Method and device for connecting two ends of yarn
专利摘要:
one . The method of connecting the two ends of the yarn, which consists in securing each yarn in two places, unwinding it in the area between the points of fixation, fluffing in this area by a width that exceeds the diameter of the yarn, cutting off the ends of the yarn, feeding the bundle of raspup; between the fused fibers of the other yarn and twisting of the joining section, differs with the aim, in order to increase the strength of the joint, before applying a bundle of the fluff fibers of one yarn between the fluff fibers of the other yarn The fibers of the fiber are given a flat drop-shaped shape and are positioned one- over the other, orienting them so that the end of one beam is marked above the most distant part of the other beam, and the supply of a beam of fluffed fibers is one. The yarn between the fluff fibers of the other yarn is realized by the action of air currents perpendicular to the orientation planes of the beams. 2. Method POP.1, distinguishing itself with the fact that imparting drop-shaped fibers to the tuft of tufted fibers is carried out by air streams directed along the planes of orientation of the beams. 3. A device for carrying out the method according to Claim 1, containing installations S with the possibility of relative (Y) moving and contacting with one another two box-shaped blocks, on the circumferential planes of which the connected longitudinal grooves of variable cross section are made connectable yarn ends, means for feeding bundles of split fibers of one yarn between fibers of the other yarn and for cutting 4 of the yarn ends, except that THO1 box-shaped blocks are connected to a source of compressed air and each of them has the distribution channel and the socket, which are perpendicular to the groove and perpendicular to it, are connected to each other by means of a longitudinal channel, a nozzle connected to the distribution channel, and a conical rod placed in the socket, the height of which faces the groove, and the groove includes two intersecting sections, tapering from the intersection plane, with the nozzles arranged along the slots on the 公开号:SU1082314A3 申请号:SU803008198 申请日:1980-11-21 公开日:1984-03-23 发明作者:Цурхер Эрвин;Негати-Хинди Ги;Пуйол Карлос 申请人:Фоменто Де Энверсьон Эндюстриаль С.А. (Фирма); IPC主号:
专利说明:
the positive lateral sides of the blocks, the sockets are displaced one relative to the other along the length of the groove, and the means for cutting off the ends, yarns are placed on the sides of the blocks. The invention relates to the textile industry and relates to a method and apparatus for connecting the ends of yarns. A yarn connection is a common operation, particularly in winding raspberries. It is also present in the hall. Weaving production, as well as in some processes of non-recovered thread. For a long time, this operation is carried out by tying the two ends of the yarn together so that the defect then manifests itself in the fabric. Solutions have already been proposed for replacing knots, Christmas trees with invisible joints as close as possible to the thread. The fundamental difficulty of such decisions lies in obtaining sufficient strength of the yarn for stretching. Indeed, in the case of a knot, strength almost corresponds to the strength of the yarn, whereas in the case of an invisible joint in which the threads are mutually twisted, this strength can hardly be equal to strength. yi However, a solution of this type may be acceptable if the strength of the joint is at least equal to 40% of the initial strength of the thread. Methods are known in which the loose ends of the yarn to be connected are placed in a chamber and create a turbulent outflow of air designed to weave the fibers of both ends in such a way as to create a zone of joining of two strands. The appearance of such a joint is not lousy in the appearance of the thread and its strength is slightly higher than half the initial strength of the thread Ll3. The closest to the invention to the technical essence and the achieved result is the method of joining the two ends of the yarn, consisting in securing each yarn in unwinding it in the section between the fixing points of the fluffing in this region by a width exceeding the diameter of the yarn, cutting off the ends of the yarn, feeding the bundle of fluff fibers of one yarn between the bundled fibers of the other yarn and twisting and the joining section 4J. Closest to the invention is a device for carrying out the method, comprising two box-shaped units installed with relative movement and contacting one another, on which planes facing one another are made of variable cross-section grooves yarn ends, means for feeding tufts of pacnyiieHHbHs fibers from one yarn between fibers from another yarn and for cutting the ends of yarn 4J. This method and device helps to get good results in accordance with the thickness of the yarn, as well as with the material of this yarn. With some types of yarn, namely, relatively thick yarn formed by synthetic fibers, some difficulties arise due to the density of the fibers, which makes their mutual penetration difficult, as well as the residual twisting of the fibers. The purpose of the invention is to eliminate the disadvantages of these solutions and to achieve the possibility of making practically invisible compounds with increased strength, namely for thick yarn made from synthetic fibers. This goal is achieved in that according to the method of joining the two ends of the yarn, consisting in securing each yarn in two places, unwinding it in the area between the attachment points, fluffing in this area by a width exceeding the diameter of the yarn, cutting the ends of the yarn, Lodache bundle of fluff fibers of one yarn between fluff fibers of another yarn and twisting the connected section, before applying a bundle of pacnymenHhtx fibers of one yarn between fluff fibers of the other yarn to the fluff bundles of yarn fibers They have a flat drop-shaped shape and place them one above the other, the reference point for the TTC, that the end of one bundle is placed over the widest part of the other bundle, and the flow of fluff of fluff fibers from one yarn between the bunched fibers of the other yarn does not affect air flow, perpendicular plane orientation of beams. Making the tuft of tufted fibers a drop-like shape of an incipient, is projected by air streams directed along the planes of orientation of the beams. This goal is also achieved by a device containing two box-shaped blocks installed with the possibility of relative movement and contact with each other, on which planes facing one another are made of alternating longitudinal grooves of variable cross section for connected ends, means for feeding tufts of fluffed fibers of one the yarn between the fibers of the other yarn and for cutting the ends of the yarn, the box-shaped blocks are connected to a source of compressed air and each of them has a slotted and perpendicular there is a distribution channel and a socket connected to each other by means of a longitudinal channel, a nozzle connected to the distribution channel and a conical h rod located in the nest, the apex of which is o6pav; eHa to the groove, and the groove includes two intersecting areas narrowing from the intersection plane , while the nozzles are located along the grooves on opposite sides of the blocks, the sockets are displaced one relative to the other along the groove length, and the means for cutting the ends of the yarns are placed on the lateral sides of the blocks. Fig. 1 schematically shows an embodiment of a device for carrying out the method (a perspective view of the main elements of the device) in Fig. 2 - enlarged sectional detail figure 1; figure 3 - section aa in figure 2; figure 4 - timing diagrams. and, respectively, 23 and passed, adjacent to the box-shaped unit 32 and, respectively, 33. Each block 32 and 33. 144 The device has a housing 1 which contains two supports 2 and 3 mounted rotating in the housing 1 by means of two hollow shafts 4 and 5. These two supports 2 and 3 are connected to each other by means of a pull rod 6, the ends of which are pivotally connected to the supporting shafts 7 and 8 parallel to the hollow shafts 4 and 5. The shaft 8 is connected to the rod 9 of the power cylinder 10, designed to rotate the supports kinematically connected by the pull 6 , around the axes of the hollow shafts 4 and 5 so that tit support from the position shown in FIG. 1, to a position in which the supports 2 and 3 are elongated. Both hollow shafts 4 and 5 allow passage to two other shafts 11 and 12, which extend along the rear of housing 1. Each shaft 11 and 12 is rigidly connected with gear 13 and 14 respectively. These gears are connected by a toothed belt 15. The front end of each shaft 11 and 12 passes through one of the supports 2 and 3, respectively, and is rigidly connected to the bevel gear 16 and 17, respectively, coupled to two bevel gears 18 and 19 respectively. Each bevel gear 18 and 19 are rigidly connected to spindle 20 and respectively 21, mounted between two side parallel The walls 2a, 2b and respectively Za, Zb of the supports 2 and 3. Each spindle 20 and 21 terminates with a radially cut disk 22 and respectively 23. The rear end of the shaft 11 is rigidly connected to the second gear 24 engaging a rail 25 rigidly connected to the rod 26 of the power cylinder 27. This drive mechanism 24-27 serves to control the rotation of spindles 20 and 21 in the opposite direction to each other, with shyindel 21 being driven by a belt 15 connecting gears 13 and 14. Two suction pipes 28 and 29 and respectively 30 and 31 are fixed motionless on to 1 each and the other cTopoHij from each support 2 and 3 respectively. These pipes are connected to the fan inlet and arranged in pairs so that the thread, tension between each pair of suction pipes, rests on the edge of the disks 22 and is rigidly connected to support 2 and respectively 3. One of these blocks is depicted in Figures 2 and 3. Assuming that they are identical, we describe one of them. Each block is made of insulating material, for example, from plastics. Its upper plane has a central groove 34, the dyo of which serves as a support surface for spreading the fibers forming the beard of the end of the yarn to be joined. The depth of this slot is about 0.3 mm. The surface of the block 32, surrounding the groove 34, is covered with a layer of plastic 35 more flexible than the plastic of the block, and is intended as a hermetic seal when both blocks are in the position shown in Lig.2. The thickness of the layer is 35 of the order of 0.1 mm. This unit 32 contains an inlet channel 36 connected to an air source 37 (FIG. 1) capable of being heated by an electrical resistance 38. The inlet channel 36 communicates with a distribution channel 39, which extends at the level of the supporting surface, which bounds the bottom of the groove 34, forming a nozzle 40 through a slit, the length of which corresponds to the width of the groove 34, one of the thresholds 41 of which is parallel to the bottom of n for 34 and supports the jet of nozzles 40 along the supporting surface of the groove FIG. 3 shows that the groove width is constant. If you look from the exit of the nozzle 40, you can see that it expands by about 1 / 4-1 / 5 of its length by about 40% of its initial width, and then it gradually turns to that initial width over the rest of its length. The supporting surface of the bottom of the groove 34 in its part corresponding to the area where this groove expands at the exit of the nozzle 40 has an opening that corresponds to the cylindrical seat 42, which passes through the block 32 perpendicular to the groove 34 42 carries a ground rod 43, the upper end of which ends with a cone 44, the top of which extends directly to the levels) of the bottom of the groove 34. A channel 45 centered along the axis of the cone 44, located approximately 1/3 of the height of this cone from its base 4 6 reports cylindrical socket 42 with distribution Tel'nykh channel 39. The unit 32 further comprises a series of electrical conductors 46 disposed perpendicularly to the groove 34 and spaced in the longitudinal direction. These electrical conductors are located near the support surface of the bottom of the groove 34 and are embedded in the plastic of the block 32 in such a way that the dielectric separates these electrical conductors 46 from the supporting surface. These conductors are connected to an electrostatic generator. Between the four conductors 46 from the open end of the groove 34, three very thin channels 47 with a diameter of 0.25 mm, which are connected to the source 37 of compressed air, exit from the bottom surface of the bottom of the groove 34. Each block 32 and 33 has on its side, adjacent to the end of the groove 34, a blade 48 and 49, respectively, while the second blade 50 and 51, respectively, is fixed on the housing 1 on the respective trajectories of the described blades 48 and 49 when moving supports 2 and 3 from the position shown in fig. 1, to a position in which the blocks 32 and 33 are brought one to the other. Two connected strands are supplied each opposite to two suction tubes 28, 29 and respectively 30, 31 and all four are connected to the inlet of the fan so that the yarn areas between the suction tubes 28, 29 and respectively 30, 31 are pulled on and relied on the disks 22 and 23, respectively. This moment is denoted as t diagram (figure 4). In this action diagram, O and 1 are indicated, and O corresponds to the non-operating or initial position of the organ performing the action, and I is the position in which the organ is retracted from its non-operating or initial position. From the moment tQ to the moment t, the action c corresponds to the rotation of the disks 22, 23 rigidly connected with the spindles 20, 25. The length of this rotation, the corresponding radial slits of the disks 22.23, fit opposite the threads tensioned between the pipes 28, 29 and, respectively, 30, 31 and periphery-supporting discs 22, 23 in such a way that these threads are pushed into these radial slots and twist around ptsdeldey 20, 21, causing the promotion of threads between the pipes 28 and 30, respectively, and the disks 22 and respectively 23. At the time t begins blowing air through the nozzle 40 (action b), with This fuzzy overlay is applied to the bottom surface of the groove 34, thus exposed to this jet that removes the loose fibers of the strand wrapped around each spindle 20 and 21. The air blown in is heated by the heater 38. This temperature in the order of 60-90 C, it is intended to eliminate the residual curling of the fiber in order to decompose the fiber bead on the support surface of the bottom of the groove 34 and to keep these fibers remaining. were adjacent to the plane of this surface. In fact, the fibers that form the beard at the end of the spun strand partially deform, after spin-up, the deformation that causes them to twist, and therefore cannot be spread out on the surface. The hot air allows the deformation of the fibers to be completely or partially eliminated. In addition, the outflow of air created by the nozzle 40, adjacent to the bottom of the groove 34, spreads the small bead fluffed from the thermally treated fibers along the bottom of the groove 34. The secondary air stream created through the channel 45, located between the distribution channel 39 and the socket 42, is directed to the cone 44 and deflects the flow of air from the nozzle 40. Its purpose is to create an expansion of the main jet and a corresponding expansion of the bead of the fibers. Then the side walls of the groove 34 taper in the direction of the open end of this groove and cause the flow and fibers to seal. Thus, the bead of fibers, expanded along the bottom of the groove 34, has the shape of a drop, which is important for the quality of the connection. To improve the holding of the fiber on the support surface of the bottom of the groove 34 at time tj, the conductors 46 supply voltage (action c) from the electrostatic generator, creating a field between these conductors 46 and the rest of the device, performing the role of mass potential. It is necessary that the thickness of the dielectric separating these conductors from the bottom of the groove 34 be significant, otherwise the fibers cannot be electrically charged. In this example, the dielectric thickness | about 0.3 mm. Alternatively, the same result can be achieved pneumatically by suctioning air through the channels 47. From the moment t. up to the moment tc, the outflow of air through the nozzle 40 and the channel 45 (action b) stops and from tg to t blocks 32 and 33 are brought one to another (action c1) in the position shown in figure 2, by rotating the supports 2 and 3 under the action of the ram 10. During this movement, the fibers of both pins formed on blocks 32 and 33 are cut off by movable blades 48 and 49 respectively, meeting with fixed blades 50 and 51 respectively during their passage. When both blocks 32 and 33 are brought in close to one to the other, both grooves 34 form one passage, open th at both ends. The ongoing thickening of the layers 35 forms a hole of approximately 0.5 mm between the bottom of each groove 34 and the corresponding thresholds 41, allowing the passage of yarn. At time t, when blocks 32 and 33 are adjacent (action d), action e, which corresponds to the supply of channels 47 with compressed air, begins. The action of the air streams created at the outlet of the channels 47 causes penetration of the fibers of the end of each barb into the layer of fibers of the other barb so as to blow them. During this operation, you can notice the importance of giving each beard a drop shape. Without this form, a part of the end fibers, injected by the channels 47, will move away from the fiber layer of the adjacent beard in such a way that these fibers do not take an effective part in the connection and come out of the thread, making the connection visible. If the layer into which the tip fibers are blown is wider than this end, the likelihood of fiber penetration into this layer will increase significantly. It is assumed that the further tension of the two barbs of the applied fibers causes a gradual deformation of the fibers arranged in a screw-like plane, and that it is the base of each barb that the S-shaped cross-section tends to occupy: it is desirable that the corresponding 9 ends of the fiber barbs be slightly displaced in the side where the pronged beard will tend to become concave and thereby embrace this end in order to ensure then that it is fully gripped by the adjacent beard. If the end of the beard was at the moment of the start of twisting in the convex part S formed in the cross section by the base of the knob at the beginning of twisting, then the end of the yarn would not be captured and would enter after the connection. In practice, the sTot result can be obtained when making a groove 34 with some asymmetry about the longitudinal axis X-X of each block 32 and 33, as shown by the dotted line 34 in FIG. Of course, the edges of the groove 34 of the block 33 form an angle of 180 C from the edge of the groove of the block 32 when these blocks are in the position shown in FIG. 2. Thus, the penetration of the end hairs of each beard into the fibers of the adjacent beard before twisting these barbs to restore the yarn at the junction is of paramount importance. In fact, without this interpenetration of the fibers of the adjacent barbs, the barbs themselves are twisted in such a way that instead of recreating the yarn structure obtained by spinning, there are two tightly twisted together masses of fibers. The strength of such a joint will be extremely low and will not resist the re-tensioning or tension that occurs when passing through the yarn feeder. At time t, the action c corresponding to the electrostatic field ceases, and at time tg the disks 22 and 23 return to their original position (action a), i.e. they are caused to rotate in the opposite direction 14 by the reverse movement of the rod 26 of the power cylinder 27. The twisting induced in each strand of the thread wound around the spindles 20, and accordingly 21 during the initial unwinding, passes into the beards, the fibers of which mutually penetrate in such a way that the structure is created at the junction extremely close to the spinning. At the same time, when the thread of the yarn is unrolled from the corresponding spindle 20 and 21, it is released from the radial slot of the disks 22 and 23, respectively. At the time tft, the actions o1 and e end, i.e. the power cylinder 10 returns the supports 2 and 3 to the position shown in Fig. 1 and the yarn tension between the suction pipes 29 and 31 can, therefore, be released from the device. The described joining process does not contain any mechanical element acting as a means of carrying out the method, and the mechanical means act only as control elements, therefore indirectly. The quality of the compound obtained, as well as the appearance, are excellent, and the strength of the compound averages about 90% of the initial strength. The method has been tested, in particular, on yarn formed from man-made fibers cut along the length of cotton fibers of the order of 40 mm, characteristic of fibers forming usually synthetic or artificial yarn. The thickness of the filaments was about 120 tex. In some cases, it may be desirable to heat up to 6090 ° C the strands of the connected yarns before they are removed from the device in order to eliminate some unwinding after the two barbs are curled. 1 381 12 233327851 FIG. 1 26 Fig.z , tff tj 6 3 FIG.
权利要求:
Claims (3) [1] 1. The method of connecting the two ends of the yarn, which consists in securing each yarn in two places, unwinding it in the section between the fixing points, expanding in this section to a width exceeding the diameter of the yarn, cutting the ends of the yarns, feeding a bundle of loose fibers of one yarn between the fluffy fibers of the other yarns and twisting of the joined section, except for the fact that, in order to increase the strength of the connection, before feeding a bundle of fluffy fibers of one yarn between fluffy fibers of another yarn to unfold bundles yarn fibers give a flat, drop-like shape and are positioned and : one above the other, orienting so that the end of one bundle is placed over the widest section of another bundle, and the supply of a bundle of fluffy fibers is one. yarn between the fluffy fibers of another yarn is carried out by exposure to air currents perpendicular to the orientation planes of the beams. [2] 2. The method according to π.1, characterized in that the giving to the bundles of fluffy fibers of a drop-shaped form is carried out by air flows directed along the orientation planes of the beams. [3] 3. The device for implementing the method according to claim 1, comprising two box-shaped units installed with the possibility of relative movement and contacting one another, on the 'facing one another planes of which conjugated longitudinal grooves of variable cross-section are made for the ends of the yarns to be joined, means for supplying loose bundles the fibers of one yarn between the fibers of another yarn and for cutting the ends of the yarns, characterized in that 1 box blocks are connected to a source of compressed air and each of them has a groove m and a distribution channel perpendicular to it and a socket connected to each other by means of a longitudinal channel, a nozzle connected to the distribution channel and a conical rod placed in the socket, the apex of which faces the groove, and the groove includes two intersecting sections, tapering from the intersection plane, this nozzle is located along the grooves on the right SU,. ”1082314 on the positive sides of the blocks, the slots are offset one relative to the other along the length of the groove, and means for cutting the ends of the yarns are placed on the sides of the blocks.
类似技术:
公开号 | 公开日 | 专利标题 SU1082314A3|1984-03-23|Method and device for connecting two ends of yarn US5251363A|1993-10-12|Method and apparatus for combining differently colored threads into a multi-colored yarn SU1447291A3|1988-12-23|Method of manufacturing yarn from at least two separate bunches of threads of thermoplastic material US3266969A|1966-08-16|Tufting process and products having tufted structures US3715878A|1973-02-13|Process for making chenille-type yarn US3339362A|1967-09-05|Method of joining strands US3061998A|1962-11-06|Bulked continuous filament yarns US2111209A|1938-03-15|Treatment of textile yarns PT778903E|2000-11-30|METHOD AND APPARATUS FOR MAKING TEXTILE ARTICLES WITH HAIR AND DERIVATIVE PRODUCTS DE2539668A1|1976-04-01|ELASTIC COMPOSITE YARN AND METHOD OF MANUFACTURING THESS US2041798A|1936-05-26|Production of artificial materials US4674271A|1987-06-23|Apparatus and process for converting a continuous multifilament yarn to a staple-like yarn US8834148B2|2014-09-16|Apparatus for the production of a turf yarn US4246308A|1981-01-20|Curled flock fabric and method for making same US3199284A|1965-08-10|Process for making yarn from a thermoplastic strip JPH0544129A|1993-02-23|Bulk-treated continuous filament yarn and on-line type interweaving method of low melting-point binder fiber US3145446A|1964-08-25|Process for producing tufted structures US3899562A|1975-08-12|Process for the production of mixed yarns US3707838A|1973-01-02|Process for the production of staple fibers US3417560A|1968-12-24|Method and apparatus for producing a semi-continuous filament yarn US3273329A|1966-09-20|Textile yarns US2244281A|1941-06-03|Cellulosic structure, apparatus and method for producing same US3120733A|1964-02-11|Process of uniting a plurality of yarns into a network structure and the resulting unitary yarn structures JP2975096B2|1999-11-10|Method and apparatus for producing a non-twisted yarn from at least two filament bundles arranged at fixed positions with respect to each other US1983326A|1934-12-04|Manufacture of artificial staple fiber
同族专利:
公开号 | 公开日 AT3019T|1983-04-15| EP0029808B1|1983-04-13| ES497052A0|1982-01-16| JPS5688073A|1981-07-17| IN154424B|1984-10-27| BR8007343A|1981-05-26| US4356688A|1982-11-02| DE3062782D1|1983-05-19| EP0029808A1|1981-06-03| CS223836B2|1983-11-25| DD154616A5|1982-04-07| ES8201930A1|1982-01-16| JPH0157035B2|1989-12-04|
引用文献:
公开号 | 申请日 | 公开日 | 申请人 | 专利标题 US2515172A|1948-04-30|1950-07-18|Abbott Machine Co|Splicing threads| US3315458A|1963-09-10|1967-04-25|Allied Chem|Method for splicing multi-ply twisted cords| US3339362A|1966-07-05|1967-09-05|Du Pont|Method of joining strands| US3407583A|1967-06-12|1968-10-29|Techniservice Corp|Splicing of textile strands| US3581486A|1968-11-01|1971-06-01|Eastman Kodak Co|Splicing of multifilament strands by turbulent gaseous fluid| SE406755B|1973-01-19|1979-02-26|Pujol Isern Carlos|KIT FOR SEEDING THREADS AND FORGARN IN TEXTILE PROCESSES AND DEVICE FOR PERFORMING THE KIT| JPS5218820B2|1973-07-03|1977-05-24| US4002012A|1975-05-21|1977-01-11|Champion International Corporation|Method and apparatus for splicing thermoplastic textile yarn| JPS5343218A|1976-09-30|1978-04-19|Ishikawajima Kenzai Kogyo Kk|Underground tank construction method| CH623290A5|1978-06-12|1981-05-29|Fomento Inversiones Ind|JPS6116710B2|1981-09-03|1986-05-01|Murata Machinery Ltd| DE3143263C2|1981-10-31|1990-06-21|W. Schlafhorst & Co, 4050 Moenchengladbach, De| JPH0411464B2|1982-02-18|1992-02-28| IT1158133B|1982-08-03|1987-02-18|Savio Spa|PROCEDURE FOR OBTAINING JUNCTIONS BETWEEN WIRES| CH660722A5|1982-11-12|1987-06-15|Schweiter Ag Maschf|METHOD AND DEVICE FOR SPLICING TWO YARNS.| CS245207B1|1983-01-07|1986-09-18|Miloslav Pavek|Method of fibrous formations especially yarns splicing on textile machines and device for its application| JPS59144633A|1983-01-28|1984-08-18|Toyobo Co Ltd|Fluid yarn ending apparatus for continuous filament yarn| DE3437199C3|1983-10-14|1995-07-13|Commw Scient Ind Res Org|Method and device for connecting yarns consisting of fibers by pneumatic splicing| AU566956B2|1983-10-14|1987-11-05|Commonwealth Scientific And Industrial Research Organisation|Pneumatic splicing of yarns| DE3425349C2|1984-07-10|1993-08-12|W. Schlafhorst Ag & Co, 4050 Moenchengladbach, De| DE3528619C2|1985-08-09|1990-01-18|W. Schlafhorst & Co, 4050 Moenchengladbach, De| DE3607206C2|1986-03-05|1996-10-31|Schlafhorst & Co W|Method and device for making a splice connection| EP0249578B1|1986-06-11|1991-02-06|Carlos Pujol-Isern|Method and apparatus for joining two textile yarns together| CH670661A5|1987-02-20|1989-06-30|Mesdan Spa| US5163279A|1988-02-20|1992-11-17|Hans Stahlecker|Arrangement for producing feeding packages for a twisting operation|
法律状态:
优先权:
[返回顶部]
申请号 | 申请日 | 专利标题 CH1044879|1979-11-23| 相关专利
Sulfonates, polymers, resist compositions and patterning process
Washing machine
Washing machine
Device for fixture finishing and tension adjusting of membrane
Structure for Equipping Band in a Plane Cathode Ray Tube
Process for preparation of 7 alpha-carboxyl 9, 11-epoxy steroids and intermediates useful therein an
国家/地区
|