler to control and which can be operated at a much higher rate.
Description
- The invention relates to a weaving device comprising means for forming a shed consisting of warp yarns, with insertion means being disposed on one side or on both sides of the shed for inserting a weft yarn into the shed.
- Weaving devices of the above kind are generally known, for example from Dutch patent application No. 73/09850. With this type of weaving devices, a weft yarn from a supply bobbin is connected to a projectile, also called shuttle, which projectile is launched by the insertion means disposed on either side of the shed, using a medium under pressure, for example compressed air, and carried through the shed via guides disposed in the shed.
- A drawback of this known device is the fact that all the energy required for moving the projectile through the shed must be imparted to the projectile at the beginning of the movement, i.e. at the location of the insertion means. In order to be able to carry the projectile through a shed of reasonable width, a large amount of energy has be supplied to the projectile at the beginning of its movement, which means a very high initial velocity, resulting in high peak tensions in the weft yarn to be transported. Furthermore this means that the projectile needs to have a fairly high inert mass. These aspects of the known weaving device impose limitations on the functionality thereof as regards the speed, the complexity and the maximum width of the fabric to be manufactured.
- The above limitations are partially overcome by a weaving device as described in Dutch patent application No. 1004173. In this weaving device auxiliary blowers are disposed in the shed, which auxiliary blowers are provided with outflow openings for the medium under pressure that impacts on an impact surface of the projectile to be guided during operation so as to assist in the movement of the projectile through the shed. Using these aspects, it is no longer necessary to impart all the energy required for carrying the projectile through the shed to the projectile at the beginning of the shed. Although in fact the width of the shed is no longer bound by limitations when auxiliary blowers are used, it is still necessary to use a projectile having a high inert mass, and this embodiment of a known weaving device is more complex as regards its construction and control.
- The object of the invention is to provide a weaving device as referred to in the introduction, which weaving device is of significantly simplified construction and which is much simpler to control. According to the invention, the weaving device is to that end characterized in that the weft yarn has been formed into a packed clew, which packed clew unwinds into an elongated weft yarn upon insertion into the shed. The above aspects obviate the need to use a projectile having a high inert mass and the related insertion means and braking means for moving and decelerating the movement of the projectile through the shed, resulting in a weaving device which is of significantly simplified construction and which is much simpler to control.
- The lighter components (no heavy components are used) furthermore enable a much greater speed of operation of the weaving device according to the invention, which means high-speed weaving, for example with a much greater insertion speed, in terms of time, of weft yarns into the shed. More particularly, it is the clew rather than the yarn itself on which the forces are exerted upon insertion thereof. Now that no loose yarns are individually inserted into the shed any more, with a clewed weft yarn being inserted, peak tensions in the yarn are prevented, since it is the clew (rather than a yarn) that is now subjected to the acceleration forces that are exerted by the insertion means upon insertion.
- Since the unwinding of the clew into a weft yarn upon insertion into the shed takes place in a gradual manner, a substantially constant, low tension is present in the weft yarn, without the peak tension that usually occurs during the sudden braking action that takes place in the currently known weaving machines.
- In a specific embodiment, in order to effect an improved unwinding of the packed clew into an elongated weft yarn in the shed, the insertion means are arranged to fix the packed clew upon insertion into the shed at a yarn section that projects from the clew. To that end, the insertion means may comprise a gripping element for fixing the yarn section.
- According to the invention, in order to guarantee the correct functioning of the weaving device during operation and thus prevent failure, standstill or jamming of the weaving device and obtain an optimum weaving result, the packed clew has its own consistent shape.
- In a specific embodiment, in order to guarantee a correct insertion of the clewed weft yarn during operation of the weaving device, the weft yarn of the packed clew is provided-with a bonding agent, for example a glue or a wax. In another embodiment, ice is used as the bonding agent, more in particular “dry ice”.
- In another embodiment of the weaving device according to the invention, the packed clew can be moved through the shed by means of a carrier. The packed clew may be arranged round the carrier in one or more windings; in a specific embodiment, the carrier envelopes the packed clew at least partially. In the latter embodiment, the packed clew does not need to have a consistent shape, but the clew retains its shape as a result of the presence of the envelope.
- After being inserted, the clew unwinds during its movement through the shed. The moment the clew has unwound into an elongated weft yarn, the carrier envelope may be intercepted at the end of the shed and be discharged, for example for forming a new clew.
- In a specific embodiment, the carrier is made of a rigid material, for example a plastic, or of a flexible material, for example a foil. In both embodiments the clewed weft yarn is given a consistent external shape, which still has a certain inert mass, however.
- In a specific embodiment, the insertion means comprise an elongated tube, which tube is directed towards the shed with an open end thereof and which can be connected to means for supplying the medium under pressure at its other end. Said medium under pressure may be compressed air or water.
- In a specific embodiment of a clewed weft yarn, the weft yarn has a certain, limited length, having at least one end projecting from the clew. In another functional embodiment, several clewed weft yarns are interconnected via intermediate yarn sections, which clewed weft yarns can subsequently be inserted into the shed one after another by the insertion means. Said several clewed weft yarns may be formed of one yarn, which clewed weft yarns may be present on a winding element in one or more windings.
- The invention also relates to a weft yarn as described in the present application.
- The invention will now be explained in more detail with reference to a drawing, in which:
-
FIGS. 1 and 2 show a weaving device according to the prior art; -
FIGS. 3 a-3 e show various embodiments of a clewed weft yarn according to the invention; -
FIG. 4 shows an embodiment of the insertion means of a weaving device according to the invention; -
FIGS. 5 a-5 b show further aspects of the invention. - In
FIGS. 1 and 2 an embodiment of a known weaving device is shown, for example the device that is described in Dutch patent application No. 73/09850 or Dutch patent No. 1004173. - The known weaving device comprises a lay 1 and means 2 for forming a
shed 3 of warp yarns 4, which warp yarns 4 come from warp yarn supply bobbins 5. A large number ofdents 6, together forming the so-called “reed”, are arranged on the lay 1, which dents can move between the warp yarns 4. A number ofguides 7 are furthermore arranged on the lay 1 for guiding aprojectile 8 from one side to the other side. - As is shown in the figure, the
projectile 8 is present in aninsertion station 9 disposed on the left-hand side of theshed 3, whilst abraking station 10 is disposed at the other side of theshed 3. Aweft yarn 11 from asupply bobbin 12 can be connected to theprojectile 8 in a known manner. A considerable amount of impulse energy is imparted to theprojectile 8 by means of a medium under pressure, for example compressed air or water. As a result, theprojectile 8 undergoes an acceleration and is moved or “shot” through theshed 3 at a high velocity, carrying along theweft yarn 11. Theprojectile 8 is also called the shuttle, therefore. - The
projectile 8 that moves through theshed 3 at a high velocity must be decelerated on the other side of the shed 3 (on the right inFIG. 1 ). To that end, abraking station 10 is disposed directly beside the shed 33 whichstation 10 intercepts and decelerates the projectile as it leaves theshed 3. Likewise, theprojectile 8 can be moved (“shot”) from the right-hand side to the left-hand side of theshed 3 at a high velocity by an insertion station 93 (not shown) arranged analogously to theinsertion station 9, which is disposed on the right-hand side of theshed 3. - A
braking station 10′ (not shown) is furthermore disposed at the location of theinsertion station 9 for intercepting and decelerating aprojectile 8 moving from the right-hand side to the left-hand side of theshed 3. - The high inert mass of the
projectile 8 and the frequently considerable width L of theshed 3 require that theprojectile 8 be moved through theshed 3 at a relatively high velocity. The acceleration forces thus generated lead to undesirable peak tensions in theweft yarn 11 being carried along, which may cause the yarn to break. In addition to that, theprojectile 8 moving through the shed at a high velocity must be intercepted at the end of the shed and be decelerated by a separate braking station 10 (10′). Said deceleration, too, may lead to undesirable peak tensions in the weft yarn, especially in situations in which the weft yarn is used for decelerating the projectile. - In order to prevent in particular the undesirable peak tensions in the
weft yarn 11, a lower initial speed of theprojectile 8 being “shot” through theshed 3 is required, which also limits the maximum width of theshed 3, however. In the prior art it has already been proposed to embody theguides 7 that primarily function to guide the movement of theprojectile 8 through theshed 3 as medium blowers. Saidmedium blowers 7 are mounted on the lay 1 and are connected to amedium supply line 17. Eachguides 7 may be connected to a mainmedium supply line 19 via anelectromagnetic valve 18. - Each
guide 7 is provided with medium outflow openings (not shown inFIG. 1 ) oriented in the direction of transport of theprojectile 8. The medium outflow openings are directed towards an impact surface of theprojectile 8, so that the pressurised medium flowing out of the openings will impact on said impact surface and thus transmit the energy from the medium to theprojectile 8. Theauxiliary blowers 7 thus assist in the movement of theprojectile 8 through ashed 3, thus obviating the need for a high initial speed to be imparted to the projectile by theinsertion station 9. - This configuration of a known weaving device in any case leads to lower peak tensions in the
weft yarn 11. Thebraking stations 10 for decelerating theweft yarn 11 and the projectile 8 arriving from the shed are still necessary, costly components of the weaving device, so that the known weaving devices still exhibit a certain degree of complexity. -
FIGS. 3 a-3 d show specific embodiments of an important aspect of the weaving device according to the invention. - According to the invention, the
weft yarn 11 has been formed into aclew 20, which is preferably given a consistent shape by using a binding orbonding agent 22, for example. InFIG. 3 a, said binding orbonding agent 22 may be a glue. Also wax appears to be very suitable for giving the left yarn 11 a consistent shape, however. The bonding agent prevents theclew 20 from falling apart into a loose mass of yarn during its movement through theshed 3, which would inevitably lead to weaving faults and/or failure of the device. - By fixing the
clew 20 at ayarn section 21 projecting from theclew 20, theclew 20 is unwound or uncoiled into an elongated, fully uncoiledweft yarn 11 during its movement through theshed 3. According to the invention, eachclew 20, once it is fully uncoiled, thus has a length equal to the width L of theshed 3. See alsoFIG. 4 . -
FIGS. 3 b and 3 c show other embodiments of theweft yarn 11 formed into aclew 20, which is surrounded bycarriers FIGS. 3 b, thecarrier 23 is in the form of an encasing of a hard yet light plastic, which surrounds theclew 20. The sleeve is provided with anopening 23 a, which enables placement of theclew 23 into the encasing prior to insertion of the assembly into the shed on the one hand and unwinding of theclew 20 present in the encasing 23 on the other hand. - The moment the
clew 20 has fully unwound into anelongated weft yarn 11, thecarrier 23 will leave theshed 3 to be intercepted outside theshed 3, for example for reuse. -
FIG. 3 c shows a similar embodiment, in which the carrier is made of a flexible material, for example a foil. Analogously to the embodiment ofFIG. 3 b, theclew 20 does not have a consistent shape of itself in this embodiment, its shape being determined by thecarrier 24 that surrounds theclew 20. As a result, theclew 20 will have a certain inert mass, too, which makes it possible to move saidclew 20 through theshed 3 by means of a medium under pressure. - The
weft yarn 11 formed into aclew 20 unwinds from thefoil casing 24 at the location indicated at 24 a during its movement through theshed 3. At the end of theshed 3, theclew 20 has fully unwound into anelongated weft yarn 11, and the foil encasing is regarded as waste which, on account of its low weight, can easily be separated and be discharged, for example by being exhausted. - Another embodiment of the
weft yarn 11 formed into aclew 20 as shown inFIG. 3 a, which has its own consistent shape, uses ice, in particular dry ice, as the binding or bonding agent. Said embodiment may be realised, for example, by moisturising theclew 20 with water and subsequently freezing it. The ice particles will fragmentize at the location where theleft yarn 11 is pulled off aclew 20 during the movement through the shed. - It is also possible to compress the
clew 20, using carbon dioxide snow (dry ice), while it is being formed, so that a consistent shape can be obtained in this manner as well. In this case, too, the carbon dioxide ice will fragmentize upon insertion of theclew 20 into theshed 3. Said carbon dioxide ice will subsequently evaporate in theshed 3. - Yet another embodiment is shown in
FIG. 3 d, in which theweft yarn 11 is wound on acarrier 25 in one ormore windings 20 a-20 f, thus forming aclew 20. This carrier, too, has a low inert mass and can be moved or “shot” through theshed 3 by suitable insertion means. Theleft yarn 11 will unwind from thecarrier 25 during its movement through theshed 3. In this case, too, thecarrier 25 can be intercepted at the end of theshed 3 and be reused. - In all the above embodiments the
clew 20 is given a certain consistency of its own by the addition of means having a low inert mass. Said consistency makes it easier to handle the clew, for example position it in the insertion means. In addition it enables the insertion or “shooting” of the clew into the shed at great velocity by the insertion means, using a medium under pressure. - It is also possible, however, to wind the
weft yarn 11 into aclew 20 in a specific manner without making use of external, foreign auxiliary means (a bonding agent, an encasing or a carrier), which clew likewise has a consistent shape as a result of the winding method that is being used. This embodiment is shown inFIG. 3E . This embodiment, too, can be inserted into the shed at great velocity by the insertion means, using a medium under pressure. -
FIG. 4 shows an embodiment of the insertion means for use with a weaving device according to the invention. The insertion means, indicated at 9 inFIG. 1 , comprise anelongated cube 30 having anopen end 30 a, which is directed towards theshed 3. Theother end 30 b is provided with an opening that can be connected or coupled to means for supplying medium under pressure. - Present inside the
elongated tube 30, which in fact functions as a launching tube, is aweft yarn 11 formed into aclew 20 in accordance with any one of the embodiments as shown inFIGS. 2A-2D . Theyarn section 21 projecting from theclew 20 is fixed by the launchingtube 30 at the location indicated at 30 c. Theclew 20 is launched into theshed 3 from the tube as a result of the pressure buildup generated by feeding a certain amount of medium under pressure P to thespace 31 between thetube 30 and theclew 20 via theopening 30 b. By fixing theyarn section 21 in the launchingtube 30 at the location indicated at 30 c, the launchedclew 20 unwinds into a full-length,elongated weft yarn 11 in theshed 3. After having launched aclew 20, the insertion means 9 may be readied for inserting anext clew 20 into theshed 3. - Said repeated “loading” and “unloading” of the launching
tube 30 with anew clew 20, which, after being launched into theshed 3, unwinds into an elongatedleft yarn 11 having a length that is substantially equal to the width L of theshed 3, can be further automated, especially if thevarious clews 20 are interconnected by means ofintermediate yarn sections 21. - This embodiment is shown in
FIG. 5 a, which shows several clews 201-206, each comprising a packed weft yarn 111-116, which, in unwound form, has a length equal to or slightly smaller than the width L of theshed 3. See alsoFIG. 4 . Intermediate yarn sections 211-216 are to be fixed by the insertion means 9, this in order to enable unwinding of the clew 201-206 into an elongatedleft yarn 11 in theshed 3. - In a specific embodiment, the various clews 201-206 are formed of a
single yarn 26. -
FIG. 5 b shows yet another a specific embodiment of the insertion means 9, which, in addition to the launchingtube 30, also comprise a winding element 35, on which the various weft yarns 111-1110 formed into clews 201-2010 are arranged in one or more windings. Rotation of the winding element 35 causing the windings of the clews 201-2010 to be unwound in the direction of theopening 30 c of the launchingtube 30. Theopening 30 c can be opened temporarily and be closed again for passing aclew 202, with the intermediate yarn section 211-212 being fixed each time the tube is opened and closed again. - By supplying medium under pressure via the
opening 30 b, the clew is shot into theshed 3, causing it to unwind into an elongated weft yarn 112. - Although the invention has been explained herein on the basis of a packed clew being inserted into the shed by the insertion means, using a medium under pressure (compressed air or a water jet), this aspect of the insertion means must not be construed as being overly limitative. Also other variants of insertion means are possible, as long as said means in part a movement to the packed clew or the carrier by means of impulse transmission. Also such variants are considered to fall within the scope of the appended claims.
Claims (21)
1. A weaving device comprising means for forming a shed consisting of warp yarns, with insertion means being disposed on one side or on both sides of the shed for inserting a weft yarn into the shed, characterized in that the weft yarn has been formed into a packed clew, which packed clew unwinds into an elongated weft yarn upon insertion into the shed.
2. The weaving device according to claim 1 , characterized in that the insertion means fix the packed clew upon insertion into the shed at a yarn section that projects from the clew.
3. The weaving device according to claim 2 , characterized in that the insertion means comprise a gripping element for fixing the yarn section.
4. A The weaving device according to claim 1 , characterized in that the packed clew has its own consistent shape.
5. The weaving device according to claim 4 , characterized in that the weft yarn of the packed clew is provided with a bonding agent.
6. The weaving device according to claim 5 , characterized in that said bonding agent is a glue.
7. The weaving device according to claim 5 , characterized in that said bonding agent is a wax.
8. The weaving device according to claim 5 , characterized in that the said bonding agent is ice.
9. The weaving device according to claim 1 , characterized in that the packed clew can be moved through the shed by means of a carrier.
10. The weaving device according to claim 9 , characterized in that the packed clew is arranged round the carrier in one or more windings.
11. The weaving device according to claim 9 , characterized in that the carrier envelopes the packed clew at least partially.
12. The weaving device according to claim 11 , characterized in that the carrier is made of a rigid material, for example a plastic.
13. The weaving device according to claim 11 , characterized in that the carrier is made of a flexible material, for example a foil.
14. The weaving device according to claim 1 , characterized in that the insertion means comprise an alonagated tube, which tube is directed towards the shed with an open end thereof and which can be connected to means for supplying the medium under pressure at its other end.
15. The weaving device according to claim 14 , characterized in that said medium under pressure is air.
16. The weaving device according to claim 14 , characterized in that the said medium under pressure is water.
17. The weaving device according to claim 1 , characterized in that the weft yarn has a certain, limited length, having at least one end projecting from the clew.
18. The weaving device according to claim 1 , characterized in that the insertion means are arranged for inserting several clewed weft yarns interconnected via intermediate yarn sections one after another into the shed.
19. The weaving device according to claim 18 , characterized in that said several clewed weft yarns are formed of one yarn.
20. The weaving device according to claim 18 , characterized in that said several clewed weft yarns are present on a winding element in one or more windings.
21. The weft yarn for use in a weaving device comprising means for forming a shed consisting of warp yarns, with insertion means being disposed on one side or on both sides of the shed for inserting the weft yarn into the shed, as defined in according to claim 1.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1023943A NL1023943C2 (en) | 2003-07-17 | 2003-07-17 | Weaving device. |
NL1023943 | 2003-07-17 | ||
PCT/NL2004/000477 WO2005012610A1 (en) | 2003-07-17 | 2004-07-02 | Weaving device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070169831A1 true US20070169831A1 (en) | 2007-07-26 |
Family
ID=34114474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/564,767 Abandoned US20070169831A1 (en) | 2003-07-17 | 2004-07-02 | Weaving device |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070169831A1 (en) |
EP (1) | EP1646744A1 (en) |
JP (1) | JP2007521417A (en) |
CN (1) | CN1836064A (en) |
NL (1) | NL1023943C2 (en) |
WO (1) | WO2005012610A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090165885A1 (en) * | 2005-12-20 | 2009-07-02 | Patrick Puissant | Method for Insertion of a Weft Thread on a Weaving Loom, and a Weaving Loom |
WO2016205816A1 (en) | 2015-06-18 | 2016-12-22 | Kevin Kremeyer | Directed energy deposition to facilitate high speed applications |
KR20180030474A (en) * | 2015-06-18 | 2018-03-23 | 케빈 크리마이어 | Directional energy deposition to promote high-speed applications |
US20190003086A1 (en) * | 2015-06-18 | 2019-01-03 | Kevin Kremeyer | Directed Energy Deposition to Facilitate High Speed Applications |
US10605279B2 (en) | 2007-08-20 | 2020-03-31 | Kevin Kremeyer | Energy-deposition systems, equipment and methods for modifying and controlling shock waves and supersonic flow |
Families Citing this family (6)
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NL1026238C2 (en) * | 2004-05-19 | 2005-11-22 | Te Strake Textile B V | Carrier for introducing a weft thread into the weft compartment of a weaving device. |
NL1027372C2 (en) * | 2004-10-29 | 2006-05-03 | Te Strake Textile B V | Weaving device. |
NL1031481C2 (en) * | 2006-03-31 | 2007-10-03 | Te Strake Textile B V | Weaving device. |
JP6190285B2 (en) * | 2014-02-13 | 2017-08-30 | 株式会社豊田自動織機 | Weft inserting method and weft flying promotion body mounting apparatus in air jet loom |
CN106757690A (en) * | 2017-01-15 | 2017-05-31 | 苏州大学 | One kind is without shuttle Weft insertion method |
CN117188021B (en) * | 2023-11-07 | 2024-03-22 | 江苏维凯科技股份有限公司 | Aramid fiber base cloth double-warp double-weft weaving device for radome |
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US10605279B2 (en) | 2007-08-20 | 2020-03-31 | Kevin Kremeyer | Energy-deposition systems, equipment and methods for modifying and controlling shock waves and supersonic flow |
WO2016205816A1 (en) | 2015-06-18 | 2016-12-22 | Kevin Kremeyer | Directed energy deposition to facilitate high speed applications |
KR20180030474A (en) * | 2015-06-18 | 2018-03-23 | 케빈 크리마이어 | Directional energy deposition to promote high-speed applications |
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US20190003086A1 (en) * | 2015-06-18 | 2019-01-03 | Kevin Kremeyer | Directed Energy Deposition to Facilitate High Speed Applications |
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Also Published As
Publication number | Publication date |
---|---|
WO2005012610A1 (en) | 2005-02-10 |
CN1836064A (en) | 2006-09-20 |
JP2007521417A (en) | 2007-08-02 |
NL1023943C2 (en) | 2005-01-18 |
EP1646744A1 (en) | 2006-04-19 |
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Legal Events
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Owner name: TE STRAKE TEXTILE B.V., NETHERLANDS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GORRIS, JOANNES JOSEPHUS HENRICUS MARIE;HIEMSTRA, HENDRIK;PUISSANT, PATRICK;REEL/FRAME:018113/0381 Effective date: 20060330 |
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STCB | Information on status: application discontinuation |
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