DK147846B - CARRIAGE TRANSPORTERS WITH A GUM, WHICH HAS A DEPARTURE, AND ABOUT CERTAIN BUNDS THERE MAY BE A NUMBER OF CARRIERS WHICH HAVE BEEN TAKEN TO A TRAGED AND SERVED TO PROTECT THE MATERIAL THROUGH THE RANGE AND WHEN IT WILL BE AVAILABLE OVER PART OF ITS COUNTRY - Google Patents
CARRIAGE TRANSPORTERS WITH A GUM, WHICH HAS A DEPARTURE, AND ABOUT CERTAIN BUNDS THERE MAY BE A NUMBER OF CARRIERS WHICH HAVE BEEN TAKEN TO A TRAGED AND SERVED TO PROTECT THE MATERIAL THROUGH THE RANGE AND WHEN IT WILL BE AVAILABLE OVER PART OF ITS COUNTRY Download PDFInfo
- Publication number
- DK147846B DK147846B DK18880A DK18880A DK147846B DK 147846 B DK147846 B DK 147846B DK 18880 A DK18880 A DK 18880A DK 18880 A DK18880 A DK 18880A DK 147846 B DK147846 B DK 147846B
- Authority
- DK
- Denmark
- Prior art keywords
- chain
- carriers
- plates
- departure
- carrier
- 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
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/28—Troughs, channels, or conduits
-
- 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
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/78—Troughs having discharge openings and closures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chain Conveyers (AREA)
- Pusher Or Impeller Conveyors (AREA)
- Discharge Of Articles From Conveyors (AREA)
Description
U7846U7846
Opfindelsen angår en medbringertransportør med en rende, der har en afgangsportmed en afgangsåbning,og hen over hvis bundplade der kan føres et antal medbringere, son er fastgjort til en trø&kæde, og hvor der nær ved afgangsportal findes organer 5 til løftning af kæden over en del af dens bane.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a carrier conveyor having a gutter having a discharge port having a discharge opening and over whose bottom plate a plurality of carriers may be affixed to a shirt chain, and where near the departure portal there are means 5 for lifting the chain over a portion. of its orbit.
Fra beskrivelsen til DE-patent nr. 569.477 kendes der en medbringertransportør af forannævnte art. Ved denne transportør, der er bestemt til transport af materialer bestående af kul, udgøres løfteorganerne af en sty-10 redel, som er anbragt nedstrøms for afgangsporten, og som tjener til at styre materialet i en retning på tværs af transportørens forskydningsbevægelse i retning mod afgangsporten.From the specification of DE Patent No. 569,477, a carrier conveyor of the aforementioned kind is known. In this conveyor, which is intended for the transport of materials consisting of coal, the lifting means are constituted by a control member located downstream of the outlet port and which serves to steer the material in a direction transverse to the discharge port of the conveyor towards the outlet port. .
Ved den kendte transportør opstår der ingen proble-15 mer i forbindelse med forskydningen af nævnte materiale, som består af kul. Når der skal forskydes visse materialer, der har klæbende egenskaber, opstår der imidlertid ofte det problem, at der i området af afgangsporten ikke sker en tilstrækkelig løsning af materialet fra kæden og 20 medbringerne.In the known conveyor, no problems arise with the displacement of said material, which consists of coal. However, when certain materials having adhesive properties have to be displaced, the problem often arises that in the area of the exit port there is not a sufficient solution of the material from the chain and the carriers.
Med udgangspunkt i den indledningsvis omhandlede konstruktion har opfindelsen til formål at skabe en medbringertransportør af ukompliceret og driftssikker opbygning, som muliggør en god udtømning af materialet.The object of the invention is to create a carrier conveyor of uncomplicated and reliable structure, which enables a good discharge of the material.
25 Til opnåelse heraf er transportøren ifølge opfin delsen ejendommelig ved, at afgangsporten er anbragt nedstrøms for løfteorganerne, og at disse løfteorganer danner en opadskrånende styreflade, der ender i en kant, som strækker sig på tværs af kædens bevægelsesretning, 30 og som er anbragt i afstand over afgangsportens niveau.In order to achieve this, the conveyor according to the invention is characterized in that the outlet port is arranged downstream of the lifting means and that these lifting means form an upwardly sloping guide surface which ends at an edge extending transverse to the direction of movement of the chain 30 and arranged in distance above the exit gate level.
Med denne udformning opnår man med enkle midler en medbringertransportør, som arbejder på en sådan måde, at kæden falder ned efter at have passeret løfteorganerne.With this design, with a simple means, a carrier conveyor is obtained which works in such a way that the chain falls down after passing the lifting means.
Det har vist sig i praksis, at på denne måde vil ethvert 35 materiale, der klæber til kæden, rystes effektivt løst, så det vil føres bort gennem afgangsporten.In practice, it has been found that in this way, any material adhering to the chain will be effectively shaken loosely so that it will be carried through the exit port.
En fordelagtig udførelsesform for transportøren i- 2 1A78A6 følge opfindelsen er ejendommelig ved, at der findes en drejeaksel, som i forhold til kædens forskydnings-retning er anbragt nær ved en opstrøms-grænsekant af afgangsporten i renden, og omkring hvilken løfteorganerne 5 er drejelige mellem en første stilling, hvor de befinder sig under afgangsportens niveau, og en anden stilling, hvor de befinder sig over afgangsportens niveau. Med denne enkle udformning opnår man fordelen ved let at kunne foretage indstilling af løfteorganerne i højderet-10 ning, hvorved man får mulighed for at kunne regulere kædebevægelsen på en nem måde.An advantageous embodiment of the conveyor according to the invention is characterized in that a pivot shaft is provided which, relative to the shear direction of the chain, is located near an upstream boundary edge of the outlet port in the gutter and around which the lifting means 5 are pivotable. a first position where they are below the level of the departure gate, and a second position where they are above the level of the departure gate. With this simple design, you get the advantage of being able to easily adjust the lifting means in height direction, thereby allowing the chain movement to be easily controlled.
Det er undertiden ønskeligt, at der ikke udtømmes materiale gennem afgangsåbningen. Denne må i så fald kunne lukkes, og der er følgelig ikke behov for, at der be-15 virkes løftning af kæden.It is sometimes desirable that no material be discharged through the outlet opening. In this case, it must be possible to close it, and consequently there is no need for lifting of the chain.
Til opnåelse heraf er en anden fordelagtig udførelsesform for transportøren ifølge opfindelsen ejendommelig ved, at renden har en skydeplade, der tjener til lukning af afgangsporten, og at løfteorganerne kan for-20 skydes fra deres arbejdsstilling til en stilling, hvor de er anbragt under skydepladen, ved hjælp af hvilken afgangsporten kan lukkes.In order to achieve this, another advantageous embodiment of the conveyor according to the invention is characterized in that the gutter has a sliding plate which serves to close the departure port and that the lifting means can be moved from their working position to a position where they are placed below the sliding plate. by means of which the exit gate can be closed.
En yderligere fordelagtig udførelsesform for transportøren ifølge opfindelsen, som medvirker til at 25 sikre en upåklagelig drift med en glat bevægelse af kæden, er ejendommelig ved, at løfteorganerne, der tjener til løftning af kæden, udgøres af to ud for hinanden, i transportørens tværretning placerede, svingbare plader, som er anbragt i en sådan afstand fra hinanden, at kæ-30 dens medbringere kan glide mod oversiderne af pladerne, når disse befinder sig i deres skråt opadrettede stilling, medens leddene passerer mellem pladerne. Med denne enkle udformning opnår man fordelen ved, at i det mindste en del af det til forskydning bestemte materiale kan 35 passere mellem nævnte plader, hvilket bidrager til at sikre en effektiv udtømning af materialet.A further advantageous embodiment of the conveyor according to the invention, which assists in ensuring an impeccable operation with a smooth movement of the chain, is characterized in that the lifting means which serve to lift the chain are composed of two adjacent one another in the transverse direction of the conveyor. pivotable plates which are spaced apart so that the chain carriers can slide toward the upper sides of the plates as they are in their inclined upward position while the joints pass between the plates. With this simple design, one obtains the advantage that at least a portion of the material intended for shear can pass between said plates, which helps to ensure an efficient discharge of the material.
En sidste fordelagtig udførelsesform for transpor- 147846 3 tøren ifølge opfindelsen, som ligeledes medvirker til at sikre en upåklagelig drift med en glat kædebevægelse, er ejendommelig ved, at længden af kædeleddene er valgt således i forhold til længden af afgangsåbningen, at led-5 dene, når de har passeret den yderste kant af pladerne, ikke kan komme i kontakt med bundpladen, før de har passeret forbi den modsatte kant af afgangsåbningen. Med denne enkle udformning opnår man fordelen ved, at man undgår beskadigelse af åbningens kant og yderligere 10 slid på kædeleddene.A last advantageous embodiment of the conveyor according to the invention, which also contributes to ensuring an impeccable operation with a smooth chain movement, is characterized in that the length of the chain links is chosen so as to the length of the outlet opening, that the joints when they have passed the outer edge of the plates, can not come into contact with the base plate until they have passed the opposite edge of the outlet opening. With this simple design, you get the advantage of avoiding damage to the opening edge and 10 more wear on the chain links.
Opfindelsen forklares nærmere i det følgende under henvisning til tegningen, hvor fig. 1 viser skematisk en udførelsesform for med-bringertransportøren ifølge opfindelsen, 15 fig. 2 skematisk et planbillede af led og medbrin- gere hørende til transportørens kæde, fig. 3 et vertikalbillede set i retning af en pil III i fig. 2, fig. 4 skematisk og i større skala en del af med-20 bringertransportøren i området af en afgangsport, set fra oven, fig. 5 i større skala et sidebillede set i retning af en pil V i fig. 4, og fig. 6 et sidebillede set i retning af en pil VI i 25 fig. 5.The invention will be explained in more detail below with reference to the drawing, in which fig. 1 shows schematically an embodiment of the carrier conveyor according to the invention; FIG. 2 schematically shows a plan view of joints and members of the conveyor chain; FIG. 3 is a vertical view of an arrow III in FIG. 2, FIG. Figure 4 is a schematic, and larger scale view of a portion of the carrier conveyor in the region of a discharge port, seen from above; 5 shows, on a larger scale, a side view in the direction of an arrow V in FIG. 4, and FIG. 6 is a side view of an arrow VI in FIG. 5th
Den i fig. 1 viste medbringertransportør har en rende 1, nær ved enderne af hvilken der er anbragt styrehjul eller tromler 2 og 3 indrettet til at rotere om horisontale drejeaksler. Omkring disse styrehjul 30 eller tromler 2 og 3 er der ført en endeløs kæde 4.The FIG. 1, the conveyor conveyor 1 has a channel 1, near the ends of which are guided wheels or drums 2 and 3 arranged to rotate about horizontal pivot shafts. Around these guide wheels 30 or drums 2 and 3, an endless chain 4 is provided.
Kæden 4 kan være sammensat af indbyrdes drejelige led 5, fig. 2, på hver side af hvilke der er fastgjort mere eller mindre L-formede medbringere 6. Disse med-bringere er fortrinsvis udført af en passende syntetisk 35 harpiks, og højden af medbringerne er fortrinsvis større end højden af leddene 5, fig. 3, hvilket bevirker, at de indbyrdes parallelle kædegrene - der f.eks. er båret af plader 7 og 8 anbragt i renden 1 under 147846 4 kædegrenene - under driften kun vil glide langs nævnte plader med de dele, som består af syntetisk harpiks. Det har vist sig, at støjniveauet bliver betydeligt lavere end støjniveauet ved de konventionelle kæder og med-5 bringerorganer, der er udført helt af metal, hvortil kommer, at kædens drivarrangement kræver mindre kraft.The chain 4 may be composed of mutually rotatable joints 5; 2, on each side of which are attached more or less L-shaped carriers 6. These carriers are preferably made of a suitable synthetic resin, and the height of the carriers is preferably greater than the height of the joints 5; 3, which causes the mutually parallel chain branches - e.g. is carried by plates 7 and 8 placed in the gutter 1 below the 4 chain branches - during operation only will slide along said plates with the parts consisting of synthetic resin. It has been found that the noise level becomes considerably lower than the noise level of the conventional chains and carrier elements, which are made entirely of metal, in addition to which the chain drive arrangement requires less force.
I modsætning til, hvad der gør sig gældende ved med-bringere af metal, opnår man også den yderligere fordel, at hvis der sker brud på medbringerne, vil brudstykker-10 ne, der tages med af materialet under transporten, så at sige ikke forårsage beskadigelser på det maskineri, som anvendes til den efterfølgende behandling af materi alet.Contrary to what is the case with metal carriers, the additional benefit is obtained that, if the carriers are broken, the fragments taken by the material during transport will not cause damage to the machinery used for the subsequent processing of the material.
Renden 1 kan have en eller flere fødeporte 9, 15 fig. 1, for tilførsel af materialet til transportøren, og en eller flere afgangsporte 10 til bortledning af det transporterede materiale.The gutter 1 may have one or more feed ports 9, 15 fig. 1, for supplying the material to the conveyor, and one or more outlet ports 10 for discharging the conveyed material.
Fig. 4-6 viser, at pladen 8 i området af en afgangsport 10 har en afgangsåbning 11, hen over hvil-20 ken kæden kan forskydes til forflytning af materialet.FIG. 4-6 show that the plate 8 in the region of a discharge port 10 has a discharge opening 11 over which the chain can be displaced to move the material.
Denne afgangsåbning 11 kan lukkes af en skydeplade 12, der kan bevæges på tværs af renden 1's længderetning.This outlet opening 11 can be closed by a sliding plate 12 which can be moved across the longitudinal direction of the gutter 1.
Til forskydning af pladen 12 er der under denne anbragt en hydraulisk donkraft 13, der ved sin ene ende 25 er forbundet med en bærekonstruktion 14 fastgjort til renden 1. Donkraften 13's stempelstang 15 er forbundet drejeligt med ører 16 fastgjort til skydepladen 12's underside. Der findes skinner 17, der er fastgjort vinkelret til pladen 12 på undersiden, og knas-30 ter 18, der er fastgjort til bærekonstruktionen 14, og som i samvirkning med skinnerne 17 tjener til styring af skydepladen 12.For displacing the plate 12, a hydraulic jack 13 is provided below which is connected at one end 25 to a support structure 14 attached to the gutter 1. The plunger rod 15 of the jack 13 is pivotally connected to the ears 16 attached to the underside of the slide plate 12. There are rails 17 attached perpendicular to the plate 12 on the underside and cracks 18 attached to the support structure 14 which, in cooperation with the rails 17, serve to guide the firing plate 12.
Bevægelsesretningen for transportkædens løb hen over bundpladen 8 er angivet med en pil A. Set i 35 denne bevægelsesretning hører der til afgangsåbningen 11's opstrømsgrænsekant en horisontal drejeaksel 19, der befinder sig i et niveau under pladen 8, og til hvis ender der er fastgjort to indbyrdes adskilte plader 5 147846 20, fig. 5. Nær ved deres ende, der befinder sig længst fra drejeakselen 19, har hver af pladerne 20 to ører 22, hvori der er lejret en aksel 23, som strækker sig parallelt med drejeakselen 19. Akselen 23 er 5 endvidere ført gennem huller i enderne af arme 24, hvis ender længst fra akselen 23 er fastgjort til en stang 25, som strækker sig parallelt med drejeakselen 19.The direction of movement of the conveyor chain across the base plate 8 is indicated by an arrow A. Seen in this direction of movement, the upstream boundary edge of the outlet opening 11 includes a horizontal pivot shaft 19 located at a level below the plate 8 and at whose ends two mutually fixed separate plates 5, FIG. 5. Near their end which is furthest from the pivot shaft 19, each of the plates 20 has two ears 22 in which is mounted a shaft 23 extending parallel to the pivot shaft 19. The shaft 23 is further passed through holes at the ends. of arms 24, the ends of which are furthest from shaft 23 are attached to a bar 25 extending parallel to the pivot shaft 19.
Enderne af stangen 25 er anbragt forskydeligt i U-profiler 26 fastgjort til renden 1, så stangen kan 10 forskydes parallelt med sig selv i U-profilerne.The ends of the bar 25 are slidably arranged in U-profiles 26 attached to the gutter 1, so that the rod 10 can be displaced parallel to itself in the U-profiles.
Set i plan er stangen 25 - midtvejs mellem de to plader 20 - forbundet drejeligt med enden af en stempelstang 27, som hører til en hydraulisk donkraft 28 fastgjort til renden 1.In plan, the bar 25 - midway between the two plates 20 - is pivotally connected to the end of a piston rod 27, which belongs to a hydraulic jack 28 attached to the gutter 1.
15 Ved frem- og tilbagebevægelse af stempelstangen 27 kan pladerne 20 bevæges fra den fuldt optrukne stilling i fig. 5, hvor de strækker sig skråt og delvis op over pladen 8, til en stilling, hvor de er anbragt under pladen 8. I sidstnævnte stilling af pladerne 20 20 kan skydepladen 12 ved hjælp af donkraften 13 forskydes fra den i fig. 4 viste stilling mod højre for lukning af afgangsåbningen 11, så også pladerne 20 dækkes af skydepladen 12.15 By reciprocating the piston rod 27, the plates 20 can be moved from the fully drawn position of FIG. 5, where they extend obliquely and partially over the plate 8, to a position where they are placed below the plate 8. In the latter position of the plates 20 20, the sliding plate 12 can be displaced by means of the jack 13 from the one shown in FIG. 4 to the right for closing the outlet opening 11 so that the plates 20 are also covered by the shooting plate 12.
Hvis der skal leveres materiale gennem afgangsåb-25 ningen 11, bevæges skydepladen 12 ved hjælp af donkraften 13 til stillingen i fig. 4, hvorefter pladerne 20 ved hjælp af donkraften 28 kan drejes opad til den fuldt optrukne stilling i fig. 5 og 6.If material is to be delivered through the outlet opening 11, the firing plate 12 is moved by the jack 13 to the position of FIG. 4, after which the plates 20 can be turned upwards by the jack 28 to the fully drawn position in fig. 5 and 6.
Det vil ses, at medbringerne 6 under driften vil 30 løftes ved hjælp af pladerne 20, medens leddene 5 set i plan - vil passere mellem de to adskilte plader 20. Efter at have forladt pladerne 20 vil medbringerne og de dermed forbundne led falde ned, så der i området af afgangsåbningen 11 frembringes en stødvis 35 opad- og nedadbevægelse af transportkæden. Det har vist sig i praksis, at materiale, der har tendens til at klæbe til transportkæden, vil løsnes effektivt fra kæden,It will be seen that during operation, the carriers 6 will be lifted by the plates 20, while the joints 5 seen in plan - will pass between the two separate plates 20. After leaving the plates 20, the carriers and the associated joints will fall down. so that an upward and downward movement of the transport chain is produced in the region of the outlet opening 11. In practice, it has been found that material that tends to adhere to the transport chain will be effectively detached from the chain,
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK349282A DK155994C (en) | 1979-01-18 | 1982-08-04 | TRANSPORT CHAIN FOR SCRAP TRANSPORTERS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7900392 | 1979-01-18 | ||
| NL7900392A NL185008C (en) | 1979-01-18 | 1979-01-18 | TRAFFIC CHAIN WITH BRACKETS FOR A CHAIN TRANSPORTER. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK18880A DK18880A (en) | 1980-07-19 |
| DK147846B true DK147846B (en) | 1984-12-24 |
| DK147846C DK147846C (en) | 1985-06-03 |
Family
ID=19832480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK18880A DK147846C (en) | 1979-01-18 | 1980-01-16 | CARRIAGE TRANSPORTERS WITH A GUM, WHICH HAS A DEPARTURE, AND ABOUT CERTAIN BUNDS THERE MAY BE A NUMBER OF CARRIERS WHICH HAVE BEEN TAKEN TO A TRAGED AND SERVED TO PROTECT THE MATERIAL THROUGH THE RANGE AND WHEN IT WILL BE AVAILABLE OVER PART OF ITS COUNTRY |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE881103A (en) |
| CH (2) | CH644564A5 (en) |
| DE (1) | DE3001228A1 (en) |
| DK (1) | DK147846C (en) |
| FR (1) | FR2446782B1 (en) |
| GB (2) | GB2064461B (en) |
| NL (1) | NL185008C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI832255L (en) * | 1982-07-22 | 1983-12-23 | Buehler Ag Geb | TRAOGTRANSPORTKED |
| SE436122B (en) * | 1983-12-21 | 1984-11-12 | Sixten Gjervaldseter | DEVICE FOR ATTACHING CARRIERS TO A TRANSPORT BELT |
| GB8805121D0 (en) * | 1988-03-03 | 1988-03-30 | Harrison M J | Drag chain for feeding particulate materials along trough |
| US7080728B2 (en) * | 2004-09-11 | 2006-07-25 | 4B Elevator Components, Ltd. | Forged chain and flight assembly and method of making same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE640365C (en) * | 1936-12-31 | Mitteldeutsche Stahlwerke Akt | Connection for carrier conveyor chain links bent at right angles from band iron | |
| DE594190C (en) * | 1932-02-26 | 1934-03-13 | Albert Ilberg | Scraper conveyor |
| DE833923C (en) * | 1949-09-16 | 1952-03-13 | Eickhoff Geb | Chain conveyor |
| CH434107A (en) * | 1965-04-02 | 1967-04-15 | Buehler Ag Geb | Conveyor link chain |
| CH587169A5 (en) * | 1975-06-13 | 1977-04-29 | Alusuisse | |
| DE2716094A1 (en) * | 1977-04-12 | 1978-10-19 | Besta Maschf | Scraper conveyor with chains sliding in troughs - has lower bar edges clear of trough bottom to reduce noise generation |
-
1979
- 1979-01-18 NL NL7900392A patent/NL185008C/en not_active IP Right Cessation
-
1980
- 1980-01-11 BE BE1/9679A patent/BE881103A/en not_active IP Right Cessation
- 1980-01-15 GB GB8103314A patent/GB2064461B/en not_active Expired
- 1980-01-15 DE DE19803001228 patent/DE3001228A1/en not_active Ceased
- 1980-01-15 GB GB8001370A patent/GB2040251B/en not_active Expired
- 1980-01-16 DK DK18880A patent/DK147846C/en not_active IP Right Cessation
- 1980-01-17 CH CH37280A patent/CH644564A5/en not_active IP Right Cessation
- 1980-01-17 FR FR8001021A patent/FR2446782B1/en not_active Expired
- 1980-01-17 CH CH39684A patent/CH650472A5/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CH650472A5 (en) | 1985-07-31 |
| DK18880A (en) | 1980-07-19 |
| FR2446782B1 (en) | 1989-07-21 |
| GB2064461B (en) | 1983-03-09 |
| NL185008B (en) | 1989-08-01 |
| BE881103A (en) | 1980-07-11 |
| DE3001228A1 (en) | 1980-07-31 |
| GB2064461A (en) | 1981-06-17 |
| DK147846C (en) | 1985-06-03 |
| NL185008C (en) | 1990-01-02 |
| CH644564A5 (en) | 1984-08-15 |
| GB2040251A (en) | 1980-08-28 |
| NL7900392A (en) | 1980-07-22 |
| FR2446782A1 (en) | 1980-08-14 |
| GB2040251B (en) | 1983-03-02 |
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