EP0439712B1 - Châlit ou dispositif similaire de repos - Google Patents

Châlit ou dispositif similaire de repos Download PDF

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Publication number
EP0439712B1
EP0439712B1 EP90122494A EP90122494A EP0439712B1 EP 0439712 B1 EP0439712 B1 EP 0439712B1 EP 90122494 A EP90122494 A EP 90122494A EP 90122494 A EP90122494 A EP 90122494A EP 0439712 B1 EP0439712 B1 EP 0439712B1
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EP
European Patent Office
Prior art keywords
longitudinal
longitudinal members
bedstead according
chambers
hardness
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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
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EP90122494A
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German (de)
English (en)
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EP0439712A1 (fr
Inventor
Siegfried Dipl.-Ing. Heerklotz
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Individual
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Individual
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Publication of EP0439712A1 publication Critical patent/EP0439712A1/fr
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C23/00—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases
    • A47C23/06—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using wooden springs, e.g. of slat type ; Slatted bed bases
    • A47C23/062—Slat supports
    • A47C23/063—Slat supports by elastic means, e.g. coil springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C23/00—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases
    • A47C23/06—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using wooden springs, e.g. of slat type ; Slatted bed bases
    • A47C23/061—Slat structures

Definitions

  • the invention relates to a bed or the like resting device, consisting of a slatted frame with longitudinal spars lying on a base plate made of resilient material such as foam in the region of its two outer edges and crossbars supported by these, the longitudinal spars being formed over their entire length in individual zones with different spring hardnesses .
  • a bed point is known from WO 87/02559.
  • the invention has for its object to bring about the formation of different hardness zones over the length of the longitudinal spars with simple means in a manner that permits a great variety of spring hardness in the respective spar zone.
  • a chamber provided according to the invention for changing the spring hardness of the longitudinal bars can be produced in a simple manner by means of a material cutout during the shaping process of the longitudinal bars, in particular in an injection or casting mold. It goes without saying that not only one, possibly large-volume chamber, but, if desired, and depending on the spring hardness desired, several chambers of different shape and size can be formed in this way. However, it is equally possible to form the chamber or chambers of material recesses which can be punched out or cut out of the spar material on the shaped longitudinal spar.
  • the chambers are designed as empty spaces, as is provided according to one embodiment of the invention, the chambers incorporated into a predetermined longitudinal beam zone lead to a change in the spring hardness in this area in the sense of a reduction in the spring hardness, as is particularly the case for the shoulder area of the slatted frame is sought.
  • the chambers are at least partially filled by spring bodies with different spring hardness than that of the spar material.
  • spring bodies are inserted into the correspondingly provided chambers in the corresponding, opposite zones of the two longitudinal spars with a spring hardness that is lower than that of the spar material.
  • Suitable resilient spar materials are primarily suitable foams such as polyurethane foam or latex foam. Basically, there is also the possibility of replacing the hardness zone of the longitudinal spars, which contains the chambers changing the spring hardness, with a longitudinal spar section made of a material of different spring hardness than the rest of the spar material, and this section with at least one further material section of different spring hardness to form a complete longitudinal spar, e.g. by gluing or a positive connection intervention.
  • the width of the longitudinal spars can be dimensioned in accordance with the body weight of the user, for example by appropriately dimensioning the production shape for the longitudinal spars or, preferably, by cutting off correspondingly wide strips or blocks of material from a spar material supply. Since the spar material can be easily cut, the width of the longitudinal spars can be adapted very precisely to the body weight of the user.
  • the cushion cover can consist of a flat hose section closed at the end with a flat lower wall resting on the slatted frame, an upper quilt and a support mat inserted between them in the flat hose.
  • FIG. 1 shows the corner area of a bed area with a bed side wall 1 and a head wall 2 adjoining it at right angles.
  • a holding block 3 On the inside of the head wall 2, a holding block 3 is attached at a height for supporting the underside of a longitudinal spar 4 of a slatted frame designated as a whole by 5 (FIG. 2).
  • a retaining strip 6 At the same support height, a retaining strip 6 (FIG. 5) is fastened to the inside of the bed side wall 1, on which the longitudinal beam 4 is supported over its length.
  • the slatted frame 5 comprises two longitudinal beams 4 made of resilient material on its two outer edges and crossbeams 7 which are individually supported on both ends thereof and which consist of wood, while the longitudinal beams 4 consist of a suitable foam, in particular a latex foam or a polyurethane foam.
  • the longitudinal beams 4 consist of a suitable foam, in particular a latex foam or a polyurethane foam.
  • a suitable foam in particular a latex foam or a polyurethane foam.
  • further longitudinal bars can be provided in the area between the two outer longitudinal bars, on which the crossbars 7 are supported individually in a suitable manner.
  • the flat tube section 8 comprises a flat bottom wall 9 resting on the crossbars 6, an upper quilt 10 and a support mat 11 inserted between them.
  • the total thickness of the cushion cover formed by the flat tube section 8 is approximately 4 cm.
  • the quilt 10 can be a suitable fill 12, e.g. made of pure new wool or kapok.
  • the support mat 11 can be a coconut mat, a hand-garnished kapok or horsetail hair mat or a woven sheep's wool mat.
  • Each longitudinal spar 4 lies, as can also be seen from the sectional representations, namely first of FIGS. 3 to 6, on a fixed base plate 13, for example made of wood, which has the same width as the longitudinal spar 4. With this base plate 13, which does not spring itself and against which the longitudinal spar 4 is pressed resiliently in use, the longitudinal spar is supported on the block 3 and the longitudinal bar 6 as shown in FIG. 5.
  • a frame 14 which runs on the inside along the four sides of the bed and is assigned to the bed walls, is provided for supporting the longitudinal spar 4 with its base plate 13 on the underside.
  • the floor on which the slatted frame 5 can be placed directly can also serve as the base plate or plates 13.
  • At least one chamber 15 which changes the spring hardness is formed in at least one of the hardness zones, which corresponds, for example, to the shoulder region of the body of a user.
  • This zone is designated 16 in FIG. 7.
  • the head zone 17 adjoining on the right as well as the main zone 18 adjoining the shoulder zone 16 on the left are kept free from one chamber 15 or, as shown in FIG. 7, several chambers 15 and thus have the through the spar material, i.e. the foam used, specified basic spring hardness.
  • the chambers 15 in the form of material recesses or recesses in the foam material of the longitudinal spars 4 have the shape of through-openings in embodiment A according to FIG. 1, but they can also, as is provided in embodiment B according to FIG. 1, the Have the shape of blind holes.
  • the chambers 15 are incorporated into the longitudinal bars 4 in the direction of the crossbars 7, the chambers can in principle also be incorporated into the longitudinal bars 4 in the direction of the vertical extension thereof.
  • the arrangement or expansion of the chambers 15 in the spar material is in the region of the lower three quarters of the height dimension the longitudinal bars 4 limited.
  • the chambers 15 may have a circular cross-sectional shape. However, they can also have a polygonal cross-sectional shape, in particular that of a rectangle or square. It is also possible to design the cross-sectional area of the chamber or chambers 15 in such a way that it decreases towards an adjacent, different hardening zone. This is shown in embodiment B, in which a polygonal chamber 15 ', starting from a rectangular cross-sectional area, for example in the shoulder zone 16, gradually tapers towards the adjacent head zone 17 and terminates in an acute-angled triangle.
  • the cross slats 7 of the slatted frame 5 can have any suitable cross-sectional shape, e.g. the round shape according to the embodiment A or the rectangular shape according to the embodiment B, and are supported in their cross-section corresponding receiving openings 19 in the upper third of the vertical extension of the longitudinal spars 4.
  • the receiving openings 19 can be formed by through holes, as shown in FIG. 1 for embodiment A and in FIG. 3.
  • the receiving openings 19 can, however, also be formed by transverse channels incorporated in the upper side of the longitudinal spars 4, as is shown for the embodiment B in FIG. 1. These transverse channels can be continuously worked into the top of the longitudinal spars 4 or end in the manner of blind holes shortly before the outside of the respective longitudinal spar 4, as is shown for the embodiment B in FIG. 1.
  • the transverse slats 7 are preferably cut to the same cross-section at their free ends 20 of a soft material provided the felt, which prevents damage to the bed side wall 1, especially when using the bed.
  • FIG. 5 illustrates an embodiment in which the receiving openings 19 have the form of blind holes into which the crossbars 7 are inserted to the end.
  • the receiving openings 19, like the chambers 15, are formed by material cutouts produced during the shaping process of the longitudinal spars 4 or by material recesses, in particular punched out on the finished longitudinal spar 4. It is preferable, but not essential, that the chambers 15 and the receiving openings 19 are formed in the same way.
  • the receiving openings 19 can be created during the shaping process, while the chambers 15 are punched or cut from the foam material on the fully formed longitudinal bar 4 in accordance with the user-specific specifications.
  • the longitudinal bars 4 are in each case surrounded by a shell 21 of textile material enclosing their outer circumference, including or exclusively the lower base plate 13, which protects the foam material of the longitudinal bars 4, in particular in the case of light-sensitive latex foam.
  • the textile sleeves 21 are provided in alignment with the receiving openings 19 with insertion openings 22 for the crossbars 7 of the slatted frame 4.
  • the insertion openings 22 can, as shown in FIGS. 3 and 4, have an extension 23 downward beyond the crossbar receiving cross section, with which downward movements of the crossbar end can be facilitated when using the bed station.
  • the insertion opening 22, as shown at 24 in FIG. 4 can have a vertical extension extending into the lower third of the height dimension of the longitudinal bars 4 Be provided incision, which also facilitates downward spring movements of the slatted frame, without this requiring deformation of the textile cover 21.
  • a sleeve 21 made of textile material is not provided. This is particularly unnecessary if the longitudinal bars 4 are formed from robust, light-insensitive foams, such as polyurethane foams.
  • the longitudinal bars 4 are, however, enclosed by a skin which can be formed automatically by the shaping process of the longitudinal bars 4 in a casting or injection mold or, at least partially, preferably in the visible area, by a subsequent coating process which is carried out on such longitudinal bars are formed from blocks cut from a supply of material.
  • the chambers 15, 15 'in the embodiments described with reference to FIGS. 1 to 7 are all designed as empty spaces, so that they always bring about a reduction in the spring hardness in their attachment zone compared to the basic hardness or elasticity predetermined by the foam material of the longitudinal bars 4.
  • the spring bodies 25 can have a spring hardness that is greater or smaller than the spring hardness of the spar material, so as to enter a zone hardness greater or less in the longitudinal bars 4. It is it is possible, in particular, to fill the chambers 15 with blocks of material which also consist of foam and have the same shape and dimensions, as is illustrated in FIGS. 8 to 14 and in FIG. 16.
  • FIGS. 9 and 10 also show a modification of the insertion openings 22 for the crossbars 7, which in this case are formed by a slit-shaped cutout 26 made of the casing material over the length of the textile casing 21.
  • the crossbars 7 inserted into the receiving openings 19 are fixed in their position on the casing 21 by a thread 27.
  • the chamber 15, as shown in FIG. 9, is designed as a through opening and is completely filled with the material block 25.
  • the chambers 15 can be incorporated into the longitudinal spar 4 in the form of material cutouts or recesses, with a connecting web 28 between the foam 15 above and below the chambers 15 between the two chambers 15 remains. Both chambers 15 are again filled with material blocks 25 of a foam with different spring hardness than the foam of the longitudinal spar 4.
  • the chambers 15 filled with foam can furthermore have a cross-sectional taper towards an adjacent hardness zone in accordance with FIG. 6, as can be seen in FIG. 14 at 15 ′.
  • the insertion openings can each extend from a single one to the lower third of the height of the longitudinal spars 4 vertical incision 29 may be formed in the material of the sleeve 21.
  • the incisions of the respective cutting configuration 30 have a different orientation, in which case they intersect or merge into one another.
  • 15 shows, in particular in the right half, an X-shaped and an I-shaped cutting configuration 30, while the remaining cutting configurations 30 each comprise one or two vertical incisions 31 which extend into the lower third of the height dimension of the longitudinal spars 4 in this way to enable the slat movement without resistance of the sleeve 21.
  • the actual insertion opening can, as shown in the left half of FIG. 15, from a V-shaped or an X-shaped cutting configuration or, as shown at the left end of FIG. 15, from a horizontal incision in connection with the incisions 31 extending vertically downward. In the latter case, as shown in FIGS.
  • FIG. 16 shows, with the textile sheath 21 shown partially broken off, a longitudinal beam 4 with three different embodiments of a spring zone through the chambers 15, 15 'with material blocks 25 inserted into the latter compared to the base material of the longitudinal beam 4.
  • the hardness zones in the longitudinal direction of the longitudinal spar 4, which are changed in their spring hardness, are shown successively in FIG. 16, it goes without saying that this is only an example and numerous other possible combinations are possible.
  • the chamber 15 ′ is delimited on the underside of the spar 4 by the adjacent base plate 13, as can also be the case with a chamber 15 or 15 ′ designed as an empty space.
  • the spring bodies 25 can also consist of an elastomeric material such as rubber or rubber, in order to introduce the spring properties of such materials into the longitudinal spars 4 in regions to form the different hardness zones. It is thus possible to form the spring bodies 25 in each case from resilient molded parts 33 of the cross-sectional shape, which can be seen in particular in FIG. 18, in the manner of an egg timer.
  • resilient molded parts 33 of the cross-sectional shape, which can be seen in particular in FIG. 18, in the manner of an egg timer.
  • lugs or cross strips 34 pointing downward are left in the foam material of the longitudinal spar 4, which protrude into the chamber 15, which is designed as a through opening and delimited on its underside by the base plate 13, and the adjoining upper edges of the molded parts 33, their width is at most equal to the width of the chamber 15.
  • the spring body 25 is formed by a band 35 made of rubber or rubber or another elastomeric material, which consists of a flat material strip, whose width in the example shown is somewhat smaller than the width of the chamber 15, which in turn is designed as a through opening and is delimited on the underside by the base plate 13.
  • the rubber band 35 is fastened at its two ends to two supports 36, which are made of wood, for example, as shown at 37.
  • the rubber band 35 is stretched over the length of the chamber 15 against its top.
  • the two supports 36 can be supported at a suitable point in the chamber 15 and / or in the spar material in front of or behind the chamber 15 (cf. FIG. 20).
  • the elastic band 35 Due to its small material thickness, the elastic band 35 allows, in extreme cases, a very wide deflection of the longitudinal spar 4 in the area of the chamber 15 until the elastic band 35 rests on the base plate 13. Such an extensive deflection is in the configuration of the spring body 25 according to FIGS. 17 and 18 not possible, since their deflection path is limited by the fact that when the spring bodies 25 are compressed, several wall thicknesses of the molded parts 33 come into mutual contact.
  • the embodiments according to FIGS. 17 and 18 or 19 and 20 are used depending on the given conditions.
  • FIG. 21 An embodiment C is illustrated in Fig. 21, in which that hardness zone of the longitudinal bars 4, which contains the chamber or chambers 15 which changes the spring hardness, e.g. the hardness zone 16 is replaced by a longitudinal spar section 38 made of a material of different spring hardness than the other spar material.
  • This spar section 38 is combined with at least one further material section 39 of different spring hardness to form the complete longitudinal spar 4.
  • the zone-by-zone different spring hardness of the longitudinal bars 4 is thus achieved in this embodiment by the different spring properties of the longitudinal bar sections 38 and 39 used, which, however, can be modified by incorporated chambers 15.
  • the two material sections 38 and 39 are glued to one another at their adjoining, preferably identical end faces to the longitudinal beam unit 4, as is illustrated at 40 in FIG. 25.
  • the longitudinal beam sections 38, 39 with one another to form the longitudinal beam unit 4 by means of a positive connection engagement of their adjoining end regions 41, 41 '.
  • the end regions 41, 41 ' have mutually overlapping engagement parts in the direction of loading of the longitudinal spar 4, which, as shown in FIGS. 21 and 22 and 26 and 27, alternate from half on both sides of the vertical longitudinal median plane of the longitudinal spar 4 from the end regions 41, 41' elaborate engagement tabs 42, 43 exist.
  • these engagement parts are formed by a central engagement pin 44 worked out on an end face of the section 38 or 39 and a corresponding pin engagement opening 45 on the opposite end face.
  • This enables the two spar sections 38, 39 shown to be combined to form the spar unit 4;
  • further sections possibly again made of a material of different spring hardness, can be combined with one another to form the longitudinal beam unit 4.
  • this is also possible in the embodiment according to FIGS. 21 and 22 or 26 and 27, provided that both end regions 41, 41 'of the respective section 38, 39 are designed in the manner shown for mutual connection engagement.
  • FIG. 28 schematically shows various possibilities of such a formation of different hardness zones with the aid of sections 38, 39 by gluing or form-fitting connection engagement of the respectively opposite end regions.

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  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Springs (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Invalid Beds And Related Equipment (AREA)

Claims (16)

  1. Châlit ou élément de repos analogue, constitué par un lattis (5), avec des longerons (4) posés sur une plaque de base (13) et faits d'une matière élastique telle qu'une matière expansée près des deux bords extérieurs du lattis (5), et avec des traverses (7) soutenues par les longerons (4), les longerons (4) étant divisés, sur toute leur longueur, en différentes zones (16, 17, 18) ayant différentes élasticités, caractérisé en ce que les zones d'élasticité différente (16, 17, 18) sont formées dans au moins l'une (16) des zones de dureté (16, 17, 18) par au moins une chambre (15) ménagée dans les longerons (4) perpendiculairement à ceux-ci et qui modifie l'élasticité.
  2. Châlit suivant la revendication 1, caractérisé en ce que les chambres (15) sont constituées par des évidements dans la matière obtenus pendant l'opération de formage des longerons (4) ou réalisées sur le longeron (4) déjà formé, en particulier par estampage.
  3. Châlit suivant la revendication 1 ou 2, caractérisé en ce que les chambres (15) ont la forme de trous traversants ou de trous borgnes.
  4. Châlit suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que les chambres sont ménagées dans les longerons (4) dans la direction de la hauteur des longerons (4) ou dans la direction des traverses (7) du lattis (5), ou dans ces deux directions à la fois, et leur présence est de préférence limitée aux trois quarts inférieurs de la hauteur du longeron (4).
  5. Châlit suivant l'une quelconque des revendications 1 à 4, caractérisé en ce que les chambres (15) sont délimitées, sur la face inférieure du longeron, par la plaque de base (13) qui en est voisine.
  6. Châlit suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que les chambres (15) sont réalisées sous la forme d'espaces vides ou sont remplies, tout au moins en partie, de corps élastiques (25) ayant une élasticité différente de celle de la matière qui constitue le longeron, ou les deux à la fois.
  7. Châlit suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que les longerons (4) sont entourés extérieurement, au moins en partie, par une peau qui est formée automatiquement par le processus de formage des longerons (4) dans un moule à couler ou un moule d'injection, ou par une opération ultérieure de revêtement des longerons (4) constitués de blocs découpés dans une provision de matière.
  8. Châlit suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que la zone de dureté (16) des longerons (4) qui contient les chambres (15) modifiant l'élasticité est remplacée par un tronçon (38) de longeron fait d'une matière dont l'élasticité est différente de celle du reste de la matière du longeron, et qui est réuni à au moins un autre tronçon de matière (39) d'élasticité différente pour donner un longeron (4) complet.
  9. Châlit suivant la revendication 8, caractérisé en ce que les tronçons de matière (38, 39) d'élasticités différentes sont collés, à leurs surfaces d'about voisines, donnant ainsi une unité longeron (4).
  10. Châlit suivant la revendication 8, caractérisé en ce que les tronçons de matière (38, 39) d'élasticités différentes sont réunis, pour constituer une unité longeron (4), par un emboîtement d'assemblage à épuisement de formes de leurs parties terminales d'about voisines l'une de l'autre (41, 41'), les parties terminales (41, 41') comportant des éléments d'emboîtement (42, 43; 44, 45) qui se chevauchent mutuellement, de préférence dans la direction où les longerons (4) subissent des contraintes.
  11. Châlit suivant l'une quelconque des revendications 1 à 10, caractérisé en ce que les traverses (7) du lattis (5) s'appuient dans des ouvertures de réception (19) situées dans le tiers supérieur des longerons (4).
  12. Châlit suivant la revendication 11, caractérisé en ce que les ouvertures de réception (19) sont constituées par des trous traversants ou par des gorges transversales pratiquées dans la face supérieure des longerons (4) et en ce que les traverses (7) sont pourvues de préférence, à leurs extrémités libres, d'un morceau de matière molle telle que le feutre.
  13. Châlit suivant la revendication 11, caractérisé en ce que les ouvertures de réception (19) sont formées par des trous borgnes.
  14. Châlit suivant l'une quelconque des revendications 1 à 13, caractérisé en ce que les longerons (4) sont entourés chacun d'une gaine (21) en matière textile placée autour de leur surface extérieure et que les gaines (21) présentent, sur leurs côtés tournés l'un vers l'autre, des ouvertures d'introduction (22) pour les traverses (7) du lattis (5).
  15. Châlit suivant la revendication 14, caractérisé en ce que les ouvertures d'introduction sont formées chacune par plusieurs incisions du matériau de la gaine groupées en une configuration d'incisions (30) qui ont des orientations dont certaines sont différentes et que la configuration d'incisions (30) comprend de préférence au moins une incision verticale (31) du matériau de la gaine qui s'étend jusque dans le tiers inférieur de la hauteur des longerons (4).
  16. Châlit suivant l'une quelconque des revendications 1 à 15, avec un matelas rembourré pouvant être posé sur le lattis (5), caractérisé en ce que le matelas rembourré est constitué par une section de housse plate (8) fermée à l'extrémité, avec une paroi inférieure plane (9) qui s'applique sur le lattis (5), une couverture piquée (10) et une natte de soutien (11) placée entre elles dans la section de housse plate (8).
EP90122494A 1990-01-30 1990-11-26 Châlit ou dispositif similaire de repos Expired - Lifetime EP0439712B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9000996U 1990-01-30
DE9000996U DE9000996U1 (fr) 1990-01-30 1990-01-30

Publications (2)

Publication Number Publication Date
EP0439712A1 EP0439712A1 (fr) 1991-08-07
EP0439712B1 true EP0439712B1 (fr) 1994-08-10

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EP90122494A Expired - Lifetime EP0439712B1 (fr) 1990-01-30 1990-11-26 Châlit ou dispositif similaire de repos

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AT (1) ATE109635T1 (fr)
DE (2) DE9000996U1 (fr)

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WO1994014359A1 (fr) * 1992-12-22 1994-07-07 Rudolf Wuggenig Element se plaçant sur ou dans un matelas
BE1018284A3 (nl) * 2008-09-15 2010-08-03 Glocom Nv Bodem voor het ondersteunen van een matras van een bed of dergelijke.

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DE8909432U1 (fr) * 1989-08-04 1989-09-14 Matraflex Gmbh, 4930 Detmold, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19930032C1 (de) * 1999-06-30 2001-10-25 Siegfried Heerklotz Ruhe- und Liegeeinrichtung zum Einbau in ein Bettgestell

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DE9000996U1 (fr) 1991-02-14
ATE109635T1 (de) 1994-08-15
EP0439712A1 (fr) 1991-08-07
DE59006769D1 (de) 1994-09-15

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