EP0338573B1 - Security container for dangerous and/or precious chemical products - Google Patents

Security container for dangerous and/or precious chemical products Download PDF

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Publication number
EP0338573B1
EP0338573B1 EP89107195A EP89107195A EP0338573B1 EP 0338573 B1 EP0338573 B1 EP 0338573B1 EP 89107195 A EP89107195 A EP 89107195A EP 89107195 A EP89107195 A EP 89107195A EP 0338573 B1 EP0338573 B1 EP 0338573B1
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EP
European Patent Office
Prior art keywords
container
struts
pallet
safety container
safety
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 - Lifetime
Application number
EP89107195A
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German (de)
French (fr)
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EP0338573A1 (en
Inventor
Dieter Partschefeld
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.)
Buedenbender Bernd
Original Assignee
Buedenbender Bernd
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 Buedenbender Bernd filed Critical Buedenbender Bernd
Publication of EP0338573A1 publication Critical patent/EP0338573A1/en
Application granted granted Critical
Publication of EP0338573B1 publication Critical patent/EP0338573B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/02—Large containers rigid
    • B65D88/12—Large containers rigid specially adapted for transport
    • B65D88/128—Large containers rigid specially adapted for transport tank containers, i.e. containers provided with supporting devices for handling

Definitions

  • the invention relates to a security container according to the preamble of claim 1.
  • EP-A-0 178 136 uses an essentially cuboid-shaped, thick-walled container, the vertical edges of which are surrounded by vertical struts which are connected to one another in several height ranges by horizontal struts, which in turn are connected to one another in a rust-like manner by vertical rungs, and of which Both the horizontal struts and the vertical rungs for stiffening the container walls are connected to them by welds.
  • a necessary reinforcement and stiffening of the flat container walls is to be achieved, but a construction which is both labor-intensive and requires considerable amounts of material is achieved, in which the welding of practically all parts to one another means that replacement of individual components which is later necessary or desirable is hardly possible or is extremely difficult to carry out.
  • the construction is also used as a container over essential parts of its floor plan, the required use of material requires an excessive empty weight.
  • the invention is therefore based on the task of creating powerful, heavy-duty and reliable containers that are both easy to manufacture and operate, and. are characterized by favorable stacking and transport properties as well as by high resilience due to accelerations occurring during transport, easy replacement of defective parts and a low unladen weight.
  • FIGS. 1-5 A preferred embodiment of the security container is shown in FIGS. 1-5.
  • a pallet 26 is provided for receiving the container 1, which is connected in its four corner regions to vertically positioned struts 2.
  • a stable structure is achieved in that the lower ends of the struts are welded to screw plates 14, which in turn are screwed tightly to base plates 15 of the pallet 26.
  • the free upper ends of two struts 2 are connected to one another by cross members 8, and the connections are stiffened by corner plates 21 which have cutouts for the engagement of lifting devices.
  • the crossbeams are provided with stacking mandrels 5 which are able to engage in corresponding recesses in twistlock holding plates 17 of the pallets (26), so that extensive stackability is ensured.
  • An essentially cylindrical container 1 is used, which is closed at the bottom by a bottom 22 in the manner of the bobbin bottom and has a cone 6 at the upper end, which is closed by a releasable cover 23.
  • the upper part 7, which can be closed by the cover 23, can also be designed in the manner of the lace, as shown in the half section of FIG. 2 shown on the left.
  • the container 1 is connected, preferably welded, on its jacket in struts 2 opposite areas with claws 3, which in turn are connected to the struts 2 and thus on the one hand give the container a secure, firm hold and on the other hand further stiffen the construction of the struts.
  • the claws are conveniently screwed to the struts.
  • the claws are fixed by stops 4 provided on the struts, which bring about further stabilization, for example, against twisting during transport.
  • the container 1 is equipped with a fitting 19 for emptying.
  • heating plate 10 In accordance with the shape of the base 22 and to guide it against this base only when necessary.
  • the creation of a heating plate 10 is simplified when the pallet with rails 16 out is equipped, by means of which a lifting device can be inserted, expediently from the side opposite the emptying valve. The lifting device is retracted with the heating plate in place, but in the not yet extended position, and after positioning the heating plate below the floor 22, the lifting device 13 is extended until the heating plate is pressed against the floor, for example by means of the protective ring 9 and the receiving piece 11 .
  • FIGS. 6 to 8 show upper pallet belts 12 with applied base plates 15 for receiving the struts 2.
  • the lower pallet belts 18, like the upper belts, are also made from square tubes.
  • Connection plates 20 are used for anchoring and receiving positive connection means. Adequate space between the lower pallet belts 18 and the connecting plates 20 results in the possibility of moving under the pallet 26 by means of lifting forks, for example by forklifts or other means of transport.
  • the openings in the corner plates 21 allow handling by means of conventional hoists. This creates a stable and durable container that holds its contents safely, and which is securely held by the pallet and the outer frame formed by struts 2 in connection with cross members 8 and is largely covered against external stresses. By firmly connecting the struts 2 to the container 1, there is an advantageous mutual stiffening.
  • the struts are provided with brackets 24 into which ladders or operating platforms equipped with ladders or steps can be suspended for the cover 23 in such a way that lateral stresses on the struts are absorbed by the cross members 8.
  • FIG 5 is still A protective ring 9 overlapping the container bottom is shown, which additionally stiffens the bottom 22 of the container 1 and at the same time can protect the electrically heated heating plate 10 against overflowing product with a drip edge and serves as a vertical guide for the heating plate 10 which can be raised by means of a scissor lift 25.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pallets (AREA)

Description

Die Erfindung betrifft einen Sicherheits-Behälter nach der Gattung des Patentanspruches 1.The invention relates to a security container according to the preamble of claim 1.

Bekannte derartige Behälter unterliegen Transportbeschränkungen, sind nicht sicher stapelbar, und ihre Herstellung erweist sich durch empfindliche und schwer dicht zu haltende, meist quaderförmige Behälter als schwierig. Der Gegenstand nach der EP-A-0 178 136 benutzt einen im wesentlichen quaderförmig gestalteten, starkwandigen Behälter, dessen Vertikalkanten von Vertikalstreben umgeben sind, die in mehreren Höhenbereichen durch Horizontalstreben miteinander verbunden sind, die ihrerseits rostartig durch Vertikalsprossen miteinander verbunden sind, und von denen sowohl die Horizontalstreben als auch die Vertikalsprossen zur Aussteifung der Behälterwandungen mit diesen durch Schweißnähte verbunden sind. Damit soll zwar eine notwendige Verstärkung und Versteifung der ebenen Behälterwandungen erreicht werden, es wird aber eine sowohl arbeitsmäßig aufwendige als erhebliche Materialmengen erforderliche Konstruktion erreicht, bei der durch die Verschweißung praktisch aller Teile miteinander auch ein später erforderlich oder wünschenswert werdender Austausch einzelner Bauelemente kaum möglich oder nur äußerst schwierig durchführbar ist. Zwar wird die Konstruktion über wesentliche Teile ihres Grundrisses auch als Behälter genutzt, der erforderliche Materialeinsatz bedingt aber ein überhohes Leergewicht.Known containers of this type are subject to transport restrictions, are not securely stackable, and their manufacture proves to be difficult due to the use of sensitive, usually cuboid-shaped containers that are difficult to keep tight. The object according to EP-A-0 178 136 uses an essentially cuboid-shaped, thick-walled container, the vertical edges of which are surrounded by vertical struts which are connected to one another in several height ranges by horizontal struts, which in turn are connected to one another in a rust-like manner by vertical rungs, and of which Both the horizontal struts and the vertical rungs for stiffening the container walls are connected to them by welds. A necessary reinforcement and stiffening of the flat container walls is to be achieved, but a construction which is both labor-intensive and requires considerable amounts of material is achieved, in which the welding of practically all parts to one another means that replacement of individual components which is later necessary or desirable is hardly possible or is extremely difficult to carry out. Although the construction is also used as a container over essential parts of its floor plan, the required use of material requires an excessive empty weight.

Die Erfindung geht daher von der Aufgabe aus, leistungsfähige, hochbelastbare und verläßliche Behälter zu schaffen, die sowohl leicht herstellbar als auch bedienbar sind, und die. sich durch günstige Stapel- und Transporteigenschaften ebenso auszeichnen wie durch hohe Belastbarkeit durch während des Transportes auftretende Beschleunigungen, leichte Austauschbarkeit defekter Teile und ein geringes Leergewicht.The invention is therefore based on the task of creating powerful, heavy-duty and reliable containers that are both easy to manufacture and operate, and. are characterized by favorable stacking and transport properties as well as by high resilience due to accelerations occurring during transport, easy replacement of defective parts and a low unladen weight.

Gelöst wird diese Aufgabe mit den kennzeichnenden Merkmalen des Patentanspruches 1, die einerseits eine Stapelbarkeit der mit Behälter ausgestatteten Palette sichern, andererseits aber auch den gewünschten mechanischen Schutz des vom Behälter eingenommenen Raumes gewähren, wobei für den Behälter selbst eine Form wählbar ist, die eine hohe Belastbarkeit desselben bei geringem Materialaufwand zuläßt.This object is achieved with the characterizing features of claim 1, which on the one hand ensure the stackability of the pallet equipped with containers, but on the other hand also provide the desired mechanical protection of the space occupied by the container, with a shape that can be selected for the container itself being high Resilience of the same allows with little material.

Zweckmäßige und vorteilhafte Weiterbildungen sind den Unteransprüchen zu entnehmen.Appropriate and advantageous developments can be found in the subclaims.

Im einzelnen ist die Erfindung anhand der Beschreibung von Ausführungsbeispielen in Verbindung mit diese darstellenden Zeichnungen erläutert. Es zeigen hierbei:

  • Fig. 1 die Ansicht eines Sicherheits-Behälters,
  • Fig. 2 die Seitenansicht des Sicherheits-Behälters nach Fig. 1,
  • Fig. 3 einen Horizontalschnitt entlang der Ebene III der Fig. 1,
  • Fig. 4 eine Bodenansicht des Sicherheitsbehälters nach Fig. 1,
  • Fig. 5 eine im Bereich V der Fig. 1 geschnittene Seitenansicht des Sicherheitsbehälters der Fig. 1,
  • Fig. 6 einen in zwei Ebenen geführten Schnitt der Palette des Sicherheits-Behälters,
  • Fig. 7 die teilweise aufgebrochene Aufsicht auf die Palette der Fig. 6 und
  • Fig. 8 die Seitenansicht der Palette der Fign. 6 und 7.
In detail, the invention is based on the description of exemplary embodiments in connection with these Drawings explained. They show:
  • 1 is a view of a security container,
  • 2 shows the side view of the safety container according to FIG. 1,
  • 3 shows a horizontal section along the plane III of FIG. 1,
  • 4 shows a bottom view of the security container according to FIG. 1,
  • 5 is a side view, cut in area V of FIG. 1, of the security container of FIG. 1,
  • 6 shows a cut of the pallet of the safety container, which is carried out in two planes,
  • Fig. 7 is the partially broken top view of the pallet of Fig. 6 and
  • 8 shows the side view of the palette of FIGS. 6 and 7.

Ein bevorzugtes Ausführungsbeispiel des Sicherheits-Behälters ist in den Fig. 1 - 5 dargestellt.A preferred embodiment of the security container is shown in FIGS. 1-5.

Zur Aufnahme des Behälters 1 ist eine Palette 26 vorgesehen, die in ihren vier Eckbereichen jeweils mit vertikal gestellten Streben 2 verbunden ist. Ein stabiler Aufbau wird erreicht, indem die unteren Enden der Streben mit Scckelplatten 14 verschweißt sind, die ihrerseits fest mit Basisplatten 15 der Palette 26 verschraubt sind. Die freien oberen Enden jeweils zweier Streben 2 sind durch Traversen 8 miteinander verbunden, und die Verbindungen sind durch Eckbleche 21 versteift, die Aussparungen zum Eingriff von Hebezeugen aufweisen. Zur Erzielung einer ausreichenden Stapelbarkeit sind die Traversen mit Stapeldornen 5 versehen, die in entsprechende Ausnehmungen von Twistlockhalteplatten 17 der Paletten (26) einzugreifen vermögen, so daß eine weitgehende Stapelbarkeit gesichert ist.A pallet 26 is provided for receiving the container 1, which is connected in its four corner regions to vertically positioned struts 2. A stable structure is achieved in that the lower ends of the struts are welded to screw plates 14, which in turn are screwed tightly to base plates 15 of the pallet 26. The free upper ends of two struts 2 are connected to one another by cross members 8, and the connections are stiffened by corner plates 21 which have cutouts for the engagement of lifting devices. To To achieve sufficient stackability, the crossbeams are provided with stacking mandrels 5 which are able to engage in corresponding recesses in twistlock holding plates 17 of the pallets (26), so that extensive stackability is ensured.

Verwendet wird ein im wesentlichen zylindrischer Behälter 1, der nach unten durch einen Boden 22 nach Art der Klöpperböden abgeschlossen ist und am oberen Ende einen Konus 6 aufweist, der durch einen lösbaren Deckel 23 verschlossen ist. Damit ergibt sich eine Behälterform, die sich auch bei Druckbeanspruchungen bzw. während des Transportes auftretenden Beschleunigungen günstig verhält und verläßlich herstellbar ist. Der durch den Deckel 23 schließbare Oberteil 7 läßt sich, wie im links dargestellten Halbschnitt der Fig. 2 gezeigt, ebenfalls nach Art der Klöpperböden gestalten.An essentially cylindrical container 1 is used, which is closed at the bottom by a bottom 22 in the manner of the bobbin bottom and has a cone 6 at the upper end, which is closed by a releasable cover 23. This results in a container shape which behaves favorably even under pressure loads or accelerations occurring during transport and can be produced reliably. The upper part 7, which can be closed by the cover 23, can also be designed in the manner of the lace, as shown in the half section of FIG. 2 shown on the left.

Der Behälter 1 ist an seinem Mantel jeweils in Streben 2 gegenüberliegenden Bereichen mit Pratzen 3 verbunden, vorzugsweise verschweißt, die ihrerseits mit den Streben 2 verbunden sind und damit einerseits dem Behälter sicheren, festen Halt verleihen und andererseits ihrerseits die Konstruktion der Streben weiterhin versteifen. Zweckmäßig sind die Pratzen mit den Streben verschraubt. Zusätzlich werden die Pratzen durch an den Streben vorgesehene Anschläge 4 fixiert, die eine weitere Stabilisierung beispielsweise gegen ein Verwinden während des Transportes bewirken. Zur Entleerung ist der Behälter 1 mit einer Armatur 19 ausgestattet.The container 1 is connected, preferably welded, on its jacket in struts 2 opposite areas with claws 3, which in turn are connected to the struts 2 and thus on the one hand give the container a secure, firm hold and on the other hand further stiffen the construction of the struts. The claws are conveniently screwed to the struts. In addition, the claws are fixed by stops 4 provided on the struts, which bring about further stabilization, for example, against twisting during transport. The container 1 is equipped with a fitting 19 for emptying.

Unter bestimmten Bedingungen kann es sich als zweckmäßig erweisen, den Behälterinhalt zur Entnahme aufzuheizen. Es ist zwar möglich, Heizelemente ortsfest und ständig anzuordnen. Es hat sich jedoch bewährt, eine Heizplatte 10 entsprechend der Form des Bodens 22 zu gestalten und erst im Bedarfsfalle gegen diesen Boden zu führen. Das Anlegen einer Heizplatte 10 wird vereinfacht, wenn die Palette mit Laufschienen 16 ausge stattet ist, mittels deren eine Hebevorrichtung einschiebbar ist, und zwar zweckmäßig von der der Entleerungsarmatur entgegengerichteten Seite. Die Hebevorrichtung wird mit aufgelegter Heizplatte, jedoch in noch nicht ausgefahrener Stellung, eingefahren, und nach Positionieren der Heizplatte unterhalb des Bodens 22 wird die Hebevorrichtung 13 ausgefahren, bis die Heizplatte, beispielsweise vermittels des Schutzringes 9 und des Aufnahmestückes 11, gegen den Boden gepreßt ist.Under certain conditions, it may prove useful to heat the contents of the container for removal. It is possible to arrange heating elements in a stationary and permanent manner. However, it has proven useful to design a heating plate 10 in accordance with the shape of the base 22 and to guide it against this base only when necessary. The creation of a heating plate 10 is simplified when the pallet with rails 16 out is equipped, by means of which a lifting device can be inserted, expediently from the side opposite the emptying valve. The lifting device is retracted with the heating plate in place, but in the not yet extended position, and after positioning the heating plate below the floor 22, the lifting device 13 is extended until the heating plate is pressed against the floor, for example by means of the protective ring 9 and the receiving piece 11 .

Die Palette selbst ist so geformt, daß sie leicht stapelbar ist, und daß sie leicht handhabbar ist. Die Figuren 6 bis 8 zeigen Paletten -Obergurte 12 mit aufgebrachten Basisplatten 15 zur Aufnahme der Streben 2. Auch die Paletten-Untergurte 18 sind, wie die Obergurte, aus Vierkantrohren gefertigt. Verbindungsbleche 20 dienen der Verankerung und der Aufnahme formschlüssiger Verbindungsmittel. Durch ausreichenden Raum zwischen den Palettenuntergurten 18 und den Verbindungsblechen 20 ergibt sich die Möglichkeit des Unterfahrens der Palette 26 vermittels von Hubgabeln bspw. von Gabelstaplern oder anderen Transportmitteln. Die Durchbrechungen der Eckbleche 21 gestatten die Handhabung vermittels üblicher Hebezeuge. Damit entsteht ein in sich stabiler und beanspruchungsfähiger Behälter, der seinen Inhalt sicher faßt, und der durch die Palette und das durch Streben 2 in Verbindung mit Traversen 8 gebildete Außengerüst sicher gehalten wird und weitgehend gegen äußere Beanspruchungen abgedeckt ist. Durch feste Verbindung der Streben 2 mit dem Behälter 1 ergibt sich eine vorteilhafte gegenseitige Versteifung.The pallet itself is shaped so that it is easily stackable and that it is easy to handle. FIGS. 6 to 8 show upper pallet belts 12 with applied base plates 15 for receiving the struts 2. The lower pallet belts 18, like the upper belts, are also made from square tubes. Connection plates 20 are used for anchoring and receiving positive connection means. Adequate space between the lower pallet belts 18 and the connecting plates 20 results in the possibility of moving under the pallet 26 by means of lifting forks, for example by forklifts or other means of transport. The openings in the corner plates 21 allow handling by means of conventional hoists. This creates a stable and durable container that holds its contents safely, and which is securely held by the pallet and the outer frame formed by struts 2 in connection with cross members 8 and is largely covered against external stresses. By firmly connecting the struts 2 to the container 1, there is an advantageous mutual stiffening.

Die Streben sind mit Halterungen 24 versehen, in die Leitern oder mit Leitern oder Stufen ausgestattete Bedienungsbünen für den Deckel 23 so einhängbar sind, daß seitliche Beanspruchungen der Streben von den Traversen 8 aufgenommen werden. In Figur 5 ist weiterhin ein den Behälterboden übergreifender Schutzring 9 dargestellt, der der den Boden 22 des Behälters 1 zusätzlich versteift und gleichzeitig mit einer Tropfkante die bspw. elektrisch beheizbare Heizplatte 10 gegen überfließendes Produkt zu schützen vermag sowie als Vertikalführung für die mittels eines Scherenhebers 25 anhebbare Heizplatte 10 dient.The struts are provided with brackets 24 into which ladders or operating platforms equipped with ladders or steps can be suspended for the cover 23 in such a way that lateral stresses on the struts are absorbed by the cross members 8. In Figure 5 is still A protective ring 9 overlapping the container bottom is shown, which additionally stiffens the bottom 22 of the container 1 and at the same time can protect the electrically heated heating plate 10 against overflowing product with a drip edge and serves as a vertical guide for the heating plate 10 which can be raised by means of a scissor lift 25.

Claims (10)

1. A safety container for dangerous and/or valuable chemical substances, especially in liquid form, the substances according to the danger they pose and/or face being contained during transport in a container (1) anchored firmly to a pallet (26), the pallet being connected to struts arranged vertically, one at each corner, with their end zones connected together by horizontal connecting elements (crossbars 8), and the jacket of the container (1) being connected to a least four claws which in turn may be connected to the struts (2),
characterized in that
the bottom ends of the struts (2) are welded to baseplates (14) which may be bolted to baseplates (15) on the pallet (26).
2. A safety container as in Claim 1,
characterized in that
the claws (5) are in addition secured to the struts (2) by stops (4).
3. A safety container as in Claim 1 or 2,
characterized in that
each pair of the struts (2) is connected together by a horizontal connecting element (crossbar 8).
4. A safety container as in one of the Claims 1 to 3,
characterized by
an essentially cylindrical container (1) exhibiting a domed lid (23) and a domed bottom (22).
5. A safety container as in one of the Claims 1 or 3,
characterized by
an essentially spherical container.
6. A safety container as in one of the Claims 1 or 5,
characterized in that
the struts (2) and/or the crossbars (8) are equipped with shaped supporting bodies (stacking spikes 5) and the pallets (26) with retainer-plates (17) which lie on the latter with a close fit.
7. A safety container as in one of the Claims 1 or 6,
characterized in that
the struts (12) are equipped with mountings (24) in which an operating platform equipped with a ladder or a ladder may be suspended between two struts (2) connected together by a crossbar (8).
8. A safety container as in of the Claims 1 or 7,
characterized by
a pallet (26) which exhibits gaps and/or recesses for receiving lifting-forks.
9. A safety container as in one of the Claims 1 or 7,
characterized by
a heater plate (10) which may be laid against the bottom (22) of the container (1).
10. A safety container as in Claim 9,
characterized in that
the pallet (26) exhibits two rails (16) by means of which the heater plate (10) may be run under the container bottom (22) and placed against the container bottom by means of a lifting device (13).
EP89107195A 1988-04-21 1989-04-21 Security container for dangerous and/or precious chemical products Expired - Lifetime EP0338573B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3813432 1988-04-21
DE3813432 1988-04-21

Publications (2)

Publication Number Publication Date
EP0338573A1 EP0338573A1 (en) 1989-10-25
EP0338573B1 true EP0338573B1 (en) 1992-06-17

Family

ID=6352564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107195A Expired - Lifetime EP0338573B1 (en) 1988-04-21 1989-04-21 Security container for dangerous and/or precious chemical products

Country Status (2)

Country Link
EP (1) EP0338573B1 (en)
DE (1) DE58901666D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9101853U1 (en) * 1991-02-18 1992-06-17 Westerwälder Eisenwerk Gerhard GmbH, 5241 Weitefeld Pressure-resistant pallet tank
US5653354A (en) * 1995-08-21 1997-08-05 Noslo Enterprises, Inc. Stackable container system for flowable materials
US5722552A (en) * 1995-08-21 1998-03-03 Noslo Enterprises, Inc. Collapsible stackable container system for flowable materials
DE202011050795U1 (en) 2011-07-22 2011-09-12 Holger Blum Container for liquid chemicals

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8425818D0 (en) * 1984-10-12 1984-11-21 Whitlam Holdings Ltd Pressure vessel

Also Published As

Publication number Publication date
EP0338573A1 (en) 1989-10-25
DE58901666D1 (en) 1992-07-23

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