DK148900B - PLANT FOR SUCCESS TRANSPORT OF WASTE MATERIALS - Google Patents
PLANT FOR SUCCESS TRANSPORT OF WASTE MATERIALS Download PDFInfo
- Publication number
- DK148900B DK148900B DK270479AA DK270479A DK148900B DK 148900 B DK148900 B DK 148900B DK 270479A A DK270479A A DK 270479AA DK 270479 A DK270479 A DK 270479A DK 148900 B DK148900 B DK 148900B
- Authority
- DK
- Denmark
- Prior art keywords
- transport
- waste material
- trunk line
- air
- branch lines
- Prior art date
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Classifications
-
- 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
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/24—Gas suction systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F5/00—Gathering or removal of refuse otherwise than by receptacles or vehicles
- B65F5/005—Gathering or removal of refuse otherwise than by receptacles or vehicles by pneumatic means, e.g. by suction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Refuse Collection And Transfer (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Threshing Machine Elements (AREA)
- Processing Of Solid Wastes (AREA)
Description
i 148900in 148900
Den foreliggende opfindelse angår et anlæg til sugetransport af affaldsmateriale fra flere lokale opsamlingspladser til en central deponeringsplads, hvor affaldsmaterialet kontinuerligt opsuges i grenledninger ved opsamlings-5 pladserne og overføres til en fælles stamledning, til hvilket rørsystem der er tilsluttet en transportluftblæser, der frembringer en strøm af transportluft gennem grenledningerne og stamledningen, som er indrettet til at transportere affaldsmaterialet til den centrale deponeringsplads, 1o Det er velkendt f.eks. indenfor bearbejdende indu strier at slutte maskiner i et værkstedslokale til et sugetransportsystem for at opsamle affaldet, som dannes ved bearbejdningen, og transportere det til en central deponeringsplads. Herved forhindrer man, at affaldet spredes i 15 luften, hvilket medfører et væsentligt forbedret arbejdsmiljø. Specielt indenfor træbearbejdende industrier er anlæg af den ovenfor nævnte art blevet anvendt i stor udstrækning.The present invention relates to a plant for suction transport of waste material from several local collection sites to a central landfill site, where the waste material is continuously sucked into branch lines at the collection sites and transferred to a common trunk line to which piping is connected to a transport air blower which generates a flow. of transport air through the branch lines and trunk line, which is arranged to transport the waste material to the central landfill site. in the processing industry, machinery in a workshop room connects to a suction transport system to collect the waste generated during processing and transport it to a central landfill site. This prevents the waste from spreading in the air, which results in a significantly improved working environment. Especially in the woodworking industry, plants of the kind mentioned above have been widely used.
Der findes flere ulemper ved dette kendte arrangement. Eftersom affaldsmaterialet transporteres hele vejen fra den 2o lokale opsamlingsplads og til den centrale deponeringsplads først gennem relativt smalle grenledninger og derefter gennem en forholdsvis svær stamledning, skal lufthastighederne i samtlige dele af anlægget være afpasset således, at de også er i stand til at transportere affaldsmaterialet gennem den 25 svære stamledning. I de afsnit, hvor en eller flere grenledninger sluttes til stamledningen, skal dennes dimensioner følgelig ændres, for at lufthastigheden skal bibeholdes i hovedsagen konstant ved forøget luftmængde. Anlægget skal altså dimensioneres efter det maksimale antal tilsluttede 3o og samtidigt arbejdende maskiner. Dette medfører, at hidtil kendte anlæg ikke tillader nogen fleksibilitet, men kun kan anvendes til et fra begyndelsen projekteret antal maskiner med en bestemt given placering. En afvigelse fra den ved projekteringen antagne maskininstallation kan få store kon-35 sekvenser, eftersom anlægget i så fald skal bygges om for på en akceptabel måde at kunne opfylde de krav, man fra begyn- 148900 2 delsen mente, at anlægget skulle opfylde. Man kan altså ikke ved hidtil kendte anlæg på enkel måde tilslutte en maskine til stam-ledningen hvor som helst, idet dette alvorligt påvirker sugeevnen i grenledningerne fra de øvrige maskiner, som er sluttet 5 til systemet.There are several disadvantages to this known arrangement. Since the waste material is transported all the way from the 2o local collection site and to the central landfill site first through relatively narrow branch lines and then through a relatively heavy trunk line, the air velocities in all parts of the plant must be adapted so that they are also capable of transporting the waste material through the 25 heavy trunk line. Accordingly, in the sections where one or more branch lines are connected to the trunk line, its dimensions must be changed in order that the air velocity must be maintained substantially at constant air flow. The system must therefore be dimensioned according to the maximum number of connected 3o and simultaneously working machines. This means that previously known plants do not allow any flexibility, but can only be used for a number of machines initially designed with a specific given location. A deviation from the machine installation assumed during the design can have major consequences, since in that case the plant must be rebuilt in order to meet in an acceptable way the requirements that the plant initially considered to meet. Thus, it is not possible to connect a machine to the trunk line in a simple way in known systems anywhere, since this seriously affects the suction capacity of the branch lines from the other machines connected to the system.
En anden ulempe ved hidtil kendte systemer er, at man for at spare energi lader den rensede og filtrerede transportluft strømme frit ud i lokalet, eftersom det ville være alt for kostbart at lade den varme og udsugede lokaleluft strømme ud 1o til yderluften. Selv om man antager, at udskillelsesgraden efter separering og filtrering er i størrelsesordenen 98%, medfører det dog, at 2% af affaldsmaterialet strømmer tilbage i lokalet, og der kan derfor efterhånden ske en koncentrering af partikler i luften, som medfører problemer for de personer, 15 som opholder sig i lokalet.Another disadvantage of previously known systems is that in order to save energy, the purified and filtered transport air is allowed to flow freely into the room, as it would be too expensive to let the hot and exhausted room air flow out to the outer air. However, assuming that the separation rate after separation and filtration is on the order of 98%, it does mean that 2% of the waste material flows back into the room, and consequently a concentration of particles in the air can occur which causes problems for the persons. , 15 staying in the room.
En yderligere ulempe er det naturligvis, at såvel blæserkapaciteten som filterkapaciteten skal tilpasses efter det mest ugunstige transporttilfælde, så at affaldsmateriale i alle dele af anlægget kan transporteres videre til deponerings-2o pladsen. Dette medfører, at både transportblæserne og filtrene skal være kraftigt overdimensionerede, hvilket igen medfører, at energiforbruget bliver forholdsvis stort.A further disadvantage, of course, is that both the fan capacity and the filter capacity must be adapted to the most unfavorable transport case, so that waste material in all parts of the plant can be transported to the landfill-2 space. This means that both the transport fans and filters must be greatly oversized, which in turn causes the energy consumption to be relatively large.
Formålet med anlægget ifølge den foreliggende opfindelse er at eliminere samtlige disse ulemper og samtidigt at mu-25 liggøre en fleksibel tilpasning af et sugetransportsystem efter det aktuelle behov, uden at man behøver at ændre transport ledningernes dimensioner. Desuden er det et formål at forhindre, at affaldsmateriale føres tilbage til lokalet via returluften.The purpose of the system according to the present invention is to eliminate all these disadvantages and at the same time to allow a flexible adaptation of a suction transport system according to the current need, without having to change the dimensions of the transport lines. Furthermore, it is an object to prevent waste material from being returned to the room via the return air.
3o Disse formål opfyldes ved et anlæg, som er ejendommeligt ved, at grenledningernes og stamledningens dimensioner er valgt således, at lufthastigheden i grenledningerne er tilstrækkelig til transport af affaldsmaterialet, medens lufthastigheden i stamledningen er så lav, at hovedpar-35 ten af materialet vil udskilles og opsamles, samt at der findes transportmidler, som er tilknyttet stamledningen og ind- 148900 3 rettet til at føre affaldsmaterialet gennem denne til den centrale deponeringsplads.These objects are met by a plant which is characterized in that the dimensions of the branch lines and the trunk line are chosen so that the air velocity in the branch lines is sufficient for transporting the waste material, while the air velocity in the trunk line is so low that the main part of the material will be separated. and is collected, and there are means of transport connected to the trunk line and arranged to pass the waste material through it to the central landfill.
Transportmidlerne kan udgøres af en mekanisk transportør ellet et transportfluid, gas- eller væskeformigt, som 5 bringes til at strømme gennem stamledningen, når tilstrækkeligt med affaldsmateriale er udfældet deri.The means of transport can be constituted by a mechanical conveyor or a transport fluid, gaseous or liquid, which is caused to flow through the trunk line when sufficient waste material has precipitated therein.
En hensigtsmæssig udførelsesform for anlægget ifølge opfindelsen er ejendommelig ved, at transportluftblæseren er sluttet til stamledningen ved dennes afgangsende og dimen-1o sioneret til at frembringe den for materialetransporten i grenledningerne nødvendige lufthastighed, samt at styreorganer er indrettet til at afføle undertrykket i stamledningen og påvirke transportblæserens hastighed og/eller den ind- eller udgående mængde af transportluft på en sådan måde, at under-1 5 trykket i stamledningen og dermed trykfaldet over grenledningerne holdes tilnærmelsesvis konstant. Herved muliggøres en momentan tilpasning til antallet af tilsluttede maskiner, som er i drift, og hvor tilhørende sugetransportgrenledninger er i funktion. Disse egenskaber ved anlægget ifølge opfin-2o delsen medfører betydelige fordele i form af dels et forbedret arbejdsmiljø og dels sparet energi.A convenient embodiment of the system according to the invention is characterized in that the conveyor air blower is connected to the trunk line at its outlet end and dimensioned to produce the air velocity required for the material transport in the branch lines, speed and / or the amount of in or out of transport air in such a way that the under-pressure in the trunk line and thus the pressure drop across the branch lines is kept approximately constant. This allows an instantaneous adjustment to the number of connected machines that are in operation and where the associated suction conveyor lines are operating. These features of the plant according to the invention bring significant advantages in the form of an improved working environment and partly saved energy.
Opfindelsen skal herefter forklares nærmere under henvisning til tegningen, hvor fig. 1 viser et skematisk tværsnit i en udførelses-25 form for anlægget ifølge opfindelsen med me kanisk transportør, fig. 2 et skematisk billede i plan af et anlæg ifølge opfindelsen i et lokale med flere opsamlings-pladser, som via grenledninger er sluttet til 3o en stamledning med en transportør ifølge fig. 1, og fig. 3 ligeledes et billede i plan over en udførelsesform for anlægget ifølge opfindelsen, hvor transporten i stamledningen besørges 35 ved hjælp af luft.The invention will now be explained in more detail with reference to the drawing, in which fig. 1 is a schematic cross-sectional view of an embodiment of the system of the invention with mechanical conveyor; FIG. 2 is a schematic plan view of a plant according to the invention in a room with multiple collection locations connected via branch lines to a stem line with a conveyor according to FIG. 1, and FIG. 3 is also a plan view of an embodiment of the plant according to the invention, in which the transport in the trunk line is provided by air.
Sugetransportanlægget i fig. 1 er bestemt til at transportere affaldsmateriale fra bearbejdende maskiner af en eller anden slags, eksempelvis træbearbejdningsmaskiner, hvorfra affaldet skal bortføres. I figuren er kun vist én 148900 4 opsamlingsplads 1, som altså indbefatter en hætte 2, der' indesluttet den bearbejdende maskine, hvorfra affaldsmaterialet via en grenledning 3 transporteres til en stamled-ning 4. Grenledningen 3 er over et spjæld 5 sluttet til 5 hætten 2, og dette spjæld kan styres enten manuelt eller ved hjælp af mikroafbrydere 6, som er anbragt således, at når maskinen sættes i drift, åbnes spjældet 5 automatisk og lukkes, når maskinen tages ud af drift.The suction conveyor system of FIG. 1 is intended to transport waste material from processing machines of some kind, for example woodworking machines from which the waste is to be removed. In the figure, only one collection location 1 is shown, which includes a cap 2, which encloses the machining machine, from which the waste material is transported via a branch line 3 to a trunk line 4. The branch line 3 is connected to the cap via a damper 5 2, and this damper can be controlled either manually or by means of microswitches 6, which are arranged so that when the machine is put into operation, the damper 5 is automatically opened and closed when the machine is taken out of service.
Sugetransporten i grenledningen 5 fra hætten 2 og lo til stamledningen 4 besørges ved hjælp af en transportblæser 7, som altså frembringer et undertryk i stamledningen og en til stamledningen sluttet central deponeringsplads 8 for affaldsmaterialet. Undertrykket afføles ved hjælp af en detektor 9, som over et styreorgan lo påvirker indstil-15 lingen af et spjæld 11 på transportblæseren 7's sugeside.The suction transport in the branch line 5 from the cap 2 and 10 to the stem line 4 is provided by means of a conveyor fan 7, which thus generates a negative pressure in the stem line and a central deposit space 8 for the waste material connected to the stem line. The negative pressure is sensed by means of a detector 9 which, over a control means 1o, influences the setting of a damper 11 on the suction side of the transport fan 7.
Ifølge opfindelsen er grenledningen 3's og stamledningen 4's dimensioner samt transportblæseren 7’s kapacitet valgt således, at lufthastigheden i enhver af grenledningerne er tilstrækkelig til at transportere affalds-2o materialet fra den under hætten 2 opstillede maskine til stamledningen 4. Lufthastigheden i stamledningen er imidlertid utilstrækkelig til at transportere affaldsmaterialet frem til den centrale deponeringsplads 8, og materialet vil derfor udskilles i stamledningen 4 og opsamles på 25 bunden af ledningen. Når en tilstrækkelig mængde affaldsmateriale er blevet opsamlet i stamledningen 4, transporteres det derfra ved hjælp af en mekanisk transportør 12, som kan være forsynet med skrabeorganer 13, der medbringer det på stamledningens bund opsamlede affaldsmateriale og 3o fører det til den centrale deponeringsplads 8.According to the invention, the dimensions of the branch conduit 3 and the main conduit 4, as well as the capacity of the conveyor fan 7, are chosen so that the air velocity in any of the branch conduits is sufficient to transport the waste-2 material from the machine under the hood 2 to the main conduit 4. However, the air velocity in the main conduit is insufficient to For example, the waste material is transported to the central landfill site 8, and the material will therefore be separated into the trunk 4 and collected on the bottom of the line. When a sufficient amount of waste material has been collected in the trunk line 4, it is transported therefrom by a mechanical conveyor 12 which may be provided with scraping means 13 which carry the waste material collected on the bottom of the trunk line and 3o it to the central landfill site 8.
De lette bestanddele, som af transportluften føres videre i stamledningen, udskilles i et filter 14. På grund af den lave lufthastighed i stamledningen 4, bliver det imidlertid kun en meget ringe del af alt affaldsmateriale, 35 som på denne måde behøver at udskilles, inden luften kan tillades igen at strømme frit i lokalet. En fordel ved dette arrangement er naturligvis, at slitagen på filtret bliver betydeligt mindre end ved et konventionelt anlæg, hvor 148900 5 affaldsmaterialet kontinuerligt'transporteres gennem stam-ledningen af transportluftstrømmen.The light constituents which are carried by the transport air into the mains line are separated in a filter 14. However, due to the low air velocity in the mains line 4, only a very small part of all waste material 35, which in this way needs to be separated, becomes separated. the air can be allowed to flow freely again in the room. An advantage of this arrangement is, of course, that the wear of the filter becomes considerably less than that of a conventional plant where the waste material is continuously transported through the trunk line of the transport air stream.
Det i fig. 2 viste planbillede af anlægget i fig. 1 giver kun en antydning af, hvorledes stamledningen 4 kan 5 være placeret i et lokale, hvor der findes flere opsamlingspladser 1 for bearbejdende maskiner af vilkårlig slags, som over grenledninger 3 er sluttet til stamledningen 4.The FIG. 2 is a plan view of the system of FIG. 1 only gives an indication of how the trunk line 4 can be located in a room, where there are several collection sites 1 for arbitrary machines, which are connected to the trunk line 4 over branch lines 3.
Hvis man i dette lokale vil installere yderligere en bearbejdende maskine, kan man på enkel måde indkoble yderlige-lo re en grenledning 3' over et lukkespjæld 5' til den hætte 2', som omslutter maskinen. Ved hjælp af den tidligere beskrevne styreudrustning for sugetransportanlægget vil detektoren 9 afføle et lavere undertryk i stamledningen 4 efter installationen end før, når samtlige maskiner er i drift.If an additional machining machine is to be installed in this room, an additional branch line 3 'over a closing damper 5' to the cap 2 'enclosing the machine can be simply connected. With the aid of the previously described control equipment for the suction conveyor system, the detector 9 will sense a lower negative pressure in the trunk line 4 after installation than before, when all machines are in operation.
15 Styreudrustningen lo vil så regulere spjældet 11's indstilling, således at det ønskede undertryk i stamledningen opnås. Samme regulering sker naturligvis, når en eller flere maskiner tages ud af drift, hvorved undertrykket i stamledningen 4 vokser med det resultat, at styreudrustningen 2o påvirker spjældet 11, således at det korrekte undertryk opnås.The control equipment 1o will then adjust the position of the damper 11 so that the desired negative pressure in the trunk line is obtained. Of course, the same regulation occurs when one or more machines are taken out of operation, whereby the negative pressure in the trunk line 4 grows, with the result that the control equipment 20 affects the damper 11 so that the correct negative pressure is obtained.
Det i fig. 3 viste anlæg omfatter en stamledning 4, hvortil der er sluttet flere maskiner 1, og i hvilken transporten af opsamlet affaldsmateriale sker ved hjælp af 25 en renblæsningsblæser 15, som over et spjæld 16 er sluttet til stamledningens ene ende. Renblæsningsblæseren suger yderluft, som transporterer affaldsmaterialet til den centrale opsamlingsplads, hvor transportluften og affaldet separeres i en cyklon 17, som også over et spjæld 18 er 3o sluttet til stamledningen. Denne type af anlæg kan hensigtsmæssigt anvendes ved allerede eksisterende sugetransportanlæg, hvor man har installeret en kraftig blæser, der tidligere sørgede for transporten fra de lokale opsamlingspladser. I stedet for et mekanisk transportsystem i stam-35 ledningen 4 udnytter man altså den gamle blæser til intermittent at blæse stamledningen ren. Eftersom den luft man udnytter til renblæsningen tages udefra og slippes ud i fri luft efter rensningen, bliver energibesparelsen med dette 148900 6 system i hovedsagen den samme sbm ved det tidligere beskrevne system. Iøvrigt stemmer dette anlæg overens med de anlæg, som er beskrevet i forbindelse med fig. 1 og 2. Naturligvis kan transportluftblæseren 7 i begge udførelses-5 former også reguleres på tryksiden og/eller omdrejnings-talsregulerés ved hjælp af styreorganer, som påvirkes af undertrykket i stamledhingen.The FIG. 3 comprises a trunk line 4 to which several machines 1 are connected and in which the transport of collected waste material is carried out by means of a purge blower fan 15, which is connected to one end of the trunk line via a damper 16. The purge blower blows outside air which transports the waste material to the central collection site, where the transport air and waste are separated in a cyclone 17 which is also connected to the trunk line via a damper 18. This type of system can conveniently be used with pre-existing suction conveyors where a powerful fan has been installed that previously provided transport from the local collection points. Thus, instead of a mechanical transport system in the trunk line 4, the old fan is used to intermittently blow the trunk line clean. Since the air utilized for the purge blow is taken from the outside and released into the open air after the purification, the energy saving with this system is essentially the same sbm with the previously described system. Moreover, this system corresponds to the systems described in connection with FIG. 1 and 2. Of course, in both embodiments, the conveyor air blower 7 can also be regulated on the pressure side and / or speed controlled by means of controls actuated by the negative pressure in the stem wire.
I stedet for at anvende luft som rensningsfluid som beskrevet i forbindelse med fig. 3 kan man naturligvis lo anvende en væske, eksempelvis vand, som med tilstrækkelig hastighed strømmer gennem stamledningen 4 og derved medbringer affaldsmaterialet til den centrale deponeringsplads.Instead of using air as a cleaning fluid as described in connection with FIG. 3, of course, a liquid can be used, for example water, which flows at sufficient velocity through the trunk line 4, thereby bringing the waste material to the central landfill site.
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7807239A SE412050C (en) | 1978-06-26 | 1978-06-26 | PLANT FOR SUGAR TRANSPORT OF WASTE MATERIAL |
| SE7807239 | 1978-06-26 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK270479A DK270479A (en) | 1979-12-27 |
| DK148900B true DK148900B (en) | 1985-11-11 |
| DK148900C DK148900C (en) | 1986-04-14 |
Family
ID=20335317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK270479A DK148900C (en) | 1978-06-26 | 1979-06-26 | PLANT FOR SUCCESS TRANSPORT OF WASTE MATERIALS |
Country Status (5)
| Country | Link |
|---|---|
| DE (1) | DE2925587C2 (en) |
| DK (1) | DK148900C (en) |
| FI (1) | FI67524C (en) |
| NO (1) | NO154008C (en) |
| SE (1) | SE412050C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE445909B (en) * | 1979-07-06 | 1986-07-28 | Flaekt Ab | PLANT FOR SUGAR TRANSPORT OF WASTE MATERIAL FROM A MULTIPLE LOCAL COLLECTION PLACES TO A COMMON WASTE DISPOSAL |
| FR2625484B1 (en) * | 1987-12-30 | 1990-06-08 | Kergadallan Pierre | PNEUMATIC TRANSPORTATION INSTALLATION, IN PARTICULAR FOR SUCTION DISCHARGE OF WASTE PRODUCED BY A PLURALITY OF MACHINES, SUCH AS WOOD MACHINES |
| DE3922163A1 (en) * | 1989-07-06 | 1991-01-17 | Trapo Stumpf Gmbh | CONVEYOR BELT |
| EP0427881A1 (en) * | 1989-11-13 | 1991-05-22 | Fritz Werner Industrie-Ausrüstungen GmbH | Method and device for controlling the volumetric stream of an air suction conveying installation |
| DE19517793A1 (en) * | 1995-05-15 | 1996-11-21 | Protekno Puzair Oy | Arrangement with a suction device for solids |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7211977A (en) * | 1972-09-01 | 1974-03-05 |
-
1978
- 1978-06-26 SE SE7807239A patent/SE412050C/en not_active IP Right Cessation
-
1979
- 1979-06-20 FI FI791964A patent/FI67524C/en not_active IP Right Cessation
- 1979-06-22 NO NO792102A patent/NO154008C/en unknown
- 1979-06-25 DE DE2925587A patent/DE2925587C2/en not_active Expired
- 1979-06-26 DK DK270479A patent/DK148900C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NO154008B (en) | 1986-03-24 |
| FI67524B (en) | 1984-12-31 |
| NO154008C (en) | 1986-07-02 |
| SE412050B (en) | 1980-02-18 |
| DK270479A (en) | 1979-12-27 |
| SE412050C (en) | 1986-03-30 |
| DE2925587C2 (en) | 1982-12-30 |
| FI67524C (en) | 1985-04-10 |
| SE7807239L (en) | 1979-12-27 |
| FI791964A (en) | 1979-12-27 |
| DE2925587A1 (en) | 1980-01-10 |
| NO792102L (en) | 1979-12-28 |
| DK148900C (en) | 1986-04-14 |
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