EP0502528A1 - Dispositif de palonnier pour monter ou abaisser au moins un fil de chaîne dans une machine jacquard, en particulier une machine à foule ouverte - Google Patents

Dispositif de palonnier pour monter ou abaisser au moins un fil de chaîne dans une machine jacquard, en particulier une machine à foule ouverte Download PDF

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Publication number
EP0502528A1
EP0502528A1 EP92103785A EP92103785A EP0502528A1 EP 0502528 A1 EP0502528 A1 EP 0502528A1 EP 92103785 A EP92103785 A EP 92103785A EP 92103785 A EP92103785 A EP 92103785A EP 0502528 A1 EP0502528 A1 EP 0502528A1
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EP
European Patent Office
Prior art keywords
pulley
cord
side pieces
pulley device
rail
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Granted
Application number
EP92103785A
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German (de)
English (en)
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EP0502528B1 (fr
Inventor
Carlos Derudder
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Individual
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Individual
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Publication of EP0502528A1 publication Critical patent/EP0502528A1/fr
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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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types

Definitions

  • the invention relates to a pulley device for lifting and lowering at least one warp thread in a jacquard machine, in particular open-pocket jacquard machine, by means of at least one knife element which engages at least one sinker element connected to the warp thread, comprising at least one pulley block with a movable pulley element, a stationary one Pulley element, a connecting cord that connects the movable pulley element to at least one sinker element, and a pulley cord that connects the movable pulley element to the stationary pulley element, and one end of which is connectable to a warp thread and the other end of which is attached to one of the two pulley elements.
  • a block and tackle device of this type is known from DE-B 29 39 714. According to FIG. 1, the pulleys lying next to one another transversely to the longitudinal direction of the knife are fastened with their stationary pulley elements to a bar that is transverse to the longitudinal direction of the knife.
  • the invention has for its object to provide a block and tackle device of the type mentioned, which allows the most exact possible adjustment of the block and tackle parallel to the longitudinal direction of the knife in a simple manner.
  • This object is achieved in that the stationary pulley element is displaceable on an elongated, substantially parallel to the knife longitudinal direction of the at least one knife element holding element and is designed to be fixed thereon in an optional displacement position.
  • the adjustment of the pulley blocks is very important at the high machine speeds and tensile loads of modern jacquard machines for trouble-free, low-wear long-term operation.
  • the orientation of the stationary block and tackle elements perpendicular to the longitudinal direction of the knife is determined by the mounting elements which can be positioned exactly without difficulty.
  • the required position adjustment can be easily achieved by correspondingly moving the fixed pulley elements along the mounting elements.
  • a particular advantage is that the readjustment can be carried out in rows, ie in each case for a row of boards or pairs of boards lying side by side in the longitudinal direction of the knife in the case of the embodiment according to claim 4.
  • the orientation transverse to the longitudinal direction of the knife is unproblematic, since the movable block and tackle element automatically runs in the optimal position within the bottle line perpendicular to the knife longitudinal direction (claim 3).
  • a further advantage is that the pulley blocks belonging to a row of circuit boards or pairs of circuit boards can be assembled or disassembled by correspondingly pushing or pushing the stationary pulley elements onto the mounting element or from the mounting element.
  • the mounting elements are particularly preferably formed by rails (claim 2), preferably as part of a grid (claim 16).
  • the end of the pulley cord away from the warp thread is attached to the stationary or to the movable pulley element.
  • the arrangement according to claim 5 is particularly preferred. This ensures a stroke increase by a factor of 1.5.
  • the pulley assigned to a circuit board or a pair of circuit boards only requires one attachment point, possibly in the form of a single fixed grid for all pulley systems. The installation height is also reduced accordingly.
  • two knives moved in opposite phase are provided, each of which engages on a board of a pair of boards or on a corresponding row of boards.
  • a desired board can be held in its top or bottom position (open pocket jacquard machine) while the knife is moving up and down.
  • the two hooks (1) and (2) which are just opposite one another, as shown in the attached FIGS. 1a and 1b, and which belong to a different, complementary series, are in this type of jacquard machines with one and the same pulley cord (3 ) connected, which carries a free pulley element (4). It contains two rotatable rollers (4 ') and (4 ").
  • the pulley cord (3) is connected to the lower end of the hooks (1) and (2) and runs downwards, where it passes over the upper roller (4').
  • the second pulley cord (5) runs over the lower roller (4 '') of the pulley element (4), one end of which is lower with a grid (6) and the other end is lower is connected to the upper roller (7 ') of a second free pulley element (7) which is provided with the rollers (7') and (7 '') and which is identical to the pulley element (4)
  • Roll (7 '') of the pulley element (7) runs a third pulley cord (8), one end of which is connected to a grid (9) and the other end of which is connected to a warp cord by a harness cord.
  • each warp thread can be selected individually, depending on the weave to be woven be raised to a certain height. These two layers of the warp threads correspond to possible different positions of the hooks (1) and (2) connected to them.
  • Known selection aids can namely select the same height of each hook (1) and (2), namely the highest position in which each hook is brought by a knife. For example, if the hook (1) is held up as a result of a selection, then the knife will drop under the hook 1 and the knife under the hook (2) will then be raised by the height h.
  • the lowest position of a particular warp thread corresponds to the situation in which the two hooks (1) and (2) move freely with their respective knives up and down (Fig.1a).
  • the highest position of a particular warp thread is assumed when its two hooks (1) and (2) are in their highest position (see FIG. 1b). When lifting a hook (2) to a height h (see FIGS. 1a and 1b ) the warp thread is raised to a height of 2 hours.
  • the aim of the invention is to remedy those disadvantages with a pulley device, which consists of a free and a fixed pulley element exists, so that only a single fixed grid is required, which results in a lower installation height of the block and tackle device and a simpler and less cumbersome installation, which is more cost-effective if one makes a comparison with the conventional block and tackle device.
  • An object of the invention is a pulley device, which due to their cooperation on the one hand with two complementary hooks and on the other hand with one or more warp threads this warp thread (or these warp threads) can be lifted to a certain height with a stroke extension and from an upper, free pulley -Element with two superimposed, rotatable rollers and a lower fastening point for a pulley cord, and consists of a fixed pulley element with a rotatable roller, the pulley elements being connected for the purpose of cooperation:
  • This pulley cord carries the upper, free pulley element, which hangs in the pulley cord with its upper roller.
  • a second pulley cord which is connected at one end lower to one or more warp threads, runs upwards and is deflected over the lower roller of the free pulley element, then runs back down and is deflected at the roller of the fixed pulley element to finally run up, where the other end is connected to the underside of the free pulley element.
  • the free pulley element is carried upwards by a height h / 2 by the pulley cord carrying this pulley element.
  • the lower pulley cord is also pulled up by a height h / 2 at its end attached to the free pulley element, while the lower roller of the free pulley element - over which this pulley cord is guided - also goes up by a height h / 2 .
  • Another object of the invention is a fixed pulley element and its arrangement-serving aids for one explained here Pulley device.
  • the fixed block and tackle element consists of two plate-shaped side pieces, the upper edge of which laterally encloses the roller located on an axis and lies in surfaces perpendicular to the axial direction, as well as an identical length below Transverse opening of a recess opening into an edge are provided so that the pulley element can be moved on a rail - or a similar element - lying parallel to the axis of the roller, this opening or recess comprising this rail or its profiled edge and the side pieces lie in areas that are perpendicular to the longitudinal direction of this rail.
  • the hooks are arranged directly next to one another in rows, so that when multiple pulley devices according to the invention are arranged, they extend parallel to one another vertically and closely next to one another.
  • the fixed pulley elements then sit tightly next to each other with a small distance on a rail, a slat or a similar element, with their lateral side pieces pointing vertically upwards and parallel to one another.
  • These pulley elements are pushed one after the other onto the rail from the end thereof and possibly separated from one another with the aid of intermediate pieces which can be pushed onto that rail, while aids are provided on the left and right of a row of the elements pushed onto a rail can be attached to the rail to prevent lateral movement of the pulley elements.
  • a fixed pulley is Element provided which consists of two parts which are easily separated from one another, while each part encloses a section of the rail or a similar element at the bottom, so that each part separately without being displaced to the end of that rail or similar element, can be removed from this, while the two joined parts of the block and tackle element form a transverse opening or recess which individually allows displacement on the rail or a similar arrangement aid.
  • the block and tackle device interacts with two complementary hooks (11) and (12) of a jacquard machine, in which these hooks (11) and (12) are held by a knife (13) and (14) can be taken along and each hook can be held in the highest position using known selection aids. If a knife (13) is at the top, the knife (14) is brought into a lower position by the height difference.
  • the pulley device contains a pulley element (15) which is composed of two identical, elongated, flat plates (15 ') and (15'') which, in a small distance apart, connected by three axes (16), (17), (18) in parallel. These axes (16), (17) and (18) run in the space between the two plates (15 ') and (15'') perpendicular to their surfaces from one plate to the other and are in the same perpendicular to them Plates (15 ') and (15'') and in the transverse surface of symmetry of the block and tackle element (15), which lies in its longitudinal direction.
  • Rotatable rollers (19) and (20) are seated on the axes (16) and (17), while the axis (18) remains free to fasten the end of a pulley cord (21).
  • the running surface of the rollers (19) and (20) is provided on its entire circumference with a U-shaped recess or laterally raised edges for guiding the pulley cords (10) and (21) running over these running surfaces.
  • the pulley device according to the invention also contains a pulley cord (10) which runs from one end connected to the hook (11) down over the underside of the roller (19) and further upwards, where the other end with the Hook (12) is connected.
  • the pulley element (15) - with its roller (19) - hangs in the loop formed by the downward hanging pulley cord (10). So the pulley element (15) hangs vertically, the axes (16), (17) and (18) lying in this order from top to bottom on a straight, vertical line.
  • the pulley device contains a fixed pulley element (22), which in a first possible, preferred embodiment according to the invention consists of two identical, elongated, flat and plate-shaped pieces (22 ') and (22' ') , which, at a short distance from each other, are arranged parallel to each other and connected to each other by an axis (23).
  • This axis (23) extends perpendicular to both plates (22 ') and (22' ') close to one of their transverse edges from one plate to the other in the space between them.
  • the transverse edge of the two plates (22 ') and (22' ') lying close to the axis (23) is called the upper edge and is rounded.
  • the lower transverse edge is straight, runs perpendicular to the longitudinal direction and is called the lower edge.
  • a rotatable roller (24) On the axle (23) sits a rotatable roller (24), which is provided with a U-shaped recess extending over the entire running surface or with upstanding edges for guiding a pulley cord (21).
  • each pair of complementary hooks (11) and (12) is of course provided with such a pulley device, so that a large number of such pulley devices extend vertically close together.
  • the pulley element (22) must always be fixed with respect to the machine on the arrangement aids provided for this purpose, which consist of a horizontally arranged grid which is made up of a number which is horizontal and rails (25) extending parallel to the knives (13) and (14). All pulley elements (22) can be attached to each rail (25) side by side, which interact with the same two rows of complementary hooks (11) and (12).
  • the pulley devices extending side by side are arranged such that the side plates (15 ') and (22') or (15 '') and (22 '') of the pulley elements (15) and (22) are in one another are each the same vertical surfaces that are perpendicular to the longitudinal direction of the knives (13) and (14).
  • the pulley elements (22) must consequently sit on the rail (25) in such a way that their side plates (22 ') and (22'') lie in a surface which perpendicularly intersects the longitudinal axis of the rail (25).
  • T-shaped recess is provided in each plate on the underside of both plates (22 ') and (22''), the recesses of the two plates (22') and (22 '') being just opposite one another and the narrowest upright part of the T-shape opens into the lower transverse edge.
  • This T-shaped recess allows the pulley element (22) to be pushed onto the T-shaped, profiled upper edge of a rail 25 in order to secure a fixed position in the correct position.
  • Each block and tackle element 22 sits, pushed onto the rail (25), with a small, fixed space parallel to the next. So that this fixed space can be preserved, an intermediate piece - with the same T-shaped recess - is inserted between two pulley elements (22) (not shown).
  • This space - and consequently the width of these spacers - is set such that each pulley device (all pulley cords and elements) from the attachment points on the hooks (11) and (12) to the attachment point on the warp thread (or Warp threads) or the harness cord runs vertically. Consequently, this space depends on the horizontal distance between the fastening points of the pulley cords (10) of the two hooks (11) and (12) standing next to one another.
  • each pulley element (22) are connected to one another - via the axis (23) - in such a way that they can be easily taken apart, for example by a gripper connection or any known connection. Aid is useful that allows quick and easy assembly and disassembly, preferably without the use of special tools.
  • the axis (23) remains fixed at one end on one of the two plates (22') or (22 ''), and the roller (24) can be pulled off the free end of that axis (23).
  • the two individual parts (22 ') and (22' ') can be moved on the rail (25) by themselves, but cannot be removed by moving them to the end of the rail (25), where they are separated from the T -shaped upper edge can slide. If you want to remove a given pulley element (22), then all pulley elements (22) that are on the rail (25) to the left or right of the specified pulley element must be pushed down from this rail (25) so that the pulley element (22) to be removed can also leave the rail (25). In order to remedy that disadvantage, in another preferred embodiment according to the invention a pulley element is provided which will be described further.
  • one end of a pulley cord (10) is attached to the lower end of each of the two complementary hooks (11) and (12).
  • FIGS. 3a and 3b Another possible embodiment according to the invention (see FIGS. 3a and 3b) is a pulley element which can be dismantled into three different parts (28), (29) and (30), which comprises the two side pieces (28) and (29) and the roller (30) contains.
  • Each side piece (28) and (29) of the pulley element (27) consists of an elongated object, in which three sections can be distinguished: namely an elongated body (28 '') and (29 ''), respectively, on its one end ends in a round head (28 ''') or (29''') and is provided at its other end with a profiled section (28 ') or (29').
  • the round heads (28 ''') and (29''') are hollowed out at the edges of the side pieces (28) and (29) facing each other, while an axis (31 ) extends perpendicular to the longitudinal direction of that side piece (28) in the direction of the other side piece (29).
  • a cylindrical recess (32) is provided in the middle of the side piece (29) into which the end (31') of the axis (31) with a smaller diameter than the axis ( 31) can be inserted by yourself.
  • the roller (30) sits on the axis (31) of the side piece (28), and the end (31 ') of the axis (31) is in the recess (32) of the Side piece (29) pushed.
  • the diameter of the end (31 ') and the recess (32) is chosen such that the end (31') clamps in that recess (32) and thus ensures a connection of the two side pieces (28) and (29).
  • the roller (30) fits with its side flanks into the walls of the hollows of the round heads (28 '' ') and (29' '') of the side pieces (28) and (29) in such a way that they freely move around the axis (31) can rotate when the roller (30) is flanked by the heads (28 '') and (29 '') of the joined side pieces (28) and (29).
  • connection aid consists of a hook-shaped finger (33) which extends from the side piece (29) on the side directed towards the side piece (28) into a bore (34) provided in the side piece (28), in which the hook-shaped finger (33) can slide through and thereby become hooked in that the hook-shaped end of the finger (33) comes along the other side of the side piece (28) through the bore (34) and jumps behind an edge of this bore (34) as soon as the side pieces (28) and (29) are joined together.
  • This hook-shaped finger (33) consists in particular of an elongated object bent at right angles with a small, square section which forms part of the side piece (29), and with a section which merges into the side piece (29) and which leads to the Longitudinal direction of the side piece (29) in the direction of the fastening parts (29 ') more or less runs in parallel, and with a part forming a right angle with this section, which extends in the direction of the side piece (28).
  • the latter part ends in a hook (33 ') which runs in the direction of the fastening parts (29').
  • a transverse bore (34) is provided in the side piece (28) opposite the hook (33 ') of the finger (33).
  • the hook (33 ') of the finger (33) can be brought into the bore (34) - which has the same dimensions - in such a way that the position of the finger (33) with respect the side piece (29) is slightly changed.
  • the finger (33) must be bent elastically so that it can stand at a different angle to the side piece (28). In order to bring the hook (33 ') of the finger (33) into the bore (34), it must be pressed in the direction of the side piece (28). As soon as this hook (33 ') is then inserted through the bore (34), the finger (33) returns to its original position. This causes the hook (33 ') to settle behind the edge of the bore (34) on the outer edge of the pulley element.
  • each side piece (28) and (29) ends in a profiled section (28 ') and (29').
  • These sections (28 ') and (29') are designed in such a way that, as soon as the side pieces (28) and (29) are assembled, they form a bar-shaped section in the full width of the pulley element, in that over that width a symmetrical, T-shaped recess is provided which opens with its upright part in the flat side, which - perpendicular to the longitudinal direction of the pulley element - forms the flat end wall of the pulley element.
  • Sections (28 ') and (29') have the same shape, but in the position in which they are to be assembled, one of them is rotated with respect to the other by an angle of 180 ° about an axis that is to the longitudinal axis the side pieces (28) and (29) are parallel.
  • the section (28 ') of the lying left side piece (28) looks at the section (28 ') of the lying left side piece (28) (see FIG. 3b), it consists of a horizontal, bar-shaped part (35) with a flat underside in the extension of the underside of the body (28'') , wherein it runs out laterally in a width which corresponds to the width of the assembled pulley element and has a height less than half the height of the body (28 '').
  • a U-shaped groove (36) which is provided over the entire width. The front of this groove (36) slopes backward from top to bottom, causing the groove to go down is getting wider.
  • the rear side (37) of this groove is held higher and merges into a horizontal section (38) which adjoins the full width of the higher side wall (37) at the top; a vertical wall (39) adjoining the horizontal section - which extends over the entire width of the section (38) - then merges into the top of the body (28 ''), which in the process adjoins the upper part of the said vertical Wall (39) connects over their total width.
  • the horizontal, planar section (35) of the side piece (29) lying along the groove (36) reaches the horizontal section (38), the groove (36) going downward points.
  • the horizontal section (38) of the side piece (29) reaches the rear, flat section (35 ') of the beam-shaped section (35) of the side part (28) lying along the groove (36).
  • the grooves (36) form the lateral arms of the T-shaped recess - with sloping upward, lower sides -, and the upstanding part of the T-shaped recess, which in the underside of the pulley part (27) opens, and which must enclose the upstanding part of the T-shaped edge of the rail (25), is from the free space between the lower along the groove (36), flat Absc cut (35 '') of the two bar-shaped parts (35).
  • An advantage of the block and tackle device according to the invention is that a device is obtained which only requires a single fixed grating, as a result of which a simpler and less expensive arrangement can be achieved.
  • Another advantage of the invention lies in the fact that when using only one fixed grid, a much lower installation height is required for the entire pulley system, which means that the jacquard machine involved does not have to be arranged as high, which in turn is easier and less expensive to implement Construction results.
  • Another advantage of the invention lies in the fact that the arrangement of the fixed pulley elements, which are pushed onto a rail (25), namely alongside one another, considerably simplifies the device.
  • a still further advantage of the invention namely the embodiment for a fixed pulley element shown in detail in FIGS. 3a and 3b and its possible uses, lies in the ease with which a pulley element of this type can be used from a complete series of such fixed elements Pulley elements can be removed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Load-Engaging Elements For Cranes (AREA)
EP92103785A 1991-03-06 1992-03-05 Dispositif de palonnier pour monter ou abaisser au moins un fil de chaîne dans une machine jacquard, en particulier une machine à foule ouverte Expired - Lifetime EP0502528B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9100214A BE1004692A4 (nl) 1991-03-06 1991-03-06 Takelinrichting voor bewegingsversterking bij de heffing van de kettingdraden, in een opengaap jacquardmachine.
BE9100214 1991-03-06

Publications (2)

Publication Number Publication Date
EP0502528A1 true EP0502528A1 (fr) 1992-09-09
EP0502528B1 EP0502528B1 (fr) 1995-12-20

Family

ID=3885372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92103785A Expired - Lifetime EP0502528B1 (fr) 1991-03-06 1992-03-05 Dispositif de palonnier pour monter ou abaisser au moins un fil de chaîne dans une machine jacquard, en particulier une machine à foule ouverte

Country Status (6)

Country Link
US (1) US5222526A (fr)
EP (1) EP0502528B1 (fr)
JP (1) JPH0791721B2 (fr)
KR (1) KR920018268A (fr)
BE (1) BE1004692A4 (fr)
DE (1) DE59204714D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0627511A1 (fr) * 1993-04-23 1994-12-07 N.V. Michel Van de Wiele Machine jacquard

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9400635D0 (en) * 1994-01-13 1994-03-09 Bnl Ltd Improvements relating to supporting carcasses for rollers
BE1014815A3 (nl) * 2002-05-07 2004-04-06 Wiele Michel Van De Nv Inrichting voor het bevestigen en het geleiden van ten minste een takelkoord in een jacquardmachine en jacquardmachine voorzien van een of meerdere dergeljke inrichtingen.
EP3112509A1 (fr) * 2015-07-02 2017-01-04 NV Michel van de Wiele Pièce de raccordement pour éléments de raccord d'un mécanisme de formation de foule d'un métier à tisser

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2939714B1 (de) * 1979-09-29 1980-10-16 Zangs Ag Maschf Doppelrollenelement fuer Jacquardmaschinen
EP0399930A1 (fr) * 1989-05-24 1990-11-28 Staubli-Verdol S.A. Perfectionnements aux mécaniques d'armure à trois positions

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE529019A (fr) *
BE548296A (fr) *
GB883257A (en) * 1958-05-05 1961-11-29 Lehembre & Cie A Improvements in jacquard mechanism for weaving looms
DE3233547A1 (de) * 1982-09-10 1984-03-15 Fa. Oskar Schleicher, 4050 Mönchengladbach Fachbildevorrichtung fuer textilmaschinen, insbesondere webmaschinen
DE3817416C1 (fr) * 1988-05-21 1989-07-06 Fa. Oskar Schleicher, 4050 Moenchengladbach, De
EP0421370B1 (fr) * 1989-10-03 1994-04-13 Grosse Webereimaschinen GmbH Palonnier pour machine Jacquard

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2939714B1 (de) * 1979-09-29 1980-10-16 Zangs Ag Maschf Doppelrollenelement fuer Jacquardmaschinen
EP0399930A1 (fr) * 1989-05-24 1990-11-28 Staubli-Verdol S.A. Perfectionnements aux mécaniques d'armure à trois positions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0627511A1 (fr) * 1993-04-23 1994-12-07 N.V. Michel Van de Wiele Machine jacquard
BE1008209A4 (nl) * 1993-04-23 1996-02-13 Wiele Michel Van De Nv Jacquardmachine.
US5522435A (en) * 1993-04-23 1996-06-04 N.V. Michel Van De Wiele Machine for weaving face to face fabrics

Also Published As

Publication number Publication date
US5222526A (en) 1993-06-29
JPH0791721B2 (ja) 1995-10-04
BE1004692A4 (nl) 1993-01-12
JPH0571035A (ja) 1993-03-23
DE59204714D1 (de) 1996-02-01
KR920018268A (ko) 1992-10-21
EP0502528B1 (fr) 1995-12-20

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