WO1996027038A1 - Dispositif de maintien du fil pour systemes d'alimentation en fil dans les metiers a tisser - Google Patents

Dispositif de maintien du fil pour systemes d'alimentation en fil dans les metiers a tisser Download PDF

Info

Publication number
WO1996027038A1
WO1996027038A1 PCT/SE1996/000282 SE9600282W WO9627038A1 WO 1996027038 A1 WO1996027038 A1 WO 1996027038A1 SE 9600282 W SE9600282 W SE 9600282W WO 9627038 A1 WO9627038 A1 WO 9627038A1
Authority
WO
WIPO (PCT)
Prior art keywords
holder
yam
holding device
grip plate
grip
Prior art date
Application number
PCT/SE1996/000282
Other languages
English (en)
Inventor
Lars-Göran SVANSTRÖM
Original Assignee
F & N Mekanik Aktiebolag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by F & N Mekanik Aktiebolag filed Critical F & N Mekanik Aktiebolag
Publication of WO1996027038A1 publication Critical patent/WO1996027038A1/fr

Links

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

Definitions

  • the present invention refers to a yam holding device for yam feeding systems in looms.
  • the ya holding device may, however, also be applied in other types of systems where thread-like products or other elongated objects shall in a similar way intermittently be held with a pinch jaw over the product or object.
  • the yam holding device in accordance with the invention refers to an improvement of a known yam holding device of a type which is elaborated upon in more detail in the ingress to the patent claim 1.
  • the yam shall in these systems be able to be drawn out with minimum possible resistance and with high speed, at the same time as the yam must be able to held secure in connection with its cutting and between subsequent wefts.
  • the present invention relates to this purpose of holding the yarn.
  • Yam refers in this paper to all types of yarns which are used in weaving. These yarns can be manufactured of natural materials such as cotton, wool, linen, or jute, etc. or artificial materials such as polyester, etc. or different mixtures between natural materials and artificial materials.
  • the yams can be of the single thread type or twined multiple thread yarns with circular, oval or flat shaped cross sections.
  • a previously know yam holding device has been manufactured with special steel plates in the pinch which grips the ya , since the yam which passes through the pincher exposes the pinching surfaces to severe wear.
  • the ya holding device opens the pincher by only a fraction of a millimetre, up to several millimetres, and since considerable quantities of yam can be feed at high speed through the narrow gap in the open pincher the surfaces in the pincher can be exposed to a high degree of wear.
  • the pinching surfaces in certain yam holding devices have been provided with ceramic plates. Even in these yam holding devices with ceramic plates there is considerable wear on the plates since they most often pinch over the same place, which implies that gradually the yam wears down a depression across the plates where the yam runs.
  • FIG. 1 A version of yam holding device with gripping plates manufactured of special steel is shown in Fig. 1, where rotating round special steel plates are used in the yam holding device's pincher, which implies that the plates can rotate and change the pinching surfaces for the line of wear running across the plates. The plates index forward new pinching surfaces as the yam is fed forward in the pincher.
  • These yam holding devices with round special steel plates also ensure improved wear resistance than what can be achieved with yam holding devices with fixed ceramic plates, in that new pinch surfaces on the opening of the yam holding device can be indexed forward for exposure to wear from the yarn.
  • the yam holding device consists of an electro magnetic coil 17 which activates an anchor 7, on which anchor 7 via a pull rod 6 one of the plates 3 is arranged which as an electro magnet can activate pinching over the yam 2.
  • the grip plate 3, hereafter called active grip plate is circular with a centre hole which is entered on the pull rod 6 from its opposite end to the anchor end, and held in a fixed axial position to the pull rod between an projection on the pull rod and lock nut 5, which lock nut is similarly entered on the pull rod 6 from the threaded end opposite the anchor end.
  • the second pinching grip plate 4 over the yam is also circular with a centre hole 10, which centre hole runs freely to a certain tolerance on the pull rod 6.
  • the passive grip plate 4 is housed on a round pull rod mounted circular centring washer 11, the axial contact surface of which to the passive grip plate 4 is bowl shaped. In that the passive grip plate's contact surface to the centre washer 11 is in a corresponding way bowl shaped, the passive grip plate 4 can be made self-correcting in terms of parallelism with the active grip plate's 3 interactive pinching surface.
  • the yam holding device 1 consists of a mounting flange 13 with mounting hole 13' for mounting on a bracket on the loom. In Fig.
  • this mounting flange is arranged between a fixed wear washer 12 on the flange, against which the centring washer 11 lies, and the electro magnet housing 15.
  • the housing 15 houses in the conventional manner a coil 17 wound round a bobbin concentric with the pull rod and anchor 7.
  • the yam holding device functions in such a way that when the coil is supplied with voltage the anchor 7 is drawn to an anchor stroke 18, whereby the yam holding device's active grip plate 3 is actuated away from the passive grip plate 4 and opens the pincher between the plates.
  • a return spring 8 shoots out on a flange 7' on the anchor 7 so that the active grip plate 3 pinches the yam 2 to the passive grip plate 4.
  • the plates 3 and 4 can rotate round the yam holding device's axial line CC the pinching surfaces over the ya will continuously change, which can be seen in Fig. 2 where the grip plate 4 is shown in a view seen from the section 11-11 indicated in Fig. 1.
  • the yam 2 passes over the grip plate in the direction of feed, designated FEED in the figures.
  • the grip plate can rotate, in the direction ROT, round the axis CC, the grip plate's contact line to the yam is continuously changed.
  • lines A, B and C indicate the contact lines which, for example, are achieved at the third, second and immediately preceeding pinching event respectively of the yam.
  • the wear will in this way be evenly distributed over the plates.
  • the active grip plate 3 is in the preferred version locked on the pull rod 6, but when the pull rod 6 together with the grip plate 3 and anchor 7 constitute in the housing round the centre axis CC a free-rotating unit, the active grip plate will also be able to rotate with this unit and continuously change the contact line to the yam 2.
  • a disadvantage with this type of yam holding device is that the passive grip plate is not fixed axially in the direction of the centre axis CC, which implies that the passive grip plate tends adhere at the active grip plate on the movement of the active grip plate to open the pincher. This causes the passive grip plate 4 to lift and interfere with the feeding of the yam between the plates 3 and 4, which can cause the yam to be exposed to braking forces which can break the yarn. In shuttle-less looms the undesired braking force on the yam can imply that the ya is not shot completely into the warp, whereby the weaving is incomplete and can stop.
  • Another disadvantage is that the passive grip plate as a result of its large radius of the bowl form in the contact surfaces between the passive grip plate 4 and centring washer 11 is given an irregular behaviour, when the yam feed over the passive grip plate's pinching surface tends to shoot the passive grip plate radially in the yam's direction of feed, FEED, on the opening and closing of the pincher when the grip plates are not parallel. With each pinch the passive grip plate 4 will return to the radial position which gives parallelism with the active grip plate, which causes noise and interference to the yam feeding.
  • the yam holding device can only be mounted so that the centre axis CC is vertical, with the active grip plate above. Other directions of mounting would imply that the passive plate would follow the active grip plate and interfere with the yam feeding.
  • the purpose of the invention is to achieve an improved yam holding device which has all the advantages which a yam holding device with circular rotating grip plates has in terms of wear resistance and self-correction of the parallelism between the gripping surfaces over the yarn, but where a yam holding device in accordance with the invention reduces interference to the yam feeding through the yam holding device.
  • a further purpose is that with the yam holding device in question receives a quieter gripping function with a prolonged service-life of the component parts, where lateral movement in the direction of the yam feeding and axial movement across the direction of yam feeding are reduced on at least the grip plate which is self-adjusting for the parallel setting in relation to the other interactive grip plate.
  • a ftirther purpose is that the yam holding device should be able to be fitted so that a centre axis CC can assume any angle in a vertical plane transverse to the direction of the yam feeding, without the passive grip plate interfering with the yam feeding
  • the yam holding device in accordance with the invention is distinguished by the characteristic part of claim 1.
  • Fig. 1 shows a previously known yam holding device which by way of introduction was described in the section prior art:
  • Fig. 2 shows a view seen in the section Il- ⁇ in Fig. 1 of how the yam continuously changes the contact line to the fixed pinching circular grip plates over the yam in the this type of yam holding device.
  • Fig. 3 shows a yam holding device in accordance with the invention.
  • Fig.4 shows a schematic view of a yam feeding system for a loom with a ya holding device arranged in a yam feeding system.
  • Fig. 3 shows a design example of the yam holding device in accordance with the invention where the anchor, the pull rod and the active grip plate are disengaged in relation to other parts which are seen in a section through the ya holding device.
  • the parts which correspond with parts in the yam holding device shown in Fig. 1 have in Fig. 3 been given the same reference numbers.
  • the yam holding device's housing 15 and the electro magnet 16, 17 arranged in the housing are basically identical with the housing and electro magnet in Fig. 1.
  • the anchor 7 and the thus related pull rod 6 actuate the movable active grip plate 3 in the corresponding manner as in Fig. 1 , i.e. that when the electro magnet is activated the active grip plate 3 is moved away in the axial direction CC of the pull rod to release the yam which is pinched between the passive grip plate 4 and the active grip plate 3 when the electro magnet is deactivated.
  • the passive grip plate 4 is arranged in a semi spherical shaped holder 22.
  • the cross-sectional surface on the holder 22 is unconventionally completely blackened with a view to increasing the clarity in the figure.
  • the convex surface on the semi spherically shaped holder 22 is directed away from the passive grip plate.
  • the semi spherical holder 22 has a concave and a convex surface where in the semi spherical holder arranged grip plate 4 lies like a lid over the holder's concave surface.
  • the passive grip plate 4 is held round its outer periphery to the semi spherically shaped holder's 22 outer periphery by means of an anchor element 25.
  • the anchor element 25 is in the shown design a form lock where a groove which runs along the semi spherically shaped holder's outer edges is mounted over a corresponding phase of the passive grip plate's outer periphery.
  • the semi spherically shaped holder is appropriately manufactured of a polymer material of low- friction type, e.g. Teflon, which material has a certain limited flexibility which permits holder 22 and its groove to be pulled over the passive grip plate's chamfered outer periphery.
  • the semi spherically shaped holder 22 is housed with its convex surface, in relation to the housing 15 fixed bearing washer 21 which has a corresponding concave bearing surface to which the holder's convex surface is in contact.
  • the bearing surfaces between the holder 22 and the bearing washer 21 are convex and concave respectively with a radius R in relation to the pull rod's centre axis CC.
  • the holder 22 can thereby adjust itself so that parallelism is achieved in the contact surfaces between the active grip plate 3 and the passive grip plate 4 arranged at the housing.
  • the bearing washer 21 can be fixed to the mounting flange 13 arranged on the housing by means of gluing, welding or screwing on a threaded extension 24 of the anchor element 18, which extension is arranged concentrically round the pull rod 6.
  • the holder 22 is attached to the bearing washer with a lock ring 24 which is in contact with a concave surface in the semi spherically shaped holder 22.
  • the lock ring 24 is preferably screwed on the threaded extension 24 of the anchor element and its clamping pressure against the holder 22 is regulated by means of the torque on the lock ring.
  • the lock ring 23 is, however, only tightened sufficiently so that the tolerance between the lock ring and the holder's 22 inner concave surface is minimised and the flexibility in the bearing surfaces between the holder 22 and the bearing washer is retained. After tightening of the lock element this is fixed in position in that the lock element's 23 internal thread is locked by means of locking agent to the external thread on the extruding projection 24 from the housing.
  • locking can be achieved with a lock screw applied to the thread
  • the bearing surfaces between holder 22 and bearing washer 21 have a constant curvature with radius R and its centre of curvature should preferably lie in the pull rod's centre axis CC and in the passive grip plate's 4 plane.
  • the passive grip plate 4 then takes up the forces which it is exposed to by the ya 2 fed through the gap. With the yam holding device in Fig. 1 an unstable lateral movement is achieved on the passive grip plate since the large radius on its contact surface implies that the passing yam tends to the lift the passive grip plate in the direction of the yam feeding, FEED.
  • the holder's concave surface has a constant radius of curvature (R) where the centre of curvature coincide with the pull rod's centre axis (CC) and the grip plate's 4 plane arranged in the holder, and the lock element's (23) contact surface to the holder's concave surface has a convex surface corresponding to the holder's concave surface.
  • the semi spherically shaped holder 22 is in Fig. 3 mounted on the extended part of the anchor element and is provided with a sufficient tolerance between its mounting hole and the extended part of the anchor element in order to facilitate adjustment of parallelism between the plates 3, 4.
  • a yam feeding system for a shuttle-less loom 47 is shown in Fig.4 schematically with a yam holding device 34 arranged in the yam feeding system. Only one yam feeding system is shown in the figure. In automated looms there are often a number of parallel yam feeding systems, whereby replacement of yam with for example other colours can be made during the weaving between different successive wefts.
  • the yam is led after the yam holding device 34 on to a second yam guide 35 and on to a water jet nozzle 36.
  • the water jet nozzle 36 then shoots the yam 2 into the warp between the threads in the warp which are lifted, hereafter designed top warp 39, and the threads in the warp which are lowered, hereafter designated bottom warp 40.
  • the yam 2 is shot in between the top and bottom warps 39, 40 by means of a small water droplet which at high pressure is shot from the water jet nozzle taking the yam 2 with it
  • Pressurised water is applied to the water jet nozzle from a pressure source P via an adjustable valve V.
  • the valve V opens very quickly and only a small water droplet leaves the nozzle 36 and pulls the yam 2. With a cutting unit 37 the yam can be cut after it has been fed in the warp.
  • the cutting unit can be provided with a cutting edge or alternatively hot wires can bum off the ya , which is often used for weaving with polyester yam.
  • the cutting unit 37 is preferably arranged close to the warp or weave 38 with a view to minimising the yam spillage.
  • the yam feeding system is monitored by a control unit 41 which can be reprogrammed with a portable hand terminal 42 for adjustment to different types of yarns as a result of the weight of the yam, etc.
  • heavier or more rigid yams require a larger water droplet or higher pressure in able to pull the ya through the warp.
  • the control unit 41 regulates the different unit functions, via control signal lines 50, 51, 52, 53 connected to the yam hopper 31, the yam holding device 34, the water jet nozzle's control valve V and cutting unit 37.
  • the synchronisation of the units 31 , 34, V and 37 to the loom 47 takes place on the basis of input signals on a line 59 from for example a sensor 45 which detects the rotation of the loom's feeder rollers 44 and therefore the length of the finished weave, in combination with other input signal lines 58 from sensors 46 arranged on the loom 47.
  • the holder 22 is preferably manufactured of a polymer material, while the lock ring 23 and bearing washer 21 are manufactured for example of an aluminium alloy.
  • the choice of material is governed by the requirement of low friction and retained flexibility in the contact surfaces between the holder and bearing washer 21 / lock ring 23, and the requirement during longer periods of operation to retain a given tolerance between the holder's and the bearing washer's interactive bearing surfaces.
  • the holder 22 may instead be manufactured of aluminium, while the lock ring 23 and bearing washer 21 are manufactured of polymer material.
  • the invention may within the scope of the patent claims be modified in a number of ways.
  • the free- rotating circular grip plates 3, 4 may for example be coated with ceramic material, or alternatively the grip plates in their entirety may be manufactured of ceramic material.
  • the most important aspect is that the grip plates retain their free-rotating characteristics in order to enable continuous replacement of the yam's line of wear on the grip surfaces.
  • the lock ring 23 in the preferred version may also be replaced with a different design which ensures that the holder does not follow on when the active grip plate is actuated to open
  • the holder 22 in Fig. 3 may, for example, in its lower part be provided with a sleeve arranged concentrically with the pull rod directed out from the holder's convex surface, which sleeve has a radial outward directed collar which grips in a radial groove arranged internally in the bearing washer's 21 inlet for the pull rod 6.
  • the ya holding device may also be modified in such a way that both grip plates are housed in their own semi spherical holder if improved and greater reliability in the parallel adjustment is required.
  • both grip plates may be flexible, and actuated by the same or each by their own pull rod with attendant electro magnet.
  • the servo element may also be of another type than the electro magnet, for example hydraulic or pneumatic cylinders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

La présente invention concerne un dispositif amélioré de maintien du fil pour systèmes d'alimentation en fil dans les métiers à tisser, dispositif constitué par des plaques preneuses circulaires tournant librement et qui, lors de l'ouverture du dispositif de maintien du fil, peuvent tourner et changer les surfaces de contact du fil envoyé dans le dispositif de maintien du fil. Ce type de dispositif de maintien du fil présente une résistance élevée à l'usure ainsi qu'un réglage automatique du parallélisme des surfaces qui maintiennent le fil. Au moins l'une des plaques preneuses (4) est fixée et bloquée, de par les formes des éléments, dans un dispositif hémisphérique (22) de maintien du fil, de rayon R, dont le centre de courbure coïncide avec l'axe central CC de la tirante et avec le plan de la plaque preneuse (4). Le dispositif de maintien du fil (22) est logé, à la façon d'une articulation à rotule, dans un coussinet (21) et, grâce à un écrou de blocage réglable (23), le jeu du logement peut être réduit en même temps que le dispositif de maintien conserve sa mobilité dans les surfaces de logement. Le blocage du dispositif de maintien du fil (22) par l'écrou de blocage (23) et le verrouillage, sous l'effet des formes (25), de la plaque preneuse (4) par le dispositif de maintien, empêchent cette dernière de suivre le mouvement d'ouverture de la plaque preneuse opposée. On obtient ainsi un fonctionnement plus silencieux du maintien et une augmentation de la durée de vie des pièces constituant le dispositif de maintien du fil et, en même temps, les perturbations de l'arrivée du fil sont réduites au minimum.
PCT/SE1996/000282 1995-03-02 1996-03-01 Dispositif de maintien du fil pour systemes d'alimentation en fil dans les metiers a tisser WO1996027038A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9500788-6 1995-03-02
SE9500788A SE504096C2 (sv) 1995-03-02 1995-03-02 Garngripare för garnmatningssystem i vävstolar

Publications (1)

Publication Number Publication Date
WO1996027038A1 true WO1996027038A1 (fr) 1996-09-06

Family

ID=20397439

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/000282 WO1996027038A1 (fr) 1995-03-02 1996-03-01 Dispositif de maintien du fil pour systemes d'alimentation en fil dans les metiers a tisser

Country Status (5)

Country Link
KR (1) KR100439275B1 (fr)
CN (1) CN1042558C (fr)
CZ (1) CZ283594B6 (fr)
SE (1) SE504096C2 (fr)
WO (1) WO1996027038A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002066354A2 (fr) * 2001-02-16 2002-08-29 Iropa Ag Grappin pour fil
WO2005058737A1 (fr) * 2003-12-10 2005-06-30 F & N Mekanik Ab Grappin pour fil
CN107217386A (zh) * 2017-07-04 2017-09-29 浙江恒石纤维基业有限公司 玻纤经编纱线监控装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101786510B (zh) * 2010-03-23 2011-07-27 上海交通大学 自动夹线机构
CN102704170B (zh) * 2012-06-05 2014-04-23 常熟市国光机械有限公司 导纱系统的闭纱机构
CN110258018B (zh) * 2019-07-22 2024-02-06 苏州星科自动化科技有限公司 抽纱装置以及具有其的针织横机剪抽纱设备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664173A5 (de) * 1983-07-29 1988-02-15 Textima Veb K Blockiereinrichtung fuer schussfaeden an webmaschinen.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4104663C1 (fr) * 1991-02-15 1992-08-13 Memminger-Iro Gmbh, 7290 Freudenstadt, De
CN1045479C (zh) * 1991-03-26 1999-10-06 Iro有限公司 纱线制动装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664173A5 (de) * 1983-07-29 1988-02-15 Textima Veb K Blockiereinrichtung fuer schussfaeden an webmaschinen.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002066354A2 (fr) * 2001-02-16 2002-08-29 Iropa Ag Grappin pour fil
WO2002066354A3 (fr) * 2001-02-16 2003-12-11 Iropa Ag Grappin pour fil
CN1302167C (zh) * 2001-02-16 2007-02-28 艾罗帕股份有限公司 夹纱器
WO2005058737A1 (fr) * 2003-12-10 2005-06-30 F & N Mekanik Ab Grappin pour fil
CN107217386A (zh) * 2017-07-04 2017-09-29 浙江恒石纤维基业有限公司 玻纤经编纱线监控装置
CN107217386B (zh) * 2017-07-04 2023-12-05 浙江振石新材料股份有限公司 玻纤经编纱线监控装置

Also Published As

Publication number Publication date
KR100439275B1 (ko) 2004-08-16
CZ342296A3 (en) 1997-02-12
SE504096C2 (sv) 1996-11-11
SE9500788D0 (sv) 1995-03-02
CZ283594B6 (cs) 1998-05-13
SE9500788L (sv) 1996-09-03
CN1042558C (zh) 1999-03-17
CN1149896A (zh) 1997-05-14
KR970702943A (ko) 1997-06-10

Similar Documents

Publication Publication Date Title
KR100245609B1 (ko) 씨실 공급장치를 위한 자동조절 실 제동장치
US5343899A (en) Output yarn brake
KR100371989B1 (ko) 제어가능한출력브레이크및발사체또는그리퍼직조기
CN1026904C (zh) 织机的纱线制动器
JPH10505893A (ja) 圧縮空気等のためのスロットル弁およびエアー式織機でのスロットル弁の使用
KR100310954B1 (ko) 위사공급기
US20140306051A1 (en) Yarn feeder of storage type with magnetic brake
CN1250436C (zh) 控制纱线加工系统的方法和纱线加工系统
WO1996027038A1 (fr) Dispositif de maintien du fil pour systemes d'alimentation en fil dans les metiers a tisser
EP0252866B1 (fr) Fournisseur de fil pour machines textiles
US4785855A (en) Weft yarn store for looms having a braking device
US5662148A (en) Thread feed system having an auxilliary conveyor device
KR100191653B1 (ko) 실 제동장치
EP0963470B1 (fr) Systeme d'alimentation dosee
EP0754645B1 (fr) Dispositif électropneumatique pour enfiler automatiquement un fournisseur de fil de trame et fournisseur de fil de trame qui comprend ce dispositif
EP0892864B1 (fr) Frein a disque axial et appareil d'alimentation en fil equipe d'un tel frein
DE19625760A1 (de) Fadenbremse
CN210194107U (zh) 一种针织机械的纱线回线装置
EP0438439B1 (fr) Dispositif de stockage et de livraison du fil
EP1094138B1 (fr) Dispositif anti-ballon pour les fournisseurs de trame de métiers à tisser
EP1526102B1 (fr) Dispositif de freinage pour des fils de trame pour des machines de textiles
CS277298B6 (en) Winding device, particularly of conical bobbins on textile machines.
IES60971B2 (en) Apparatus for controlling tension in a fibre
CS231367B1 (cs) Způsob zabezpečení spolehlivé činnosti pletacího stroje a zásobníkový hlídač rázů tahové síly v niti k provádění tohoto způsobu

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 96190262.0

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): CN CZ KR

WWE Wipo information: entry into national phase

Ref document number: 1019960706168

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: PV1996-3422

Country of ref document: CZ

WWP Wipo information: published in national office

Ref document number: PV1996-3422

Country of ref document: CZ

WWG Wipo information: grant in national office

Ref document number: PV1996-3422

Country of ref document: CZ