GB2300650A - Four-position jacquard machine - Google Patents
Four-position jacquard machine Download PDFInfo
- Publication number
- GB2300650A GB2300650A GB9609658A GB9609658A GB2300650A GB 2300650 A GB2300650 A GB 2300650A GB 9609658 A GB9609658 A GB 9609658A GB 9609658 A GB9609658 A GB 9609658A GB 2300650 A GB2300650 A GB 2300650A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lifter
- jacquard machine
- height
- roller
- litter
- 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
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C3/00—Jacquards
- D03C3/12—Multiple-shed jacquards, i.e. jacquards which move warp threads to several different heights, e.g. for weaving pile fabrics
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C3/00—Jacquards
- D03C3/06—Double-lift jacquards
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Description
Four-position Jacquard machine, 2300650 The present invention relates to a
four-position jacquard machine, c=Wrising a lifter device with a first and a second lif ter element, and a f Irst reversing roller which In provided at a fixed height and is In interaction with a f Irst lifter cord f or lif ting one or more warp threads, and a device for taking each lif ter element optionally in each case to one of two different heights in successive working cycles.
The production of a fabric from warp threads and weft threads in carried out on a weaving loom by forming a shed in each case between a series of warp threads.in successive cycles, and in each case inserting one or more weft threads into said shed.
For the formation of the successive sheds, the position of each warp thread relative to the height (a) at which the wef t thread or wef t threads will be inserted must in each case be determined according to the desired weave between weft threads and warp threads.
It is generally known to use a Jacquard machine for forming these successive sheds.
In a method for producing a fabric in the case of which weft threads have to be inserted at three different heights, for example making use of a three-gripper weaving loom, the Jacquard machine must be capable of taking the warp threads to four different heights, namely: below the lowest weft insertion height, between the lowest and the middle weft insertion height, between the middle and the top weft insertion height, and above the top weft Insertion height. Such Jacquard machines are called four-position Jacquard machines.
Belgian Patent No. 529019 discloses a fourposition jacquard machine which has the features men- tioned in the first paragraph of this description. Each lifter element has a top and a bottom lifter roller and is suspended with the top lifter roller in the hanging loop of a cord connecting two complementary hooks.
Each of these complementary hooks can be selected by means of a mechanical selection device in order to be carried along by one of two knives moving up and down in phase opposition. A hook which in not selected is not carried along by a knife and remains supported at a fixed hei ght, the non-selection height.
The lifter cord In attached to the first lifter element and in passed from that attachment point in succession under the reversing roller disposed at a fixed height and over the bottom lifter roller of the second lifter element.
The end of the lifter cord part situated beyond the second lifter element is provided for attaching to one or more harness cords for lifting warp threads on a is weaving loom.
At the moment of weft insertion on the weaving loom one of the two knives in each case is situated in its top dead centre, while the other knife is situated in its bottom dead centre. The complementary hook Interact- ing with a lifter element and interacting with the knife situated in Its bottom dead centre is situated at the non-selection height. Depending on the selection which has been made of the other hook, interacting with the knife situated in its top dead centre, said lifter element can be situated at two different heights at that moment: - A first height If that hook has not been selected, and a second height, h/2 higher than the first height, if that hook has actually been selected and has been lifted by its knife a height h above the non-selection height.
Taking both lifter elements to the first height causes the warp threads to go into their lowest position. if the first and the second lifter elements are taken to the second and the first height rha'pectively, the warp threads go a height h/2 higher than the lowest position. If the first and the second lifter elements are taken to the f irst and the second height respectively. the warp threads go a height h higher than the lowest position.
if both lifter elements are taken to the second height, the warp threads go a height 3 x h/2 higher than the lowest position.
Due to the fact that for each weft insertion each lifter element can be taken optionally to the first or the second height, the four different positions of the warp threads can be achieved for each weft insertion. This Jacquard machine in thus an open-shed Jacquard machine.
The object of this invention in to provide a four-position Jacquard machine with a differently designed lifter device.
This object in achieved by providing a fourposition Jacquard machine having the features mentioned in the first paragraph of this description, in which is according to a first alternative the first lifter cord is attached to a f ixed part, in passed f rom said part in succession over a lifter roller of the first lifter element, under the first reversing roller and over a second reversing roller, and beyond the second reversing roller is provided for lifting said warp threads, while a second lifter cord in provided, which second lifter cord attached to a fixed part is passed from said part over a lifter roller of the second lifter element, and beyond the lifter roller bears the second reversing roller.
For each weft insertion, the two lifter elements can be taken to two different heights. If each lifter element in its highest position In situated a height h/2 higher than in its lowest position, the four different positions of the warp threads are an follows: a lowest position, a position at a height h higher than the lowest position, a position at a height 2 x h higher than the lowest position, and a position at a height 3 x h higher than the lowest position. In what follows these positions are called Bottom, Centre-Bottom, Centre-Top, and Top respectively.
The Bottom position Is obtained by placing both lifter elements in their lowest position.
The Centre-Bottom position is obtained by placing the first and the second lit tor elements in the top position and the bottom position respectively. For the lift h of the first litter element causes the warp threads to be lifted by the same lit t h by way of the first litter cord.
The Centre-Top position in obtained by placing the first and the second litter elements in the bottom position and the top position respectively. For the lift h of the second litter element gives the second reversing roller the same lift h. This results in a lift 2h of the warp threads.
The Top position is obtained by placing both litter elements in their top position. In this situation the lift h of the warp threads resulting from the lift h of the first litter element in added to the lift 2h of the warp threads resulting from the lift h of the second element: h + 2h = 3h.
Due to the fact that each litter element can be placed at two different heights for each weft insertion, the four positions of the warp threads are also achievable for each weft insertion. This Jacquard machine can thus operate according to the open-shed principle.
The object of this invention described above is also achieved by a tourposition Jacquard machine com- prising a litter device with a first and a second litter element, and a first reversing roller which in provided at a fixed height and in in interaction with a lit tor cord for lifting one or more warp threads, and a device for taking each litter element optionally in each case to one of two different heights in successive working cycles, while according to a second alternative the litter cord in attached to a fixed part, from said part is passed in succession over a first lifter roller of the first litter element, under the first reversing roller, over a second litter roller of the first litter element, under a second reversing roller disposed at a fixed height, and over a litter roller of the second litter element, and beyond the litter roller of the second litter element in provided for lifting one or more warp threads on a weaving loom.
in the case of this embodiment the tour dif f erent positions of the warp threads are obtained an follows:
If both litter elements are placed In their lowest position, the warp threads also go into a lowest position (Bottom position). A lift h/3 of the first lit ter element results In a lit t 2 x h of the warp threads (Centre-Top position), since the lit ter cord In guided over two litter rollers of the first litter element. A lit t h/2 of the second litter element results in a lift h of the warp threads (Centre-Bottom position). A lift h/2 of the first and the second litter element results in a compound lit t 3 x h of the warp threads (Top position). Due to the fact that both litter elements can be placed optionally in their top or their bottom position for each weft insertion, the four different positions of the warp threads are also achievable for each weft insertion.
This Jacquard machine can thus likewise operate according to the open-shed principle.
in the case of the Jacquard machine according to the second alternative, the first and the second litter roller of the first litter element are preferably dis posed adjacent to each other.
in an embodiment which in preferred for both alternatives, each litter element Is suspended with a litter roller in the hanging loop of a cord connecting two complementary hooks, while each of these complemen tary hooks can be selected by a selection device for carrying along by one of two knives moving up and down in phase opposition, while a hook which has not been selected remains at a fixed height during the movement of the knives.
A special embodiment is characterized in that one hook of the hooks interacting with the first and the second lifter element can be carried along in each case by a first knife, while the other hooks can be carried along by a second and a third knife respectively, which knives are movable in phase opposition to the first knif c.
In another preferred embodiment, each fixed part in a grate immovably fixed on the frame of the Jacquard machine.
The reversing rollers provided at a fixed height are preferably also disposed on a grate immovably fixed on the frame of the Jacquard machine.
This invention is illustrated further in the following detailed description of an example of each of the two alternatives according to this invention. In this description reference in made to the appended figures:
Figure 1 in a perspective drawing of a lifter device and three knives interacting therewith in a fourposition Jacquard machine according to the first alternais tive.
Figure 2 is a perspective drawing of a lif ter device and two knives interacting therewith in a fourposition Jacquard machine according to the second alternative.
Figure 3 shows the same an Figure 2, but viewed from another direction.
A preferred embodiment of a four-position Jacquard machine according to the first alternative (ace Fig. 1) comprises a first (1) and a second lifter element (2), which are provided with two rotatable lifter rollers (3, 4), (5, 6) disposed one above the other. Bach lifter element (1), (2) in suspended with Its top lifter roller (3), (5) in the hanging loop of a cord (7), (8) connect ing two complementary hooks (9, 10), (11, 12).
One hook (10), (11) of each not of complementary hooks (9, 10), (11, 12) can be carried along in each case by a first knife (14) while the other hooks (9), (12) can be carried along by a second (13) and a third knife (15) respectively, said second (13) and third knife (15) extending in the same direction on either side of the first knife (14). The knives (13), (14), (15) can be driven by a drive unit (not shown) so that they carry out an up and down movement, the first knife (14) moving in phase opposition relative to the second (13) and the third knife (15).
A hook (9, 10, 11, 12) carried along by a knife (13), (14), (15) rents with its supporting lug (16) on the top side of said knife (13), (14), (15).
The Jacquard machine also comprises a selection device (not shown in the figure) of the electronic type for either selecting or not selecting each hook (9, 10, 11, 12). There are Jacquard machines with selection when the hook has been taken to a height h above a reference position. When a hook is selected, it in suspended by its opening from a projection and will thus remain up during the return of the knif e. The f igures show this type of selection.
There are also Jacquard machines with selection is of the hook in its position down at the reference posi- tion. When the hook In selected, it in act with its supporting lug on the knife, and when it in not selected, the hook in kept away from the knife. It is this type of selection which in described below by way of example. The selection of a hook (9, 10, 11, 12) occurs at the moment when the knife (13), (14), (15) interacting with said hook is situated in its bottom dead centre. The selection occurs by taking the hook at a selection height into such a position - a carry position - that it hooks 25 with its supporting lug (16) onto its knife (13), (14), (15). The.hook (9, 10, 11, 12) in then carried along by said knife (13), (14), (15). At the moment when said knife (13), (14), (15) is situated in its top dead centre, the hook (9, 10, 11, 12) has been lif ted over a height (h) above the selection height. At the moment when said knif e (13), (14), (15) in situated back in its bottom dead centre, the hook (9), (10), (12) which has been carried along has been taken back to the selection height. The hook can then either remain selected or be placed in a non-carry position and remain at the selection height during the following movement cycle of the knives (13), (14), (15). For a hook (9, 10, 11, 12) which has not been selected in taken into such a position at the selection height - the non-carry position - that its supporting lug (16) rwmins outside the range of its knife (13), (14), (15). The selection device in, for example, provided with =cans for exerting an electromagnetic force on each 5 of the books (9, 10, 11, 12). A book in taken f rom the carry position to the non-carry position, or vice versa, through an electromagnetic f orce being exerted on said hook. When no further electromagnetic f orce in exerted, the hook springs back to its original position. Zach time that one of the two knives (13), (14); (14), (15) Interacting with a lifter element (1), (2) in situated in Its top dead centre (i.e. after each half movement cycle of the knives) a weft insertion occurs on the weaving loom. For each weft insertion, each lifter is eleaaent (1), (2) can be situated at a first height or at a second height - h/2 higher than the first height depending on the selection which has been made.
A lif ter element (1), (2) of which both hooks (9, 10), (11, 12) are situated at the selection height is situated at the first height. If one of the two hooks (9), (10); (11), (12) of a lifter element (1), (2) has been selected by its knife (13), (14), (15) and has been taken by Its knife (13), (14), (15) a height (h) above the selection height, said lifter element has been lifted a height h/2 above the first height.
In the case of the embodiment shown In Figure 1, according to the first alternative, provision In made for a first lifter cord (17) which in attached by one end to a first grate (18) vably fixed on the frame of the Jacquard machine, and from naid grate (18) in successively passed over the bottom lifter roller (4) of the first lifter element (1), under a first reversing roller (20) disposed on a second grate (19) immovably fixed on the frame, and over a second reversing roller (21), while at the other end (22), beyond the second reversing roller (21), said first lifter cord (17) is provided so that it can be attached to one or more harness cords (23) for lifting warp threads (not shown in the figure) on a weaving loom. A second lifter cord (24) is also provided, which lif ter cord in attached by one end to a third grate (2 5) immovably fixed on the f rame of the Jacquard machine, from said grate (25) is passed over the bottom lifter roller (6) of the second lifter element (2), and beyond the lifter roller (6) is attached by the other end to the second reversing roller (21), so that it bears said reversing roller (21).
The Bottom positioin of the warp threads in obtained by taking both lifter elements to the first height. By lifting only the first lifter element (1) a height h/, higher, the lifter cord end (22) connected to harness cords In taken a height h upwards, so that the warp threads go into the Centre-Bottom position. By only lifting the second lifter element (2) a height h/2 is higher, the second reversing roller (21) in taken a height h upwards, so that the abovementioned lifter cord end (22) in taken a height 2 x h higher. By lif ting both the f irst (1) and the second lif ter element (2) over a height h/2, one obtains a lif t of the warp threads over a height 3 x h.
These f our positions can be achieved for each weft insertion on the weaving loom, so that this Jacquard machine can operate according to the open-shed principle. This makes this Jacquard machine suitable for obtaining all kinds of tying-in of dead pile warp threads, and pile transitions can be made without mixed contours.
The embodiment according to the second alternative shown in Figures 2 and 3 comprises a first (30) and a second lifter element (31). The first lifter element (30) has one top rotatable lifter roller (32) and two bottom rotatable lifter rollers (33), (34) disposed adjacent to each other. The second lifter element (31) has one top (35) and one bottom rotatable lifter roller (36).
Each lifter element (30), (31) is suspended with its top lifter roller (32), (35) in the hanging loop of a cord (37), (38) connecting two complementary hooks (39, 40), (41, 42). Of each set of complementary hooks (39, 40), (41, 42) there is one hook (39), (41) which can be carried along by a first knife (43) and one hook (40), (42) which can be carried along by a second knife (44), so that the two liftet elements (30), (31) are suspended next to each other. This Jacquard machúne is provided with an electronic selection device, by means of which each hook (39), (40), (41), (42) either can be placed in a carry position or can be carried along by its knif e (43), (44), or can be placed In a non-carry position and remains at the selection height during a movement cycle 10 of the knives. The knives (43), (44) can be driven by a drive unit (not shown in the figures) so that they move up and down In phase opposition. Said lifter device comprises a lifter cord (45) which in attached by one and to a first grate (46) Immovably fixed on the frame of the is Jacquard machine, and in passed from said grate (46) in succession over one bottom lifter roller (33) of the first lifter element (30), under a first reversing roller (48) disposed on a second grate (47) immovably fixed on the frame, over the other bottom lifter roller (34) of 20 the first lifter element (30), under a second reversing roller (50) disposed on a third grate (49) immovably fixed on the frame, and over the bottom lifter roller (36) of the second lifter element (31). Beyond the bottom lifter roller (36) of the second lifter element (31), the 25 other end (51) of said lif tor cord (45) In provided so that it can be attached to one or more harness cords (52) for lif ting warp threads on a weaving loom. Depending on the selection made, each lifter element (30), (31) can be taken into four different 30 positions for each weft insertion on the weaving loom. If neither of the two lifter elements (30), (31) is lifted, the Bottom position is obtained. If only the first lif tor element (30) is lifted over a height h/,, one obtains a lift of the warp threads over a height 2h: Centre-Top 35 position. If only the second lifter element (31) in lif ted over a height h/,, one obtains a lift of the warp threads over a height h: Centre-Bottom position. If both lifter elements (30), (31) are lifted over a height h/21 one obtains a lift of the warp threads over a height 3h:
Top position.
The Jacquard machine according to thesecond alternative can thus likewise operate according to the open-shed principle.
The embodiment according to the second alterna tive (Figures 2 and 3) differs from the embodiment according to the first alternative (Figure 1) in that the lifter elements (30), (31) are suspended in adjacent planes. The reversing rollers (48), (50) munt consequently be disposed at an angle relative to said planes. In the embodiment according to the first altern-ative the lifter elements are suspended in the name plane one after the other, so that the reversing rollers (20), (21) can also be situated in said same plane.
C L A 1 M S is Four-position Jacquard machine, comprising a lif tor device with a first (1) and a second lif tor element (2) and a first reversing roller (20) which is provided at a fixed height and Is in interaction with a first lif tor cord (17) f or lif ting one or more warp threads, and a device (13, 14, 15) for taking each lif tor element (1), (2) optionally in each case to one of two different heights In successive working cycles, characterized in that the first lifter cord (17) is attached to a fixed part (18), in passed from said part (18) in succession over a lifter roller (4) of the first lifter element (1), under the first reversing roller (20) and over a second reversing roller (21), and beyond the second reversing roller (21) is provided for lifting said warp threads, and in that a second lifter cord (24) in provided, which cord in attached to a fixed part (25), is passed f rom said part (25) over a lif tor roller (6) of the second lifter element (2), and -beyond the lifter roller (6) boars the second reversing roller (21).
Four-position Jacquard machine, comprising a lifter device with a first (30) and a second lifter element (31) and a first reversing roller (48) which Is provided at a fixed height and is in interaction with a first lifter cord (45) for lifting one or more warp threads, and a device (43, 44) for taking each lifter element (30), (31) optionally in each case to one of two different heights in successive working cycles, cha acterized in that the lifter cord (45) is attached to a fixed part (46), is passed from said part (46) In succession over a f irst lit ter roller (33) of the f irst lit ter element (30), under the first reversing roller (48), over a second litter roller (34) of the first litter element (30), under a second reversing roller (50) disposed at a fixed height, and over a litter roller (36) of the second litter element (31), and beyond the litter roller (36) of the second litter element (31) in provided for lifting one or more warp threads.
3. Four-position Jacquard machine according to
Claims (1)
- Claim 2, cha acterized in that the first (33) and the second litter roller(34) of the first litter element (30) are disposed adjacent to each other.4. Your-position Jacquard machine according to =c of the preceding claims. characterized in that each litter element (1), (2); (30), (31) is suspended with a lit ter roller (3), (5); (32), (35) in the hanging loop of a cord (7), (8); (37), (38) connecting two complementary books (9, 10), (11, 12); (39), (40), (41), (42), in that each of these complementary hooks can be selected by a selection device and carried along by one of two knives (13, 14, 15), (43, 44) moving up and down in phase opposition, while a book which has not been selected remains at a fixed height during the movement of the knives.5. Your-position Jacquard machine according to Claim 4, ch- acterized In that one hook (10), (11) of the hooks (9, 10), (11, 12) interacting with the first (1) and the second litter element (2) can be carried along by a first knife (14) in each case, while the other hooks (9), (12) can be carried along by a second (13) and a third knife (15), which knives are movable in phase opposition to the first knife (14).6. Four-position Jacquard machine according to one 35 of the preceding claims, characterized in that each fixed part (18), (46) in a grate immovably fixed on the frame of the jacquard machine.7. Four-position jacquard machine according to one of the preceding claims, cha acterized in that each reversing roller (20); (48), (50) provided at a fixed height in disposed on a grate (19); (47), (49) immovably fixed on the frame of the Jacquard machine.8. Four-position Jacquard machine according to one of the preceding claims, characterized in that it in an electronic Jacquard machine.9. Four-position jacquard machine substantially as described herein, with reference to and as shown in Figure 1 or Figures 2 and 3 of the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9500424A BE1009383A3 (en) | 1995-05-10 | 1995-05-10 | FOUR TEETH-jacquard. |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9609658D0 GB9609658D0 (en) | 1996-07-10 |
GB2300650A true GB2300650A (en) | 1996-11-13 |
GB2300650B GB2300650B (en) | 1998-09-09 |
Family
ID=3888974
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9609658A Expired - Fee Related GB2300650B (en) | 1995-05-10 | 1996-05-09 | Four-position jacquard machine |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE1009383A3 (en) |
DE (1) | DE19617808C2 (en) |
FR (1) | FR2734000B1 (en) |
GB (1) | GB2300650B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1111107A1 (en) * | 1999-12-23 | 2001-06-27 | NV Michel van de Wiele | Shed-forming device for a weaving machine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE529019A (en) * | ||||
EP0612874A1 (en) * | 1993-02-12 | 1994-08-31 | CHEMNITZER WEBMASCHINENBAU GmbH | Method and device for making a double-carpet |
EP0665312A1 (en) * | 1994-01-28 | 1995-08-02 | Staubli-Verdol S.A. | Shedding mechanism providing four warp yarns positions in a loom |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE548296A (en) * | ||||
FR1050774A (en) * | 1956-08-20 | 1954-01-11 | Lehembre & Cie A | Universal multi-position mechanics for looms |
BE1004347A3 (en) * | 1990-05-31 | 1992-11-03 | Wiele Michel Van De Nv | HOIST suspension for a Jacquard jacquard AND WITH SUCH SUSPENSION HOIST. |
BE1005823A3 (en) * | 1992-05-19 | 1994-02-08 | Wiele Michel Van De Nv | HOISTING EQUIPMENT FOR JACQUARD MACHINE. |
-
1995
- 1995-05-10 BE BE9500424A patent/BE1009383A3/en active
-
1996
- 1996-05-03 DE DE1996117808 patent/DE19617808C2/en not_active Expired - Fee Related
- 1996-05-09 GB GB9609658A patent/GB2300650B/en not_active Expired - Fee Related
- 1996-05-09 FR FR9605784A patent/FR2734000B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE529019A (en) * | ||||
EP0612874A1 (en) * | 1993-02-12 | 1994-08-31 | CHEMNITZER WEBMASCHINENBAU GmbH | Method and device for making a double-carpet |
EP0665312A1 (en) * | 1994-01-28 | 1995-08-02 | Staubli-Verdol S.A. | Shedding mechanism providing four warp yarns positions in a loom |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1111107A1 (en) * | 1999-12-23 | 2001-06-27 | NV Michel van de Wiele | Shed-forming device for a weaving machine |
BE1013193A3 (en) * | 1999-12-23 | 2001-10-02 | Wiele Michel Van De Nv | Shed-forming device for a weaving machine. |
US6336478B2 (en) | 1999-12-23 | 2002-01-08 | N.V. Michel Van De Wiele | Shed-forming device for a weaving machine |
Also Published As
Publication number | Publication date |
---|---|
FR2734000A1 (en) | 1996-11-15 |
DE19617808C2 (en) | 2003-04-17 |
BE1009383A3 (en) | 1997-03-04 |
GB2300650B (en) | 1998-09-09 |
FR2734000B1 (en) | 1997-11-21 |
DE19617808A1 (en) | 1996-11-14 |
GB9609658D0 (en) | 1996-07-10 |
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