SE503673C2 - Grinding procedure and milling - Google Patents
Grinding procedure and millingInfo
- Publication number
- SE503673C2 SE503673C2 SE9404159A SE9404159A SE503673C2 SE 503673 C2 SE503673 C2 SE 503673C2 SE 9404159 A SE9404159 A SE 9404159A SE 9404159 A SE9404159 A SE 9404159A SE 503673 C2 SE503673 C2 SE 503673C2
- Authority
- SE
- Sweden
- Prior art keywords
- grinding
- drum
- rotation
- time interval
- lifting
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/02—Centrifugal pendulum-type mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/24—Driving mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/22—Lining for containers
- B02C17/225—Lining for containers using rubber or elastomeric material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
15 20 25 30 503 673 2 sida anordnad att vid drivning av kvarntrumman med en konstant rotationshastighet under ett första tidsintervall i en första rotationsriktning bringas i kontakt med malningskroppar hos nämnda mängd, för malning med en större andel krossning och en mindre andel finmalning av malgodset, dels en till den höglyftande sidan motsatt, låglyftande utbildad sida anordnad att vid drivning av kvarntrumman med nämnda konstanta rotationshastighet i ett på det första tidsintervallet följande andra tidsintervall i en till den första rotationsriktningen motsatt, andra rotationsriktning bringas i kontakt med malningskroppar hos nämnda mängd, för malriing med en mindre andel krossning och en större andel finmalning av malgodset. Arranged to be brought into contact with grinding bodies of said quantity when grinding the mill drum at a constant rotational speed during a first time interval in a first direction of rotation, for grinding with a larger proportion of crushing and a smaller proportion of fine grinding of the grinding material, on the other hand, a side opposite to the high-lift side is arranged to be brought into contact with grinding bodies of said quantity when driving the mill drum with said constant rotational speed in a second time interval following the first time interval in a second rotation direction opposite to the first direction of rotation, for grinding with a smaller proportion of crushing and a larger proportion of fine grinding of the grinding material.
Insikten som ligger till grund för uppfinningen är sålunda att i princip samma verkan som att driva kvamen med varierande hastighet, kan uppnås genom ändring av rota- tionsriktningen om samtidigt infodringen förses med dubbelverkande asymmetriska lyftorgan, vilka åstadkommer olika lyfthöjd i respektive rotationsriktning. Asymmetriska lyftorgan är visserligen kända i sig, men ej kända att drivas i olika riktning under ett och samma malningspass för att i en kvarn för särskilt keramiskt malgods åstadkomma en målinriktad lyftliöjdsskillnad mellan de olika rotationsriktningama.The insight on which the invention is based is thus that in principle the same effect as driving the wedge at varying speeds can be achieved by changing the direction of rotation if at the same time the liner is provided with double-acting asymmetric lifting means, which provide different lifting heights in each direction of rotation. Asymmetrical lifting means are admittedly known per se, but are not known to be driven in different directions during one and the same grinding session in order to achieve a targeted lifting height difference between the different directions of rotation in a mill for special ceramic grinding material.
Andra särdrag och fördelar med uppfinningen framgår av övriga patentkrav och följande detaljerade beskrivning.Other features and advantages of the invention will be apparent from the other claims and the following detailed description.
Ett utföringsexempel av uppfinningen beskrivs närmare i det följande med hänvisning till bifogad ritning, på vilken FIG.1 visar en tvärsnittsvy av en del av en kvamtrumma utrustad med en kvamirifodring enligt uppfinningen; FIG.2 visar i större skala den geometriska konfigurationen hos en lyftare i en kvarriinfodring enligt uppfinningen; och FIG.3 visar en schematisk tvärsnittsvy av en satskvamtrumma enligt uppfmningen under drift i de båda rotationsriktningarna.An embodiment of the invention is described in more detail in the following with reference to the accompanying drawing, in which FIG. 1 shows a cross-sectional view of a part of a chamber drum equipped with a chamber feeding according to the invention; FIG. 2 shows on a larger scale the geometric configuration of a lifter in a quarry lining according to the invention; and FIG. 3 shows a schematic cross-sectional view of a batch drum according to the invention during operation in the two directions of rotation.
I FIG.1 visas en del av en kvamtrumma 40 hos en satskvam med en infodring av polymert material bestående av ett flertal långsträckta infodringselemenrt 10 vilka är axiellt orienterade i trumman 40 och placerade så att de täcker hela trummans 40 innerperiferi.FIG. 1 shows a part of a chamber drum 40 of a batch chamber with a lining of polymeric material consisting of a plurality of elongate lining elements 10 which are axially oriented in the drum 40 and positioned so as to cover the entire inner periphery of the drum 40.
Varje infodringselement 10 är, i tvärsnitt betraktat, vid sin ena sida utbildat med ett radiellt in i trumman 40 frainskjutande lyftorgan 12. Lyftorganet 12 är vid infodringse- lementets 10 ena ände begränsat av en höglyftande utbildad sida 14 och vid sin därtill motsatta ände begränsat av en låglyftande utbildad sida 16. Mellan dessa sidor 14 och 16 har lyftorganet 12 en väsentligen plan ovansida 18.Each lining element 10 is, in cross-section, formed at one side by a lifting means 12 projecting radially into the drum 40. The lifting means 12 is limited at one end of the lining element 10 by a high-lifting formed side 14 and at its opposite end limited by a low-lift formed side 16. Between these sides 14 and 16 the lifting member 12 has a substantially flat top 18.
Vid lyftorganets 12 undersida är i infodringselementet 10 inskjuten en fästprofil 28 hos ett med 30 allmänt betecknat bultinfástningsarrangemang. Fästprofilen 28 uppvisar ett nedåt vänt lángsträckt spår med mot varandra invinklade flänsar, så att ett huvud hos 10 15 20 25 30 503 673 3 infästningsarrangemangets 30 bult kan skjutas in i spåret och fasthâllas däri för att frankra in- fodringselementet 10 vid trumman 40 på det i FIG.l visade sättet.At the underside of the lifting means 12, a fastening profile 28 of a bolt fastening arrangement generally designated 30 is inserted into the lining element 10. The mounting member 28 has a downwardly facing elongate groove with flanges angled toward each other so that a head of the bolt of the mounting arrangement 30 can be slid into the groove and retained therein to frank the liner member 10 at the drum 40 thereon. shown in FIG. 1.
Nedanför en mot den höglyftande sidan 14 riktad fläns hos fåstprofilen 28 är infodringselementet 10 försett med ett till kvamtrummans 40 inneryta angränsande urtag 26, vilket är anordnat att överlappande fastklämma ett omrâde 24 hos en angränsande ände av ett intilliggande infodringselement 10. Den kvarvarande delen av infodringselementet 10 mellan omrâdet 24 och lyftorganet 12 uppvisar en väsentligen plan ovansida 20 och en till omrâdet 24 angränsande uppâtvinklad sida 22.Below an end of the fastening profile 28 directed towards the high-lifting side 14, the lining element 10 is provided with a recess 26 adjacent to the inner surface of the chamber drum 40, which is arranged to overlap an area 24 of an adjacent end of an adjacent lining element lining element. 10 between the area 24 and the lifting means 12 has a substantially flat upper side 20 and an upwardly angled side 22 adjacent to the area 24.
Som framgår av särskilt FIG.2, har urtaget 26 en sådan utsträckning i trummans 20 omkretsriktning, att graden av överlappning mot det däremellan fastklämda området 24 kan varieras. Speciellt kan denna variationsmöjlighet tillåta att ett bestämt infodringselement 10 erhåller en variabel verksam bredd som utgör en heltalsmultipel av en verksam kvarntrum- meinneromkrets. Med andra ord kan därigenom en enda dimension av ett infodringselement 10 användas för infodring av trummor av olika diametrar genom anpassning av urtagets 26 överlappning, så att ett bestämt antal lyftorgan blir likformigt fördelade i kvamtrumman 40.As can be seen in particular from FIG. 2, the recess 26 has such an extent in the circumferential direction of the drum 20 that the degree of overlap towards the clamped area 24 therebetween can be varied. In particular, this possibility of variation may allow a particular liner element 10 to obtain a variable effective width which constitutes an integer multiple of an effective mill drum circumference. In other words, a single dimension of a lining element 10 can thereby be used for lining drums of different diameters by adjusting the overlap of the recess 26, so that a certain number of lifting means are uniformly distributed in the chamber drum 40.
Som ytterligare framgår av FIG.2, har den höglyftande sidan 14 en normalriktning N1 som med en vinkel a obetydligt avviker från eller väsentligen sammanfaller med en första rotationsrikning Dl. Den läglyftande motsatta sidan 16 har en normalriktning N2 som med en vinkel ß avviker från den motsatta rotationsriktningen D2. En vinkel ß mellan omkring 64 och 84 grader och särskilt omkring 74 grader har därvid visat sig vara fördelaktig.As further shown in FIG. 2, the high-lift side 14 has a normal direction N1 which with an angle α deviates slightly from or substantially coincides with a first direction of rotation D1. The position-lifting opposite side 16 has a normal direction N2 which deviates by an angle ß from the opposite direction of rotation D2. An angle ß between about 64 and 84 degrees and especially about 74 degrees has been found to be advantageous.
I FIG.3 visas principiellt två halvor av en kvamtrumma 40 enligt uppfinningen under drift med en sats malgods 50 med malningskroppar 52, varvid den högra halvan visar kvarntrumman 40 roterande i en första riktning med en konstant rotationshastighet v, medan den vänstra halvan visar kvamtrumman 40 roterande i motsatt riktning likaså med den konstanta rotationshastigheten v. Som redan antytts drivs trumman 40 i den första rotations- riktningen i ett inledande eller föregående tidsintervall vid malning av en sats malgods, medan trumman 40 drivs i den motsatta riktningen under ett avslutande eller därpå följande tidsintervall. Intervallens längd kan bestämmas med utgångspunkt frän malgodsets sanunan- sättning och kan således variera inbördes.FIG. 3 shows in principle two halves of a chamber drum 40 according to the invention during operation with a batch of grinding material 50 with grinding bodies 52, the right half showing the mill drum 40 rotating in a first direction with a constant rotational speed v, while the left half shows the chamber drum 40. rotating in the opposite direction as well as the constant rotational speed v. As already indicated, the drum 40 is driven in the first direction of rotation in an initial or previous time interval when grinding a batch of grinding material, while the drum 40 is driven in the opposite direction during a final or subsequent time interval. The length of the intervals can be determined on the basis of the mold application of the molded goods and can thus vary with each other.
Som framgår av FIG.3, är ikvarntrummans 40 första rotationsrilttning infodringse- lementens höglyftande sidor 14 vända i denna riktning. Därigenom kommer det malgods 50 och de malningskroppar 52 som befinner sig närmast kvamtrummans 40 periferi att medbringas av infodringselementens höglyftande sidor 14 och falla eller utslungas från dessa in i trumman 40 från en relativt stor höjd hl, så att när detta gods och dessa kroppar träffar 503 673 4 malningschargen har de en relativt stor anslagsenergi resp. anslagshastighet vl och utövar följaktligen en relativt stor krossverkan på det fortfarande grova malgodset. När däremot kvarntrumman 40 roterar i den motsatta riktningen, är infodringselementens låglyftande sidor 16 vända i denna riktning. Det malgods och de malningskroppar som medbringas av dessa sidor 16, kommer ej längre att upplyftas lika högt, utan glider snabbt av därifrån, eller eventuellt utstöts, vid en avsevärt lägre höjd h2, så att de har en avsevärt mindre anslagsener- gi eller anslagshastighet v2 när de äter träffar malningschargen. Därigenom âstadkommes följaktligen en mindre krossverkan, så att malgods och malningskroppar erhåller en tumlande rörelse som åstadkommer en mer uttalad nötande malning eller finmalning av av det redan 10 under det föregående intervallet delvis krossade eller färdigkrossade malgodset. 15 20 Satskvamens rotation i den motsatta riktningen kan på enkelt sätt åstadkommas med inom elmotorområdet välkända lösningar som ej erfodrar några ingrepp i t.ex. en redan befintlig mekanisk drivtransmission.As shown in FIG. 3, in the first direction of rotation of the milling drum 40, the high-lifting sides 14 of the lining elements are turned in this direction. Thereby, the grinding material 50 and the grinding bodies 52 which are closest to the periphery of the chamber drum 40 will be carried by the high-lifting sides 14 of the lining elements and fall or be ejected from them into the drum 40 from a relatively large height hl, so that when this material and these bodies hit 503 673 4 the grinding charge, they have a relatively large impact energy resp. impact velocity and consequently exerts a relatively large crushing effect on the still coarse grinding material. On the other hand, when the mill drum 40 rotates in the opposite direction, the low-lifting sides 16 of the lining elements are turned in this direction. The grinding material and the grinding bodies carried by these sides 16 will no longer be lifted as high, but will slide quickly from there, or possibly be ejected, at a considerably lower height h2, so that they have a considerably smaller impact energy or impact velocity v2 when they eat hit the grinding charge. Consequently, a smaller crushing effect is achieved, so that grinding material and grinding bodies obtain a tumbling movement which produces a more pronounced abrasive grinding or grinding of the already partially crushed or completely crushed grinding material already during the previous interval. The rotation of the batch chamber in the opposite direction can easily be achieved with solutions well known in the field of electric motors which do not require any intervention in e.g. an existing mechanical drive transmission.
Det förutses att en fackman på omrâdet med tillgång till denna beskrivning omedelbart kan uttänka olika modifikationer av de beskrivna utföringsformerna. Be- skrivningen är i sig ej avsedd att begränsa uppfinningen, utan snarare att tydliggöra ett för tillfället föredraget utförande.It is envisaged that one skilled in the art having access to this description may immediately devise various modifications of the described embodiments. The description itself is not intended to limit the invention, but rather to clarify a presently preferred embodiment.
Claims (7)
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9404159A SE503673C2 (en) | 1994-11-30 | 1994-11-30 | Grinding procedure and milling |
| EP95850200A EP0714703B1 (en) | 1994-11-30 | 1995-11-13 | A grinding process and a drum lining |
| ES95850200T ES2143610T3 (en) | 1994-11-30 | 1995-11-13 | CRUSHING AND COATING PROCEDURE FOR CRUSHER DRUM. |
| DE69514996T DE69514996T2 (en) | 1994-11-30 | 1995-11-13 | Grinding process and lining for grinding drum |
| MX9504956A MX9504956A (en) | 1994-11-30 | 1995-11-28 | Milling process and interior coating for a mill cylinder. |
| KR1019950044223A KR100400439B1 (en) | 1994-11-30 | 1995-11-28 | Grinding Method and Drum Lining |
| JP31067095A JP3616182B2 (en) | 1994-11-30 | 1995-11-29 | Grinding method and drum lining |
| AR10035895A AR002457A1 (en) | 1994-11-30 | 1995-11-29 | Method for grinding a batch of material particularly ceramic material and mill drum to carry it out |
| TW084112688A TW372905B (en) | 1994-11-30 | 1995-11-29 | A polymer lining for rotary mill drum and a method of grinding a batch of material in a mill drum having a lining of polymer material |
| CN95121887A CN1071622C (en) | 1994-11-30 | 1995-11-30 | Grinding process and drum lining |
| BR9505598A BR9505598A (en) | 1994-11-30 | 1995-11-30 | Grinding process of a batch of material and polymer coating for a rotary mill drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9404159A SE503673C2 (en) | 1994-11-30 | 1994-11-30 | Grinding procedure and milling |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| SE9404159D0 SE9404159D0 (en) | 1994-11-30 |
| SE9404159L SE9404159L (en) | 1996-05-31 |
| SE503673C2 true SE503673C2 (en) | 1996-07-29 |
Family
ID=20396174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE9404159A SE503673C2 (en) | 1994-11-30 | 1994-11-30 | Grinding procedure and milling |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0714703B1 (en) |
| JP (1) | JP3616182B2 (en) |
| KR (1) | KR100400439B1 (en) |
| CN (1) | CN1071622C (en) |
| AR (1) | AR002457A1 (en) |
| BR (1) | BR9505598A (en) |
| DE (1) | DE69514996T2 (en) |
| ES (1) | ES2143610T3 (en) |
| MX (1) | MX9504956A (en) |
| SE (1) | SE503673C2 (en) |
| TW (1) | TW372905B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1305842B1 (en) | 1998-08-24 | 2001-05-16 | Pescale S P A | PROCEDURE, DEVICE AND PLANT FOR THE TREATMENT OF CLEANING IRREGULAR PIECES OF DIFFERENT MATERIALS |
| IT1307932B1 (en) * | 1999-01-27 | 2001-11-29 | Siti | DEVICE FOR GRINDING CERAMIC MATERIALS AND PLANT INCLUDING THE DEVICE. |
| PE20061001A1 (en) * | 2005-01-18 | 2006-11-13 | Vulco Sa | PROTECTIVE PART COMPONENT OF A SPRAY MILL |
| US10668478B2 (en) | 2013-09-11 | 2020-06-02 | Distron Manufacturing Co. | Multi directional rifling and multi flow variable speed rifling for liner segments for crushers, reclaimers, separators and cleaners for products |
| CN103612192A (en) * | 2013-11-06 | 2014-03-05 | 梧州学院 | Surface grinding and polishing method for superhard material |
| CN104175207A (en) * | 2014-08-26 | 2014-12-03 | 梧州市旺发新工艺品有限公司 | Gem forming machine |
| CN104209850A (en) * | 2014-08-26 | 2014-12-17 | 梧州市旺发新工艺品有限公司 | Gem polishing machine |
| JP6426593B2 (en) * | 2015-12-16 | 2018-11-21 | 株式会社栗本鐵工所 | Crushing machine |
| MX2018004697A (en) * | 2016-02-08 | 2018-07-06 | Didion Mfg Co | Multi directional rifling and multi flow variable speed rifling for liner segments for crushers, reclaimers, separators and cleaners for products. |
| CN108405092A (en) * | 2018-05-25 | 2018-08-17 | 达州市唐氏铸钢有限公司 | A kind of interior structure of high-efficiency cement mill mill |
| CN109702632A (en) * | 2018-12-18 | 2019-05-03 | 程郎 | A kind of arbitrary shape metal surface treatment process |
| CN113977427B (en) * | 2021-11-06 | 2022-08-23 | 江苏彭中科技发展有限公司 | Lace-containing part polishing device for construction machinery equipment |
| CN117548193B (en) * | 2023-11-09 | 2024-05-03 | 江苏中基鸿业矿业科技有限公司 | A ball mill for quartz sand |
| CN119175140B (en) * | 2024-11-25 | 2025-03-07 | 株洲长江特种材料有限公司 | Lining of ball mill and auxiliary fixing device thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE155919C (en) * | ||||
| GB200220A (en) * | 1922-04-11 | 1923-07-11 | George Thomas Mitchell | Improvements in grinding plates for tubular ball mills |
| DE1126709B (en) * | 1960-08-26 | 1962-03-29 | Miag Muehlenbau & Ind Gmbh | Rohrmühle |
| US3599827A (en) * | 1967-12-19 | 1971-08-17 | Trelleborgs Gummifabriks Ab | Methods of providing walls with wear-resistant linings |
| DE8912950U1 (en) * | 1989-09-26 | 1990-01-04 | Interthal, Arno, 6347 Angelburg | Device for rounding and smoothing broken and/or shaped rock |
-
1994
- 1994-11-30 SE SE9404159A patent/SE503673C2/en not_active IP Right Cessation
-
1995
- 1995-11-13 EP EP95850200A patent/EP0714703B1/en not_active Expired - Lifetime
- 1995-11-13 ES ES95850200T patent/ES2143610T3/en not_active Expired - Lifetime
- 1995-11-13 DE DE69514996T patent/DE69514996T2/en not_active Expired - Fee Related
- 1995-11-28 KR KR1019950044223A patent/KR100400439B1/en not_active Expired - Fee Related
- 1995-11-28 MX MX9504956A patent/MX9504956A/en unknown
- 1995-11-29 TW TW084112688A patent/TW372905B/en active
- 1995-11-29 JP JP31067095A patent/JP3616182B2/en not_active Expired - Lifetime
- 1995-11-29 AR AR10035895A patent/AR002457A1/en unknown
- 1995-11-30 BR BR9505598A patent/BR9505598A/en not_active IP Right Cessation
- 1995-11-30 CN CN95121887A patent/CN1071622C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| SE9404159D0 (en) | 1994-11-30 |
| CN1133220A (en) | 1996-10-16 |
| KR960016971A (en) | 1996-06-17 |
| BR9505598A (en) | 1997-11-04 |
| AR002457A1 (en) | 1998-03-25 |
| JPH08206526A (en) | 1996-08-13 |
| EP0714703A1 (en) | 1996-06-05 |
| CN1071622C (en) | 2001-09-26 |
| ES2143610T3 (en) | 2000-05-16 |
| DE69514996T2 (en) | 2000-06-08 |
| DE69514996D1 (en) | 2000-03-16 |
| KR100400439B1 (en) | 2003-12-18 |
| JP3616182B2 (en) | 2005-02-02 |
| TW372905B (en) | 1999-11-01 |
| SE9404159L (en) | 1996-05-31 |
| EP0714703B1 (en) | 2000-02-09 |
| MX9504956A (en) | 1997-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |