EP0179842B2 - Appareil de transport - Google Patents

Appareil de transport Download PDF

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Publication number
EP0179842B2
EP0179842B2 EP85902197A EP85902197A EP0179842B2 EP 0179842 B2 EP0179842 B2 EP 0179842B2 EP 85902197 A EP85902197 A EP 85902197A EP 85902197 A EP85902197 A EP 85902197A EP 0179842 B2 EP0179842 B2 EP 0179842B2
Authority
EP
European Patent Office
Prior art keywords
casing
spiral
zone
discharge opening
hose
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP85902197A
Other languages
German (de)
English (en)
Other versions
EP0179842A1 (fr
EP0179842B1 (fr
Inventor
Richard Bruke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spirac Engineering AB
Original Assignee
Spirac Engineering AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Spirac Engineering AB filed Critical Spirac Engineering AB
Priority to AT85902197T priority Critical patent/ATE40075T1/de
Publication of EP0179842A1 publication Critical patent/EP0179842A1/fr
Application granted granted Critical
Publication of EP0179842B1 publication Critical patent/EP0179842B1/fr
Publication of EP0179842B2 publication Critical patent/EP0179842B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/24—Extrusion presses; Dies therefor using screws or worms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/18—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing with means for adjusting the outlet for the solid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/30—Presses specially adapted for particular purposes for baling; Compression boxes therefor
    • B30B9/3082—Presses specially adapted for particular purposes for baling; Compression boxes therefor with compression means other than rams performing a rectilinear movement

Definitions

  • the present invention relates to an apparatus for receiving, conveying and compacting material as stated in the preamble of Claim 1.
  • Such an apparatus is know from the prior use according to the Renspress of the Maskinleveranser AB, Box 36, S-57076, Ruda (SE).
  • a conveyor comprising a casing and a shaftless spiral disposed in the casing.
  • Either the inlet end or the outlet end of the casing could be provided with a drive means to rotate the spiral to convey material towards the discharge opening of the conveyor.
  • the casing and the spiral consist of flexible or elastic material with the exception of the portion in proximity to the drive means where the casing consists of rigid material and the spiral surrounds a drive shaft.
  • the aim of the conveyor is to adapt the outlet level to the level of a receiving equipment.
  • the shown combination is however not suited to compact material depending on the flexible or elastic properties of the casing and the spiral.
  • the publication does not indicate any measures to compact the material while being conveyed.
  • the present invention constitutes a conveyor apparatus in which is included means for compaction of the material being conveyed and in which the above-indicated disadvantages are obviated to a remarkable extent.
  • the invention relates to a combination of a shaftless spiral and a casing as disclosed in the characterising part of the independent Claim 1.
  • the combination of spiral and casing creates a compact unit of equipment which makes for reliable conveyance of the material and is used, according to the invention, to realise a compaction of the material at same time as the material is enclosed, which entails that the surrounding environment is not affected.
  • the employment of compaction reduces the moisture-content in the material, while in other applications, the compaction of the material constitutes the basis of a batchwise discharging of the material from the apparatus.
  • the compaction is further amplified in that the spiral is provided with progressively diminishing pitch.
  • the spiral is completely free, i.e. is not journalled in that end which is directed towards the discharge section of the casing.
  • the counter-pressure member consists of a spring-loaded counterpressure plate which is movably journalled in the upper defining surface of the casing and/or in conjunction with the discharge opening of the casing.
  • the counterpressure plate is disposed in a receptacle chamber.
  • the braking effect of the casing on the material is amplified in that the casing, most proximal the discharge opening, is provided with reduced inner cross-section.
  • the counterpressure member consists of a receptacle device, for example a container, a hose etc., the member being shiftable in the axial direction of the casing.
  • the material is conveyed into the receptacle device, the material moving the receptacle device in the axial direction of the spiral.
  • the counterpressure member consists of a shaftless spiral disposed in a casing, this casing having an infeed opening connected to the discharge opening of the delivering casing. That casing which discharges the material is, in this instance, of an orientation which entails that its axis is directed towards the centre axis of the spiral and the receiving combination of casing and spiral.
  • the pitch, speed and/or radial extent of the spiral blades are, in the receiving combination, adapted so as to occasion a braking of the material movement before the material reaches the discharge opening of the disclosed casing.
  • the substantially complete filling constitutes a precondition for being able to convey the material upwardly in a more or less vertical direction.
  • the receiving combination with its axis directed, for example, horizontally, vertically, or therebetween.
  • the casing is provided with drainage openings which are located in that region of the casing where compaction of the material takes place.
  • an orientation of the casing is advantageously selected so as to entail that the discharge section of the casing is placed higher than its infeed section, whereby, on compaction, the pressed out liquid is conveyed in a direction opposite to the direction of movement of the material and is drained out from the casing through the previously-mentioned drainage openings.
  • FIG. 1 and 2 illustrate the fundamental construction and function of a screw press.
  • an apparatus 1 which includes an elongate, tube-like casing 2 in which is placed a shaftless spiral 3. At its one end, the casing is provided with an infeed opening 14 which connects to an upwardly-directed drum 16.
  • a motor 4 drives the spiral 3 by the intermediary of a gearing and journalling unit 30.
  • the other end of the casing constitutes the discharge portion 18 of the apparatus, which is provided with a discharge opening 24.
  • the spiral is solely journalled in connection with the gearing and journalling unit, while that end of the spiral which is directed towards the discharge portion is fully free.
  • the combination of spiral and casing is divided into an infeed zone 20, a transport zone 21, a precompaction zone 22 and a compaction zone 23.
  • the cross-sections through each respective zone in the illustrated embodiment are apparent from Figures 1a-c. It will be appreciated from these Figures that the cross-section of the casing in the precompaction zone is substantially circular and surrounds the spiral with slight play.
  • Figure 1 also shows by solid line a relatively abrupt transition between the transport zone 21 and the precompaction zone 22. However, in certain physical applications, the embodiment shown by broken lines is selected, with a relatively continuous transition between the cross-sections of the transport zone and the precompaction zone.
  • Figure 2 shows in particular how the material flow 40 encompasses a relatively small portion of the cross-section of the casing as long as the material is in the transport zone 21, and how the material, on its passage through the precompaction zone, takes up steadily increasing part of the cross-section in order, in the compaction zone proper, substantially to fill out the entire cross-section.
  • Figures 3 and 4 show how the combination of spiral and casing is provided with a counterpressure member 25, 8 for arresting or braking the movement of the material in the compaction zone 23 of the casing.
  • the counterpressure member 25 is formed in that the movement of the material is braked during movement in the longitudinal direction of the casing, because of friction against the inner surface of the casing.
  • the braking effect is amplified in that the casing is, in the region of the compaction zone 23, provided with reduced inner cross-section.
  • Figure 4a shows, first, one embodiment in which the counterpressure member consists of a counterpressure plate 8a disposed in association with the discharge opening 24 and pivotally journalled in conjunction with the upper region of the discharge opening, and movable in the direction of the double-headed arrow A; and secondly, an embodiment in which the counterpressure member consists of a counterpressure plate 8b which is pivotal and preferably return springbiased in the upper defining surface 27 of the casing 2.
  • Figure 4b shows a partial longitudinal section and Figure 4c a view taken along the line D-D in Figure 4b of one embodiment in which the counterpressure member consists of a split cone 34.
  • the cone comprises two halves 34a and 34b and is openable under the counteraction of springs 34 whose spring force is adapted to provide that counterpressure which is requisite to attain the intended compaction of the material.
  • FIG. 5 shows one embodiment in which the counterpressure plate 8a, in conjunction with the discharge opening 24, is disposed in a receptacle chamber 7.
  • the counterpressure plate is journalled in the upper defining surface of the chamber, but the journalling may, for example, correspond to that of those embodiments as shown in Figure 4.
  • Figures 6a and b show embodiments in which the casing 2, in conjunction with the precompaction zone 22 and the compaction zone 23, is provided with drainage openings 33.
  • Figures 7a and b show embodiments of the present invention in which the counterpressure member consists of a receptacle device 26, 28, shiftable in the axial direction of the casing and, in Figure 7a, comprising a container 26, while in Figure 7b, a hose 28, in this instance, the hose 28 is drawn out from a magazine 29.
  • braking means 36 are provided for restricting the withdrawal of the hose from the magazine.
  • an arrow F intimates a force which is counter-directed to the movement of the container.
  • the arrow represents a device, for example a hydraulic cylinder.
  • Figure 7a it is shown that, in certain embodiments, the hose 28 cooperates with the container 26 (broken lines) and is brought into abutment with the inner surfaces of the container according as the hose is filled with material from the casing.
  • Figures 7a and b show embodiments of the invention in which the material surrounded by the container and/or the hose is compacted.
  • Figures 8a and b show one embodiment of the invention in which the apparatus 1 includes at least one supplementary conveyor apparatus 50 comprising a casing 52 and a shaftless spiral 53 placed therein.
  • the spiral is driven by a motor 54 by the intermediary of a gearing and journalling unit 51 and its speed is, thus, for example by modification of the gear ratio, adjustable to any desired level.
  • the direction of the first spiral 3 and/or a central shaft of the discharge end 18 of the casing is towards the central axis of the spiral 53 of the conveyor apparatus.
  • the opening surface area of the discharge opening 24 of the casing 2 substantially agrees with the crosssectional area of the receiving casing 52, both of the casings being substantially sealingly interconnected.
  • the conveyor apparatus 50 is, in certain embodiments, disposed to move the material essentially horizontally, while in other embodiments, movement is effected during alteration of the level of the material.
  • the casing 52 of the conveyor apparatus 50 with the spiral placed therein has a substantially vertical direction. In this instance, the free end of the spiral is directed upwardly.
  • Figures 9a-c show embodiments of the free end 31-32 of the spiral 3.
  • the end 31 of the spiral terminates in such a manner that its blade height continuously diminishes from the inner and outwardly, i.e. the centre hole of the spiral increases progressively.
  • Figures 9b and c show embodiments in which the end 32 of the spiral is disposed for a gradual reduction of its blade height.
  • braking is effected of the movement of the material in the compaction zone 23 by friction against the inner wall of the casing in the compaction zone ( Figure 3), by the action of the counterpressure plates 8a, 8b ( Figures 4 and 5), or by a combination of friction and pressure which is obtained in that the cross-section ( Figure 3) of the casing diminishes, or alternatively in that the casing terminates in the cone 34 ( Figure 4b).
  • a reduction is effected of the liquid-content of the material, during passage through the precompaction zone 22 and the compaction zone 23.
  • the casing 2 is, in such instances, disposed such that the material is moved slightly upwardly when it passes in a direction towards the discharge opening 24.
  • drainage of the material will be facilitated, since a portion of the liquid will pass in a direction opposite to the direction of movement of the material and substantially in the centre of the shaftless spiral, before the liquid runs out through the drainage openings 33.
  • the liquid it will be possible for the liquid to reach the drainage openings of the casing in a region where the material has not yet had time to be compacted to any appreciable degree.
  • the conveyor apparatus 50 constitutes a counterpressure member in that the dimensions, pitch and speed of the spiral 53 have been selected such that the material is braked in its movement on passage out from the discharge opening 24 of the casing 2. There will hereby be obtained the desired compaction of the material when this is located in the casing 52 of the receiving combination, and thereby requisite filling of the casing of the receiving combination.
  • counterpressure members are, in certain embodiments, combined so that, for example, there will be included in one and the same apparatus, a counterpressure plate 8a, b, and a terminating conical portion of the casing; a counterpressure plate 8a, b, and a shiftable receptacle member 26, 28; a cone 34 and the receiving casing 52 with spiral 53; and so on.
  • a braking of the material takes place in the precompaction zone to such a great extent that at least that section of the casing located most proximal the compaction zone will be as good as completely filled with material.
  • the thus compacted material is thereafter caused to leave casing through its discharge opening 24 in batches whose size is determined by the rotation of the spiral (the angular alteration which the spiral undergoes), in conjunction with each discharge occasion.
  • the present invention offers a simple and reliable technique for the batchwise discharge, with a relatively degree of accuracy, of material from an apparatus according to the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screw Conveyors (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Transmission Devices (AREA)
  • Braking Arrangements (AREA)
  • Refuse Collection And Transfer (AREA)

Abstract

Appareil (1) de transport et de compactage de matériau, où le matériau comporte des fractions de différentes tailles, densités, élasticités, teneurs en humidité, etc.. L'appareil comporte au moins une spirale sans axe (3), chaque spirale étant disposée dans un boîtier de préférence fermé (2) par exemple en forme de U et/ou de section transversale circulaire. Un mécanisme d'entraînement (4) est prévu pour la rotation de la spirale et placé conjointement avec la partie de boîtier où le matériau est introduit dans le boîtier. A l'extrémité opposée du boîtier, c'est-à-dire à l'extrémité placée à proximité de la section de décharge (18) du boîtier, le boîtier entoure la spirale avec un faible jeu et comporte en outre, dans une extension de la spirale, une région terminale (23) dans laquelle la spirale n'est pas entourée du boîtier. En règle générale, des éléments de contre pression sont prévus pour freiner le mouvement du matériau. Dans certains modes de réalisation, l'effet de freinage considéré est réalisé par le fait que la région terminale (23) offre une friction suffisante par rapport au matériau.

Claims (9)

  1. Appareil (1) pour le transport et le compactage de matière compactable dans lequel l'appareil comporte une partie d'admission (29) et une partie de sortie (18) présentant une ouverture de sortie (24), dans lequel une hélice sans arbre rotative (3) est disposée dans une enveloppe (2) qui enferme l'hélice sur une partie au moins de sa longueur, dans lequel l'hélice présente une extrémité libre terminale (31, 32) et un passage central libre s'étendant suivant la longueur de l'hélice, dans lequel un moyen d'entraînement (4) pour l'entraînement en rotation de l'hélice est prévu conjointement avec ladite partie d'admission pour amener l'hélice à faire avancer la matière vers l'ouverture de sortie, dans lequel une ou plusieurs ouvertures (14) d'admission de la matière sont disposées dans ladite partie d'admission et dans lequel une partie d'extrémité (22, 23) de l'enveloppe (2) conjointement avec la partie de sortie (18) présente une section sensiblement circulaire pour entourer l'hélice avec un léger jeu, dans lequel la partie d'extrémité (22, 23) comprend une zone de compactage (23) où l'enveloppe (2) s'étend à partir et au-delà de ladite extrémité libre de sorte que la matière amenée à l'intérieur de la zone de compactage subit une résistance à l'avancement, s'accumule et se trouve par là tassée, que la partie d'extrémité comprend aussi une zone de précompactage (22) interagissant avec la zone de compactage, ladite zone de précompactage étant placée dans la région de la partie d'extrémité qui précède la zone de compactage et où l'enveloppe entoure l'hélice avec un léger jeu, de sorte que via le passage central libre de l'hélice la matière compactée interagit avec la matière présente dans la zone de précompactage (22) afin de retarder progressivement l'avancement de la matière et de la compresser, caractérisé en ce qu'un organe de contre-pression (8, 25, 26, 28, 35, 50) interagissant avec le tube souple (2) et déplaçable par rapport à ce dernier est prévu conjointement avec la zone de compactage (23), et en ce que le tube souple est pourvu d'une pluralité d'ouvertures de drainage traversant le mur du tube souple dans la région où a lieu le compactage de la matière.
  2. Appareil selon la revendication 1, caractérisé en ce que l'hélice présente, dans la zone de précompactage (22), un pas qui diminue vers l'ouverture de sortie (24) de l'enveloppe.
  3. Appareil selon la revendication 1 ou 2, caractérisé en ce que l'extrémité libre (31, 32) de l'hélice a une hauteur de pale dont l'étendue radiale diminue vers l'extrémité de l'hélice, l'étendue radiale de l'extrémité (31) diminuant continuellement, ou l'étendue radiale de l'extrémité (32) diminuant par paliers.
  4. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que l'organe de contre-pression est constitué par une plaque de contre-pression (8a, 8b) de préférence chargée par ressort, qui tourillonne avec possibilité de déplacement dans la surface de délimitation supérieure (27) de l'enveloppe et/ou dans l'ouverture de sortie (24) de l'enveloppe, et/ou est constituée par un étranglement doté d'élasticité positive (34), par exemple cône (34) ouvrant à l'encontre d'un ressort.
  5. Appareil selon la revendication 4, caractérisé en ce que la plaque de contre-pression (8a) ou le cône (34) est disposé dans une chambre-réceptacle (7).
  6. Appareil selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'enveloppe (2) présente dans la zone de compactage (23) une section qui, dans toutes les parties de la zone, est sensiblement uniforme ou diminue en direction de l'ouverture de sortie (24) de l'enveloppe.
  7. Appareil selon l'une quelconque des revendications 1 à 4 ou 8, caractérisé en ce que l'organe de contre-pression est constitué par un récipient (26) déplaçable suivant l'axe de l'enveloppe, par un tube souple amovible (28) entourant l'enveloppe, ou par le tube souple (28) monté mobile dans le récipient (26), le récipient, le tube souple ou la combinaison de tube souple et de récipient recevant la matière déchargée par l'ouverture de sortie (24) de l'enveloppe, la matière déplaçant le récipient, le tube souple ou la combinaison de tube souple et de récipient suivant l'axe de l'enveloppe.
  8. Appareil selon l'une quelconque des revendications 1 ou 6, caractérisé en ce que l'organe de contre-pression est constitué par un dispositif (50) où est incluse une hélice sans arbre (53) disposée dans une enveloppe (52), l'ouverture de sortie (24) étant reliée de manière sensiblement hermétique à l'ouverture d'admission du dispositif (50) et présentant une superficie d'ouverture qui correspond sensiblement à l'aire de section de l'enveloppe (52) du dispositif (50).
  9. Appareil selon la revendication 8, caractérisé en ce que le pas, la vitesse et/ou l'étendue radiale des pales d'hélice de l'hélice (53) disposée dans l'enveloppe réceptrice (52) sont adaptés de façon à assurer un freinage du déplacement de la matière dans la section d'extrémité (23) de l'enveloppe (2) et/ou dans la zone (23).
EP85902197A 1984-04-19 1985-04-16 Appareil de transport Expired - Lifetime EP0179842B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85902197T ATE40075T1 (de) 1984-04-19 1985-04-16 Foerdervorrichtung.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE8402202A SE446956B (sv) 1984-04-19 1984-04-19 Anordning for forflyttning av material medelst minst en axellos spiral
SE8402202 1984-04-19
PCT/SE1985/000174 WO1985004837A1 (fr) 1984-04-19 1985-04-16 Appareil de transport

Publications (3)

Publication Number Publication Date
EP0179842A1 EP0179842A1 (fr) 1986-05-07
EP0179842B1 EP0179842B1 (fr) 1989-01-18
EP0179842B2 true EP0179842B2 (fr) 1996-08-07

Family

ID=20355636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85902197A Expired - Lifetime EP0179842B2 (fr) 1984-04-19 1985-04-16 Appareil de transport

Country Status (5)

Country Link
EP (1) EP0179842B2 (fr)
DE (3) DE8590093U1 (fr)
GB (1) GB2169217B (fr)
SE (1) SE446956B (fr)
WO (1) WO1985004837A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5012731A (en) * 1985-06-26 1991-05-07 Yves Maisonneuve Device for pressing heterogeneous mixtures with regulated pressing force for separating liquid and solid fractions thereof, in particular fruit juices
SE450104B (sv) * 1985-10-18 1987-06-09 Spirac Engineering Ab Anordning for komprimering av material och reduktion av dess vetskeinnehall
SE460399B (sv) * 1988-02-29 1989-10-09 Spirac Engineering Ab Saett och anordning foer rening av ett vaetskefloede medelst ett silgaller med rengoeringsanordning
US4915308A (en) * 1989-05-01 1990-04-10 Larry Koenig Barrel injector screw
FR2658751B1 (fr) * 1990-02-23 1992-08-07 Inst Francais Du Petrole Dispositif de pre-traitement de dechets plastiques avant recyclage.
SE9103451L (sv) * 1991-11-19 1993-05-20 Spirac Engineering Ab Last- och komprimeringsanordning
US5421251A (en) * 1991-11-19 1995-06-06 Spirac Engineering Ab Apparatus for compacting material
DE4232684A1 (de) * 1992-09-29 1994-03-31 Siemens Ag Verfahren zum Transport und Transportvorrichtung
DE4420976C2 (de) * 1994-06-16 1997-02-06 Voith Sulzer Stoffaufbereitung Verfahren und Vorrichtung zum kontrollierten Transport von eingedicktem Faserstoff aus einem unter Überdruck stehenden Raum
SE9700815L (sv) * 1997-03-06 1998-09-07 Spirac Engineering Ab Pressanordning
EP1025984A1 (fr) * 1999-02-01 2000-08-09 Bormet Maschinenbau GmbH Presse transporteuse
SE9902014L (sv) * 1999-05-31 2000-12-01 Spirac Engineering Ab Separeringsanordning

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1494284A (fr) * 1966-07-27 1967-09-08 So Ma Vi Dispositif de réglage pour pressoirs continus
AT295277B (de) * 1970-02-10 1971-12-27 Boehler & Co Ag Geb Schneckenpresse zur Herstellung der Ummantelungen von Schweißelektroden
GR62183B (en) * 1979-01-23 1979-03-02 Mourat Vasilios Mouratidis & C Flexible distributor without shaft
FR2522585A1 (fr) * 1982-03-02 1983-09-09 Somavi Pressoir a vis

Also Published As

Publication number Publication date
DE8590051U1 (de) 1986-04-03
EP0179842A1 (fr) 1986-05-07
DE3567597D1 (en) 1989-02-23
GB2169217A (en) 1986-07-09
SE8402202D0 (sv) 1984-04-19
GB2169217B (en) 1988-03-02
SE8402202L (sv) 1985-10-20
DE8590093U1 (de) 1986-04-10
GB8529528D0 (en) 1986-01-08
EP0179842B1 (fr) 1989-01-18
SE446956B (sv) 1986-10-20
WO1985004837A1 (fr) 1985-11-07

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