EP0398399A1 - Device for presenting weft threads on weaving machines - Google Patents
Device for presenting weft threads on weaving machines Download PDFInfo
- Publication number
- EP0398399A1 EP0398399A1 EP90200822A EP90200822A EP0398399A1 EP 0398399 A1 EP0398399 A1 EP 0398399A1 EP 90200822 A EP90200822 A EP 90200822A EP 90200822 A EP90200822 A EP 90200822A EP 0398399 A1 EP0398399 A1 EP 0398399A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread presentation
- eccentric
- elements
- shaft
- presentation element
- 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.)
- Ceased
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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
- D03D47/34—Handling the weft between bulk storage and weft-inserting means
- D03D47/38—Weft pattern mechanisms
Definitions
- This invention concerns a device for presenting weft threads on weaving machines, in particular rapier weaving machines and similar machines, where several weft threads corresponding to a desired weaving pattern are presented into the path of the picking device, for instance the gripper.
- the device 1 As shown in figs. 2 to 5 the device 1 according to the present invention consists essentially of the combination of a number of thread presentation elements 2 which move to and fro, an eccentric 6 per thread presentation element 2 which through its rotation, provides the to and fro displacement A of the cooperating thread presentation element 2; rotating drive elements 7; clutch devices 8, consisting of friction clutches, which can be activated or deactivated in order to couple the eccentrics 6 to the rotating drive elements 7 respectively and control means 9 which direct the clutch devices 8.
- the rotating drive elements 7 consist essentially of a shaft turning to and fro over a certain angle.
- the angle at which the turning takes place, is set preferably at 180 degrees.
- the clutch devices 8 per thread presentation element 2 consist essentially of a disc 19 freely revolving round the shaft 7 upon which the eccentric 6 concerned is fastened and an electromagnet 20 fixed to the shaft 7.
- the disc 19 is borne on shaft 7 by means of a bushing 21 or similar device.
- the electromagnets 20 of the respective clutch devices 8 each consist of an inner core 22, fixed to the shaft 7, an outer core 23 and with in between a solenoid 24 which is activated at the correct moments by the control means 9.
- the discs 19 and 25, situated on either side, are attracted to the cores 22 and 23 such that the eccentric 6 starts to rotate in conjunction with the turning of shaft 7.
- connection between an eccentric 6 and the associated thread presentation element 2 consists of a ring 28 which is mounted around the eccentric 6 and upon which is fastened the thread presentation element 2.
- a seating 29 is provided within which the ring 28, rotatable about the eccentric 6, is held. The ring 28 is locked against turning by means of blocking means 30.
- Device 1 is therefore fitted with flexible means 35 which force each thread presentation element 2 in the correct sense of rotation.
- an arm 36 is hinged to ring 28 and coupled at its free end 37 to a second arm 38, which in turn is hinged by one end 39 to frame 40.
- the flexible means 35 consist of springs, such as compression springs 41 and 42 which work laterally on arm 38, such that the resultant of the force applied on both sides is zero when the eccentric 6 is found in its highest and lowest positions respectively, i.e. when the thread presentation element 2 in question is in its highest and lowest position.
- Locking means 43 are also provided which stop the eccentrics 6 from moving round freely when their positions correspond to the highest and lowest positions of the thread presentation elements 2 in question, as well as in the disengaged position.
- these locking means 43 preferably consist of plate springs 44 which exhibit at their free end a recess or seating 45, which act as seatings for projections or elements which are displaced on turning the rings 28, as is the case with the V-form cast free-ends 46 of the arms 38. This gives the advantage that the thread presentation elements 2 can be locked in their highest and lowest positions without the need for traditional stops having to be foreseen for this purpose.
- the major advantage of this invention is that the on and off switching of the clutch devices 8 is not critical, in other words the moments at which these clutch devices need to be activated or deactivated are not linked to precise moments in the weaving process, but do however need to fall within certain tolerance limits.
- the first reason is that use is made of friction clutches for the clutch devices 8, which, as is known, can be activated at any time.
- the thread presentation elements 2 pass through straight guide pieces 50, where a movable or hinged coupling 51 is positioned between the arm 47, linked via the ring 28, and the thread presentation element 2.
- This coupling 51 can, as shown in fig. 12, consist of an arm, or alternatively be formed by a cable or suchlike.
- Use is made here preferably of a hinged spacer 52 which also fulfils the role of blocking means.
- Flexible means 35 and locking means 43 are naturally also provided.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Woven Fabrics (AREA)
- Looms (AREA)
Abstract
Device for presenting weft threads on weaving machines, with the characteristic that it consists essentially of a combination of a number of thread presentation elements (2), which move to and fro; per thread presentation element (2) an eccentric (6), which through its rotation can provide the to and fro displacement (A) of the associated thread presentation element (2); rotating drive elements (7); clutch devices (8), consisting of friction clutches, in order to couple the eccentrics (6) with the rotating drive elements (7); and control means (9) which direct the clutch devices (8).
Description
- This invention concerns a device for presenting weft threads on weaving machines, in particular rapier weaving machines and similar machines, where several weft threads corresponding to a desired weaving pattern are presented into the path of the picking device, for instance the gripper.
- Generally established devices for presenting weft threads on weaving machines consist of continuously revolving cams and cooperating cam followers, which use locking means, set either on or off, to couple the thread presentation elements to the cam followers during certain periods. Such devices are, amongst others, known from European patent application No. 290.788. These devices suffer from the disadvantage that the coupling between the cam followers and the thread presentation elements must take place at precise moments in time, given that the coupling can only work at certain positions of the cam followers. A further disadvantage of these devices is that they comprise a high number of stops and other cooperating elements, which are highly sensitive to wear and which are also relatively noisy due to the pushing of these cooperating elements on the stops.
- The present invention is intended as a device without the above-mentioned disadvantages, in other words a device with better dynamic behaviour, which means less wear as well as producing less or even no noise, and for which the moment of clutching is less critical.
- For this purpose, the invention concerns a device for presenting weft threads, characterized in that it consists essentially of the combination of a number of thread presentation elements moving to and fro; per thread presentation element an eccentric which through its rotation provides the to and fro displacement of the associated thread presentation element; rotating drive elements; clutch devices, consisting of friction clutches, which can be activated or deactivated in order to couple the eccentrics with the rotating drive elements and control means which direct the clutch devices.
- In order to explain better the characteristics of the invention, by way of example only and without being limitative in any way, the following preferred embodiments are described with reference to the accompanying drawings, where:
- fig. 1 shows a weaving machine which employs a device according to the invention;
- fig. 2 shows a device according to the invention;
- fig. 3 shows a cross-section that basically corresponds to the line III-III in fig. 2;
- fig. 4 shows the part denoted as F4 on fig. 3 to a larger scale;
- figs. 5 and 6 show cross-sections along lines V-V and VI-VI in fig. 3 respectively;
- fig. 7 shows a cross-section along line VII-VII in fig. 6;
- figs. 8, 9, and 10 show the device in different positions according to fig. 2;
- figs. 11 and 12 show variants of the device.
- Fig. 1 shows a gripper weaving machine which uses the
device 1 according to the invention. Thisdevice 1 directs a number ofthread presentation elements 2, such that the weft threads 3 can be respectively presented into the path of thefeed gripper 4, in order to insert the different colours or sorts of weft threads in the right order into theshed 5, corresponding to the weaving pattern. - As shown in figs. 2 to 5 the
device 1 according to the present invention consists essentially of the combination of a number ofthread presentation elements 2 which move to and fro, an eccentric 6 perthread presentation element 2 which through its rotation, provides the to and fro displacement A of the cooperatingthread presentation element 2; rotatingdrive elements 7;clutch devices 8, consisting of friction clutches, which can be activated or deactivated in order to couple theeccentrics 6 to the rotatingdrive elements 7 respectively and control means 9 which direct theclutch devices 8. - The
thread presentation elements 2 consist, in a known way, of arms or needles which are equipped withthread eyes 10 at their free ends, through which the weft threads 3 are respectively guided. It is known that, according to a variant, thread clips could be used instead of thread eyes. - In the embodiment according to figs. 2 to 5, the rotating
drive elements 7 consist essentially of a shaft turning to and fro over a certain angle. The angle at which the turning takes place, is set preferably at 180 degrees. - The to and fro turning motion of the
shaft 7 can indeed be done by any suitable means. Preferably a means such as shown in figs. 3, 6 and 7 is used, by which agear 11 is mounted on theshaft 7, which is powered by anoscillating element 13, moving around ashaft 12, in the form of a segment of a circle, whose spherical surface cooperates withgear 11 of theshaft 7, this being done, for example, by means of aring gear 14 which works ongear 11. Theelement 13 is turned to and fro by means of acam 15. Thiscam 15 consists preferably of a slotted cam in the form of an eccentric. Apin 16 is mounted in theelement 13 and fits in theslot 17 of thecam 15. The eccentricity of thecam 15 and the radius of thering gear 14 are so chosen that the turning movement ofelement 13 produces a given amplitude, such thatgear 11 is turned to and fro through precisely 180 degrees with each revolution of thedrive shaft 18 of thecam 15. Thisdrive shaft 18 is coupled to the main shaft of the weaving machine and preferably turns as fast as the main shaft. As a result, thethread presentation element 2 can be moved from its highest to its lowest position and from its lowest to its highest position respectively, with each revolution of the main shaft of the weaving machine. - The said
clutch devices 8, which link theeccentrics 6 to theshaft 7 respectively, preferably consist of electro-magnetically driven friction clutches, as shown in figs. 3 and 4. Theclutch devices 8 for the respectivethread presentation elements 2 are, like theeccentrics 6 and thethread presentation elements 2, mounted next to each other on the end of theshaft 7, which results in a very compact arrangement. - As shown in the detail of fig. 4, the
clutch devices 8 perthread presentation element 2 consist essentially of adisc 19 freely revolving round theshaft 7 upon which the eccentric 6 concerned is fastened and anelectromagnet 20 fixed to theshaft 7. Thedisc 19 is borne onshaft 7 by means of a bushing 21 or similar device. Theelectromagnets 20 of therespective clutch devices 8 each consist of aninner core 22, fixed to theshaft 7, anouter core 23 and with in between asolenoid 24 which is activated at the correct moments by the control means 9. - In order to fully lock the magnetic field, via the
cores disc 19, when activating thesolenoid 24, asecond disc 25 is mountedopposite disc 19 which revolves around theshaft 7 also by means of a bushing 21 or similar device. - On energizing an
electromagnet 20, thediscs cores shaft 7. - In order to ensure that the
discs cores clutch devices 8 can be fitted withflexible means 26 which pull thediscs plate springs 26, which are fastened on the one hand to thediscs 25 and on the other hand, for example, to the eccentric 6. In order to avoid the disadvantages of remanent magnetism, a contact-breaker 27 is built into the magnetic field, at theouter core 23, consisting for instance of a copper inclusion. - As shown in figs. 2 and 3 the connection between an eccentric 6 and the associated
thread presentation element 2 consists of aring 28 which is mounted around the eccentric 6 and upon which is fastened thethread presentation element 2. Around the circumference of the eccentric 6, aseating 29 is provided within which thering 28, rotatable about the eccentric 6, is held. Thering 28 is locked against turning by means of blocking means 30. - Each
thread presentation element 2 preferably consists of an arm which is directly fixed to thesaid ring 28 and which is preferably constructed as a whole with it. The blocking means 30 are formed in this case by two supports orguide pieces thread presentation elements 2 pass. - In order that the
thread eyes 10 should follow almost straight paths during displacement A of thethread presentation elements 2, thesides thread presentation elements 2 are made with profiled edges. This gives the advantage that the different weft threads will not become tangled with one another. It is clear however that when an eccentric 6 makes a movement V as shown in fig. 2, i.e. on the left-hand side of the circle, measures will have to be taken to ensure thatthread presentation element 2, via itsside 33, will remain in contact withsupport 31. Analog measures will have to be taken to ensure that when the eccentric 6 makes a movement W as shown in fig. 2, i.e. to and fro on the right-hand side of the circle,side 34 is kept in contact withsupport 32, the straight path advantage being otherwise lost.Device 1 is therefore fitted withflexible means 35 which force eachthread presentation element 2 in the correct sense of rotation. For this purpose, anarm 36 is hinged to ring 28 and coupled at itsfree end 37 to asecond arm 38, which in turn is hinged by oneend 39 to frame 40. Theflexible means 35 consist of springs, such ascompression springs arm 38, such that the resultant of the force applied on both sides is zero when the eccentric 6 is found in its highest and lowest positions respectively, i.e. when thethread presentation element 2 in question is in its highest and lowest position. - Locking means 43 are also provided which stop the
eccentrics 6 from moving round freely when their positions correspond to the highest and lowest positions of thethread presentation elements 2 in question, as well as in the disengaged position. As shown in fig. 2 these locking means 43 preferably consist ofplate springs 44 which exhibit at their free end a recess orseating 45, which act as seatings for projections or elements which are displaced on turning therings 28, as is the case with the V-form cast free-ends 46 of thearms 38. This gives the advantage that thethread presentation elements 2 can be locked in their highest and lowest positions without the need for traditional stops having to be foreseen for this purpose. - Given a suitable arrangement of the components, as in fig. 2, only one locking means 43 needs to be present per
thread presentation element 2, as it ensures the locking of the eccentric 6 and thering 28 both in the highest and lowest position of thethread presentation element 2. - It should be moreover noted that in the case where the
springs springs free end 46 into theseating 45. In this case the locking means 43 in the form of aseating 45 and a cooperatingfree end 46 are not strictly necessary given that these flexible means 35 themselves serve as lockings. - The working of the device can be simply deduced from the different positions as shown in figs. 2, 8 and 9. For the sake of clarity, only one
thread presentation element 2 is shown in each figure. Fig. 2 shows the eccentric 6 and thethread presentation element 2 in their highest position. When athread presentation element 2 needs to be lowered, the associatedelectromagnet 20 is energized, which causes the accompanyingdiscs cores shaft 7. Given thatelement 13 is turned downwards, as shown in fig. 8, the eccentric 6 is also moved downwards through the half circle, as shown by arrow V. Thefree end 46 of thearm 38 is freed from theseating 45 of theplate spring 44. Because thespring 41 clamps and thespring 42 releases, thering 28 is forced in the direction of arrow F, causing the profiledside 33 to slide along theguide piece 31, such that thethread eye 10 describes an almost straight displacement A. - When, as in fig. 9, the
oscillating element 13 is in its lowest position, the eccentric 6 is also in its lowest position. Thethread presentation element 2 is also then in its lowest position and thus presents the weft thread 3 in question in the path of thefeed gripper 4. In this position one notes that thefree end 46 of thearm 38 has relocated itself in theseating 45 and that thesprings electromagnet 20 is then de-energized, thethread presentation element 2 remains in its lowest position. Further turning of the eccentric 6 by possible frictional forces which may develop in thebushing 21, are thus avoided by the locking means 43. - On turning
element 13 upwards again, at least when the saidelectromagnet 20 is de-energized, thethread presentation element 2 remains in its lowest position. When thereafter, as shown in fig. 10, theelectromagnet 20 is re-energized when theelement 13 starts its downward turn, the eccentric 6 will be moved back upwards as shown by arrow W. At that instant theside 34 makes contact with thesupport 32, this contact being guaranteed as thespring 41 releases and thespring 42 clamps. - From the above, it is clear that the major advantage of this invention is that the on and off switching of the
clutch devices 8 is not critical, in other words the moments at which these clutch devices need to be activated or deactivated are not linked to precise moments in the weaving process, but do however need to fall within certain tolerance limits. - This advantage is essentially for three reasons.
- The first reason is that use is made of friction clutches for the
clutch devices 8, which, as is known, can be activated at any time. - The second reason is due to the use of locking means 43 as shown in fig. 2, which ensure that, if something is coupled or uncoupled either too early or too late, the
free end 46 is still forced into its correct position by the shape of theseating 45. - The third reason is due to the influence of the flexible means 35 on the neutral position of the
arm 38. When thesprings arm 38 will be automatically forced into its position as shown in fig. 2 by thesprings - It is clear that the factors which lie at the basis of the aforementioned three reasons could be either singly or all present.
- It is clear that, according to a variant, the rotating drive elements could also consist of a
shaft 7 which keeps on turning and preferably comes to a momentary halt at each rotation of 180 degrees. - Fig. 11 shows a schematic variant in which the blocking means 30 in the form of
supports rings 28 and thethread presentation elements 2 each consist here of anarm 47 which is mounted on thering 28 and which is coupled on its free end to arotating lever 49, which moves about a fulcrum 48 mounted to the frame, and which carries thethread presentation element 2 at its free end. Thislever 49 also fulfils the function of blocking means. It is clear that flexible means 35 and locking means 43 are also provided. - In another variant the
thread presentation elements 2 pass throughstraight guide pieces 50, where a movable or hingedcoupling 51 is positioned between thearm 47, linked via thering 28, and thethread presentation element 2. Thiscoupling 51 can, as shown in fig. 12, consist of an arm, or alternatively be formed by a cable or suchlike. Use is made here preferably of a hingedspacer 52 which also fulfils the role of blocking means. Flexible means 35 and locking means 43 are naturally also provided. - The present invention is in no way limited to the embodiments described and shown in the drawings; on the contrary , such a device for presenting weft threads can be made in various variants and dimensions while still remaining within the scope of the invention.
Claims (22)
1. Device for presenting weft threads on weaving machines, characterized in that it consists essentially of a combination of a number of thread presentation elements (2), which move to and fro; per thread presentation element (2) an eccentric (6), which through its rotation can provide the to and fro displacement (A) of the associated thread presentation element (2); rotating drive elements (7); clutch devices (8), consisting of friction clutches, in order to couple the eccentrics (6) with the rotating drive elements (7); and control means (9) which direct the clutch devices (8).
2. Device according to claim 1, characterized in that the clutch devices (8) consist of electromagnetically activated friction clutches.
3. Device according to claim 2, in which the drive elements consist of a rotating shaft (7), characterized in that the clutch devices (8) consists essentially of discs (19) which revolve freely around this shaft (7), and upon which the said eccentrics (6) are fastened or of which they form a part, and electromagnets (20) fixed to the shaft (7) which once activated radially attract the discs (19) such that they turn in conjunction with the aforementioned shaft (7).
4. Device according to claim 2 or 3, characterized in that the clutch devices (8) feature two discs (19, 25) per thread presentation element (2) which are in turn located respectively on each side of the electromagnets (20), whereby flexible means (26) are located, directly or indirectly between both elements which pull the discs (19, 25) apart.
5. Device according to claim 4, characterized in that the said flexible means consist of a plate spring (26), which essentially extends radially to the shaft (7) over which the discs (19, 25) turn.
6. Device according to one of the above claims, characterized in that it has locking means (43) which can hold each eccentric (6) in its two positions, which correspond to the extreme positions of the thread presentation elements (2).
7. Device according to claim 6, characterized in that the locking means (43) per thread presentation element consist essentially of a profiled plate spring (44) which has a seating (45) and an element (46) that displaces itself over the plate spring (44) as the eccentric (6) moves and which cooperates with the seating (45) whenever the eccentric (6) in question is in one of its positions whereby the associated thread presentation element (2) stands in one of its extreme positions.
8. Device according to claim 7, characterized in that the connection between an eccentric (6) and a thread presentation element (2) consists of a ring (28) which is mounted around the eccentric (6) and to which the thread presentation element (2) is fastened, and that the element which moves over the plate spring (44), consists of a rotatable arm (38) which via its to and fro moving free end (46) comes into contact with the plate spring (44), and which is connected to the said ring (28) by means of an arm (36).
9. Device according to one of the above claims, characterized in that it has flexible means (35) which can force each respective eccentric (6) into its two positions, which correspond to the two extreme positions of the associated thread presentation element (2).
10. Device according to claim 9, characterized in that the flexible means (35) per thread presentation element (2) consist of two springs (41, 42), whereby these springs (41, 42) work respectively along both sides on an hinged arm (38) which is linked at its free end (37), directly or indirectly, with the associated thread presentation element (2), whereby the springs (41, 42) are so mounted that the thread presentation element (2) in question takes up one of its two extreme positions when the whole arrangement is in equilibrium.
11. Device for presenting weft threads on weaving machines, characterized in that it consists essentially of a combination of a number of thread presentation elements (2), which move to and fro; per thread presentation element (2) an eccentric (6), which through its rotation can provide the to and fro displacement (A) of the associated thread presentation element (2); rotating drive elements (7); electromagnetically activated friction clutches, in order to couple the eccentrics (6) with the rotating drive elements (7); control means (9) which direct the electromagnetically activated friction clutches; locking means (43) which can hold each eccentric (6) in its two positions, which correspond to the extreme positions of the thread presentation elements (2); and flexible means (35) which can force each eccentric (6) respectively into its two positions, which correspond to the two extreme positions of the associated thread presentation element (2).
12. Device according to one of the above claims, characterized in that the rotating drive elements consist essentially of a shaft (7) turning to and fro over a certain angle.
13. Device according to claim 12, characterized in that the shaft (7) is powered by an oscillating element (13), moving around a shaft (12), in the form of a segment of a circle, whereby this element (13) is coupled to the said shaft (7) by its spherical surface.
14. Device according to claim 13, characterized in that the oscillating element (13) is turned to and fro by means of a cam (15).
15. Device according to claim 12, 13, or 14, characterized in that the shaft (7), moving to and fro, is turned through 180 degrees.
16. Device according to one of the above claims, characterized in that the rotating drive elements consist essentially of a uni-directional moving shaft which comes to a momentary halt after each turn of 180 degrees.
17. Device according to one of the above claims, characterized in that the connections between the eccentrics (6) and the thread presentation elements (2) each consist of a ring (28), which is mounted around the eccentric (6) in question and to which the thread presentation element (2) is fastened, whereby blocking means (30, 49, 52) are provided which prevent the ring (28) from turning.
18. Device according to claim 17, characterized in that the thread presentation elements (2) consist of arms which lie directly on the respective rings (28).
19. Device according to claim 17 or 18, characterized in that the blocking means (30) consist of supports (31, 32) through which the thread presentation elements (2) pass.
20. Device according to claim 19, characterized in that the sides (33, 34) of each thread presentation element (2) feature a profiled shape and that the device (1) is fitted with flexible means (35) which as a function of the position of each eccentric (6), press the cooperating thread presentation element (2) either with the one side (33) or the other side (34) against one of the supports (31, 32), such that the thread presentation elements (2) describe an almost straight displacement (A) at their free ends.
21. Device according to claim 17, characterized in that the thread presentation elements (2) are carried on rotating levers (49), which move about a fixed fulcrum (48), whereby these said levers (49) are coupled respectively to the aforementioned rings (28) by means of intermediate arms (47).
22. Device according to claim 17, characterized in that the thread presentation elements (2) are movable both up and down along straight guide pieces (50) and that the fixations of the thread presentation elements (2) on the respective rings (28) are formed by an arm (47), fixed to the ring (28), and by a coupling (51) which extends between the arm (47) and the associated thread presentation element (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE8900531 | 1989-05-18 | ||
BE8900531A BE1003978A3 (en) | 1989-05-18 | 1989-05-18 | DEVICE FOR PRESENTING weft threads in weaving machines. |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0398399A1 true EP0398399A1 (en) | 1990-11-22 |
Family
ID=3884165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90200822A Ceased EP0398399A1 (en) | 1989-05-18 | 1990-04-05 | Device for presenting weft threads on weaving machines |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0398399A1 (en) |
BE (1) | BE1003978A3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0676493A1 (en) * | 1994-04-05 | 1995-10-11 | PANTER S.r.l. | Weft yarn presentation device for looms |
EP0896075A2 (en) * | 1997-08-07 | 1999-02-10 | NUOVA VAMATEX S.p.A. | Weft yarn presenting device for weaving looms |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH450315A (en) * | 1967-05-09 | 1968-01-15 | Rueti Ag Maschf | Arrangement for the optional feeding of weft threads of various types to a thread take-over point |
GB2099863A (en) * | 1981-06-09 | 1982-12-15 | Saurer Ag Adolph | Weft selectors |
EP0290788A2 (en) * | 1987-05-14 | 1988-11-17 | Picanol N.V. | Device for the selective movement of the feed-fingers in looms |
-
1989
- 1989-05-18 BE BE8900531A patent/BE1003978A3/en not_active IP Right Cessation
-
1990
- 1990-04-05 EP EP90200822A patent/EP0398399A1/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH450315A (en) * | 1967-05-09 | 1968-01-15 | Rueti Ag Maschf | Arrangement for the optional feeding of weft threads of various types to a thread take-over point |
GB2099863A (en) * | 1981-06-09 | 1982-12-15 | Saurer Ag Adolph | Weft selectors |
EP0290788A2 (en) * | 1987-05-14 | 1988-11-17 | Picanol N.V. | Device for the selective movement of the feed-fingers in looms |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0676493A1 (en) * | 1994-04-05 | 1995-10-11 | PANTER S.r.l. | Weft yarn presentation device for looms |
EP0896075A2 (en) * | 1997-08-07 | 1999-02-10 | NUOVA VAMATEX S.p.A. | Weft yarn presenting device for weaving looms |
EP0896075A3 (en) * | 1997-08-07 | 1999-06-16 | NUOVA VAMATEX S.p.A. | Weft yarn presenting device for weaving looms |
Also Published As
Publication number | Publication date |
---|---|
BE1003978A3 (en) | 1992-07-28 |
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