baber/WOPTO huggingface dataset:
Patent IT-1315273-B1 (IT)
Title: Use of contrast agents excreted by the hepatobiliary route for the visualization of the intestinal rumen, particularly for studying inflammatory states, irritable colon, constipation, polyposis, cancer or pharmacological treatments
Inventor: KNOPP MICHAEL V
IPC: A61B/
Filed: 1999-12-29
Granted: 2003-02-03
Abstract: The use of contrast agents excreted by the hepatobiliary route in a percentage equal to or exceeding 0.5% of the dose administered for the preparation of diagnostic contrast compositions useful for the visualization of the intestinal lumen is new.
Patent IT-1267590-B1 (IT)
Title: Asciugabiancheria con dispositivi perfezionati per la determinazione del tempo di asciugatura
Inventor: HABERL INGO
IPC: D06F58/28
Filed: 1994-10-11
Granted: 1997-02-07
Abstract: Procedimento per il controllo automatico del ciclo di asciugatura in una macchina per l'asciugatura della biancheria fino al raggiungimento del grado di asciugatura desiderato, in grado di calcolare il tempo di asciugatura necessario elaborando un pluralità di temperature iniziali (t1, t2, tn) dell'aria utilizzata per asciugare detta biancheria e dei corispondenti tempi a partire dall'inizio del ciclo di asciugatura.Detto tempo di asciugatura previsto viene calcolato anche sulla base di una pluralità di serie storiche sperimentali precedenti in cui vengono considerate sia le diverse condizioni della macchina e del carico, sia il risultato di asciugatura ottenuto.Preferibilmente la temperatura di detta aria di detto contenitore viene rilevate quando l'aria è scaricata all'esterno di detto contenitore.
Patent IT-1265964-B1 (IT)
Title: Micro-granuli ottenuti tramite estrusione-sferonizzazione contenenti una ciclodestrina.
Inventor: GIORDANO FERDINANDO
IPC: C05G5/30
Filed: 1994-05-20
Granted: 1996-12-16
Abstract: L'invenzione ha per oggetto dei micro - granuli ottenuti tramite estrusione - sferonizzazione comprendente almeno una ciclodestrina in quanto eccipiente. Essa ha ugualmente per oggetto il procedimento di preparazione di questi micro - granuli tramite estrusione - sferonizzazione, così come l'utilizzazione di una ciclodestrina in quanto eccipiente per la fabricazione di micro - granuli tramite estrusione - sferonizzazione, questi micro - granulari permettendo la liberazione controllata dei principi attivi farmaceutici, per la sanità animale o agrochimica.
Patent IT-1286112-B1 (IT)
Title: Ergonomic seat for strenuous driving conditions
Inventor: DAL MONTE ANTONIO
IPC: B60N/
Filed: 1996-06-19
Granted: 1998-07-07
Abstract: The invention refers to an innovative seat designed to alleviate fatigue and improve safety during strenuous driving conditions. The seat comes with a suspension device based on a system of levers so as to allow a controlled oscillation of the cushion simultaneous with an unchanged angular position of the seat back and an unchanged spacing between the front part of the cushion and the floor/pedals. <IMAGE>
Patent IT-1310721-B1 (IT)
Inventor: SASSONE LUIGI
IPC: D06F39/08
Filed: 1999-09-15
Granted: 2002-02-22
Abstract: A sensor is described for a hydraulic device of a household appliances, in particular a washing machine, which hydraulic device (1') comprises at least a body (2), wherein a space (3) is defined to flow and/or contain a liquid, and at least a housing (6) in said body (2), for securing to the latter at least a control element (4) for the flow and/or containment of said liquid, said housing (6) defining a seat (6B) for positioning and/or fastening at least a part (4B) of said control element (4) to said body (2); according to the invention, said sensor (20) comprises at least a component defining coupling means capable of cooperating with said seat (6B), for allowing to position and/or fasten said sensor (20) on said housing (6), alternatively to said part (4B) of said control element (4). <IMAGE>
Patent IT-1311347-B1 (IT)
Inventor: GUALA GIANNI
IPC: A61M39/24
Filed: 1999-11-12
Granted: 2002-03-12
Abstract: A check valve (6) for medical infusion lines and the like, including a diaphragm (8) made of elastically deformable material inserted between an upstream passageway (4) and a downstream passageway (5) and cooperating with an annular valve seat (14) to keep the check valve (6) normally closed. The annular valve seat (14) is formed by a front surface of the first tubular element (2), and the diaphragm consists of the bottom wall (9) of a cup-shaped element (7) arranged coaxially with the upstream and downstream passageways (4, 5) <IMAGE>
Patent JP-2978899-B1 (JP)
Title: セイロとセイロ載置台との組合わせ構造
IPC: F26B15/14
Filed: 1998-08-06
Granted: 1999-11-15
Abstract: 【要約】
【課題】  天日により乾燥させる食品をならべるための 作業の軽減、および、セイロ載置台を一定面積の領域に 効率良く配置することのできるセイロ載置台を提供す る。
【解決手段】  セイロ載置台２は、所定の間隔を隔てて 配置される１対の脚部３、４を有している。この１対の 脚部３、４の上端部分には、下部側板８ａ、上部側板８ ｂおよび支持板９を用いてガイドローラ１０が固定され ている。１対の脚部３、４の下方には、補助フレーム ５、６がそれぞれガセットプレート７を用いて固定され ている。
Patent JP-3002825-B1 (JP)
Title: 水栓器具
IPC: E03C1/02
Filed: 1998-08-24
Granted: 2000-01-24
Abstract: 【要約】
【課題】  本発明は、壁、床等の外装部材からの突出量 を少なくすることで、室内空間の有効活用を図ることが できる水栓器具を提供することを課題とする。
【解決手段】  本発明に係る水栓器具は、外装部材２０ 裏面側の水道配管１０が接続される水栓胴体１に、水道 配管１０からの水を吐出する吐出口４と、該吐出口４の 吐出水量を調整するハンドル５とが設けられてなる水栓 器具において、前記水栓胴体１が、前記ハンドル５を外 装部材２０表面側に臨出させて、外装部材２０裏面側に 固定されてなることを特徴とする。
Patent JP-2942554-B1 (JP)
Title: 流体旋回調整機構とこれを利用した洗浄混合装置
IPC: A23N12/02
Filed: 1998-08-25
Granted: 1999-08-30
Abstract: 【要約】
【目的】従来、流体の旋回作動は異種流体の混合や噴流 の破砕衝撃力の強化など様々な分野に利用されている が、旋回による渦流が流体の推進力を増加させるため、 流体が直線的に排出口に至る構造となっいた。そのた め、流体の旋回作動については、旋回過程における渦流 の衝撃力を積極的に利用することが困難であったので流 体の旋回作動を調整操作して旋回過程における渦流の衝 撃力を洗浄や混合に利用する装置の提供を目的とする。
【構成】側壁に回流角度をもって形成された流体噴出口 ３、底部に排出口４を設けた円筒もしくは多角柱形状の 回流槽の一側に、所定の角度をもって槽内に下降する所 定幅の回流調整体５を回流槽内に突出させるように構成 した。
Patent MD-2084-B1 (MD)
Title: Method of cognac quality assessment
Inventor: BAEV OLEG
IPC: G01N33/14
Filed: 2001-07-19
Abstract: The invention relates to the wine and cognac industry, namely to the assessment of cognac quality. The method of cognac quality assessment includes the qualitative and organoleptic analysis thereof according to the known method, additional determination of the "enanthic ether" main components: ethyl caprilate, ethyl caprinate, ethyl laurinate, oxidation degree of the tannic substances by the presence of pyrogallic hydroxyls, b-phenyl-ethyl alcohol, radionuclides of Cs137, radionuclides of Sr90 and the component ratios: tannic substances/lignin, pyrogallic hydroxyls/tannic substances and, afterwards, in a universal system, calculation of the generalized quality index ,<CHFORM>wherein D1 is the index of physicochemical composition of the cognacs, including the degree of influence of each index upon their quality, the admissible limits of concentrations, D2 - the quality index, including the organoleptic evaluation of the cognacs, the points being expressed in a ten-point system, recalculated in the universal measurement system, D3 - the index of typical nature of the cognacs, D4 - the degree of toxicity and ecological purity.Claims: 1
Patent MD-4384-B1 (MD)
Title: Host cell and method for the recombinant expression of a soluble interferon
Inventor: SCHILLING RALF
IPC: C12N9/02
Filed: 2012-05-21
Abstract: The invention relates to biotechnology, particularly to a host cell and a method for the recombinant expression of a soluble interferon.According to the invention, a host cell for recombinant expression of a mammalian interferon protein is claimed, said cell comprising: (a) a functional endogenous trxB gene and (b) an inactivated endogenous gor gene, the invention further relates to the use of such host cells for the recombinant expression of an interferon protein and to a method for the recombinant expression of a soluble interferon in a host cell.
Patent MD-4493-B1 (MD)
Title: Use of tris(thiosemicarbazide)cobalt(III) chloride as an inhibitor of steel corrosion in water
Inventor: PARŞUTIN VLADIMIR
IPC: C23F11/16
Filed: 2016-10-19
Abstract: The invention relates to the field of metal protection from corrosion in water and can be used to inhibit corrosion in closed systems of steel pipelines.Use of the coordinative compound of cobalt with a hydrazine derivative - tris(thiosemicarbazide)cobalt(III) trihydrate chloride of formula [Co(thios)3]Cl3·3H2O, where thios is thiosemicarbazide (H2N-C(= S)-NH-NH2) is proposed as an inhibitor of steel corrosion in water, at a concentration of 0.05…0.75 g/L.The technical result of the proposed solution is a significant reduction, in comparison with the use of thiosemicarbazide, of corrosion losses and an increase in the service life of steel pipelines.
Patent NO-335298-B1 (NO)
Inventor: JUNG PATRICE JOËL LOUIS
IPC: F16L11/08
Filed: 2001-11-21
Abstract: A flexible metal tube with closed section and a flexible pipe comprising such a metal tube, comprising a strip with substantially constant thickness and wound helically around an axis, the strip includes at least a closed section having walls formed by portions of a common turn of the strip, the closed section includes an upper wall and a lower wall and the section is arranged at one end of said strip while the other end terminates in a free edge. The closed section is trapezoidal in cross-section. A bulge radially oriented towards the upper wall of the closed section is provided between the closed section and the free edge of the stirrup. The invention is in particular applicable to flexible tubular pipes.
Patent NO-324810-B1 (NO)
Title: Fremgangsmate for a overlevere en klient fra et forste tradlost LAN til et andre tradlost LAN
Inventor: JOHANNESEN TOR HJALMAR
IPC: H04L/
Filed: 2005-06-06
Abstract: En fremgangsmåte og arrangement for handover mellom WLAN er beskrevet. Ved å åpne trafikkanalen (porten) mens autentiseringen prosesseres i parallell, kan handover-forsinkelser minimaliseres. Trafikkanalen/aksessporten vil først bli lukket hvis autentiseringsprosessen mislykkes.
Patent NO-335704-B1 (NO)
Title: Hurtigtest og kitt for diagnose av Alzheimers sykdom.
Inventor: ARENDT THOMAS
IPC: G01N33/68
Filed: 2006-04-20
Abstract: Den foreliggende oppfinnelsen vedrører en fremgangsmåte for diagnostisering av Alzheimers sykdom, eller et tidlig stadium derav, eller predisponering for sykdommen. Fremgangsmåten er basert på kvanti fikasjon av mitogensk uttrykkbare overflatemarkører, fortrinnsvis CD69, og tilhørende periferisk tilgjengelige celler, for eksempel hudceller eller lymfocytter, (a) før og (b) etter mitogen stimulering. En spesiell stimuleringsindeks a b er et tegn på Alzheimers sykdom eller et tidlig stadium derav, eller predisponering for sykdommen. Den foreliggende oppfinnelsen vedrører også kitt passende for å utføre den diagnostiske fremgangsmåten i følge oppfinnelsen.
Patent NO-342809-B1 (NO)
Title: Ventiltre med innvendig plassert strømningsmåler
Inventor: ZOLLO DAVID
IPC: E21B43/38
Filed: 2009-10-23
Abstract: En målerinnretning er beskrevet, hvilken målerinnretning inkluderer en konstruksjon beregnet på å være fjernbart koplet til et ventiltre, en hylse som er operativt koplet til konstruksjonen og en strømningsmåler plassert i det minste delvis inne i hylsen.
Patent NO-332129-B1 (NO)
Title: Anordning for handtering og oppbevaring av fibertrosser eller liner av kunststoffmateriale
Inventor: NAKKEN BORGE
IPC: B63B21/04
Filed: 2010-01-08
Abstract: Anordning for håndtering og oppbevaring av fibertrosser og fortøyningsliner, særlig til anvendelse i forbindelse med flytende offshoreinstallasjoner, der anordningen er innrettet for mottak til, lagring om bord i og avlevering fira skip (2), der det under skipets dekk (2') er anbrakt minst én trosseoppbevaringstank eller rom (3) for innmatning, kveiling og lagring av trossen (1) i suksessive lag i tanken, og for utmatning av trossen (1) fra tanken (3). Anordningen er beregnet til eventuelt å samvirke med minst én vinsjetrommel (6;7) eller annen trekkanordning.
Patent NO-335404-B1 (NO)
Title: Væskefylt, roterende enhet
Inventor: NORUM VIGGO LAURITZ
IPC: H02K7/08
Filed: 2013-03-06
Abstract: Oppfinnelsen tilveiebringer en væskefylt, hurtig roterende enhet, så som en motor, en mekanisk eller magnetisk kobling, som er kjennetegnet ved at den væskefylte enheten innbefatter minst en roterende kappe anordnet mellom overflater med forskjellig rotasjonshastighet.
Patent PL-110219-B1 (PL)
Title: Generator having a diode for safeguarding said generator against polarization change as well as a voltage controller
IPC: H02J7/24
Filed: 1977-03-09
Abstract: A multi-phase generator has a separately excited shunt field which is controlled by a voltage regulator. A free-wheeling diode is connected in parallel with the field. The voltage regulator is included in a single, hermetically sealed housing which has a metal base plate forming one terminal of the voltage regulator; two insulated terminals project from the voltage regulator and are sealed, in insulated relation, through the housing, preferably the base plate. Three monolithic semi-conductor integrated circuit (IC) chips are located within the sealed housing, two of them soldered to the base plate so that one of the semi-conductor connections of the chip are directly connected to the base plate, the connection being for the collector of the power transistor and the anode of the free-wheeling diode, the control portion of the voltage regulator being secured to a ceramic plate which is attached to the base plate, other terminals from the voltage regulator are being effected internally, by bonding wires, and to the two externally excessible contacts, so that the entire assembly is simple, readily manufactured, and requires little assembly, labor and time for connection to an alternator structure.
Patent PL-143301-B1 (PL)
Title: Foundry mould making method
IPC: B22D29/00
Filed: 1984-07-01
Abstract: A process for producing a casting mould with chemically bound moulding material using a pattern is intended to make it possible to forego the use of clay-bound sand, in particular for the mass production of cast members, and to provide a casting mould of adequate gas permeability, which is simple to produce, with a low level of consumption of moulding material, and inexpensive, and which also provides a high level of casting quality wth a low degree of environmental pollution. For that purpose, the moulding material which has become pourable or fluid due to the operation of casting a cast member is removed from a first casting mould comprising a single moulding material, whereas the remaining portion of the moulding material is left, and the hollow space formed when the pattern is re-fitted is filled with moulding material. In addition, the moulding material which has been reduced in strength may be also removed, being for example blown or brushed out.
Patent PL-155243-B1 (PL)
Title: Method of making a product from ceramic composite material modifed by means of a metal containing additive
IPC: C04B35/65
Filed: 1987-08-04
Abstract: A method of producing self-supporting ceramic bodies (10) having a modified metal-containing component includes first providing a self-supporting ceramic body (10) comprising (i) a polycrystalline oxidation reaction product (12) formed upon oxidation of a molten parent metal precursor with an oxidant, and (ii) an interconnected metal-containing component (14) at least partially accessible from one or more surfaces (15) of said ceramic body (10). The surface or surfaces (15) of the ceramic body (10) is contacted with a quantity of foreign metal different from said interconnected metal-containing component (14) at a temperature and for a time sufficient to allow for interdiffusion, whereby at least a portion of said metal-containing component (14) is displaced by said foreign metal. The resulting ceramic body, having an altered metal-containing component, exhibits modified or improved properties.
Patent PL-169504-B1 (PL)
Title: Disk for recording information signals and device for such disk
Inventor: MUAKAWA HIROSHI
IPC: G11B7/24
Filed: 1992-02-12
Abstract: A recording disc (d) for information signals includes a disc substrate (1) carrying a signal recording section (1a) on at least one of the surfaces, a positioning reference plane (4a) at a central region of one of the surfaces of the disc substrate (1), and an upright wall portion (4) integrally connecting the reference plane (4a) to the signal recording section (1a). A chucking device for chucking the recording disc to a disc rotating unit includes a disc table (103) having a disc setting portion (103a) and integrally mounted on a rotating shaft (102a) of a spindle motor (102), a centring member (104) reciprocably mounted on the disc table (103) and to abut an inner surface of the reference plane (4a) of the recording disc (d) to centre the recording disc, and a magnet (105) mounted at the foremost part of the disc setting unit inwardly of the centring member (104) and to attract a magnetic plate (2) provided on the recording disc (d) set on the disc table (103). <IMAGE>
Patent PL-169705-B1 (PL)
Inventor: OSMAN HENRYK
IPC: B21B13/02
Filed: 1992-03-04
Abstract: Klatka walcownicza do nawrotnego walcowania
metali typu duo, znamienna tym, że
posiada trzy stojaki (2) i (3), w których umieszczone
są wjednej płaszczyźnie poziomej pary
walców (4, 5; 6, 7) w ten sposób, że stojak
środkowy (3)jest wspólny dla obu par walców.
Patent PL-168554-B1 (PL)
Inventor: WOJTON STANISLAW
IPC: F24H1/36
Filed: 1992-06-09
Abstract: 1. Kocioł wodny centralnego ogrzewania
(57) opalany paliwem gazowym lub ciekłym, znamienny
tym, że blok wodny (1) złożony jest z
komór wodnych (2), które u dołu połączone są
z kolektorem dolnym (3) a u góry kolektorem
górnym (4), przy czym komory wodne (2) usytuowane
są pionowo i równolegle względem
siebie z zachowaniem stałej podziałki tak, że
tworzą szczeliny (10) kanału spalinowego.
Patent PL-169871-B1 (PL)
Inventor: LATUSZEK ANTONI
IPC: B01F11/02
Filed: 1993-02-12
Abstract: 1. Mieszalnik ultradźwiękowy, zawierający
przetwornik piezoelektryczny zasilany
generatorem drgań elektrycznych, znamienny
tym, że posiada puszkę (4) zawierającą gęstą
ciecz (5) i stykającą się z cieczą (3) zawartą w
okrągłym, otwartym naczyniu cylindrycznym
(1), wypełnionym cieczą nietłumiącą fal
ultradźwiękowych.
Patent PL-169507-B1 (PL)
Inventor: KWIATKOWSKI ZBIGNIEW
IPC: F28D1/02
Filed: 1993-05-10
Abstract: 1 Stabilizator lepkości cieczy, zawierający trapezokształtny
" w przekroju poprzecznym płaszcz zewnętrzny, przyłączony wraz z
licznymi mieszczącymi się wewnątrz niego komorami do bieguna
zerowego instalacji elektrycznej, a wewnątrz każdej z licznych komór
zawierający płytowe elektrody umocowane do płaszcza zewnętrznego
poprzez górne i dolne elementy elektroizolacyjne przyłączone w jednym
miejscu do źródła napięcia zasilającego, znamienny tym, że
zawiera usytuowane wewnątrz trapezokształtnej zamkniętej wanny
(1), sześć symetrycznych smukłych trapezokształtnych komór grzejnych
(2), usytuowanych każda w osi przepływu stabilizowanej co do
lepkości cieczy, której wlot (4) znajduje się w dolnej części wanny (1)
a wylot (5) znajduje się w górnej części wanny (1), natomiast umieszczone
wewnątrz w osi każdej z komór (2) płytowe elektrody czynne
(3), są odpowiednio bliźniaczymi parami, pierwsza I-druga II, trzecia
III-czwarta IV, oraz piąta V-szósta VI, przyłączone poprzez indywidualne
regulatory i punkty pomiarowe temperatury (6) do odrębnych
źródeł napięcia zasilającego, regulowanego co do wielkości, zwłaszcza
biegunów napięcia trójfazowego R, S, T, a same komory (2) mają
każda z osobna kształt w przekroju poprzecznym wysmukłego trapezu
regularnego, którego mniejsza podstawa znajduje się w najniższym
punkcie komory, a największa podstawa w najwyższym punkcie
komory i których kąt pochyleniaα nierównoległych do siebie ścianek
jest według potrzeb zmienny
Patent PL-171658-B1 (PL)
Inventor: FENINI FEDERICO
IPC: B65D85/60
Filed: 1993-10-27
Abstract: Opakowanie ze szczelną okładką
mającą wzdłużny zgrzew zamykający, zgięty
płasko na okładkę wzdłuż linn zgięcia i zawierające
element rozrywający typu taśma
lub nić rozłożony w kształcie pętli pod powierzchnią
okładki poprzecznie do zgrzewu,
znamienne tym, ze okładka (1) i zgrzew (2)
posiada, przy linii zgięcia (16) dwa nacięcia
(8,9) poprzeczne do linii zgięcia (16) i lezące
wzdłuż, po obu stronach elementu rozrywającego
(5).
Patent PL-174257-B1 (PL)
Title: Method of obtaining etylbenzene
Inventor: DEMAY CLAUDE
IPC: C07B61/00
Filed: 1993-03-30
Abstract: This method makes the benzene-bearing ingredient (A) and ethylene-bearing ingredient (B) implement the alkylating reaction from which an alkylide can be obtained and in the alkylide the formation of polyphenylethane can be promoted, and then makes the alkylide at least pass through one procedure of distillation and rectification so as to obtain a distillate diethyl-benzene riched and triethyl-bezene, and finally uses benzene to make the distillate implement alkyl transfer to make it richly contain ethyl benzene.
Patent PL-169183-B1 (PL)
Inventor: SIKORSKI RYSZARD T
IPC: C07D491/052
Filed: 1991-09-13
Abstract: Sposób wytwarzania nowego bis-maleimidu
5) rezolu fenolowego, o wzorze przedstawionym na
rysunku, znamienny tym, że 100 g adduktu maleinowego
rezolu fenolowego rozpuszcza się w 5 do
500 dcm3 dimetyloformamidu, następnie dodajesię
od 5 do 150 dcm3 roztworu amoniaku o stężeniu od
5 do 40% wagowych i mieszaninę reakcyjną miesza
się od 1 do 5 godzin w temperaturze od 275 do 355
K, po czym zobojętnia roztworem kwasu solnego i
oddziela wytrącony osad, który przemywa się
zdemineralizowaną wodą aż do uzyskania przesączu
o pH = 7, suszy w temperaturze 380 K i następnie
100 g tak otrzymanego adduktu kwasu
dimalonowego wprowadza się od 10 do 1000 g bezwodnika
octowego oraz od 0,1 do 100 g bezwodnego
octanu sodu, po czym ogrzewa w temperaturze
od 298 do 373 K w czasie od 0,5 do 15 godzin,
następnie mieszaninę reakcyjną ochładza się do
temperatury pokojowej i wylewa do 1 - 201 zimnej,
zdemineralizowanej wody, odsącza osad, który
przemywa się wodą i suszy w temperaturze od 293
do 383 K.
Patent PL-183398-B1 (PL)
Title: Pharmaceutical solutions free of organic salts for nasal administration
Inventor: VERONESI PAOLO A
IPC: G01N30/72
Filed: 1996-02-07
Abstract: The subject-matter of the invention are pharmaceutical non inorganic saline solutions for endonasal administration containing     a) a calcitonin, preferably salmon, as acetate salt,  characterized in that it further contains the organic excipients     b) N-(methyl)-glucamine,   c) tromethamine,   d) citric acid and   e) polyvinylpyrrolidone ranging from K15 to K120.   These are odourless and tasteless and thus have improved patient's compliance not having the undesirable secondary effects of known compositions as well as permit a complete and accurate analysis of the active principle and develop less degradation products during storage.
Patent PL-177308-B1 (PL)
Title: Apparatus for suspensing ventilation ducts
Inventor: GEBHARDT MANFRED
IPC: F16L3/24
Filed: 1995-06-13
Abstract: A device for securing air ducts consisting of individual joined sections, in which the joint planes of the sections have edge sections allowing them to be screwed together, the edge sections being angled on the outer edge. The purpose of the invention is to provide a securing device which is easy to fit and by means of which the suspension means can be considerably shortened, thus saving material. This is achieved in that the body of the device (1) takes the form of a section with pairs of engagement projections (6) in the central longitudinal plane which engaged in the fitted position with the angled sections of two adjacent edge sections of the duct sections and with at least one drilling (11) through which securing means like threaded rods (10) or the like can be passed.