EP0854336B2 - Process for turning small objects in a container and apparatus for carrying out this method - Google Patents

Process for turning small objects in a container and apparatus for carrying out this method Download PDF

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Publication number
EP0854336B2
EP0854336B2 EP98100096A EP98100096A EP0854336B2 EP 0854336 B2 EP0854336 B2 EP 0854336B2 EP 98100096 A EP98100096 A EP 98100096A EP 98100096 A EP98100096 A EP 98100096A EP 0854336 B2 EP0854336 B2 EP 0854336B2
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Prior art keywords
air
process container
support
closure elements
drying
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German (de)
French (fr)
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EP0854336A1 (en
EP0854336B1 (en
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Pharmatechnik Gmbh Atec
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Atec Pharmatechnik GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • F26B9/08—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers including agitating devices, e.g. pneumatic recirculation arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area

Definitions

  • the invention relates to a method for drying in a process container small objects, such as closure elements for pharmaceutical purposes (stopper), after a treatment of small objects as well as a device to carry out this method, in which the small objects an air permeable edition is arranged, the interior of the process container recycled preheated air is supplied and the small objects relative to the process container be rearranged by air so that a complete Drying takes place.
  • Closing elements for pharmaceutical Purposes such as plugs, will do so treated that they first in a washing phase by means of high purity, germ-free water.
  • the washing can be done with or without the addition of detergents respectively.
  • the process container is first with the Filled closure elements and it is added water.
  • the Closure elements supplied by the process container Compressed air moves.
  • the washing water is after the treatment process drained again. Possibly.
  • siliconization This is again hot, high purity water added, with the water dosed with silicone added becomes. Then the water is removed.
  • Sterilization using steam Sterilization using steam.
  • the process container move mechanically during the supply of warm air, to achieve that during the drying process the closure elements respectively opposite take different positions from their previous position so that the warm air also those areas can reach the closure elements, in the previous Position either against the inner wall of the process container or against others Plug systems (so-called turning).
  • This is disadvantageous that for the generation of a mechanical movement the process container consuming facilities required are. It also occurs due to the constant friction the closure elements against each other in drying processes an undesirable according to the prior art Particle abrasion. Furthermore occurs in particular at siliconized fastener elements during known drying process often the undesirable Phenomenon on that the closure elements stick together and thus clump together (so-called compacting).
  • Fluid bed dryers are also known, for example from K. Kröll: Dryer and Drying Process, Springer-Verlag 1959, p. 275 ff., In which Air constantly at such speed through one Layer of particles flows upwards that particles slightly raised and loosened, but not carried away become. All parts are permanently in Move. This allows free-flowing goods to which also plastics may belong, be dried. Another disadvantage here is that the particles due to of their movement often clash and thereby produce a considerable abrasion. Furthermore These fluidized bed dryers are not for particles suitable, which tend to clumping or compacting.
  • DE 42 11 485 C2 discloses a method for Removal of moisture from the inside of a Solid, for example, described from wood.
  • the Wood is first subjected to a high pressure, the liquid mechanically from the solid drives out and then one periodically rapidly changing pressure to the rest Remove moisture. Again, by the constant Pressure change the risk of heavy particle abrasion given.
  • the present invention has the object underlying a method and an apparatus for Implementation of this method of the aforementioned To create kind, with or with the as much as possible low technical complexity as complete as possible Drying of small objects achieved while doing Particle abrasion and compaction largely is avoided.
  • a device for carrying out the method is characterized by the features of claim 2.
  • the single figure shows a schematic representation a process vessel and a pressurized wind turbine with the appropriate line connections. The valves required for process control are not shown.
  • a designated 1 process container is for Treatment of closure elements for pharmaceutical Intended purpose.
  • the treatment has one Washing phase, optionally a siliconization phase, a subsequent Sterilization phase and a subsequent Drying phase on.
  • Subject of the The present invention is merely the drying phase.
  • the process container 1 has a designated 2, perforated support for the closure elements, z. B. plug (not shown).
  • the closure elements be in the process container 1 via a (not shown) Opening introduced.
  • the process container 1 is from a schematically illustrated terminal 3rd from over a pipe connection and a media pipe 4 high purity water (WFI, Water for Injection) supplied. Possibly. Be a terminal 5 detergents added.
  • WFI Water for Injection
  • compressed air is over a port 6 via a conduit 7 and the media tube 4 fed to the interior of the process container, whereby moves the closure elements in the water and thereby the washing process takes place.
  • the Compressed air escapes via an exhaust air connection 15. Nach Completion of the washing process, the water is over a Water drain 8 derived.
  • the container interior is again Supplied water, which silicone via a metering device 9 was added.
  • the Closure elements again by means of supplied compressed air emotional. After completion of the siliconizing process the water drained again.
  • a sterilization process For this purpose, the process container 1 from the top pure vapor supplied via a terminal 10. The Sterilization occurs at about 120 ° C for about 20 minutes at elevated pressure. After sterilization, the Process container brought back to atmospheric pressure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

In a process and apparatus for drying small articles in a process container, such as closure elements of pharmaceutical vessels after a treatment of the closure elements, an air-permeable support is arranged beneath the articles to support them and prepared preheated air is fed to the interior of the process container and through the support to dry the articles while they are resting on the support. An additional air mass flow is at least once briefly passed under the support during the drying operation, to lift and thereby turn the small articles to ensure at least substantially complete drying thereof.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Trocknen von in einem Prozeßbehälter befindlichen kleinen Gegenständen, wie Verschlußelementen für pharmazeutische Zwecke (Stopfen), nach einer Behandlung der kleinen Gegenstände sowie eine Vorrichtung zur Durchführung dieses Verfahrens, bei dem unter den kleinen Gegenständen eine luftdurchlässige Auflage angeordnet wird, dem Inneren des Prozeßbehälters aufbereitete vorgewärmte Luft zugeführt wird und die kleinen Gegenstände relativ zu dem Prozeßbehälter derart durch Luft umgelagert werden, daß eine vollständige Trocknung erfolgt.The invention relates to a method for drying in a process container small objects, such as closure elements for pharmaceutical purposes (stopper), after a treatment of small objects as well as a device to carry out this method, in which the small objects an air permeable edition is arranged, the interior of the process container recycled preheated air is supplied and the small objects relative to the process container be rearranged by air so that a complete Drying takes place.

Verschlußelemente für pharmazeutische Zwecke, beispielsweise Stopfen, werden dahingehend behandelt, daß sie in einer Waschphase zunächst mittels hochreinem, keimfreien Wasser gewaschen werden. Das Waschen kann mit oder ohne Zusatz von Detergentien erfolgen. Zur Einleitung der Waschphase wird der Prozeßbehälter zunächst mit den Verschlußelementen gefüllt und es wird Wasser zugegeben. Für den eigentlichen Waschvorgang werden die Verschlußelemente mittels dem Prozeßbehälter zugeführter Druckluft bewegt. Das Waschwasser wird nach dem Behandlungsvorgang wieder abgelassen. Ggf. schließt sich in einer zweiten Phase hieran ein Silikonisieren an. Hierzu wird erneut heißes, hochreines Wasser zugeführt, wobei das Wasser dosiert mit Silikon versetzt wird. Anschließend wird das Wasser entfernt. In einer sich daran anschließenden weiteren Phase erfolgt ein Sterilisieren unter Einsatz von Dampf.Closing elements for pharmaceutical Purposes, such as plugs, will do so treated that they first in a washing phase by means of high purity, germ-free water. The washing can be done with or without the addition of detergents respectively. To initiate the washing phase the process container is first with the Filled closure elements and it is added water. For the actual washing process, the Closure elements supplied by the process container Compressed air moves. The washing water is after the treatment process drained again. Possibly. In a second phase, this is followed by siliconization at. This is again hot, high purity water added, with the water dosed with silicone added becomes. Then the water is removed. In an ensuing further phase takes place Sterilization using steam.

Nach der Dampfsterilisation sind die Verschlußelemente feucht und müssen vor der Entnahme getrocknet werden. Ein hierfür verwendbarer, herkömmlicher Trockener ist aus DE 41 39 860 bekannt. Damit keine Tropfen verbleiben, ist es bekannt, die Stopfen in dem Prozeßbehälter derart zu bewegen, daß eine möglichst vollständige Trocknung erfolgt.After steam sterilization are the closure elements wet and need to be removed before taking be dried. A usable for this, conventional Dryer is known from DE 41 39 860. So that no drops remain, it is known that To move plug in the process container such that As complete as possible drying takes place.

Hierzu ist es bekannt, den Prozeßbehälter während der Zufuhr von Warmluft mechanisch zu bewegen, um zu erreichen, daß während des Trocknungsvorganges die Verschlußelemente jeweils gegenüber ihrer vorherigen Lageposition andere Positionen einnehmen, damit die Warmluft auch diejenigen Bereiche der Verschlußelemente erreichen kann, die bei der vorhergehenden Lageposition entweder gegen die Innenwandung des Prozeßbehälters oder gegen andere Stopfen anlagen (sog. Wenden). Hierbei ist nachteilig, daß für die Erzeugung einer mechanischen Bewegung des Prozeßbehälters aufwendige Einrichtungen erforderlich sind. Außerdem tritt durch die ständige Reibung der Verschlußelemente gegeneinander bei Trocknungsverfahren nach dem Stand der Technik ein unerwünschter Partikelabrieb auf. Weiterhin tritt insbesondere bei silikonisierten Verschlußelementen während bekannten Trocknungsverfahren häufig das unerwünschte Phänomen auf, daß die Verschlußelemente aneinander haften und somit verklumpen (sog. Kompaktieren).For this purpose, it is known, the process container move mechanically during the supply of warm air, to achieve that during the drying process the closure elements respectively opposite take different positions from their previous position so that the warm air also those areas can reach the closure elements, in the previous Position either against the inner wall of the process container or against others Plug systems (so-called turning). This is disadvantageous that for the generation of a mechanical movement the process container consuming facilities required are. It also occurs due to the constant friction the closure elements against each other in drying processes an undesirable according to the prior art Particle abrasion. Furthermore occurs in particular at siliconized fastener elements during known drying process often the undesirable Phenomenon on that the closure elements stick together and thus clump together (so-called compacting).

Es sind auch Wirbelschichttrockner bekannt, beispielsweise aus "K. Kröll: Trockner und Trocknungsverfahren, Springer-Verlag 1959, S. 275 ff", t bei denen Luft ständig mit solcher Geschwindigkeit durch eine Schicht von Teilchen nach oben strömt, daß die Teilchen leicht angehoben und aufgelockert, aber nicht weggetragen werden. Dabei sind sämtliche Teile dauernd in Bewegung. Hierdurch können rieselfähige Güter, zu denen auch Kunststoffe gehören können, getrocknet werden. Nachteilig ist hier ebenfalls, daß die Teilchen aufgrund ihrer Bewegung häufig aneinanderstoßen und dabei einen erheblichen Abrieb erzeugen. Darüberhinaus sind diese wirbelschichttrockner nicht für Teilchen geeignet, die zum Verklumpen bzw. Kompaktieren neigen.Fluid bed dryers are also known, for example from K. Kröll: Dryer and Drying Process, Springer-Verlag 1959, p. 275 ff., In which Air constantly at such speed through one Layer of particles flows upwards that particles slightly raised and loosened, but not carried away become. All parts are permanently in Move. This allows free-flowing goods to which also plastics may belong, be dried. Another disadvantage here is that the particles due to of their movement often clash and thereby produce a considerable abrasion. Furthermore These fluidized bed dryers are not for particles suitable, which tend to clumping or compacting.

In der DE 42 11 485 C2 wird ein Verfahren zur Entfernung von Feuchtigkeit aus dem Inneren eines Feststoffes, beispielsweise aus Holz beschrieben. Das Holz wird dabei zunächst mit einem hohen Druck beaufschlagt, der die Flüssigkeit mechanisch aus dem Feststoff austreibt, und anschließend einem periodisch rasch wechselnden Druck ausgesetzt, um die restliche Feuchtigkeit zu entfernen. Auch hier ist durch den ständigen Druckwechsel die Gefahr eines starken Partikelabriebs gegeben.In DE 42 11 485 C2 discloses a method for Removal of moisture from the inside of a Solid, for example, described from wood. The Wood is first subjected to a high pressure, the liquid mechanically from the solid drives out and then one periodically rapidly changing pressure to the rest Remove moisture. Again, by the constant Pressure change the risk of heavy particle abrasion given.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Durchführung dieses Verfahrens der eingangs genannten Art zu schaffen, mit dem bzw. mit der untermöglichst geringem technischen Aufwand eine möglichst vollständige Trocknung kleiner Gegenstände erreicht und dabei ein Partikelabrieb und ein Kompaktieren weitestgehend vermieden wird.The present invention has the object underlying a method and an apparatus for Implementation of this method of the aforementioned To create kind, with or with the as much as possible low technical complexity as complete as possible Drying of small objects achieved while doing Particle abrasion and compaction largely is avoided.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß durch die Merkmale von Anspruch 1.The solution of this task is carried out according to the invention by the features of claim 1.

Hierbei ist vorteilhaft, daß ein schonendes Anheben und nachfolgendes Wenden der kleinen Gegenstände derart erfolgt, daß anschließend die heiße Luft auch an in der vorherigen Lageposition unzugängliche Bereiche herangeführt wird und damit letztlich ein allseitiges Trocknen gewährleistet ist, ohne daß ein Kompaktieren beispielsweise silikonisierter kleiner Gegenstände auftritt.It is advantageous that a gentle lifting and subsequent turning of the small objects such that then the hot air also inaccessible in the previous position Areas and thus ultimately an all-round one Drying is ensured without a compacting For example, siliconized small objects occurs.

Eine Vorrichtung zur Durchführung des Verfahrens ist durch die Merkmale von Anspruch 2 gekennzeichnet. A device for carrying out the method is characterized by the features of claim 2.

Die Erfindung wird nachfolgend anhand des in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert.The invention will be described below with reference to the in the drawing schematically illustrated embodiment explained in more detail.

Die einzige Figur zeigt eine schematische Darstellung eines Prozeßbehälters und eines Druckwindkessels mit den entsprechenden Leitungsverbindungen. Die zur Prozeßsteuerung erforderlichen Ventile sind nicht dargestellt.The single figure shows a schematic representation a process vessel and a pressurized wind turbine with the appropriate line connections. The valves required for process control are not shown.

Ein mit 1 bezeichneter Prozeßbehälter ist zur Behandlung von Verschlußelementen für pharmazeutische Zwecke vorgesehen. Die Behandlung weist eine Waschphase, ggf. eine Silikonisierungsphase, eine anschließende Sterilisierphase und eine sich daran anschließende Trocknungsphase auf. Gegenstand der vorliegenden Erfindung ist lediglich die Trocknungsphase.A designated 1 process container is for Treatment of closure elements for pharmaceutical Intended purpose. The treatment has one Washing phase, optionally a siliconization phase, a subsequent Sterilization phase and a subsequent Drying phase on. Subject of the The present invention is merely the drying phase.

Der Prozeßbehälter 1 weist eine mit2 bezeichnete, perforierte Auflage für die Verschlußelemente, z. B. Stopfen (nicht dargestellt) auf. Die Verschlußelemente werden in den Prozeßbehälter 1 über eine (nicht dargestellte) Öffnung eingeführt. Dem Prozeßbehälter 1 wird von einem schematisch dargestellten Anschluß 3 aus über ein eine Rohrverbindung und ein Medienrohr 4 hochreines Wasser (WFI, Water for Injection) zugeführt. Ggf. werden über einen Anschluß 5 Detergentien zugegeben. Für den Waschvorgang wird Druckluft über einen Anschluß 6 über eine Leitung 7 und das Medienrohr 4 dem Inneren des Prozeßbehälters zugeführt, wodurch die Verschlußelemente in dem Wasser bewegt werden und dadurch der Waschvorgang erfolgt. Die Druckluft entweicht über einen Abluftanschluß 15. Nach Abschluß des Waschvorgangs wird das Wasser über einen Wasserablaß 8 abgeleitet.The process container 1 has a designated 2, perforated support for the closure elements, z. B. plug (not shown). The closure elements be in the process container 1 via a (not shown) Opening introduced. The process container 1 is from a schematically illustrated terminal 3rd from over a pipe connection and a media pipe 4 high purity water (WFI, Water for Injection) supplied. Possibly. Be a terminal 5 detergents added. For the washing process, compressed air is over a port 6 via a conduit 7 and the media tube 4 fed to the interior of the process container, whereby moves the closure elements in the water and thereby the washing process takes place. The Compressed air escapes via an exhaust air connection 15. Nach Completion of the washing process, the water is over a Water drain 8 derived.

Bei Bedarf kann anschließend eine Silikonisierung erfolgen. Hierzu wird dem Behälterinneren erneut Wasser zugeführt, welchem Silikon über eine Dosiereinrichtung 9 zugesetzt wurde. Anschließend werden die Verschlußelemente erneut mittels zugeführter Druckluft bewegt. Nach Abschluß des Silikonsiervorganges wird das Wasser wiederum abgelassen.If necessary, then a siliconization respectively. For this purpose, the container interior is again Supplied water, which silicone via a metering device 9 was added. Subsequently, the Closure elements again by means of supplied compressed air emotional. After completion of the siliconizing process the water drained again.

Anschließend erfolgt ein Sterilisiervorgang. Hierzu wird dem Prozeßbehälter 1 von der Oberseite her Reindampf über einen Anschluß 10 zugeführt. Die Sterilisation erfolgt bei etwa 120°C über etwa 20 Minuten bei erhöhtem Druck. Nach dem Sterilisieren wird der Prozeßbehälter wieder auf Atmosphärendruck gebracht.Subsequently, a sterilization process. For this purpose, the process container 1 from the top pure vapor supplied via a terminal 10. The Sterilization occurs at about 120 ° C for about 20 minutes at elevated pressure. After sterilization, the Process container brought back to atmospheric pressure.

Anschließend erfolgt der Trocknungsvorgang der Verschlußelemente. Hierzu wird dem Inneren des Prozeßbehälters über das Medienrohr 4 erwärmte Sterilluft über einen Anschluß 11 zugeführt.Subsequently, the drying process takes place the closure elements. This is the interior of the Process container via the media tube 4 heated sterile air supplied via a terminal 11.

Um ein allseitiges Trocknen in schonender - d. h. einen Partikelabrieb vermeidender - Weise zu erreichen, wird dem Inneren des Prozeßbehälters über das Medienrohr 4 und ein Prozeßrohr 12 taktweise ein Luftmassenstrom aus einem mit 13 bezeichneten Druckwindkessel zugeführt. Der Druckwindkessel 13 steht an der dem Prozeßrohr 12 gegenüberliegenden Seite mit dem Druckluftanschluß 6 in Verbindung, so daß bei geschlossenem Druckwindkessel 13 und Zufuhr von Druckluft 6 ein Überdruck aufgebaut werden kann. Über eine (nicht dargestellte) Steuereinrichtung wird dann aus dem unter Überdruck stehenden Druckwindkessel 13 ein dosierter Luftmassenstrom dem Prozeßbehälter 1 von der Unterseite, also durch die perforierte Auflage 2 der Verschlußelemente, zugeführt. Dies hat zur Folge, daß die auf der Auflage 2 aufliegenden Verschlußelemente angehoben und gewendet werden, wobei unter Wenden verstanden wird, daß die Verschlußelemente gegenüber ihrer vorherigen Position jeweils eine andere Position einnehmen, so daß die warme Sterilluft 11 auch diejenigen Bereiche der Verschlußelemente erreichen kann, die bei der vorhergehenden Lageposition entweder gegen die Innenwandung des Prozeßbehälters 1 oder gegen andere Verschlußelemente anlagen. Dieser Umlagerungs- bzw. Wendeprozeß kann ggf. mehrfach wiederholt werden, bis der gewünschte Trocknungsgrad erreicht ist.In order to dry all-round in gentler - d. H. to avoid a particle abrasion - to reach way is the inside of the process container over the Media tube 4 and a process pipe 12 cyclically a mass air flow from a designated with 13 pressure wind boiler fed. The pressure wind boiler 13 is at the opposite side of the process pipe 12 with the compressed air connection 6 in conjunction, so that when closed Compressor 13 and supply of Compressed air 6 an overpressure can be built up. about a controller (not shown) then becomes from the pressurized pressure vessel under pressure 13 a metered air mass flow the process container 1 from the bottom, so through the perforated pad 2 of the closure elements supplied. As a consequence, that resting on the support 2 locking elements be raised and turned, taking under Turning is understood that the closure elements one each from their previous position Take position so that the warm sterile air 11 too reach those areas of the closure elements can, at the previous location position either against the inner wall of the process container. 1 or against other closure elements systems. This Stock transfer or reversal process can be multiple if necessary be repeated until the desired degree of drying is reached.

Anschließend kann der Prozeßbehälter mit den darin befindlichen Verschlußelementen mit Stickstoff über einen Anschluß 14 überlagert werden.Subsequently, the process container with the closure elements contained therein with nitrogen be superimposed on a terminal 14.

Claims (2)

  1. A method of drying small articles disposed in a process container (1), such as closure elements of pharmaceutical receptacles or the like, after a treatment of the closure elements, wherein an air-permeable support (2) is arranged under the small articles, prepared preheated air (11) is fed to the interior of the process container, the small articles are dried by the prepared preheated air (11) while they are resting on the support (2), and an additional mass flow of air (13, 12) is passed under the support (2) for a short time at least once during the drying operation from a compressed-air tank (13), said additional flow of air lifting the small articles relative to the process container and thereby turning them, whereby complete drying is effected.
  2. Apparatus for carrying out the method according to claim 1 comprising a feed means for feeding the prepared preheated air (11) into the process container (1), wherein the support (2) is perforated, characterised in that the process container (1) communicates by way of a process tube (12) with a compressed-air tank (13) which is under an increased pressure in relation to the pressure in the process container, there is provided a control device for at least once feeding an additional mass flow of air out of the compressed-air tank into the process container, and that the process tube is connected to said process container beneath the perforated support (2), and that the apparatus is arranged to the effect that during the feeding of said prepared preheated air (11) closure elements of pharmaceutical receptacles resting on said support (2) are lifted and turned on feeding said additional mass flow of air.
EP98100096A 1997-01-15 1998-01-07 Process for turning small objects in a container and apparatus for carrying out this method Expired - Lifetime EP0854336B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19701154 1997-01-15
DE19701154A DE19701154B4 (en) 1997-01-15 1997-01-15 Method for drying small objects located in a process container, and device for carrying out this method

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EP0854336A1 EP0854336A1 (en) 1998-07-22
EP0854336B1 EP0854336B1 (en) 2001-07-18
EP0854336B2 true EP0854336B2 (en) 2005-07-27

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US (1) US6006441A (en)
EP (1) EP0854336B2 (en)
AT (1) ATE203318T1 (en)
DE (2) DE19701154B4 (en)
DK (1) DK0854336T4 (en)

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CN115900260A (en) * 2022-10-31 2023-04-04 赣州雄博新能源科技有限公司 Drying device is used in lithium ion battery production

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DE19701154B4 (en) 2006-02-16
US6006441A (en) 1999-12-28
EP0854336A1 (en) 1998-07-22
DK0854336T4 (en) 2005-11-28
ATE203318T1 (en) 2001-08-15
EP0854336B1 (en) 2001-07-18
DK0854336T3 (en) 2001-11-05
DE59801023D1 (en) 2001-08-23
DE19701154A1 (en) 1998-07-16

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