WO1995008668A1 - Yarn positioning apparatus - Google Patents
Yarn positioning apparatus Download PDFInfo
- Publication number
- WO1995008668A1 WO1995008668A1 PCT/US1994/010025 US9410025W WO9508668A1 WO 1995008668 A1 WO1995008668 A1 WO 1995008668A1 US 9410025 W US9410025 W US 9410025W WO 9508668 A1 WO9508668 A1 WO 9508668A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- threads
- orientation
- thread
- fringe
- auxiliary
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
- D03D41/008—Looms for weaving flat yarns
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/0027—Screen-cloths
- D21F1/0054—Seams thereof
Definitions
- the present invention relates to an apparatus for positioning yarns. More particularly, the present invention relates to an apparatus for separating and gripping yarns from a fringe and positioning them for further processing. Most particularly, the present invention relates to an apparatus for separating previously woven yarns from a fringe and presenting them to an interlacer in an automated seaming machine which produces a woven join in industrial or papermaking fabrics.
- U.S. Patent Nos. 4,581,794 and 5,027,483 which are commonly assigned with the present invention to Asten Group, Inc., provide an apparatus for forming a woven join or seam between opposite ends of a woven fabric and an apparatus for selectively releasing yarns from a fringe which is utilized in conjunction with the seaming apparatus.
- Automated seaming machinery utilizing the technology disclosed in these patents has performed satisfactorily. However, some areas of automated join formation still present problems.
- the present invention provides a yarn positioning apparatus for use in an automated seaming machine.
- the yarn positioning apparatus is comprised of a means for gripping a previously woven yarn from a fabric fringe in a first orientation and repositioning it to a second orientation.
- the yarn is retained in its second orientation as it is translated for further processing.
- This device can be used to control the orientation of yarns being woven into a join.
- the invention also provides a method for forming a join in a length of the woven fabric, comprised of interwoven machine direction and cross machine direction threads, to form an endless woven fabric belt.
- the following items are first provided; (1) an auxiliary strip of threads and a means for supporting them in parallel relation to the cross machine direction threads in the woven fabric; (2) a means for forming a shed opening in the auxiliary strip; (3) a means for supporting a fringe of machine direction threads on the opposite ends of the fabric on opposite sides of the auxiliary threads and for successively releasing and MD threads from the fringe; (4) means for gripping a successive MD thread in its original woven orientation, then twisting the gripped MD thread to a second orientation, and translating the gripped MD thread to the shed opening while retaining it in the second orientation; and (5) a means for gripping and pulling the successive MD thread through the shed opening to form the seam.
- a successive MD thread is released from the fringe and gripped in its woven orientation by the gripping, twisting and translating means.
- the successive MD thread is then twisted to a second orientation.
- the means for forming a shed opening forms the shed opening in the auxiliary strip of threads, and the successive MD thread is then translated to the shed opening.
- the MD thread is then gripped by the means for pulling the thread through the shed opening before being released by the gripping, twisting and translating means.
- the successive MD thread is then pulled through the shed opening so that it is interwoven with the auxiliary strip in its original woven fabric orientation.
- Figure 1 is a perspective illustration of a seaming machine join area including a yarn gripper-transfer arm in accordance with the present invention.
- Figure 2 is a perspective illustration similar to Figure 1, showing a gripper-transfer arm after it separated a thread from the fringe.
- Figure 3 shows the gripper-transfer arm transferring the separated MD thread to an interlacing arm.
- Figure 4 shows the interlacing arm pulling the selected thread through the shed opening.
- Figure 5 is an enlarged perspective view of the gripper- transfer arm addressing a thread in the join area.
- Figure 6 shows the gripper-transfer arm of Figure 5 twisting the captured thread.
- Figure 7 shows the gripper-transfer arm transferring the thread from the fringe position to the shed opening.
- Figure 8 shows the thread being released from the gripper- transfer arm and pulled through the shed opening.
- Figure 9 is a side view of the gripper-transfer arm.
- Figure 10 is a view along 10-10 in Figure 9.
- Figure 11 is a view along 11-11 in Figure 9.
- Figure 12 is a perspective view of an alternate embodiment of the gripper.
- Figure 13 is a view along 13-13 in Figure 12.
- MD machine direction
- CMD cross-machine direction
- Figure 1 shows a seaming machine 1 for forming a join 10 between the opposite ends 12 and 14 of a length of woven fabric.
- a strip of auxiliary threads 16, parallel to the CMD threads, is supported between the ends of the woven fabric.
- the opposite ends 12 and 14 of the woven fabric each include a fringe 20 formed by removing a majority of the CMD threads from the MD threads.
- a narrow ribbon of CMD fringe threads 22 is left at the edge of the fringe 20 to maintain the MD threads 24 in their proper alignment and orientation with respect to the woven fabric.
- Each ribbon of CMD fringe threads 22 is supported by suitable means, not shown, such that the MD threads 24 forming the fringe 20 are generally normal to the auxiliary strip 16.
- Means for forming a shed opening 33 in the ribbon of CMD fringe threads 22 are attached to the ribbon 22.
- a suitable shed forming device is described in U.S. Patent No. 5,027,483, which is incorporated herein as if fully set forth. This will all be known to those skilled in the art.
- Gripper-transfer arm assemblies 50 and 51 in accordance with the present invention are positioned to rotate between each respective fringe 20 and the strip of auxiliary CMD threads 16.
- Interlacing arms 40 of the type disclosed in 4,581,794, are positioned below the fabric ends 12 and 14. The interlacing arms 40 move across the width of the strip of auxiliary CMD threads 16.
- the gripper-transfer arm assemblies 50 and 51, and their use in the seaming apparatus 1 provide a preferred embodiment of the present invention.
- a general description of the structure and function of the gripper-transfer arm assemblies 50 and 51 will be given with respect to the left-hand arm assembly 50.
- a detailed description of the arm assembly 50 and its operation will follow.
- FIGs 1-4 illustrate the sequential actions of the left hand gripper-transfer arm assembly 50 as it removes an MD thread 24 from the fringe 20 and presents it to an interlacing arm 40 for interweaving with the auxiliary threads 16.
- the gripper- transfer arm assembly 50 is shown in the gripping position in Figure 1.
- the assembly 50 is comprised of a twin-gripper assembly 70 which is connected to a base 56 by an arm 54.
- the twin-gripper assembly 70 includes a fixed housing 72 and a pivoting twin-gripper body 75. In the initial gripping position, the twin-gripper body 75 is pivoted away from the fixed housing 72 to a position generally normal to the fringe 20.
- the twin- gripper 75 has upper and lower gripper assemblies 80 and 81 which both grip the first successive MD thread 24 as shedding means 33 release the MD thread 24 from the fringe 20. After gripping the MD thread 24, the pivoting twin-gripper body 75 pivots to the transfer position, adjacent to the fixed housing 72, in a plane parallel to the fringe 20, as shown in Figure 2. The captured MD thread 24 is positively retained by the upper and lower gripper assemblies 80 and 81 as the twin-gripper 75 pivots to the transfer position.
- a rotary drive system 60 is attached to the base 56 of the gripper-transfer arm assembly 50.
- the rotary drive 60 which is mounted at a fixed position above the join area on the seaming apparatus 1, rotates the gripper-transfer arm assembly 50 from the position shown in Figure 2, parallel to the MD threads 24 in the fringe 20, to the interlacing position shown in Figure 3. This carries the MD thread 24 to the plane of the shed opening in the auxiliary threads 16.
- the drive system 60 can be made by conventional means known to those skilled in the art.
- the interlacing arm 40 extends through the shed opening 36 in the strip of auxiliary threads 16 from the opposite side of the auxiliary strip 16 from the gripper-transfer arm 50.
- the gripping means 41 on the free end of the interlacing arm 40 grips the MD thread 24 while it remains captured by the upper and lower grippers 80 and 81 on the twin-gripper body 75.
- the MD thread 24 is then released by the upper and lower gripper assemblies 80 and 81 on the gripper- transfer arm 50, and pulled through the shed opening 36 by the interlacing arm 40.
- the gripper-transfer arm 50 then rotates back to the position shown in Figure 4 as the sequence is repeated by the opposite gripper-transfer arm 51 acting on the opposite fringe 20 of the woven fabric 14.
- the seam or join 10 is formed.
- Figures 5-8 a sequential series of enlarged perspective views of the seam area are shown. These sequential view illustrate the movement of the MD thread 24, shown with a rectangular cross-section for clarity, as it is manipulated from the fringe 20 by the gripper-transfer arm assembly 50 to the seam 10.
- Figures 5, 6, 7 and 8 are coordinated with Figures 1, 2, 3 and 4, respectively.
- the fringe portion of the fabric 12 is shown.
- the fringe portion MD threads 24 are retained in their original woven fabric orientation.
- the twin- gripper body 75 is shown in the initial, gripping position, pivoted out from the fixed housing 72, and generally normal to the fringe 20.
- the MD thread 24 is gripped in two positions and retained by upper and lower gripper assemblies 80 and 81 on the twin-gripper body 75.
- the twin-gripper body 75 pivots toward housing 72 to the transfer position, parallel to the fringe 20, twisting the captured MD thread 24 to the second orientation as shown in Figure 6.
- the captured MD thread 24 is translated by the gripper- transfer arm 50 to the interlacing position in the plane of the auxiliary CMD thread 16 next to the shed opening 36, as shown in Figure 7.
- the combination of positively retaining and translating the MD thread 24 reorients the thread 24 so that it is poised to return to its original woven fabric orientation as it is drawn through the shed 36.
- the MD thread 24 is gripped by a gripper 41 on interlacing arm 40 between the upper and lower gripper assemblies 80 and 81 on the twin-gripper 75. It will be appreciated by those skilled in the art that the prior step of gripping the MD thread 24 between the upper and lower gripper assemblies 80 and 81 is instrumental in maintaining the MD thread 24 in its proper orientation as it is gripped by the interlacing arm 41. After being gripped by the interlacing arm 40, the MD thread 24 is released by both the upper and lower gripper assemblies 80 and 81. The interlacing arm 40 then pulls the MD thread 24 through the shed opening 36, as shown in Figure 8. Utilizing the twin- gripper transfer arm assembly 50 in this manner insures that the MD thread is returned to its original woven fabric orientation as it is woven into the join 10.
- gripper-transfer arm assembly 50 its structure will be described in more detail. While only the left hand gripper-transfer arm assembly 50 will be described, it will be recognized by those skilled in the art that the right hand gripper-transfer arm assembly 51 is an equivalent opposite-hand assembly.
- FIGS 9-11 provide detailed views of the gripper- transfer arm assembly 50.
- the gripper-transfer arm 50 is comprised of a twin-gripper assembly 70 which is attached to the base 56 by the arm 54, as previously described.
- the base has a keyed aperture 58 which is secured to a shaft from the drive system 60 (not shown) .
- the pivoting gripper body 75 is mounted between a set of flat, parallel supports 73 and 74, shown more clearly in Figure 5, which extend from the housing 72.
- the gripper assemblies 80 and 81 which make up the pivoting twin-gripper body 75, are constructed from tubes 82, having square cross-sections, which are attached to and spaced apart by a cross-support 85. Each tube 82 is parallel and in close proximity to a respective support 73 and 74 on housing 72.
- Tapered end pieces 108 are installed in the open ends of each tube 82.
- the ends of tubes 82 are configured to provide a smooth transition between each end piece 108 and the tube body.
- the tapered ends are required to insure that the twin-gripper body 75 can pass between the fringe 20 and the strip of auxiliary threads 16 to a position next to the shed opening 36 without catching or snagging the fringe 20 or CMD threads in the auxiliary strip 16.
- Apertures 78 extend along a common center line through the ends of supports 73 and 74, the upper and lower tubes 82, and the respective end pieces 108. Pins 76 are disposed in the apertures 78 and extend through each support 73 or 74 and the respective upper or lower tube 82, forming the pivotal attachment between the twin-gripper body 75 and the fixed housing 72.
- Upper and lower pistons 91 and 92 connected by cross member 95, are fitted into the bores 88 of the upper and lower tubes 82.
- the cross member 95 extends through opposing longitudinal slots 83 in the tubes 82.
- Springs 90 are installed in the upper and lower tubes 82 behind the pistons 91 and 92 to keep the pistons in the closed, rest position.
- Actuator support 112 connects the free ends of the upper and lower tubes 82 and closes off the open tube ends after each pistons 91 and 92 and springs 90 have been installed.
- Air cylinder actuator 86 is slidably mounted through an aperture 113 in the support 112 and the stationary portion is attached to cross-support 85. The moveable portion of the actuator 86 is attached to cross-member 95.
- Aligned cross slots 87 in the tubes 82 expose the grippers 93, affixed to the front of each piston 91 and 92.
- Grippers 93 are attached to the front of each piston 91 and 92.
- the grippers 93 can be replaced with grippers having different configurations depending on the thread configuration. In order to grip a flat thread, as shown in Figure 11, the gripper 93 has a square end. This ensures that the thread is gripped and retained in its original woven fabric orientation.
- slots 77 in the supports 73 and 74 are aligned with the slots 87 in the tubes 82, and provide clearance for the captured MD thread 24 as the pivoting twin- gripper body 75 swings from the initial, gripping position to the transfer position, as previously described.
- a pivot post 115 is affixed to the lower gripper assembly 81 on the pivoting gripper body 75.
- a second air cylinder actuator 96 is attached by an arm 98 to the pivot post 115. The opposite end is attached to a support 102 on the fixed housing 72.
- the support 102 is pivotally attached to fixed housing 72 by a pin 106 extending through an aperture 104 in the housing 72 and the support 102.
- the second air cylinder 96 swings the pivoting gripper body 75 about the pins 76 between the gripping and transfer positions.
- the slots 87 on the twin-gripper assemblies 80 and 81 approach the first MD thread 24 as the pivoting gripper body 75 is moved by actuator 96 to the initial, gripping position.
- the grippers 93 on pistons 91 and 92 are retracted by actuator 86 acting on cross member 95.
- the springs 90 are compressed.
- the actuator 86 is disengaged.
- the stored energy in the springs 90 return the grippers 93 to the closed, gripping position.
- Each gripper 93 secures the MD thread 24, retaining it in its original orientation.
- the actuator 96 then retracts the pivoting twin- gripper body 75 to the transfer position, nested between the supports 73 and 74 of the housing 72. This movement pulls the captured MD thread 24 from the fringe 20 and twists it to a second orientation as previously described and illustrated in Figures 5 and 6.
- the gripper 41 on the interlacing arm 40 grips the MD thread 24 between the upper and lower gripper assemblies 80 and 81.
- the actuator 86 then retracts pistons 91 and 92, releasing the MD thread 24 from the grippers 93.
- an alternate embodiment of the gripper 120 is shown affixed to the front of each piston 91 and 92.
- This embodiment can be used for round cross section yarns which are crimped or deformed, as illustrated in Figure 12.
- the gripper 120 is formed from flat spring steel and is sized for close conforming fit with the bore 88 of each tube 82.
- the opening 122 formed between arms 117 lies in the same direction as the stroke of pistons 91 and 92, allowing the gripper to secure deformed round yarns as shown.
- One side 118 on the gripper 120 closes off each slot 87 when the grippers are in the closed, rest position.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Looms (AREA)
- Eye Examination Apparatus (AREA)
- Sewing Machines And Sewing (AREA)
- Vehicle Body Suspensions (AREA)
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7509790A JP2765758B2 (en) | 1993-09-21 | 1994-09-08 | Device for orienting yarn |
AU78311/94A AU679790C (en) | 1993-09-21 | 1994-09-08 | Yarn positioning apparatus |
EP94929142A EP0720677B1 (en) | 1993-09-21 | 1994-09-08 | Yarn positioning apparatus |
DE69411277T DE69411277T2 (en) | 1993-09-21 | 1994-09-08 | DEVICE FOR POSITIONING THREADS |
NO960881A NO960881L (en) | 1993-09-21 | 1996-03-05 | Yarn Positioner |
FI961281A FI961281A (en) | 1993-09-21 | 1996-03-20 | Wire Positioning Device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/124,921 | 1993-09-21 | ||
US08/124,921 US5390708A (en) | 1993-09-21 | 1993-09-21 | Apparatus for translating yarns in the proper position and orientation for forming a woven join |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995008668A1 true WO1995008668A1 (en) | 1995-03-30 |
Family
ID=22417432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1994/010025 WO1995008668A1 (en) | 1993-09-21 | 1994-09-08 | Yarn positioning apparatus |
Country Status (10)
Country | Link |
---|---|
US (1) | US5390708A (en) |
EP (1) | EP0720677B1 (en) |
JP (1) | JP2765758B2 (en) |
AT (1) | ATE167714T1 (en) |
CA (1) | CA2115789C (en) |
DE (1) | DE69411277T2 (en) |
FI (1) | FI961281A (en) |
NO (1) | NO960881L (en) |
NZ (1) | NZ274316A (en) |
WO (1) | WO1995008668A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19505280C2 (en) * | 1995-02-16 | 1998-08-06 | Staeubli Gmbh | Method and device for the mechanical production of a seam for making a web of fabric endless |
US5738151A (en) * | 1996-08-13 | 1998-04-14 | Asten, Inc. | Seam loop formation device and method of operation |
US6014797A (en) * | 1997-06-16 | 2000-01-18 | Jwi Ltd. | Method and apparatus for unravelling threads |
US6016851A (en) * | 1998-10-16 | 2000-01-25 | Wis Seaming Equipment, Inc. | Method and apparatus for providing the warp thread end of a fabric ribbon |
DE20105091U1 (en) * | 2001-03-23 | 2002-09-05 | Wangner Finckh GmbH & Co. KG, 72760 Reutlingen | Collet for seam weaving machines |
US7168456B1 (en) * | 2005-10-26 | 2007-01-30 | North Rocky Robot Technology, Inc. (Nortec) | Method and apparatus to remove yarns from the fringes of an industrial textile |
AT503434B1 (en) * | 2006-06-29 | 2007-10-15 | Wis Engineering Gmbh & Co Kg | Apparatus for removing weft threads from fabric edge, to allow formation of endless belt with woven seam, comprises catching device for stripping weft threads and stripped thread take-off device |
DE102010031804A1 (en) * | 2010-07-20 | 2012-01-26 | Mahle International Gmbh | Hydraulic filter element and associated manufacturing method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0043441A1 (en) * | 1980-07-09 | 1982-01-13 | Hermann Wangner GmbH & Co. KG | Process and apparatus for making a woven seam between two ends of a fabric |
WO1984000782A1 (en) * | 1982-08-20 | 1984-03-01 | Scapa Porritt Ltd | Automatic seaming machine |
US4581794A (en) * | 1984-03-07 | 1986-04-15 | Asten Group Inc. | Automatic seaming machine for fabric belts |
US5027483A (en) * | 1990-01-31 | 1991-07-02 | Asten Group, Inc. | Apparatus for selectively releasing yarns from a fringe |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3446941A1 (en) * | 1984-12-21 | 1986-07-03 | F. Oberdorfer, 7920 Heidenheim | METHOD FOR THE PRODUCTION OF A STITCH SEAM TO ENDLESS A TEXTILE TAPE AND SEWING MACHINE |
CS275271B2 (en) * | 1988-09-01 | 1992-02-19 | Tovarny Textilnich Potreb Elit | Device for choked and beaten-up weft removal on looms |
CZ278292B6 (en) * | 1989-06-27 | 1993-11-17 | Tovarny Textilnich Potreb | Apparatus for catching and pulling out of a mispick on weaving machines |
EP0458736A1 (en) * | 1990-05-21 | 1991-11-27 | Gebrüder Sulzer Aktiengesellschaft | Weft breakage repair in dummy shuttle looms |
JPH0515838A (en) * | 1991-06-27 | 1993-01-26 | Matsushita Electric Works Ltd | Building plate and multicolor coating method |
-
1993
- 1993-09-21 US US08/124,921 patent/US5390708A/en not_active Expired - Fee Related
-
1994
- 1994-02-16 CA CA002115789A patent/CA2115789C/en not_active Expired - Fee Related
- 1994-09-08 WO PCT/US1994/010025 patent/WO1995008668A1/en active IP Right Grant
- 1994-09-08 EP EP94929142A patent/EP0720677B1/en not_active Expired - Lifetime
- 1994-09-08 NZ NZ274316A patent/NZ274316A/en unknown
- 1994-09-08 AT AT94929142T patent/ATE167714T1/en not_active IP Right Cessation
- 1994-09-08 DE DE69411277T patent/DE69411277T2/en not_active Expired - Fee Related
- 1994-09-08 JP JP7509790A patent/JP2765758B2/en not_active Expired - Lifetime
-
1996
- 1996-03-05 NO NO960881A patent/NO960881L/en unknown
- 1996-03-20 FI FI961281A patent/FI961281A/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0043441A1 (en) * | 1980-07-09 | 1982-01-13 | Hermann Wangner GmbH & Co. KG | Process and apparatus for making a woven seam between two ends of a fabric |
WO1984000782A1 (en) * | 1982-08-20 | 1984-03-01 | Scapa Porritt Ltd | Automatic seaming machine |
US4581794A (en) * | 1984-03-07 | 1986-04-15 | Asten Group Inc. | Automatic seaming machine for fabric belts |
US4581794B1 (en) * | 1984-03-07 | 1989-01-03 | ||
US5027483A (en) * | 1990-01-31 | 1991-07-02 | Asten Group, Inc. | Apparatus for selectively releasing yarns from a fringe |
Also Published As
Publication number | Publication date |
---|---|
EP0720677B1 (en) | 1998-06-24 |
FI961281A0 (en) | 1996-03-20 |
JPH09503254A (en) | 1997-03-31 |
AU7831194A (en) | 1995-04-10 |
EP0720677A1 (en) | 1996-07-10 |
US5390708A (en) | 1995-02-21 |
AU679790B2 (en) | 1997-07-10 |
NO960881D0 (en) | 1996-03-05 |
ATE167714T1 (en) | 1998-07-15 |
CA2115789A1 (en) | 1995-03-22 |
CA2115789C (en) | 1999-02-09 |
DE69411277D1 (en) | 1998-07-30 |
DE69411277T2 (en) | 1998-11-05 |
JP2765758B2 (en) | 1998-06-18 |
FI961281A (en) | 1996-04-24 |
NZ274316A (en) | 1996-12-20 |
NO960881L (en) | 1996-05-15 |
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