DK171507B1 - Apparatus for expanding paticular tobacco material - Google Patents
Apparatus for expanding paticular tobacco material Download PDFInfo
- Publication number
- DK171507B1 DK171507B1 DK672887A DK672887A DK171507B1 DK 171507 B1 DK171507 B1 DK 171507B1 DK 672887 A DK672887 A DK 672887A DK 672887 A DK672887 A DK 672887A DK 171507 B1 DK171507 B1 DK 171507B1
- Authority
- DK
- Denmark
- Prior art keywords
- screen
- housing
- separator
- gaseous medium
- sections
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/18—Other treatment of leaves, e.g. puffing, crimpling, cleaning
- A24B3/182—Puffing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/60—Devices for separating the materials from propellant gas
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Means For Separation Of Solids (AREA)
- Manufacture Of Tobacco Products (AREA)
- Manufacturing Of Cigar And Cigarette Tobacco (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
Description
i DK 171507 B1in DK 171507 B1
Den foreliggende opfindelse angår et ekspanderingsapparat til ekspandering af partikelformigt tobaksmateriale.The present invention relates to an expander apparatus for expanding particulate tobacco material.
Ekspanderingsapparatet omfatter et organ til tilførsel af 5 et varmt gasformigt medium, som kan anvendes til tilførsel af dette i varm tilstand, forbundet med opstrømsenden af en transportkanal med organer til tilførsel af partikelf ormigt tobaksmateriale og en separator af en type svarende til den, der er beskrevet i GB-patentskrift nr.The expanding apparatus comprises a means for supplying a hot gaseous medium which can be used for supplying it in hot state, connected to the upstream end of a conveying channel with means for supplying particulate tobacco material and a separator of a type similar to that which is present. described in GB patent no.
10 1 575 175 og US-patentskrift nr. 3 588 644 omfattende et hus med en med transportkanalens nedstrømsende forbundet indgang for det gasformige medium, en i hovedsagen modsat denne anbragt udgang for det gasformige medium, en gas-gennemtrængelig separationssigte, der strækker sig tværs 15 over husets indre, således at ind- og udgangen for det gasformige medium findes på hver sin side af sigten samt en udgang for vegetabilsk materiale anbragt på samme side af sigten som indgangen for det gasformige medium. Et ekspansionsapparat af denne art beskrives i det følgende 20 som et apparat af den i krav l's indledning angivne art.No. 10,575,175 and U.S. Patent No. 3,588,644 comprising a housing having an inlet of the conveyor channel downstream of the gaseous medium, a substantially opposite outlet of the gaseous medium, a gas-permeable separation screen extending transversely 15 over the interior of the housing so that the inlet and outlet of the gaseous medium are located on either side of the screen and an outlet for vegetable material located on the same side of the screen as the entrance of the gaseous medium. An expansion apparatus of this kind is hereinafter described as an apparatus of the kind set forth in claim 1.
I sådant apparat var separationssigten, af hensyn til rensning og reparation, anbragt således, at den er glid-bart bevægelig til og fra driftspositionen. Med dette 25 formål for øje blev monteringen af sigten foretaget ved hjælp af aflange monteringskonsolplader fastgjort på separatorhusets indre overflader. Når sigten var anbragt i driftspositionen strakte monteringskonsolpladerne sig langs og over sigtens rande, idet et sæt konsolplader be-30 fandt sig over, et andet under sigten. Apparatet blev anvendt til ekspandering af partikelformig tobak og var effektivt til dette formål. Når apparatet arbejdede med en temperatur for den fugtige luft ved indgangen til transportkanalen på eller over 350 eC, konstateredes 35 imidlertid en driftsmæssig ulempe. Denne ulempe manifesterede sig ved at det ud fra separatoren kommende materiale indeholdt klumper af stærkt ristet materiale. Ikke DK 171507 B1 2 sjældent var materialet endog brændende. En sådan ulempe gør anvendelsen af det ovenfor omtalte apparat mindre kommercielt acceptabelt.In such apparatus, the separation screen, for purification and repair purposes, was arranged so as to be slidably movable to and from the operating position. For this purpose, mounting of the sieve was done by means of elongated mounting bracket plates fixed to the inner surfaces of the separator housing. Once the sieve was positioned in the operating position, the mounting bracket plates extended along and above the rim of the sieve, with one set of bracket plates overlying, another below the sieve. The apparatus was used for the expansion of particulate tobacco and was effective for this purpose. However, when the apparatus was operating at a temperature of the humid air at the entrance to the conveyor channel at or above 350 eC, an operating disadvantage was found. This disadvantage was manifested in the fact that the material coming from the separator contained lumps of highly shredded material. Not rarely was the material even burning. Such a disadvantage makes the use of the apparatus mentioned less commercially acceptable.
5 Fra DE 36 19 816 Al kendes en fremgangsmåde til ekspandering af tobak, hvorved der opretholdes en strøm af et varmt gasformigt medium 1 en transportledning, og snittet tobak indføres i ledningen og behandles med et ekspansionsmiddel. Tobak og medium adskilles fra hinanden ned-10 efter i strømretningen af ledningen. En indretning til at gennemføre denne fremgangsmåde omfatter et skilleorgan med en gasgennemtrængelig skillesigte, der strækker sig på tværs af de indre rum af skilleapparatets hus. Tilførselsrør og udtømningsrør for det gasformige medium er så-15 ledes udformet, at de sidder på hver sin side af sigten.5 From DE 36 19 816 A1 a method for expanding tobacco is known, whereby a flow of hot gaseous medium 1 is maintained in a transport line and cut tobacco is introduced into the line and treated with an expansion agent. Tobacco and medium are separated from each other downwards in the direction of flow of the cord. An apparatus for carrying out this method comprises a separating means having a gas-permeable separating screen extending across the inner compartments of the separator housing. Supply pipes and discharge pipes for the gaseous medium are thus designed to sit on either side of the screen.
Et udtag eller udtømningsrør for tobak er anbragt på samme side af skillesigten som for det gasformige medium.A tobacco outlet or discharge tube is disposed on the same side of the separating screen as for the gaseous medium.
Selve skillesigten består af sigtemasker. Den egentlige udformning af skillesigten, herunder hvorledes eller om 20 det er muligt at forhindre en vedhængning af tobaksmateriale og blokering af sigten, fremgår ikke af dette trykskrift.The divider itself consists of sieve masks. The actual design of the separating screen, including how or if it is possible to prevent the adherence of tobacco material and the blocking of the screen, does not appear in this publication.
Den foreliggende opfindelse angår et ekspanderingsapparat 25 af den i indledningen til krav 1 angivne art, som er ejendommeligt ved i den kendetegnende del af krav 1 anførte.The present invention relates to an expansion apparatus 25 of the kind set forth in the preamble of claim 1, which is characterized by the characterizing part of claim 1.
Apparatet ifølge opfindelsen har fortrinsvis luftsluser, 30 hvis indgang er forbundet med separatorens udgang for vegetabilsk materiale.The apparatus of the invention preferably has air locks 30 whose input is connected to the output of the vegetable material separator.
Ved anvendelse af apparatet ifølge opfindelsen til ekspandering af partikelformig tobak kan de ovenfor nævnte 35 driftsulemper elimineres fuldstændigt.By using the apparatus according to the invention for expanding particulate tobacco, the above-mentioned 35 operating disadvantages can be completely eliminated.
I det følgende illustreres opfindelsen nærmere under hen- DK 171507 B1 3 visning til tegningen, hvor fig. 1 viser komponenterne af et tobaksekspanderingsapparat, og 5 fig. 2 i større målestok, viser en separator i det i fig.In the following, the invention is illustrated in more detail with reference to the drawing, in which fig. 1 shows the components of a tobacco expanding apparatus, and FIG. 2, on a larger scale, shows a separator in the embodiment of FIG.
1 viste apparat.1.
Det i fig. 1 viste apparat omfatter et tobaktilførselsor-10 gan 1, en skråt opadrettet transportkanal 2 og en separator 3. Tobakstilførselsorganet 1 omfatter en roterende luftsluse 4 forbundet med en tilførselstragt 5 og et ned-adrettet udtømningsrør 6, hvis nedre ende står i åben forbindelse med en kort, skråstillet del af et rør 7, 15 hvis indgangsende er forbundet med et tilførselsrør 8. Tilførselsrøret 8 udgør en del af et tilførselsorgan for gasformigt medium, som ellers ikke er vist, som kan tilføre fugtig luft ved en temperatur på eller over 350 *C.The FIG. 1, a tobacco supply means 1, an oblique upward transport channel 2 and a separator 3. The tobacco supply means 1 comprises a rotary air lock 4 connected to a supply funnel 5 and a downwardly discharged discharge pipe 6, the lower end of which is openly connected with a a short, inclined portion of a pipe 7, 15 whose entrance end is connected to a supply pipe 8. The supply pipe 8 forms part of a gaseous medium supply means, which is not otherwise shown, which can supply moist air at a temperature of or above 350 * C.
20 Afgangsenden af røret 7 står i forbindelse med transportkanalen 2. Transportkanalen 2 har et rektangulært tværsnit, hvis mindste dimension ses i fig. 1. Den øvre afgangsende af kanalen 2 udmunder i et hus 9 tilhørende separatoren 3.20 The outlet end of the tube 7 communicates with the transport channel 2. The transport channel 2 has a rectangular cross section, the smallest dimension of which is seen in FIG. 1. The upper outlet end of channel 2 opens into a housing 9 of the separator 3.
2525
Et tobaksudgangsrør 10 strækker sig nedad fra den laveste del af separatoren 3 til en roterende luftsluse 11. Den nederste del af luftslusen 11 er forsynet med et udtømningsrør 12. Separatoren 3 har en luftudgangskanal 13 med 30 rektangulært tværsnit, som er anbragt i en mellemstor højde.A tobacco exit pipe 10 extends downward from the lowest part of the separator 3 to a rotating air lock 11. The lower part of the air lock 11 is provided with a discharge pipe 12. The separator 3 has an air outlet duct 13 of 30 rectangular cross-section which is arranged at a medium height. .
Tværs over den indre del af huset 9 i separatoren 3 strækker sig en skråt nedadhældende separationssigte 14, 35 der er udformet som en tynd rektangulær plade af rustfrit stål, der er gjort gasgennemtrængelig ved hjælp af mikro-perforeringer, typisk i form af huller med en diameter på DK 171507 B1 4 0,8 mm. Med henblik på tilvejebringelse af løsbar montering af sigten 14 i huset 9 er huset 9 ved sigtens plan opdelt i øvre og nedre hussektioner 15 og 16. Langs mundingerne af hver af sektionerne 15 og 16 strækker der sig 5 en ydre fastgørelsesflange. Dele af disse flanger, udstrækker sig ved den øvre væg af huset 9, er i fig. 2 betegnet med referencetallene 17 og 18, og de dele, der udstrækker sig ved endevæggen af huset 9 er angivet ved referencetal 19 og 20. Den resterende (ikke viste) del af 10 flangerne i hussektionerne 15 og 16 findes på de forreste og bagerste sidevægge af huset 9.Across the inner portion of housing 9 in separator 3 extends a sloping downwardly sloping screen 14, 35 formed as a thin rectangular stainless steel plate gas-permeable by micro-perforations, typically in the form of holes having a diameter of DK 171507 B1 4 0.8 mm. In order to provide detachable mounting of the screen 14 in the housing 9, the housing 9 is divided by the screen of the screen into upper and lower housing sections 15 and 16. Along the mouths of each of sections 15 and 16, an outer fastening flange extends. Parts of these flanges extending at the upper wall of the housing 9 are shown in FIG. 2 designated by reference numerals 17 and 18, and the portions extending at the end wall of housing 9 are indicated by reference numerals 19 and 20. The remaining (not shown) portion of the 10 flanges in housing sections 15 and 16 are located on the front and rear side walls. of the housing 9.
Som vist i fig. 2 strækker sigten 14 sig ud mellem de ydre fastgørelsesflanger på hussektionerne 15 og 16. Fast-15 gørelsesorganer holder de øvre og nedre flanger i fast kontakt med de mellemliggende dele af sigten 14. Fastgørelsesorganerne omfatter bolte 21 og 22, jævnfør fig. 2, som går gennem tilsvarende huller i flangerne og sigtens randområder. Om ønsket kan der tilvejebringes forøget 20 gastæthed ved anvendelse af forseglingspakninger anbragt mellem flangerne, en over og en under sigten.As shown in FIG. 2, the screen 14 extends between the outer fastening flanges of the housing sections 15 and 16. Fastening means keep the upper and lower flanges in fixed contact with the intermediate parts of the screen 14. The fastening means comprise bolts 21 and 22, cf. 2, which passes through corresponding holes in the flanges and the rim areas of the screen. If desired, increased gas density can be provided by using sealing gaskets placed between the flanges, one above and one below the sieve.
Referencetallene 23-25 i fig. 2 betegner stænger, som afstiver sigten, og som strækker sig på tværs og er fast-25 gjort til den bagerste side af sigten 14.The reference numbers 23-25 in FIG. 2 denotes bars which brace the screen and extend transversely and are attached to the rear side of the screen 14.
Mikroperforeringerne i separationssigten 14 er fordelt over hele gasstrømningstværsnittet af huset 9 i separatoren 3, således at det perforerede areal af sigten 14 30 strækker sig helt op til væggene i huset 9. På grund af den udvendige "sandwich-monteringsform" af sigten 14 i huset 9 er den opstrømsside af sigten (set i gasstrømningens retning) 14 uhindret helt op til væggene i huset 9.The micro perforations in the separation screen 14 are distributed over the entire gas flow cross-section of the housing 9 in the separator 3, so that the perforated area of the screen 14 30 extends all the way up to the walls of the housing 9. Due to the external "sandwich mounting" of the screen 14 in the housing. 9, the upstream side of the screen (seen in the direction of the gas flow) 14 is unobstructed right up to the walls of the housing 9.
Ved "uhindret" forstås, at der ikke findes nogen hindrin-35 ger på den opstrøms side af sigten, hvor tobakken kan opfanges og fastholdes og derfor blive overopvarmet eller . brændt.By "unimpeded" is meant that there are no obstructions on the upstream side of the screen where the tobacco can be captured and retained and therefore overheated or. burnt.
DK 171507 B1 5DK 171507 B1 5
Ved anvendelse af det ovenfor beskrevne tobaksekspanderingsapparat konstateredes Intet ristet eller brændende materiale kommende fra udtømningsrøret 12, selv når der gennem tilførselsrøret 8 blev indført fugtig luft ved en 5 temperatur på eller over 350 °C.Using the tobacco expansion apparatus described above, no roasted or burning material coming from the discharge tube 12 was found even when moist air was introduced through the feed tube 8 at a temperature of or above 350 ° C.
Skønt man fortrinsvis anvender en mikroperforeret metalplade som separationssigte i tobak/luft-separatoren, kan man også anvende en sigte af trådnet. Hvis man anvender 10 en sigte af trådnet, er de mellem separatorhusets flanger anbragt randområder af sigten fortrinsvis udformet som en almindelig plan flade. Dette kan tilvejebringes ved anbringelsen af trådsigten i en flad metalramme, idet konstruktionen er foretaget således, at trådnettet på den 15 opstrømsside strækker sig helt op til separatorhusets vægge.Although preferably a microperforated metal plate is used as a separation screen in the tobacco / air separator, a screen of wire mesh can also be used. If a screen of wire mesh 10 is used, the edge regions of the screen between the flanges of the separator housing are preferably formed as a plain planar surface. This can be provided by placing the wire screen in a flat metal frame, the construction being such that the wire mesh on the upstream side extends all the way up to the walls of the separator housing.
Separatorskærmen kan også være udformet med spalteformede åbninger. En egnet sigte af denne art markedsføres af 20 Greening Limited, Warrington, England under handelsnavnet Wedge Wire. Disse sigter omfatter en række parallelt anbragte stave, som er indbyrdes forbundet med sidelængs gående fastgørelsestråde. Anvendt i det her omhandlede apparat bør en sådan sigte anbringes i separatoren, såle-25 des at fastgørelsestrådene findes på den nedstrøms side af sigten.The separator screen may also be formed with slot-shaped openings. A suitable sieve of this kind is marketed by 20 Greening Limited, Warrington, England under the trade name Wedge Wire. These sieves comprise a series of parallel spaced rods, which are interconnected with laterally attached fastening strands. Used in the present apparatus, such a sieve should be placed in the separator so that the securing wires are located on the downstream side of the sieve.
Skønt den i fig. 1 og 2 viste sigte 14 er flad, kan sigten, og derfor også adskillelseslinien mellem hussektio-30 nerne 15 og 16, være udformet konvekst, set fra den opstrøms side. Det er indlysende, at sigten ikke blot kan holdes i position mellem udvendige fastgørelsesflanger på den øverste og nederste hussektion, men også mellem en flange på en sektion og en væg på den anden sektion i 35 huset eller alternativt mellem væggene i begge sektioner af huset, således at der ikke kræves udvendige flanger.Although in FIG. 1 and 2, the screen 14 is flat, the screen, and therefore also the separation line between the housing sections 15 and 16, can be convex, seen from the upstream side. It is obvious that the sieve can be held not only between exterior fastening flanges on the upper and lower housing sections, but also between a flange on one section and a wall on the other section of the housing or alternatively between the walls of both sections of the housing, so that no external flanges are required.
Det er også muligt, at en sigte, der opfylder opfindel- 6 DK 171507 B1 sens formål, kan anbringes på passende vis på den Indvendige side af et separatorhus, som ikke er opdelt i to dele.It is also possible that a screen meeting the purpose of the invention may be suitably placed on the inside of a separator housing which is not divided into two parts.
5 10 15 20 25 30 355 10 15 20 25 30 35
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8630656 | 1986-12-22 | ||
GB868630656A GB8630656D0 (en) | 1986-12-22 | 1986-12-22 | Expansion of particulate vegetable material |
Publications (3)
Publication Number | Publication Date |
---|---|
DK672887D0 DK672887D0 (en) | 1987-12-21 |
DK672887A DK672887A (en) | 1988-06-23 |
DK171507B1 true DK171507B1 (en) | 1996-12-09 |
Family
ID=10609446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK672887A DK171507B1 (en) | 1986-12-22 | 1987-12-21 | Apparatus for expanding paticular tobacco material |
Country Status (19)
Country | Link |
---|---|
JP (1) | JPS63166472A (en) |
AU (1) | AU599176B2 (en) |
BE (1) | BE1000541A3 (en) |
BR (1) | BR8707064A (en) |
CA (1) | CA1327738C (en) |
CH (1) | CH676329A5 (en) |
DE (1) | DE3742911C2 (en) |
DK (1) | DK171507B1 (en) |
ES (1) | ES2006001A6 (en) |
FI (1) | FI875605A (en) |
GB (2) | GB8630656D0 (en) |
HK (1) | HK50891A (en) |
IN (1) | IN170573B (en) |
IT (1) | IT1223544B (en) |
MY (1) | MY101948A (en) |
NL (1) | NL8703035A (en) |
NZ (1) | NZ222862A (en) |
SG (1) | SG41391G (en) |
ZA (1) | ZA879309B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8712618D0 (en) * | 1987-05-28 | 1987-07-01 | British American Tobacco Co | Expansion of tobacco |
DE4117329A1 (en) * | 1991-05-27 | 1992-12-03 | Bat Cigarettenfab Gmbh | DRYING METHOD FOR INCREASING THE FILLABILITY OF TOBACCO MATERIAL AND DEVICE FOR IMPLEMENTING THIS METHOD |
DE19855030A1 (en) * | 1998-11-28 | 2000-05-31 | Mann & Hummel Protec Gmbh | Conveying device for bulk goods with retention device for coarse fraction |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB957767A (en) * | 1962-04-11 | 1964-05-13 | Tmm Research Ltd | Apparatus separating textile fibres from a fibre-conveying airstream |
US3580644A (en) * | 1969-03-04 | 1971-05-25 | Brown & Williamson Tobacco | Pneumatic feed system for uniform supply of tobacco to cigarette making machines |
CH595469A5 (en) * | 1976-02-27 | 1978-02-15 | Rieter Ag Maschf | |
GB1575175A (en) * | 1978-05-05 | 1980-09-17 | Hambro Machinery Ltd | Separation apparatus |
US4280903A (en) * | 1980-08-06 | 1981-07-28 | Brown & Williamson Tobacco Corporation | Apparatus for separating sand from botanical fines |
GB8515217D0 (en) * | 1985-06-15 | 1985-07-17 | British American Tobacco Co | Treatment of tobacco |
DK172024B1 (en) * | 1987-07-29 | 1997-09-22 | Bat Cigarettenfab Gmbh | Separator for separating small pieces of tobacco from a tobacco/gas mixture |
-
1986
- 1986-12-22 GB GB868630656A patent/GB8630656D0/en active Pending
-
1987
- 1987-12-09 IN IN888/MAS/87A patent/IN170573B/en unknown
- 1987-12-10 ZA ZA879309A patent/ZA879309B/en unknown
- 1987-12-10 GB GB8728920A patent/GB2198968B/en not_active Expired - Lifetime
- 1987-12-10 NZ NZ222862A patent/NZ222862A/en unknown
- 1987-12-10 CA CA000554066A patent/CA1327738C/en not_active Expired - Fee Related
- 1987-12-11 MY MYPI87003183A patent/MY101948A/en unknown
- 1987-12-15 AU AU82560/87A patent/AU599176B2/en not_active Ceased
- 1987-12-15 NL NL8703035A patent/NL8703035A/en not_active Application Discontinuation
- 1987-12-17 CH CH4932/87A patent/CH676329A5/fr unknown
- 1987-12-17 DE DE3742911A patent/DE3742911C2/en not_active Expired - Fee Related
- 1987-12-18 FI FI875605A patent/FI875605A/en not_active Application Discontinuation
- 1987-12-18 JP JP62321134A patent/JPS63166472A/en active Granted
- 1987-12-18 IT IT23103/87A patent/IT1223544B/en active
- 1987-12-21 BR BR8707064A patent/BR8707064A/en not_active IP Right Cessation
- 1987-12-21 ES ES8703658A patent/ES2006001A6/en not_active Expired
- 1987-12-21 DK DK672887A patent/DK171507B1/en not_active IP Right Cessation
- 1987-12-22 BE BE8701470A patent/BE1000541A3/en not_active IP Right Cessation
-
1991
- 1991-05-29 SG SG413/91A patent/SG41391G/en unknown
- 1991-07-04 HK HK508/91A patent/HK50891A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
IN170573B (en) | 1992-04-11 |
SG41391G (en) | 1991-07-26 |
AU599176B2 (en) | 1990-07-12 |
FI875605A0 (en) | 1987-12-18 |
NL8703035A (en) | 1988-07-18 |
GB2198968B (en) | 1991-03-06 |
JPS63166472A (en) | 1988-07-09 |
FI875605A (en) | 1988-06-23 |
CH676329A5 (en) | 1991-01-15 |
CA1327738C (en) | 1994-03-15 |
DE3742911A1 (en) | 1988-06-30 |
GB8630656D0 (en) | 1987-02-04 |
GB8728920D0 (en) | 1988-01-27 |
AU8256087A (en) | 1988-06-23 |
ES2006001A6 (en) | 1989-04-01 |
IT1223544B (en) | 1990-09-19 |
MY101948A (en) | 1992-02-15 |
NZ222862A (en) | 1989-09-27 |
ZA879309B (en) | 1988-06-06 |
JPH0346195B2 (en) | 1991-07-15 |
DK672887A (en) | 1988-06-23 |
BR8707064A (en) | 1988-08-02 |
IT8723103A0 (en) | 1987-12-18 |
GB2198968A (en) | 1988-06-29 |
DK672887D0 (en) | 1987-12-21 |
DE3742911C2 (en) | 1994-07-14 |
HK50891A (en) | 1991-07-12 |
BE1000541A3 (en) | 1989-01-24 |
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Date | Code | Title | Description |
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B1 | Patent granted (law 1993) | ||
PBP | Patent lapsed |