CH683873A5 - Hydrants. - Google Patents
Hydrants. Download PDFInfo
- Publication number
- CH683873A5 CH683873A5 CH1896/91A CH189691A CH683873A5 CH 683873 A5 CH683873 A5 CH 683873A5 CH 1896/91 A CH1896/91 A CH 1896/91A CH 189691 A CH189691 A CH 189691A CH 683873 A5 CH683873 A5 CH 683873A5
- Authority
- CH
- Switzerland
- Prior art keywords
- connection
- nozzle
- welding flange
- flange
- piece
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
- B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
- B29C66/4742—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat said single elements being spouts
- B29C66/47421—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat said single elements being spouts said spouts comprising flanges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/82—Testing the joint
- B29C65/8207—Testing the joint by mechanical methods
- B29C65/8246—Pressure tests, e.g. hydrostatic pressure tests
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/342—Preventing air-inclusions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/027—Details with respect to the testing of elastic elements, e.g. gloves, condoms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2884—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for welds
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Examining Or Testing Airtightness (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
1 1
CH 683 873 A5 CH 683 873 A5
2 2nd
Beschreibung description
Die Erfindung bezieht sich auf einen Anschluss zur Prüfung der Dichtheit zweier thermoplastischer Folienbahnen, die mittels Flächenabschnitte um-schliessender Nähte aufeinandergeschweisst sind. The invention relates to a connection for checking the tightness of two thermoplastic film webs which are welded to one another by means of surface sections of surrounding seams.
Nähte zur Verbindung zweier Folienbahnen werden häufig bei Tunnelauskleidungen verwendet, wobei die Notwendigkeit der Prüfung auf Dichtheit der Naht, bzw. des zwischen den Nähten eingeschlossenen Raumes besteht. Seams for connecting two sheets of film are often used in tunnel linings, and there is a need to test for tightness of the seam or the space enclosed between the seams.
Bisher wurden die zum Anschluss einer Vakuumquelle erforderlichen Anschlussrohre direkt mit einer Folie verbunden, wobei sich aber häufig Probleme hinsichtlich der Dichtheit der an der Mantelfläche eines entsprechenden Rohres angepressten Folie ergaben. So far, the connecting pipes required to connect a vacuum source have been directly connected to a film, but problems have often arisen with regard to the tightness of the film pressed onto the outer surface of a corresponding pipe.
Ziel der Erfindung ist es, diese Nachteile zu vermeiden und einen Anschluss der eingangs erwähnten Art vorzuschlagen, der sich relativ leicht mit den Dichtungsbahnen verschweissen lässt und ein hohes Mass an Dichtheit gewährleistet. The aim of the invention is to avoid these disadvantages and to propose a connection of the type mentioned at the outset, which can be welded relatively easily to the sealing sheets and ensures a high degree of tightness.
Erfindungsgemäss wird dies durch die Merkmale im Anspruch 1 erreicht. Die Noppen sind vorzugsweise rasterförmig angeordnet. According to the invention this is achieved by the features in claim 1. The knobs are preferably arranged in a grid.
Auf diese Weise kann die obere Folie im Bereich der Doppelnaht einfach mit dem Stutzen verbunden werden, wodurch sich ein hohes Mass an Dichtheit bei der Verbindung der Folie mit dem Stutzen erreichen lässt. In this way, the upper film in the area of the double seam can easily be connected to the connector, which allows a high degree of tightness to be achieved when the film is connected to the connector.
Ausserdem ergibt sich auch der Vorteil, dass es bei einer Kontrolle der Dichtheit mit Unterdruck nicht zu einem Verschluss des Stutzens, bzw. seiner Öffnung durch die untere Folie kommen kann, da durch die Noppen bzw. Erhebungen ein entsprechender Abstand zwischen der Unterseite des Flansches und der Innenseite der unteren Folie sichergestellt ist, sodass zumindest Spalte freibleiben, durch die hindurch die Luft aus dem zwischen den einzelnen Nähten der Doppelnaht verbleibenden Raum abgesaugt werden kann. In addition, there is also the advantage that when the tightness is checked with negative pressure, the connection or its opening cannot be closed by the lower film, since the knobs or elevations provide a corresponding distance between the underside of the flange and the inside of the lower film is ensured, so that at least gaps remain, through which the air can be sucked out of the space remaining between the individual seams of the double seam.
Nach einem weiteren Merkmal der Erfindung kann vorgesehen sein, dass der Stutzen schlauchartig ausgebildet ist und an seinem freien Ende zur Verbindung mit einer Normtülle ausgebildet ist. According to a further feature of the invention, it can be provided that the connection piece is tubular and is designed at its free end for connection to a standard nozzle.
Durch diese Massnahmen ist ein einfacher Anschluss des Stutzens an einen mit der Vakuumquelle verbundenen Schlauch möglich. These measures make it easy to connect the nozzle to a hose connected to the vacuum source.
Bei einer bevorzugten Ausführungsform der Erfindung ist vorgesehen, dass der Stutzen von einem mit dem Schweissflansch verbundenen, vorzugsweise mit einem Gewinde versehenen Ring umgeben ist. In a preferred embodiment of the invention it is provided that the socket is surrounded by a ring which is connected to the welding flange and is preferably provided with a thread.
Auf diese Weise ist es möglich, den Stutzen bzw. den an diesem angeschlossenen Schlauch durch ein Schutzrohr zu führen, das auf das Gewinde des Ringes aufgeschraubt werden kann. Dies ermöglicht es z.B. während Betonierarbeiten den Schlauch gegen Beschädigungen sicher zu schützen. In this way it is possible to lead the nozzle or the hose connected to it through a protective tube which can be screwed onto the thread of the ring. This enables e.g. to protect the hose against damage during concreting work.
Als besonders vorteilhaft hat es sich erwiesen, wenn der Stutzen mit dem Schweissflansch und gegebenenfalls dem Ring einstückig ausgebildet, und vorzugsweise durch Spritzgiessen einer thermoplastischen Kunststoffmasse hergestellt ist. It has proven to be particularly advantageous if the connection piece is made in one piece with the welding flange and, if appropriate, the ring, and is preferably produced by injection molding a thermoplastic material.
Dadurch wird eine dichte Verbindung des Schweissflansches mit dem Stutzen und dem Ring auf einfachste Weise hergestellt. A tight connection of the welding flange with the connection piece and the ring is thereby produced in the simplest way.
Weiters kann vorgesehen sein, dass der Anschluss eine mittlere Shorehärte von 75 bis 90 aufweist. It can also be provided that the connection has an average Shore hardness of 75 to 90.
Bei diesen Werten der Härte ist der Stutzen einerseits flexibel genug um eine gute Verschweiss-barkeit mit der Folie sicherzustellen und andererseits hart genug, um eine ausreichende Formbeständigkeit zu gewährleisten. With these values of hardness, the nozzle is flexible enough to ensure good weldability with the film and hard enough to ensure sufficient dimensional stability.
Die Erfindung wird nun anhand der Zeichnung näher erläutert, die einen erfindungsgemässen Anschluss zeigt. The invention will now be explained in more detail with reference to the drawing, which shows a connection according to the invention.
Der erfindungsgemässe Anschluss weist einen Schweissflansch 1 auf, der mit der Innenseite der oberen Folie 2 verschweisst ist, die mit der unteren Folie 3 mittels einer nicht dargestellten Naht verbunden ist. Die Unterseite des Schweissflansches 1 ist mit Noppen 4 versehen, zwischen denen Durchlässe 5 ausgespart sind, durch die hindurch die Luft beim Evakuieren des Raumes 6 zwischen den dop-pellagigen Dichtungsbahnen hindurchströmen kann und die ein dichtes Verschliessen der Öffnung 7 des Stutzens 8, der mit dem Schweissflansch einstückig verbunden ist, verhindern. The connection according to the invention has a welding flange 1, which is welded to the inside of the upper film 2, which is connected to the lower film 3 by means of a seam, not shown. The underside of the welding flange 1 is provided with knobs 4, between which passages 5 are recessed, through which the air can flow when the space 6 is evacuated between the double-pellet sealing membranes and which tightly closes the opening 7 of the connecting piece 8, which with prevent the welding flange from being connected in one piece.
Der Stutzen 8 ist im Bereich seines freien Endes mit einer Abstufung 9 versehen, auf die eine nicht dargestellte Normtülle aufsteckbar ist, mit der ein zu einer Vakuumquelle führender, nicht dargestellter Schlauch an den Stutzen angeschlossen werden kann. The connector 8 is provided in the region of its free end with a gradation 9, onto which a standard nozzle, not shown, can be attached, with which a hose, not shown, leading to a vacuum source can be connected to the connector.
Der Stutzen 8 ist von einem mit dem Schweissflansch 1 ebenfalls einstückig verbundenen Ring 10 umgeben, der mit einem Gewinde 11 versehen ist, auf das ein Schutzrohr (nicht dargestellt) aufschraubbar ist, das den angeschlossenen Schlauch vor einer Beschädigung schützt. Dabei ist es auch möglich, während der Prüfung der Doppelnaht, bei der in dem Raum 6 zwischen den Folien 2,3 ein Unterdruck angelegt und das Ansteigen des Druckes bei abgeschalteter Vakuumquelle beobachtet wird, im Bereich der Naht Betonierungsarbeiten durchzuführen, da der Anschlussschlauch durch das erwähnte Schutzrohr gegen Beschädigungen gesichert ist. The connector 8 is surrounded by a ring 10, which is also connected in one piece to the welding flange 1 and is provided with a thread 11, onto which a protective tube (not shown) can be screwed, which protects the connected hose from damage. It is also possible to carry out concreting work in the area of the seam during the testing of the double seam, in which a vacuum is applied in the space 6 between the foils 2, 3 and the increase in pressure is observed when the vacuum source is switched off, since the connecting hose through the mentioned protective tube is secured against damage.
Der Anschluss ist zweckmässigerweise durch Spritzgiessen hergestellt, wobei ein Kunststoff verwendet wird, der sich gut mit der Folie 2 verschweissen lässt und im fertigen Zustand des Anschlusses eine Shorehärte zwischen 75 und 90 aufweist. The connection is expediently produced by injection molding, a plastic being used which can be easily welded to the film 2 and which has a Shore hardness between 75 and 90 in the finished state of the connection.
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0136690A AT399049B (en) | 1990-06-27 | 1990-06-27 | CONNECTING PIPE |
Publications (1)
Publication Number | Publication Date |
---|---|
CH683873A5 true CH683873A5 (en) | 1994-05-31 |
Family
ID=3512327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1896/91A CH683873A5 (en) | 1990-06-27 | 1991-06-26 | Hydrants. |
Country Status (4)
Country | Link |
---|---|
AT (1) | AT399049B (en) |
CH (1) | CH683873A5 (en) |
DE (1) | DE4120785C2 (en) |
FR (1) | FR2664020B1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29502219U1 (en) | 1995-02-11 | 1995-03-30 | Bastra Dipl.-Ing. Otten GmbH & Co., 45309 Essen | Mobile pressure tester for a pressurizable hollow body, in particular for a double weld seam forming a channel on overlapping welded plastic sealing sheets |
DE102010033114A1 (en) * | 2010-08-02 | 2012-02-02 | Siemens Aktiengesellschaft | Pipe joint has sealing surface that is provided for engaging to be bonded metal sheets that are arranged between two points in region of adhesive joint surface |
CN105004496A (en) * | 2015-08-19 | 2015-10-28 | 核工业理化工程研究院 | Device for detecting sealing of ultrasonically welded seam |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB779240A (en) * | 1953-03-24 | 1957-07-17 | Leopold Rado | Collapsible container and method for the production thereof |
GB853082A (en) * | 1957-12-13 | 1960-11-02 | Meyer Horst | Improvements in or relating to inflatable balls |
BE795542A (en) * | 1972-02-18 | 1973-06-18 | Dynamit Nobel Ag | METHOD AND DEVICE FOR CHECKING THE LEAKAGE OF THE WELDING CORDS OF PLASTIC STRIPS IN A VACUUM |
DE3201515A1 (en) * | 1982-01-20 | 1983-07-28 | Manfred 5210 Troisdorf Hawerkamp | "METHOD AND DEVICE FOR TESTING WELDED SEALED COMPONENTS MADE OF THERMOPLASTIC PLASTIC, ESPECIALLY WELDED PLASTIC TUBES AND PLASTIC CONTAINERS" |
AT372787B (en) * | 1982-03-17 | 1983-11-10 | Bauveg Bergbau Gmbh | METHOD FOR MEASURING THE TIGHTNESS OF MULTIPLE WELDING SEAMS |
EP0098322A1 (en) * | 1982-07-07 | 1984-01-18 | Bier-Drive Ag | Plastic bag |
US4733555A (en) * | 1987-04-13 | 1988-03-29 | Franks Stephen H | Pressure entry and test system |
-
1990
- 1990-06-27 AT AT0136690A patent/AT399049B/en not_active IP Right Cessation
-
1991
- 1991-06-24 DE DE4120785A patent/DE4120785C2/en not_active Expired - Fee Related
- 1991-06-26 CH CH1896/91A patent/CH683873A5/en not_active IP Right Cessation
- 1991-06-27 FR FR9107957A patent/FR2664020B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE4120785A1 (en) | 1992-01-02 |
FR2664020A1 (en) | 1992-01-03 |
ATA136690A (en) | 1994-07-15 |
AT399049B (en) | 1995-03-27 |
DE4120785C2 (en) | 2000-10-05 |
FR2664020B1 (en) | 1994-04-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NV | New agent |
Representative=s name: BUGNION S.A. |
|
PUE | Assignment |
Owner name: BAUVEG-SCHNELLER GESELLSCHAFT M.B.H. TRANSFER- BAU |
|
PL | Patent ceased |