SK101295A3 - Insulating balt - Google Patents
Insulating balt Download PDFInfo
- Publication number
- SK101295A3 SK101295A3 SK1012-95A SK101295A SK101295A3 SK 101295 A3 SK101295 A3 SK 101295A3 SK 101295 A SK101295 A SK 101295A SK 101295 A3 SK101295 A3 SK 101295A3
- Authority
- SK
- Slovakia
- Prior art keywords
- insulating felt
- felt according
- layer
- insulating
- fibers
- Prior art date
Links
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims description 16
- 239000012784 inorganic fiber Substances 0.000 claims description 10
- 239000003365 glass fiber Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000011490 mineral wool Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims 1
- 239000004033 plastic Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 230000001427 coherent effect Effects 0.000 abstract 1
- -1 polyethylene Polymers 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- E04B1/78—Heat insulating elements
-
- 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
- E04B2001/7695—Panels with adjustable width
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
Oblasť, technikyArea, techniques
Vynález sa týka izolačnej plsti tvorenej anorganickými vláknami, ktoré sú vzájomne spojené pomocou spojiva a ktoré vytvárajú, súdržnú poréznu vrstvu celkom alebo čiastočne uzavretú v priedušnom obale.The invention relates to an insulating felt composed of inorganic fibers which are bonded together by means of a binder and which form a cohesive porous layer wholly or partially enclosed in a breathable package.
Doterajší stav technikyBACKGROUND OF THE INVENTION
Tieto izolačné plsti, ktoré sú popísané napr. v dánskej prihláške (DK Patent Application) č. 0267/92 a v medzinárodnej prihláške (International Patent Application) č. PCT/DK92/00223, sa používajú napr. k izoláciám stropov a striech.These insulating felts, which are described e.g. in Danish application (DK Patent Application) no. 0267/92 and International Patent Application no. PCT / DK92 / 00223, e.g. to insulate ceilings and roofs.
Izolačné plsti sa obvykle dodávajú v určitých daných šírkach, odstupňovaných napr. po 10 cm začínajúc 50 cm a končiac 120 cm. I keď tieto šírky vyhovujú pre bežné odstupy medzi stropnicami a krokvami, ukázalo sa v praxi, že nie sú ľahko použiteľné pre zhotovenie izolačných vrstiev bez medzier alebo spárov.Insulating felt is usually supplied in certain given widths, graduated e.g. 10 cm starting at 50 cm and ending at 120 cm. While these widths are suitable for common spacings between joists and rafters, it has been shown in practice that they are not readily usable for making insulating layers without gaps or joints.
V praxi sa preto vyžaduje rezanie plstí na takú šírku, aby plsť presne zapadla do izolovaných medzier.In practice, therefore, cutting the felt to a width such that the felt fits exactly into the insulated gaps is required.
Rezaním sa obal otvorí a tým vzniká riziko, že sa pri manipulácii budú uvoľňovať z izolačnej plsti jednotlivé vlákna. Pretože sa rezanie väčšinou uskutočňuje v relatívne malých a stiesnených priestoroch, môže sa zvyšovať koncentrácia vlákien vo vzduchu na príliš vysokú hodnotu a tieto vlákna sú potom vdychované izolujúcimi pracovníkmi.Cutting the package opens and there is a risk that individual fibers will be released from the insulating felt during handling. Since the cutting is mostly carried out in relatively small and confined spaces, the concentration of the fibers in the air can be increased to too high a value and these fibers are then inhaled by the insulators.
-29932-29,932
Podstata vynálezuSUMMARY OF THE INVENTION
Táto nevýhoda môže byť odstránená použitím izolačných plstí podľa predloženého vynálezu.This disadvantage can be overcome by using the insulating felt according to the present invention.
Izolačné plsti podľa predloženého vynálezu sa vyznačujú tým, že súdržná porézna vrstva obsahuje aspoň jednu priebežnú zónu, ktorá je ľahšie stlačiteľná ako zostávajúca časť vrstvy.The insulating felt according to the present invention is characterized in that the cohesive porous layer comprises at least one continuous zone, which is more easily compressible than the rest of the layer.
Pomocou tejto relatívne ľahko stlačiteľnej priebežnej zóny môže pracovník uskutočňujúci izoláciu prispôsobiť izolačnú plsť izolovanému priestoru, bez toho by musel otvoriť obal a tým do okolnej atmosféry uvoľniť voľné vlákna.With this relatively easily compressible continuous zone, the insulator can adapt the insulating felt to the insulated space without having to open the package and thereby free loose fibers into the surrounding atmosphere.
Priebežná zóna sa môže nachádzať kdekoľvek v poréznej vrstve, ale dáva sa prednosť tomu, aby tvorila okrajovú zónu, čo uľahčí prispôsobenie izolačnej plsti izolovanému priestoru.The through zone may be located anywhere in the porous layer, but is preferred to form an edge zone, which will facilitate the adaptation of the insulating felt to the insulated space.
Vrstva z anorganických vlákien s relatívne ľahko stlačiteľnou okrajovou zónou sa môže vyrábať rôznymi spôsobmi, napr. valcovaním okrajovej zóny, viď. DE-3203622 a WO 91/02128. V dôsledku valcovania dôjde k čiastočnému porušeniu prepojenia medzi vláknami inak nepodajnej vrstvy, bez toho aby došlo k zničeniu štruktúry vrstvy. Po tejto úprave sa preto vzájomná poloha vlákien v opracovanej okrajovej zóne môže snadno meniť.The inorganic fiber layer with a relatively easily compressible edge zone can be produced in various ways, e.g. by rolling the peripheral zone, cf. DE-3203622 and WO 91/02128. As a result of the rolling, the interconnection between the fibers of the otherwise non-bulky layer will be partially broken without destroying the layer structure. Therefore, after this treatment, the relative position of the fibers in the machined edge zone can easily change.
Izolačné plsti podľa tohoto vynálezu sú s výhodou pravouhlé a porézne vrstvy sú s výhodou opatrené okrajovou zónou na obidvoch svojich protiľahlých okrajoch, pričom táto zóna je relatívne ľahko stlačiteľná.The insulating felts of the present invention are preferably rectangular and the porous layers are preferably provided with an edge zone at both their opposite edges, the zone being relatively easily compressible.
Šírka relatívne ľahko stlačiteľnej okrajovej zóny (alebo okrajových zón) robia s výhodou okolo 7,5 cm u izolačných plstí, ich šírky sú odstupňované po 10 cm.The width of the relatively easily compressible edge zone (or edge zones) is preferably about 7.5 cm in the case of the insulating felt, their widths being increments of 10 cm.
Prostredníctvom ľahko stlačiteľných okrajových zón na protiľahlých okrajoch týchto plstí je v praxi možnéBy virtue of the easily compressible edge zones on the opposite edges of these felt, it is possible in practice
-39932 prispôsobiť izolačnej plsti medzerám o akejkoľvek šírke.-39932 to adapt the insulation felt to gaps of any width.
Pojem anorganické vlákna, ako je tu používaný, zahrňuje vlákna minerálnej vlny, sklenené vlákna, troskové vlákna a odpovedajúce syntetické vlákna pripravené z východzích minerálnych látok.The term inorganic fibers as used herein includes mineral wool fibers, glass fibers, slag fibers and corresponding synthetic fibers prepared from starting minerals.
Vrstva z anorganických vlákien sa s výhodou skladá z vlákien z minerálnej vlny a jej hustota s výhodou činí od 20 kg/m3 do 60 kg/m3.The inorganic fiber layer preferably consists of mineral wool fibers and preferably has a density of from 20 kg / m 3 to 60 kg / m 3 .
U sklenených vlákien leží hustota v rozmedzí od 10 kg/m3 do 60 kg/m3.For glass fibers, the density ranges from 10 kg / m 3 to 60 kg / m 3 .
Použitým spojivom môže byť akékoľvek spojivo, ktoré sa bežne používa pri výrobe materiálov z anorganických vlákien. Dáva sa však prednosť fenolickým živiciam.The binder used can be any binder commonly used in the manufacture of inorganic fiber materials. However, phenolic resins are preferred.
Priedušný obal je s výhodou tvorený netkanou organickou alebo anorganickou textíliou. Príklady vhodných obalov predstavujú obaly z organických syntetických vlákien, ako napr. z polyetylénových, polypropylénových, nylonových alebo polyesterových vlákien. Obaly môžu byť tvorené tkaninou alebo textíliou z týchto vlákien, napr. o plošnej váhe od 5 do 100 g/m3.The breathable cover is preferably a non-woven organic or inorganic fabric. Examples of suitable packaging are organic synthetic fiber packaging, such as e.g. of polyethylene, polypropylene, nylon or polyester fibers. The sheaths may consist of a fabric or fabric of these fibers, e.g. Weighing from 5 to 100 g / m 3 .
Priedušný obal môže tiež byť zhotovený priamo na plsti, t.j. striekaním alebo iným spôsobom, pri ktorom sú vlákna priamo aplikované na poréznu vrstvu.The breathable wrapper may also be made directly on the felt, i.e., the felt. spraying or other method in which the fibers are directly applied to the porous layer.
Vhodné sú netkané obaly pripravené z prírodných vlákien, ako sú napríklad celulózové, ľanové, kokosové, konopné a iné podobné vlákna.Nonwoven wrappers prepared from natural fibers, such as cellulose, flax, coconut, hemp and other similar fibers, are suitable.
Uvedené skutočnosti platia i pre obaly pripravené z modifikovanej celulózy, napr. pripravené z viskóznych vlákien alebo z vlákien umelého hodvábu.The above also applies to packages prepared from modified cellulose, e.g. prepared from viscose rayon or rayon.
Príklady vhodných netkaných anorganických materiálov zahrňujú plošné textílie zo sklenených vlákien o plošnej váhe od 10 do 100 g/m2, ktoré sú pripravené zo sklenených vlákien o hrúbke okolo 7 až 13 μνα.Examples of suitable inorganic materials include nonwoven webs of glass fibers having a weight of 10-100 g / m 2, which are prepared from glass fibers having a thickness of about 7 to 13 μνα.
ako alternatíva k netkaným materiálom môžu byť preas an alternative to nonwoven materials may be pro
-49932 obaly použité perforované fólie, napr. polyetylénové alebo polypropylénové o plošnej váhe od 10 g/m2 do 150 g/m2, alebo kovová fólia, napr. hliníková. Perforovaná fólia môže mať. formu vrstvenej štruktúry, vrátane štruktúry skladajúcej sa z fólie z plastu a z vrstvy papiera alebo štruktúry skladajúcej sa z fólie z plastu a z kovovej fólie.-49932 packaging used perforated foil, e.g. polyethylene or polypropylene having a basis weight of from 10 g / m 2 to 150 g / m 2 , or a metal foil, e.g. aluminum. The perforated film may have. in the form of a layered structure, including a structure consisting of a plastic film and a paper layer, or a structure consisting of a plastic film and a metal film.
Obal môže byť zhotovený oddelene, ale môže byť tiež zhotovený priamo na vrstve z anorganických vlákien, ako je napr. popísané v dánskej prihláške (DK Application) č. 267/92 a V U.S. Patente č. 4,596,737.The coating may be made separately, but may also be made directly on the inorganic fiber layer, such as e.g. described in the Danish application (DK Application) no. 267/92 and U.S. Pat. Patente no. 4,596,737.
Prehľad obrázkov na výkreseOverview of the figures in the drawing
Vynález bude podrobnejšie popísaný pomocou výkresov, kde:The invention will be described in more detail with reference to the drawings, in which:
Obr. 1 predstavuje izolačnú plsť podľa tohoto vynálezu pri pohľade z vrchu, pričom časť obalu bola odstránené.Fig. 1 shows an insulating felt according to the invention, seen from above, with part of the package removed.
Obr. 2 je rez pozdĺž priamky II-II izolačnou plsťou podľa obr. 1.Fig. 2 is a section along line II-II of the insulating felt of FIG. First
Príklady uskutočnenia vynálezuDETAILED DESCRIPTION OF THE INVENTION
Na výkresoch i označuje vrstvu z anorganických vlákien, ktoré sú vzájomne spojené pomocou spojiva, čím vznikla porézna vrstva. Vrstva z anorganických vlákien je uzavretá v obale 2 z netkanej priedušnej látky. Vrstva z anorganických vlákien 1 má na svojich bočných okrajoch okrajové zóny 3, ktoré boli upravené tak, aby boli ľahko stlačiteľné, napr. valcovaním.In the drawings, i denotes a layer of inorganic fibers which are bonded together by a binder to form a porous layer. The inorganic fiber layer is enclosed in a nonwoven breathable wrapping 2. The inorganic fiber layer 1 has, at its side edges, edge zones 3 which have been adapted to be easily compressible, e.g. rolling.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK18293A DK18293D0 (en) | 1993-02-17 | 1993-02-17 | INSULATION MATTERS |
PCT/DK1994/000067 WO1994019555A1 (en) | 1993-02-17 | 1994-02-17 | Insulating batt |
Publications (1)
Publication Number | Publication Date |
---|---|
SK101295A3 true SK101295A3 (en) | 1996-03-06 |
Family
ID=8090703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SK1012-95A SK101295A3 (en) | 1993-02-17 | 1994-02-17 | Insulating balt |
Country Status (5)
Country | Link |
---|---|
AU (1) | AU6154594A (en) |
CZ (2) | CZ207995A3 (en) |
DK (1) | DK18293D0 (en) |
SK (1) | SK101295A3 (en) |
WO (1) | WO1994019555A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5848509A (en) * | 1995-08-31 | 1998-12-15 | Certainteed Corporation | Encapsulated insulation assembly |
DE29518473U1 (en) * | 1995-11-21 | 1996-01-25 | Promat Gmbh, 40880 Ratingen | Panel-shaped high-temperature thermal insulation element |
GB2317403B (en) * | 1996-09-20 | 2001-01-24 | Rockwool Int | A process for the preparation of a layered insulating board,and a layered insulating board |
AU6631398A (en) * | 1997-03-21 | 1998-10-20 | Isover S.A. | Insulating board |
DK1803862T3 (en) * | 2001-06-02 | 2009-11-16 | Rockwool Mineralwolle | Insulating plate with compressible edge zones and method for its manufacture |
DE60222691T3 (en) † | 2001-11-14 | 2020-10-01 | Rockwool International A/S | MINERAL FIBER FLEECE |
EP1715111A1 (en) | 2005-04-19 | 2006-10-25 | Primero Schiefer GmbH | Insulation means |
DE102005018577A1 (en) * | 2005-04-21 | 2006-10-26 | Saint-Gobain Isover G+H Ag | Mineral wool insulation sheet with an insulation layer for the clamping installation between boundary surfaces |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7612071A (en) * | 1976-10-29 | 1978-05-03 | Nederlandse Steenwolfabriek Nv | MINERAL WOOL ROOF COVERING PLATE. |
DE3203622A1 (en) * | 1981-09-17 | 1983-04-07 | Deutsche Rockwool Mineralwoll-GmbH, 4390 Gladbeck | Method and apparatus for manufacturing a sound- and/or heat-insulating mineral fibre slab or web |
DE8311026U1 (en) * | 1983-04-14 | 1983-07-21 | Rheinhold & Mahla Gmbh, 6800 Mannheim | SELF-SUPPORTING INSULATION PLATE |
FR2591253A1 (en) * | 1985-12-09 | 1987-06-12 | Humeau Michel | Laterally compressible rigid panel for the thermal insulation of roofs and vapour barrier for the protection of the compressible material |
DE59003968D1 (en) * | 1989-07-31 | 1994-02-03 | Flumroc Ag Flums | METHOD AND DEVICE FOR PRODUCING A COMPRESSIBLE ZONE IN AT LEAST ONE EDGE AREA OF A HEAT, SOUND AND / OR FIRE-INSULATING MINERAL FIBER PANEL OR TRAIN AND MINERAL FIBER PANELS PRODUCED BY THE PROCESS. |
DK135391D0 (en) * | 1991-07-15 | 1991-07-15 | Rockwool Int | Insulation element and insulation layer made up of such elements |
FI90272B (en) * | 1992-02-10 | 1993-09-30 | Paroc Oy Ab | Insulating product and process for its manufacture |
-
1993
- 1993-02-17 DK DK18293A patent/DK18293D0/en not_active Application Discontinuation
-
1994
- 1994-02-17 CZ CZ952079A patent/CZ207995A3/en unknown
- 1994-02-17 WO PCT/DK1994/000067 patent/WO1994019555A1/en not_active Application Discontinuation
- 1994-02-17 SK SK1012-95A patent/SK101295A3/en unknown
- 1994-02-17 CZ CZ19954778U patent/CZ4997U1/en not_active IP Right Cessation
- 1994-02-17 AU AU61545/94A patent/AU6154594A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
CZ4997U1 (en) | 1996-07-23 |
AU6154594A (en) | 1994-09-14 |
WO1994019555A1 (en) | 1994-09-01 |
DK18293D0 (en) | 1993-02-17 |
CZ207995A3 (en) | 1996-04-17 |
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