EP0393468A1 - Schussfadenabsaugvorrichtung für Luftwebmaschinen - Google Patents
Schussfadenabsaugvorrichtung für Luftwebmaschinen Download PDFInfo
- Publication number
- EP0393468A1 EP0393468A1 EP90106797A EP90106797A EP0393468A1 EP 0393468 A1 EP0393468 A1 EP 0393468A1 EP 90106797 A EP90106797 A EP 90106797A EP 90106797 A EP90106797 A EP 90106797A EP 0393468 A1 EP0393468 A1 EP 0393468A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weft yarn
- suction device
- reed
- lamina
- shutting
- 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.)
- Withdrawn
Links
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 20
- 238000010009 beating Methods 0.000 claims abstract description 8
- 238000013459 approach Methods 0.000 claims abstract description 4
- 230000000875 corresponding effect Effects 0.000 claims 2
- 238000009941 weaving Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- D03D47/28—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
- D03D47/30—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 by gas jet
- D03D47/3066—Control or handling of the weft at or after arrival
- D03D47/308—Stretching or holding the weft
Definitions
- the technique of shuttleless looms is known to include the so-called air looms, wherein the weft yarn is drawn into the warp shed by a controlled air stream.
- Said air stream is produced by a main blow nozzle - through which the weft yarn is fed - and is maintained and controlled by a plurality of secondary nozzles, each of which produces a so-called secondary jet in order to keep a regular air stream allowing to draw the weft yarn from one end of the loom - where the main blow nozzle is positioned - to the opposite end thereof, where a suction device is normally provided to draw and retain the weft yarn by depression.
- the object of the present invention is to provide a suction device with improved performances as compared to prior art devices. This result is essentially obtained due to the fact that said device comprises a movable shutting lamina, apt to progressively close the suction mouth as the reed approaches the beating up position.
- the suction mouth is formed as an arched slit, extending along a width substantially corresponding to the width of the stroke of the sley, and the shutting lamina is associated to the reed moving with the sley.
- the loom comprises - in known manner - a sley 1 and a reed 2 moving from position A (backward waiting position of figs. 1 and 2) to the beating up position B.
- position A backward waiting position of figs. 1 and 2
- the warp shed is open to allow the passage of the weft yarn.
- the weft yarn is drawn through the warp shed simply thanks to the action of a controlled air stream. Said air stream is blown by the main nozzle 3, is maintained through the shed by secondary nozzles (not shown), and reaches the mouth 4 of the suction device.
- the weft yarn follows the same path, in the sense that it is launched through said nozzle 3, it is guided by the air stream along the shed, and it is sucked into the mouth 4.
- the suction mouth 4 is formed as an elongated slit, shaped as a circle arc, which practically covers an area corresponding to the whole oscillation path of the channel 2a of the reed 2. Furthermore, always according to the main object of the present invention, a movable lamina 5 is associated to the oscillating reed 2 for the purpose of progressively shutting the suction mouth 4.
- the lamina 5 is fixed just behind the reed channel 2a - in respect of the reed moving direction F during beating up - and it has a dimension such as to be apt to fully cover the suction mouth 4.
- the shutting lamina 5 leaves the suction mouth 4 totally free in correspondence of the reed position A (fig. 4), that is, the reed waiting position, with open shed.
- the lamina 5 moves in turn and progressively reduces the opening of the mouth 4 (fig. 5), up to full shutting thereof (fig. 6) at the end of the stroke.
- This mechanism works as follows: with the reed 2 in a waiting position A, the weft yarn emerges from the nozzle 3, is drawn through the warp shed and reaches the mouth 4. The weft yarn is kept taut between the nozzle 3 and the mouth 4 thanks to the air stream in between them. At this point, the reed beating up movement starts, during which the mouth 4 is progressively shut by the lamina 5. As a result of the reduction in the section of the mouth 4, while the flow rate of the air stream keeps constant, its speed increases. The pulling action on the weft yarn is thereby also increased, whereby the yarn is more and more taut until weaving thereof.
- a first great advantage of the device according to the present invention thus derives from the fact that it ensures a perfect tensioning of the weft yarn just at the critical moment of the weaving step.
- a second advantage concerns instead the fact that, by increasing the speed of the air stream just when the shed closes and the reed approaches the beating up poSition, said air stream is apt to remove any waste or filaments which may be present at the bottom of the reed channel, as well as any dust produced during weaving; this allows to keep the loom members cleaner, especially sensors and photoelectric cells, and to make the weaving environment less dusty.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2095189U IT216529Z2 (it) | 1989-04-21 | 1989-04-21 | Dispositivo aspiratore del filo di trama per telaio di tessitura ad aria. |
IT2095189U | 1989-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0393468A1 true EP0393468A1 (de) | 1990-10-24 |
Family
ID=11174525
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90106797A Withdrawn EP0393468A1 (de) | 1989-04-21 | 1990-04-09 | Schussfadenabsaugvorrichtung für Luftwebmaschinen |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0393468A1 (de) |
IT (1) | IT216529Z2 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5226458A (en) * | 1991-01-04 | 1993-07-13 | Picanol N.V., Naamloze Venootschap | Device for the stretching of a weft thread in weaving machines |
EP0567943A1 (de) * | 1992-04-25 | 1993-11-03 | Lindauer Dornier Gesellschaft M.B.H | Einrichtung zum pneumatischen Führen turbulenter Schussfadenenden einer Hilfsgewebeleiste in Luftdüsenwebmaschinen |
WO1998045517A1 (de) * | 1997-04-09 | 1998-10-15 | Textilma Ag | Webmaschine mit pneumatischer schussfadeneintragung |
WO2018099662A1 (en) * | 2016-11-29 | 2018-06-07 | Picanol | Waste end stretching device for a weaving machine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2081753A (en) * | 1980-08-11 | 1982-02-24 | Rueti Te Strake Bv | Weft tensioning in jet looms |
WO1983002466A1 (en) * | 1982-01-16 | 1983-07-21 | Griffith, John, Dalton | Yarn holding device |
EP0310804A2 (de) * | 1987-09-11 | 1989-04-12 | Picanol N.V. | Verfahren zum Entfernen eines fehlerhaft eingebrachten Schussfadens an einer Luftwebmaschine |
-
1989
- 1989-04-21 IT IT2095189U patent/IT216529Z2/it active
-
1990
- 1990-04-09 EP EP90106797A patent/EP0393468A1/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2081753A (en) * | 1980-08-11 | 1982-02-24 | Rueti Te Strake Bv | Weft tensioning in jet looms |
WO1983002466A1 (en) * | 1982-01-16 | 1983-07-21 | Griffith, John, Dalton | Yarn holding device |
EP0310804A2 (de) * | 1987-09-11 | 1989-04-12 | Picanol N.V. | Verfahren zum Entfernen eines fehlerhaft eingebrachten Schussfadens an einer Luftwebmaschine |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5226458A (en) * | 1991-01-04 | 1993-07-13 | Picanol N.V., Naamloze Venootschap | Device for the stretching of a weft thread in weaving machines |
EP0567943A1 (de) * | 1992-04-25 | 1993-11-03 | Lindauer Dornier Gesellschaft M.B.H | Einrichtung zum pneumatischen Führen turbulenter Schussfadenenden einer Hilfsgewebeleiste in Luftdüsenwebmaschinen |
WO1998045517A1 (de) * | 1997-04-09 | 1998-10-15 | Textilma Ag | Webmaschine mit pneumatischer schussfadeneintragung |
US6223779B1 (en) | 1997-04-09 | 2001-05-01 | Textilma Ag | Auxiliary selvage forming and weft thread cutting device |
WO2018099662A1 (en) * | 2016-11-29 | 2018-06-07 | Picanol | Waste end stretching device for a weaving machine |
BE1024755B1 (nl) * | 2016-11-29 | 2018-06-27 | Picanol Nv | Afvaleinde-strekinrichting voor een weefmachine |
CN109983166A (zh) * | 2016-11-29 | 2019-07-05 | 必佳乐公司 | 用于织机的废料端拉伸装置 |
Also Published As
Publication number | Publication date |
---|---|
IT8920951V0 (it) | 1989-04-21 |
IT216529Z2 (it) | 1991-09-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE ES FR GB GR LI LU NL |
|
17P | Request for examination filed |
Effective date: 19910410 |
|
17Q | First examination report despatched |
Effective date: 19921016 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19930609 |