EP0029277B1 - Roof or wall construction, provided with heat- and/or sound insulation panels - Google Patents

Roof or wall construction, provided with heat- and/or sound insulation panels Download PDF

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Publication number
EP0029277B1
EP0029277B1 EP80201089A EP80201089A EP0029277B1 EP 0029277 B1 EP0029277 B1 EP 0029277B1 EP 80201089 A EP80201089 A EP 80201089A EP 80201089 A EP80201089 A EP 80201089A EP 0029277 B1 EP0029277 B1 EP 0029277B1
Authority
EP
European Patent Office
Prior art keywords
roof
angle
insulation panel
section
beams
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
Application number
EP80201089A
Other languages
German (de)
French (fr)
Other versions
EP0029277A1 (en
Inventor
Jean Joseph Marie Offermann
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.)
Braas GmbH
Redland-Braas-Bredero Europa (rbb) Bv
Original Assignee
Braas GmbH
Redland-Braas-Bredero Europa (rbb) Bv
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
Application filed by Braas GmbH, Redland-Braas-Bredero Europa (rbb) Bv filed Critical Braas GmbH
Priority to AT80201089T priority Critical patent/ATE4131T1/en
Publication of EP0029277A1 publication Critical patent/EP0029277A1/en
Application granted granted Critical
Publication of EP0029277B1 publication Critical patent/EP0029277B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
    • E04D13/1606—Insulation of the roof covering characterised by its integration in the roof structure
    • E04D13/1612—Insulation of the roof covering characterised by its integration in the roof structure the roof structure comprising a supporting framework of roof purlins or rafters
    • E04D13/1625—Insulation of the roof covering characterised by its integration in the roof structure the roof structure comprising a supporting framework of roof purlins or rafters with means for supporting the insulating material between the purlins or rafters
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/7654—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising an insulating layer, disposed between two longitudinal supporting elements, e.g. to insulate ceilings
    • E04B1/7658—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising an insulating layer, disposed between two longitudinal supporting elements, e.g. to insulate ceilings comprising fiber insulation, e.g. as panels or loose filled fibres
    • E04B1/7662—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising an insulating layer, disposed between two longitudinal supporting elements, e.g. to insulate ceilings comprising fiber insulation, e.g. as panels or loose filled fibres comprising fiber blankets or batts
    • E04B1/7666—Connection of blankets or batts to the longitudinal supporting elements

Definitions

  • the invention relates to a roof or wall construction of a building, which inwardly thereof is provided with regularly spaced parallel beams, against which rigid insulation panels are attached, each insulation panel being placed between opposed sides of two adjacent beams, said sides of said beams being provided with angle sections and along the corresponding edges of the insulation panel further angle sections are provided cooperating by a snap fit with the angle sections attached to the beams.
  • Special fixing members also in the form of short angle sections are applied, which at distances from each other are connected with the angle sections attached to the beams.
  • the panels must consist of insulating material they are not strong.
  • each insulation panel does not consist of a self-supporting panel but is formed by arranging a ceiling panel of metal sheet, above which a layer of insulation material is present.
  • the edges of the metal ceiling panels are carried out as angle sections.
  • the beams also consist of metal and are provided with angle sections. The beams are not used for supporting the roof structure but are supported by another ceiling panel of metal sheet.
  • said object is attained in that the further angle sections are attached to the corresponding edges of the insulation panel and each are provided with a projecting ledge and in that the angle section .
  • attached to a beam has a Z-shaped or L-shaped cross-section with right angles or a right angle respectively and a resilient flange directed towards the roof or the wall, whereby the ledge of the angle section snaps behind the free edge of said resilient flange.
  • the panels are, as it were, surrounded by a frame, in consequence of which they are self-supporting.
  • the angle sections on the beams need not to be wide.
  • the panels are assembled and disassembled perpendicularly with respect to their plane.
  • the angle sections can be invisibly attached to the beams.
  • the angle sections When the angle sections are attached to the beams use can be made of a gauge to space the angle sections in the proper way. If said spacing does not correspond to the spacing of the beams, fitting laths can be placed between the angle sections and the beams. This is also necessary if the cross-sections of the beams are not rectangular, but for example half round, such as may be found in old buildings.
  • the invention is not only intended for old building constructions. It can be applied with the same effect to new building constructions. Also then the spacing of rafters or girders is not always constant.
  • a roof is designated by 1, which roof can be of any type. It can a flat roof or an inclined roof.
  • the roof can be covered with plates, roof tiles, etc. However, such a roof is always inwardly thereof provided with parallel rafters or girders, designated by 2.
  • the insulation panels are designated by 3 and for example may consist of glass fibre web designated by 4, covered on both sides with rigid layers 5 and 6.
  • the lowermost layer 5 may be for example a fire resisting or fire retarding layer, which possibly also can serve as a decoration. By this layer 5 the rigidity of the panel 3 is improved.
  • the insulation panel 3 must have a sufficient rigidity to show only a slight deflection with a normal distance between the girders 2 of 110--120 cm.
  • the upper plate 6 can consist of a waterproof layer to prevent possible moisture seepage from penetrating into the insulating panel 3.
  • the air space between the panel 3 and the roof 1 serves for ventilation and discharge of vapour.
  • At least two edges of the insulation panel 3 are provided with an angle section designated by 7.
  • This angle section 7 is shown enlarged in fig. 3.
  • the angle section has a substantially U-shaped cross-section with right angles and preferably consist of a plastics material.
  • the bottom of the U is designated by 7a and is stepped.
  • Both legs are designated by 7b and 7c.
  • Bottom 7a is provided with a fixing member 8, by means of which the angle section 7 can be attached to the insulation panel 3.
  • Both legs 7b and 7c grip around the edge of the insulating panel 3. It is possible to omit the leg 7c, in which case the angle section 7 is L-shaped.
  • the girders 2 which in fig. 1 and 2 have a rectangular cross-section, are provided with angle sections designated by 9.
  • the angle section preferably consist also of a plastics material.
  • This angle section 9 is shown enlarged in Fig. 2.
  • the angle section 9 has in cross-section a Z-shaped form with right angles.
  • the central web is designated as 9a and the both legs as 9b and 9c.
  • the angle section 9 may be attached to the girder 2 by means of screws or nails 10. It is possible to glue the angle section 9 to the girder 2.
  • the angle section 9 contains a somewhat resilient flange 9d, which is joined at the transition between the legs 9a and 9b. This flange 9d is directed towards the roof 1.
  • angle section 9 can also be L-shaped. In that case leg 9b is lacking.
  • the angle sections 7 can be applied beforehand in the factory or in the workshop to the insulation panel 3.
  • all angle sections 9 are attached first to the girders concerned. If the girder spacing shows variations, a fitting lath can be applied between the leg 9a and the sidewall of each girder 2. In old building constructions it can be found that the girders do not have a rectangular cross-section. In that event it will also be necessary to make use of fitting lathes. Said fitting lathes are not shown in the drawing. To obtain the proper spacing of the angle sections 9 use may be made of a gauge not shown.
  • angle sections 7 and 9 consist of a plastics material, no cold bridges are formed. Moreover, air volumes are created between the angle sections 7 and 9, giving additional insulation.
  • Fig. 4 nearly corresponds to Fig. 3; however, the bottom 7a extends in the same direction as the lip 9d. Consequently the gap between the bottom 7a and the flange 9d is smaller, so that an additional lip 7d is not required.
  • each of the end faces is provided with an angle section 7, without a lip 7d, which angle sections 7 are rotated with respect to each other by 180°.
  • the lip 7d may possibly also be applied to the angle section 9 and then extend in line with the leg 9b. This is not shown in the drawing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Building Environments (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)

Abstract

Roof or wall construction of a building, which inwardly is provided with regularly spaced beams (2) against which somewhat rigid insulation panels (3) are attached, each insulation panel (3) being placed between facing sides of two juxtaposed beams (2), said sides of said beams (2) being provided with profile sections (9) and the corresponding endfaces of the insulation panel (3) being provided with fixed profile sections (7) cooperating in a snapping way with the profile sections (9) applied to the beams (2).

Description

  • The invention relates to a roof or wall construction of a building, which inwardly thereof is provided with regularly spaced parallel beams, against which rigid insulation panels are attached, each insulation panel being placed between opposed sides of two adjacent beams, said sides of said beams being provided with angle sections and along the corresponding edges of the insulation panel further angle sections are provided cooperating by a snap fit with the angle sections attached to the beams.
  • A construction of this kind is known from NL-A-78 00197. According to said patent application compressible strips of mineral wool are placed between the beams and the opposed longitudinal edges of the rigid panels. By this it is possible to mount the rigid panels, while no cold bridges are created and the distance between the beams is not very critical. Further no difficulties will be encountered in case the cross-section of the rafters or girders, thus the beams, is not rectangular because angle sections are applied before. After assembling the longitudinal edges of the rigid panels and also the strips of mineral wool rest on the flanges of the angle sections.
  • Special fixing members also in the form of short angle sections are applied, which at distances from each other are connected with the angle sections attached to the beams.
  • As said strips and said edges of the panels have to rest on the flanges of the angle sections the latter have to be rather wide, which is detrimental to the appearance of the construction.
  • Because the fixing members grip behind the upright leg of each angle section, said angle section cannot be invisibly attached to the beams.
  • Disassembling of the panels is very difficult.
  • Because the panels must consist of insulating material they are not strong.
  • It is remarked that from US-­A-­4,155,206, especially fig. 3, a roof structure is known, which inwardly thereof is provided with mgu- larly spacsd parallel beams, against which rigid insulation panels are attached, each insulation panel being placed between the opposed sides of two adjacent beams, said sides of said beams being provided with angle sections and the corresponding edges of the insulation panels are also provided with angle sections which cooperate by a snap fit with the angle sections on the beams.
  • In this case each insulation panel does not consist of a self-supporting panel but is formed by arranging a ceiling panel of metal sheet, above which a layer of insulation material is present. The edges of the metal ceiling panels are carried out as angle sections. The beams also consist of metal and are provided with angle sections. The beams are not used for supporting the roof structure but are supported by another ceiling panel of metal sheet.
  • It is the object of the invention to provide a construction which, while maintaining all advantages of the known construction will make superfluous the strips of mineral wool and by which are avoided all mentioned disadvantages.
  • According to the invention said object is attained in that the further angle sections are attached to the corresponding edges of the insulation panel and each are provided with a projecting ledge and in that the angle section . attached to a beam has a Z-shaped or L-shaped cross-section with right angles or a right angle respectively and a resilient flange directed towards the roof or the wall, whereby the ledge of the angle section snaps behind the free edge of said resilient flange.
  • Thus, the panels are, as it were, surrounded by a frame, in consequence of which they are self-supporting.
  • The angle sections on the beams need not to be wide. The panels are assembled and disassembled perpendicularly with respect to their plane.
  • The angle sections can be invisibly attached to the beams.
  • When the angle sections are attached to the beams use can be made of a gauge to space the angle sections in the proper way. If said spacing does not correspond to the spacing of the beams, fitting laths can be placed between the angle sections and the beams. This is also necessary if the cross-sections of the beams are not rectangular, but for example half round, such as may be found in old buildings.
  • After application of all angle sections in the building the insulation is very simple. The insulation panels provided with angle sections only have to be pushed between the beams until the cooperating angle sections snap into each other.
  • It will be clear that the invention also may be applied to walls. In that case first of all beams have to be attached against the inner side of the wall.
  • Also then a static air volume remains between the insulation panels and the wall to be insulated, which improves the insulation.
  • The invention is not only intended for old building constructions. It can be applied with the same effect to new building constructions. Also then the spacing of rafters or girders is not always constant.
  • The invention will be explained with reference to the drawings, in which examples of the embodiment of the invention are shown.
    • Fig. 1 shows a section of a part of a roof construction provided with an insulation panel;
    • Figures 2 and 3 show enlarged details; and
    • Figure 4 corresponds to fig. 3 and shows a modified embodiment.
  • In fig. 1 a roof is designated by 1, which roof can be of any type. It can a flat roof or an inclined roof. The roof can be covered with plates, roof tiles, etc. However, such a roof is always inwardly thereof provided with parallel rafters or girders, designated by 2.
  • The insulation panels, known per se, are designated by 3 and for example may consist of glass fibre web designated by 4, covered on both sides with rigid layers 5 and 6. The lowermost layer 5 may be for example a fire resisting or fire retarding layer, which possibly also can serve as a decoration. By this layer 5 the rigidity of the panel 3 is improved. The insulation panel 3 must have a sufficient rigidity to show only a slight deflection with a normal distance between the girders 2 of 110--120 cm. The upper plate 6 can consist of a waterproof layer to prevent possible moisture seepage from penetrating into the insulating panel 3. The air space between the panel 3 and the roof 1 serves for ventilation and discharge of vapour.
  • At least two edges of the insulation panel 3 are provided with an angle section designated by 7. This angle section 7 is shown enlarged in fig. 3. The angle section has a substantially U-shaped cross-section with right angles and preferably consist of a plastics material. The bottom of the U is designated by 7a and is stepped. Both legs are designated by 7b and 7c. Bottom 7a is provided with a fixing member 8, by means of which the angle section 7 can be attached to the insulation panel 3. Both legs 7b and 7c grip around the edge of the insulating panel 3. It is possible to omit the leg 7c, in which case the angle section 7 is L-shaped.
  • Also the girders 2, which in fig. 1 and 2 have a rectangular cross-section, are provided with angle sections designated by 9. The angle section preferably consist also of a plastics material. This angle section 9 is shown enlarged in Fig. 2. The angle section 9 has in cross-section a Z-shaped form with right angles. The central web is designated as 9a and the both legs as 9b and 9c. The angle section 9 may be attached to the girder 2 by means of screws or nails 10. It is possible to glue the angle section 9 to the girder 2.
  • The angle section 9 contains a somewhat resilient flange 9d, which is joined at the transition between the legs 9a and 9b. This flange 9d is directed towards the roof 1.
  • Instead of having a Z-shape the angle section 9 can also be L-shaped. In that case leg 9b is lacking.
  • From the drawing it will be clear that if the insulating panel 3 is moved upwardly between the two girders 2, the free edge of the flange 9d will snap behind the step in the leg 7a of the angle section 7.
  • The angle sections 7 can be applied beforehand in the factory or in the workshop to the insulation panel 3. In the building to be insulated all angle sections 9 are attached first to the girders concerned. If the girder spacing shows variations, a fitting lath can be applied between the leg 9a and the sidewall of each girder 2. In old building constructions it can be found that the girders do not have a rectangular cross-section. In that event it will also be necessary to make use of fitting lathes. Said fitting lathes are not shown in the drawing. To obtain the proper spacing of the angle sections 9 use may be made of a gauge not shown.
  • As the angle sections 7 and 9 consist of a plastics material, no cold bridges are formed. Moreover, air volumes are created between the angle sections 7 and 9, giving additional insulation.
  • To cover the gap between the angle sections 7 and 9 it is possible to apply an additional leg 7d to the angle section 7, in Fig. 2 designated in dotted lines.
  • Fig. 4 nearly corresponds to Fig. 3; however, the bottom 7a extends in the same direction as the lip 9d. Consequently the gap between the bottom 7a and the flange 9d is smaller, so that an additional lip 7d is not required.
  • For demounting the insulation panels 3 it is necessary to push the flanges 9d outwardly by means of a screw driver or the like. This would be impossible if the leg 7d is present. However, said leg 7d has then to be provided with interruptions to be able to apply a screw driver or the like.
  • The same angle sections 7 could be used on the other end faces of the panel 3 to join two adjacent insulation panels with a groove. For that purpose each of the end faces is provided with an angle section 7, without a lip 7d, which angle sections 7 are rotated with respect to each other by 180°.
  • The lip 7d may possibly also be applied to the angle section 9 and then extend in line with the leg 9b. This is not shown in the drawing.

Claims (9)

1. Roof or wall structure (1) of a building, which inwardly thereof is provided with regularly spaced parallel beams (2), against which rigid insulation panels (3) are attached, each insulation panel (3) being placed between opposed sides of two adjacent beams (2),. said sides of said beams (2) being provided with angle sections (9) and along the corresponding edges of the insulation panel (3) further angle sections (7) are provided cooperating by a snap fit with the angle sections (9) attached to the beams (2), characterized in that the further angle sections (7) are attached to the corresponding edges of the insulation panel (3) and each are provided with a projecting ledge and in that the angle section (9) attached to a beam (2) has a Z-shaped or L-shaped cross-section with right angles or a right angle respectively and a resilient flange (9d) directed towards the roof (1) or the wall, whereby the ledge of the angle section (7) snaps behind the free edge of said resilient flange (9d).
2. Roof or wall construction according to claim 1, characterized in that the resilient flange (9d) joins the web of the angle section (9) attached to a beam (2) near one of the right angles or one of the edges.
3. Roof or wall construction according to claim 1 or 2, characterized in that the angle section (7) attached to the insulation panel (3) has a L-shaped or U-shaped cross-section, of which the leg (7a) lying against the edge of the insulation panel (3) is provided with the projecting ledge snapping behind the free edge of the flange (9d) of the angle section (9) on the beam (2) cooperating therewith, which leg (7a) being further provided with fixing means to connect the angle section (7) with the insulation panel (3).
4. Roof or wall construction according to claim 3, characterized in that the leg (7a) lying against the edge of the insulation panel (3) is stepped, whereby the projecting ledge is formed by the step.
5. Roof or wall structure according to Claim 3 or 4, characterized in that at a U-shaped angle section (7) both parallel legs (7b, 7c) lie against the front- and back surfaces (5, 6) of the insulation panel (3).
6. Roof or wall construction according to claim 1, 2, 3, 4 or 5, characterized in that also the other edges of each insulation panel (3) are provided with identical angle sections, both angle sections facing in opposite directions, so that adjacent angle sections of adjacent insulation panels (3) fit together leaving a groove therebetween.
7. Roof or wall construction according to claim 1, 2, 3, 4, 5 or 6, characterized in that the angle section (7) on each insulation panel (3) has a lip (7d) on its leg facing away from the roof (1) or the wall, said lip (7d) being directed away from the edge of the insulation panel (3), said lip (7d) covering any gap between angle sections (7, 9) cooperating with each other.
8. Roof or wall construction according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that the angle section (9) on the beam (2) has a lip on its leg facing from the roof (1) or the wall, said lip being directed from a corner of the angle section (9) on the beam (2) towards the edge of the insulation panel (3), said lip covering any gap between angle sections (7, 9) cooperating with each other.
9. Roof or wall construction according to claim 7 or 8, characterized in that the lip is provided with interruptions to make possible demounting of the insulation panels (3).
EP80201089A 1979-11-15 1980-11-13 Roof or wall construction, provided with heat- and/or sound insulation panels Expired EP0029277B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80201089T ATE4131T1 (en) 1979-11-15 1980-11-13 ROOF OR WALL CONSTRUCTION COVERED WITH THERMAL AND/OR ACOUSTIC PANELS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7908365 1979-11-15
NL7908365A NL7908365A (en) 1979-11-15 1979-11-15 ROOF OR WALL CONSTRUCTION EQUIPPED WITH HEAT AND / OR SOUND INSULATION PANELS.

Publications (2)

Publication Number Publication Date
EP0029277A1 EP0029277A1 (en) 1981-05-27
EP0029277B1 true EP0029277B1 (en) 1983-07-13

Family

ID=19834187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80201089A Expired EP0029277B1 (en) 1979-11-15 1980-11-13 Roof or wall construction, provided with heat- and/or sound insulation panels

Country Status (5)

Country Link
EP (1) EP0029277B1 (en)
AT (1) ATE4131T1 (en)
DE (1) DE3064154D1 (en)
NL (1) NL7908365A (en)
NO (1) NO803445L (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH647832A5 (en) * 1983-03-14 1985-02-15 Praz Jean Luc DEVICE FOR FIXING A ROOF INSULATION.
FR2756306B1 (en) * 1996-11-22 1998-12-31 Piernas Michel FIRMING ROOF INSULATION PANEL
DE19732730A1 (en) * 1997-07-30 1999-02-18 Karin Lautenschlaeger Roof construction
DE19811036B4 (en) * 1998-03-13 2006-11-23 ROTEC Radebeuler Oberflächen-Technik GmbH Wall segment for a cabin construction
FR2806431B1 (en) * 2000-03-15 2002-12-06 Rose Eludis Charpente SYSTEM FOR FIXING THERMAL INSULATION PANELS AGAINST THE FRAMES OF A FRAME
GB2443025A (en) * 2006-10-19 2008-04-23 John Ralph Pitched roof energy saving insulating system
NL2004953C2 (en) 2010-06-23 2011-12-27 Isobouw Systems Bv PROFILE SYSTEM FOR INSTALLING INSULATION PANELS.
US20120151869A1 (en) * 2010-12-20 2012-06-21 United States Gypsum Company Insulated drywall ceiling on steel "c" joists
BE1021492B1 (en) * 2012-09-26 2015-12-03 Unilin Bvba METHOD AND SET OF ACCESSORIES FOR INSULATING A ROOF CONSTRUCTION
GB2525048B (en) * 2014-04-11 2020-07-01 Cureton Jason Housing and retaining apparatus for insulation boarding

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2162193C3 (en) * 1971-12-15 1982-01-14 Thermodach Dachtechnik Gmbh, 8591 Poppenreuth Thermally insulating sub-roof
DE2700468C2 (en) * 1977-01-07 1979-02-15 Braas & Co Gmbh, 6000 Frankfurt Thermal insulation lining for roofs supported by rafters
US4155206A (en) * 1978-04-19 1979-05-22 Howmet Corporation Insulated metal roofing system

Also Published As

Publication number Publication date
ATE4131T1 (en) 1983-07-15
NL7908365A (en) 1981-06-16
EP0029277A1 (en) 1981-05-27
NO803445L (en) 1981-08-03
DE3064154D1 (en) 1983-08-18

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