Device for Sealing a Reagent Container

Abstract

A device for sealing a reagent container storing and providing liquids, in particular in an analyzer system. The invention also relates to a reagent container using such device for sealing, a cartridge for holding such reagent container, and a method for removing a liquid from such reagent container. The instant invention provides a device for sealing a reagent container comprising an annular member configured to be inserted into the reagent container, wherein the annular member is configured to being movably coupled to the reagent container relative to its longitudinal center axis; an opening passing from a top end of the annular member to a bottom end of the annular member; and a sealing element arranged between the top end and the bottom end of the annular member for sealing the opening.

Claims

1. A device for sealing a reagent container comprising: an annular member configured to be inserted into the reagent container, wherein the annular member is configured to being movably coupled to the reagent container relative to its longitudinal center axis; an opening passing from a top end of the annular member to a bottom end of the annular member; and a sealing element arranged between the top end and the bottom end of the annular member for sealing the opening, wherein the sealing element is formed as a flexible septum and configured to be penetrable by a needle tip of a suction needle.

2. The device according to claim 1, wherein the opening has a conical shape, its smaller diameter end being at the bottom end of the annular member.

3. The device according to claim 1, wherein the opening is configured for abutting a bevel portion of a suction needle.

4. The device according to claim 1, wherein the annular member has at least one recess.

5. The device according to claim 4, wherein the at least one recess is formed at the outer circumferential surface of the annular member.

6. The device according to claim 1, wherein the annular member has an outer diameter slightly smaller than an inner diameter of the reagent container.

7. A reagent container for storing and providing liquids in an analyzer system, comprising: a device with an annular member configured to be inserted into the reagent container, wherein the annular member is configured to being movably coupled to the reagent container relative to its longitudinal center axis; said device having an opening passing from a top end of the annular member to a bottom end of the annular member; and a sealing element wherein the sealing element is formed as a flexible septum and configured to be penetrable by a needle tip of a suction needle, said sealing element being arranged between the top end and the bottom end of the annular member for sealing the opening, wherein the device is movably coupled to the reagent container relative to its longitudinal center axis; and a main body; and a collar having an outlet, wherein the outlet has a guiding portion for guiding a suction needle into the inner of the reagent container.

8. The reagent container according to claim 7, wherein a bottom end of the main body of the reagent container is conically shaped.

9. A cartridge for holding of at least one reagent container for storing and providing liquids, in particular in an analyzer system, comprising: a device an annular member configured to be inserted into the reagent container, wherein the annular member is configured to being movably coupled to the reagent container relative to its longitudinal center axis; said device having an opening passing from a top end of the annular member to a bottom end of the annular member; and a sealing element wherein the sealing element is formed as a flexible septum and configured to be penetrable by a needle tip of a suction needle, said sealing element being arranged between the top end and the bottom end of the annular member for sealing the opening, wherein the device is movably coupled to the reagent container relative to its longitudinal center axis; and a main body; and a collar having an outlet, wherein the outlet has a guiding portion for guiding a suction needle into the inner of the reagent container.

10. A method for removing a liquid from a reagent container comprising the steps of: providing a reagent container for storing and providing liquids with a device having an annular member configured to be inserted into the reagent container, wherein the annular member is configured to being movably coupled to the reagent container relative to its longitudinal center axis; said device having an opening passing from a top end of the annular member to a bottom end of the annular member; and a sealing element wherein the sealing element is formed as a flexible septum and configured to be penetrable by a needle tip of a suction needle, said sealing element being arranged between the top end and the bottom end of the annular member for sealing the opening, wherein the device is movably coupled to the reagent container relative to its longitudinal center axis; and a main body; and a collar having an outlet, wherein the outlet has a guiding portion for guiding a suction needle into the inner of the reagent container; moving a suction needle downwards; guiding the suction needle by a guiding portion into an opening of an annular member of a device for sealing the reagent container; penetrating a sealing element with a needle tip of the suction needle; abutting a bevel portion of a suction needle with the opening of the annular member; pushing the annular member downwards, which is movably coupled to the reagent container relative to its longitudinal center axis, until the needle tip reaches the liquid stored in the reagent container; and taking liquid from the reagent container by the suction needle.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0020] The invention will now be described on the basis of figures. It will be understood that the embodiments and aspects of the invention described in the figures are only examples and do not limit the protective scope of the claims in any way. The invention is defined by the claims and their equivalents. It will be understood that features of one aspect or embodiment of the invention can be combined with a feature of a different aspect or aspects of other embodiments of the invention. It shows:

[0021] FIG. 1A is a cross-sectional view of a reagent container in accordance with a first embodiment;

[0022] FIG. 1B is a cross-sectional view of the reagent container illustrated in FIG. 1A additionally showing an inserted suction needle;

[0023] FIG. 1C is a cross-sectional view of a reagent container in accordance with another aspect of the invention;

[0024] FIG. 2A is a cross-sectional view of a reagent container in accordance with a second embodiment;

[0025] FIG. 2B is a top view of the reagent container illustrated in FIG. 2A;

[0026] FIG. 3A is a cross-sectional view of a reagent container in accordance with further aspect of the invention;

[0027] FIG. 3B is a cross-sectional view of the reagent container illustrated in FIG. 3A additionally showing the removing of liquid by the suction needle.

[0028] FIG. 4A is a perspective side view of a cartridge for holding at least one reagent container as illustrated in FIG. 1C;

[0029] FIG. 4B is a cross-sectional view of the cartridge illustrated in FIG. 4A;

[0030] FIG. 5A is a perspective side view of a reagent container in accordance with another aspect of the invention;

[0031] FIG. 5B is a cross-sectional view of the reagent container illustrated in FIG. 5A without showing the inserted suction needle;

[0032] FIG. 5C is a cross-sectional view of the reagent container illustrated in FIG. 5A;

[0033] FIG. 6A is a cross-sectional view of a reagent container in accordance with another aspect of the invention; and

[0034] FIG. 6B is a cross-sectional view of the reagent container illustrated in FIG. 6A additionally showing the inserted suction needle.

DETAILED DESCRIPTION OF THE INVENTION

[0035] The invention provides a device for sealing a reagent container, which is used in automatic analyzer systems. The device is configured such that the evaporation of the reagent is reduced during the whole lifetime. The lifetime includes the transport of the reagent in the container or vial from a producer to a user and the storage by the user. The invention provides a reduction of the evaporation of the reagent in the container after the first use. In some cases, the containers with the reagents remain over months in the automatic analyzer systems. In other cases, the containers are stored in fridges outside of the automatic analyzer systems.

[0036] The device for sealing the reagent container or vial may include an annular member or lid, which is configured to be inserted into the reagent container. The annular member is movably coupled to the container relative to its longitudinal center axis. The device may also include a sealing element arranged at a bottom end of the annular member. The sealing element can be formed as a flexible septum. The annular member may have an opening formed as a conical shape, wherein its smaller diameter end abuts with a bevel portion of a pipettor needle. The diameter of the tip of the pipettor needle is configured to be smaller than the smaller diameter end of the conical-shaped opening of the annular member. This configuration allows only the needle tip passing through the opening of the annular member. Since only the tip of the pipettor needle is exposed to the reagent during the following withdrawal thereof, the washing process of a non-detachable tip (e.g., a steel tip) is simplified. However, with this invention also disposable tips can be used.

[0037] The annular member is held by sticking friction between the annular member and the reagent container. When the pipettor needle is moved into the annular member, in particular into the opening, at slow speed, the tip of the needle opens the flexible septum and reaches downwards until the bevel portion of the needle abuts with the end of the opening. If the pushing force amount of the needle is greater that the sticking friction between the annular member and the reagent container, the annular member is moved downwards by the bevel portion of the needle. If the needle tip reaches the liquid surface, the pipettor needle will stop the movement. After a desired amount of reagent has been removed (i.e., after the sucking process of the pipettor needle) the needle is again moved upwards and the flexible septum closes. The annular member remains in its position due to the sticking friction between the annular member and the reagent container. The annular member may be moved in that way that it stays always above the reagent level with an air gap between the annular member and the liquid level of the reagent. During the transport or storage of the reagents containing magnetic beads, these beads may stick on the annular member or on the inner circumferential surface of the container. Due to the air gap provided between the movable annular member and the liquid surface, little shaking of the reagent container or vial will bring the beads back into the liquid.

[0038] The reagent container may comprise a collar or top portion having an outlet with a guiding portion, wherein the guiding portion is configured to guide the pipettor needle into the inner of the reagent container. The reagent container or annular member may comprise further a cap or foil-coating for sealing the reagent container before first use or for storing. As a result, the reagent in the container is covered by the movable device during the whole lifetime. A further advantage of the completely sealed reagent container is that the container can be rotated without any loss of liquid. Since all components of the above reagent container are formed with a low complexity, there is a high potential of saving costs if produced in high volume. The bottom of the reagent container may be formed as a cone for reducing dead volume. Further, the reagent container may comprise at least one foot element at its end portion for placing the reagent container in an upright position.

[0039] The invention relates also to a device for sealing a reagent container or vial having an annular member, which may be configured to float at the liquid surface of the reagent in the container or lid. In this alternative approach of the invention, the annular member is also movably formed, wherein the reagent container may comprise at least three ribs to stabilize the annular member and to keep the annular member in position. The annular member may have the form of a floating ring or floating cover having at least three recesses for accommodating the at least three ribs of the reagent container. The annular member also includes an opening where the pipettor needle is to be inserted. A flexible septum may be fixed on top of the annular member covering the opening. The reagent container or annular member may comprise further a cap or foil-coating for sealing the reagent container before first use or for storing. As a result, the reagent in the container is covered by the movable device during the whole lifetime. A further advantage of the completely sealed reagent container is that the container can be rotated without any loss of liquid. Since all components of the above reagent container are formed with a low complexity, there is a high potential of saving costs if produced in high volume.

[0040] The invention relates also to a cartridge for holding at least one reagent container. The cartridge is configured such that the at least one container with its collar or top portion can be placed in an upright position for enabling a support for upright handling.

[0041] The invention further relates to a device or cap for sealing a reagent container or bottle, where the reagent is filled in a bag with no air inside. On the upper side of the bag there is a cap. The cap has at least two parts, a movable part fixed at the bag and a second part, which is movably coupled with the fixed part. The moveable part may comprise an opening for inserting the pipettor needle. Small drill holes or notches may be connect the opening and the outside of the movable part of the cap. The movable part may be held in closed position by a spring. In this position, the drill holes are covered by the fixed part of the cap. If the needle tip drives downwards the moveable part will be pushed downwards. In the lower position there is a liquid connection between pipettor needle and bag content via the drill holes inside the movable cap. In this position, the liquid can flow through the hole into the aspirating pipettor needle. When the needle moves upwards, the cap will be closed by the spring. As a result, the reagent in the container is covered by the cap during the whole lifetime. Further advantages of the completely sealed reagent container are that the container or bottle does not need a separate sealing member, for example a septum, and that the container or bottle can be rotated.

[0042] In a further approach, the invention relates to a lid, which is clamped inside the reagent container or vial. The lid may be placed above the liquid level of the reagent. The lid may comprise a basin, which is filled with liquid through at least one hole formed in the basin. The pipettor moves the needle tip inside the basin to aspirate the liquid. The tip pushes the lid downwards. This may be done before, after or during the aspiration process. During the movement, the reagent can flow through the at least one hole into the basin. As a result, the reagent in the container is covered by the lid during the whole lifetime. Further advantages of the completely sealed reagent container are that the container or bottle does not need a separate sealing member, for example a septum.

[0043] The invention further relates to a device having a cap with a flexible material, which is fixed on the top of a reagent container or vial, or bottle. The cap may have a hole with a bevel section. The Diameter of the hole is smaller than the diameter of the pipettor needle. The needle stretches the hole. The pipettor aspirates the reagent through a tube. The cap may comprise a small gap for pressure equalization. The tube may comprise a valve to reduce evaporation of the liquid. In another approach, the above mentioned cap can also be formed with a piston pump.

[0044] The advantages of the invention of the present disclosure can be summarized as follows: [0045] a. The reagent is covered by the movable device during the whole lifetime. Hence, evaporation of the liquid filled in the reagent is reduced. [0046] b. The invention can be used with disposable tips and steel tips. [0047] c. The washing process of the tip is simplified. It is only a tip washing process necessary, because there is only the needle tip in contact with the reagent. [0048] d. Depending on the embodiment, during the transport or storage of reagents containing magnetic beads, these beads may stick on the lid or elsewhere. As there is just a small air gap between lid and liquid, little shaking of the vial will be enough to bring the beads back into the liquid. [0049] e. The vial can be rotated without any loss of liquids. [0050] f. Several bottle sizes can be combined with this solution. [0051] g. Cheap components if produced in high volume. [0052] h. The device can be combined with another lid or foil on the top of the vial for storing in the fridge. [0053] i. The reagent container can be placed on a horizontal surface. [0054] j. The reagent container can be positioned in a cartridge in an upright position. [0055] k. The dead volume of the reagent container can be reduced by providing a cone-shaped bottom of the reagent container. [0056] l. Elimination of evaporation of the reagents to improve assay performance and stability of the analysis. [0057] m. From a manufacturer or distributor perspective, it generates benefits in marketing and customer satisfaction. From a consumer or user perspective, this reduces costs.

[0058] FIG. 1A shows a cross-sectional view of a device 1 in accordance with a first embodiment for sealing a reagent container 20 (e.g., a vial, or a bottle) for providing and storing liquids 30 (i.e., reagents), in particular in an analyzer system (not shown). The reagent container 20 has a main body 21 and a collar 22 having an outlet 23. The collar 22 can be integrally formed with the main body 21 or can be a separate member thereof. The outlet 23 is formed as a through hole having a guiding portion 24 on its top end. The guiding portion 24 can be formed as a bevel. The guiding portion 24 is configured to guide a suction needle 40 or pipettor needle through the outlet 23 into the inner of the reagent container 20. The top of the reagent container 20 may comprise an additional cap or foil-coating for sealing the reagent container 20 before first use.

[0059] As can be seen in FIG. 1A, an annular member is clamped into the reagent container 20 and is held in position by sticking friction between the annular member and the reagent container 20. Due to the sticking friction, the annular member is configured to be movably coupled to the reagent container 20 relative to its longitudinal center axis. The annular member may have at least one recess 7 formed at the outer circumferential surface of the annular member free of contact with the main body 21 of the reagent container 20 for adapting (e.g., reducing) the sticking friction between the annular member and the main body 21 of the reagent container 20.

[0060] As can be seen further in FIG. 1A, the annular member has an opening 3 passing from a top end 4 of the annular member to a bottom end 5 of the annular member. The opening 3 has a conical shape, its smaller diameter end being at the bottom end 5 of the annular member. The smaller diameter end of the opening 3 is axially centered with the outlet 23 of the collar 22 of the reagent container 20 for the perpendicular insertion of the suction needle 40. Due to its smaller diameter end, the opening 3 is configured for abutting a bevel portion 42 of the suction needle 40 (pipettor needle), which has a larger diameter than a tip 41 of the suction needle 40 (i.e., pipettor needle). The device 1 further comprises a sealing element 6, which is arranged between the top end 4 and the bottom end 5 of the annular member. In particular, as can been seen in FIG. 1A, the sealing element 6 is arranged at the bottom end 5 covering the smaller diameter end of the opening 3 for sealing. The sealing element 6 can be formed of a flexible material, which can be penetrated by the needle tip 41 of the suction needle 40. The sealing element 6 can be formed as a flexible septum.

[0061] FIG. 1B shows the suction needle 40 already inserted into the reagent container 20 in its positions for removing liquid 30 from the reagent container 20. In particular, for removing the liquid 30 from the reagent container 20, for example in the analyzer system (not shown), the suction needle 40 (pipettor needle), the outlet 23 of the reagent container 20 will be positioned below in the suction needle 40 or the suction needle 40 will be positioned above the outlet 23 of the reagent container 20. The suction needle 40 will be moved downwards, at slow speed, into the outlet 23 and the guiding portion 24 will guide the suction needle 40 into the inner of reagent container 20 further down until the opening 3 of the annular member of the device 1. As the suction needle 40 is moved further downwards, the needle tip 41 of the suction needle 40 will penetrate the sealing element 6 (i.e., the flexible septum). After penetrating the sealing element 6 with the needle tip 41, the bevel portion 42, which has a larger diameter than the needle tip 41, will abut the smaller diameter end of the opening 3 formed in the annular member of the device 1. The suction needle 40, in particular the bevel portion 42 thereof abutting the smaller diameter end of the opening 3, pushes the annular member downwards until the needle tip 41 reaches the surface of the liquid 30. When the needle tip 41 reaches the surface of the liquid 30 the suction needle 40 stops the movement and an air gap 43 is defined between the annular member and the surface of the liquid 30 (see position in FIG. 1B). After sucking the liquid 30 by the suction needle 40 (sucking process), the suction needle 40 including its needle tip 41 leaves the annular member and the reagent container 20. After passing the flexible septum (i.e., sealing element 6), the septum closes and the reagent container 20 is again completely covered.

[0062] FIG. 1C shows another aspect of the present invention showing the device 1 placed in a cap 25, which is mounted into the opening portion of the reagent container 20 as a unitary element. The cap 25 is in a preassembled condition in a state where the device 1 is already inserted into the cap 25. Further, as can be seen in FIG. 1C, the bottom of the reagent container 20 is formed as a cone for reducing dead volume of the liquid 30. Further, the reagent container 20 comprise at least one foot element 32 at its end portion for placing the reagent container 20 in an upright position on a horizontal surface.

[0063] FIG. 2A shows a cross-sectional view of a device 1 in accordance with a second embodiment showing a reagent container 120 (e.g., a vial, or a bottle) for providing and storing liquids 30 (i.e., reagents), in particular in an analyzer system (not shown). The reagent container 120 has a main body 121 and a cap 125 or a foil-coating for sealing the reagent container 120 before first use. As can be seen in FIG. 2A, a device 101 having an annular member 102 is inserted into the reagent container 120 and is configured to float at the surface of the liquid 30 of the reagent container 120. The annular member 102 may have the form of a floating ring or floating cover. The annular member 102 may have an outer circumferential diameter, which is slightly smaller than the inner diameter of the reagent container 120. The main body 121 of the reagent container 120 may comprise at least three ribs 108 arranged opposite to each other with respect to the longitudinal center axis of the main body 121. The at least three ribs 108 projecting from the inner circumferential surface of the main body 121 of the reagent container 120 (see FIG. 2B). The annular member 102 comprises at least three recesses 109 for accommodating the at least three ribs 108 (see FIG. 2B). Hence, the device 101 and the main body 121 of the reagent container 120 are aligned with each other. The annular member 102 also includes an opening 103 where the pipettor needle is to be inserted. As a sealing element 106, a flexible septum may be fixed on top of the annular member 102 covering the opening 103.

[0064] FIG. 2B shows a top view of the reagent container 120 illustrated in FIG. 2A showing the ribs 108 of the main body 121 and the recesses 109 of the annular member 102 in more detail. As can be seen in FIG. 2B, four ribs 108 are circularly arranged on the inner circumferential surface of the main body 121 in equal intervals to each other. The at least three ribs 108 are configured such that they are accommodated by the at least three recesses 109 formed on the annular member 102 of the device 101 for keeping the device 101 on the surface of the liquid 30 in an approximately horizontal position.

[0065] FIG. 3A shows a cross-sectional view of a device 301 for sealing a reagent container 320 or bottle in accordance with a further aspect of the present invention. The device 301 comprises an annular member 302 or lid having an outer portion 304 and an inner portion 305. The outer portion 304 of the annular member 302 is clamped inside the reagent container 320. The device 301 is placed above the surface of the liquid 30. The inner portion 305 of the annular member 302 has a cup shape and is formed as a basin 44. At least one hole 46 is formed between the inner portion 305 and the basin 44. A suction needle 40, in particular a needle tip 41, is moved into the basin 44.

[0066] As can be seen in FIG. 3B, the basin 44 is in fluid communication with the inner of the reagent container 320 via the at least one hole 46. The suction needle 40 (i.e., pipettor) is placed above the device 301 and is moved downwards until the needle tip 41 of the suction needle 40 reaches the basin 44 filled with liquid 30. The suction needle 40 aspirates the liquid 30 from the basin 44. If the liquid 30 in the reagent container 320 reaches a liquid level where no liquid 30 can be drawn into the basin 44, the suction needle 40 is moved downwards and pushes the annular member 302 until the basin 44 is again filled with liquid 30 via the at least one hole 46. The pushing of the suction needle 40 can be done before, after or during the aspiration process of the suction needle 40.

[0067] FIG. 4A shows a perspective side view of a cartridge 70 for holding at least one reagent container 20 as illustrated in FIG. 1C. The cartridge 70 comprises a housing 71 with openings for accessing the inserted reagent containers 20 by the suction needle (not shown). The housing 71 may comprise a human readable label 72 regarding the information of the liquid stored in the cartridge 70. The openings may be covered by a foil (not shown) for sealing the openings, in particular the reagent containers 20 placed inside the housing 71, before first use. The housing 71 may be configured such that the housing 71 is formed as a two-part housing having two housing components, which are, for example, connected to each other by folding means, wherein one of the housing components is folded onto the other one of the housing components after the reagent containers 20 are inserted into one of the housing components. However, the present invention is not limited thereto, the two housing components can be connected by other means if necessary and/or desired for providing a re-closeable system.

[0068] FIG. 4B shows a cross-sectional view of the cartridge illustrated in FIG. 4A. The reagent containers 20 can be stored into the cartridge 70 in an upright position by placing the collar 22 of the reagent container 20 in a suitable snap-in system. Hence, this enables a simple assembly of the reagent containers 20 into the cartridge 70 with no tools required. Since, the reagent containers 20 are stored in the cartridge 70 in an upright position, the handling of the reagent containers 20 can be improved. Hence, a simple and compact design of the cartridge for potential storage racks is created enabling a secondary packaging.

[0069] FIG. 5A shows a perspective view of a device 201 for sealing a reagent container 220 or bottle in accordance with another aspect of the present invention. The reagent container 220 has a main body 221, which comprises a bag 26 including the liquid 30 with no air inside. The device 201 couples the bag 26 to the reagent container 220 and comprises a cap 25. FIG. 5A shows further a suction needle 40, which is inserted into the device 201.

[0070] As can be seen in FIG. 5B, the cap 25 has a fixed part 28, which is fixed to the bag 26 and the reagent container 220, and a movable part 27, which is movable coupled along the longitudinal axis of the device 201. The fixed part 28 has a connecting hole 34 connecting the bag 26 with the inner space of the fixed part 28. A spring 29 is arranged in the inner space of the fixed part 28. The movable part 27 has a tubular shape with an opening 203 extending from a top end 204 of the movable part to a bottom end 205. The movable part 27 comprises on its bottom end 205 a stopper 33, which radially projects from the longitudinal axis of the movable part 27. The movable part 27 further comprises at least two notches 31 or drill holes at the bottom end 205. The movable part 27 is movable accommodated with the fixed part 28 and is biased by the spring 29 in a closed position. In the closed position, the stopper 33 abuts with the fixed part 28 and the notches 31 are covered by the fixed part 28 of the cap 25.

[0071] FIG. 5C is the cross-sectional view of the configuration illustrated in FIG. 5A. FIG. 5C shows an opening position, wherein the suction needle 40 (i.e., pipettor) is inserted into the device 201. The suction needle 40 is moved downwards until a bevel portion 42 of the suction needle 40 having a larger diameter than the opening 203 abuts with the top end 204 of the movable part 27 of the cap 25. When the bevel portion 42 abuts the top end 204 of the movable part 27, the suction needle 40 pushes the movable part 27 downwards against the biasing force of the spring 29, wherein the spring 29 is deflected. In this opening position, the needle tip 41 is in fluid communication with the liquid 30 of the bag 26 via the notches 31, the inner space of the fixed part 28, and the connecting hole 34. In the opening position, the liquid 30 can flow through the connecting hole 34, the inner space of the fixed part 28, the notches 31, and the opening 203 into the aspirating needle 40. When the suction needle 40 is moved upwards, the movable part 27 is pushed back in its closed position by the biasing force of the spring 29 and the cap 25 will be closed.

[0072] FIG. 6A shows a cross-sectional view of a device 401 for sealing a reagent container 420 or bottle in accordance with a further aspect of the present invention. The reagent container 420 comprises a main body 421, a collar 422, and an outlet 423. The device 401 comprises a cap 425 or cover inserted into the outlet 423. The cap 425 is arranged on top of the collar 422 of the reagent container 420. The cap 425 is tubular shaped and has an outer diameter slightly smaller than the diameter of the outlet 423 such that at least one narrow slot 53 or gap is formed between the cap 425 and the reagent container 420. The cap 425 is made from flexible material and comprises an opening 403 extending from a top end 404 to a bottom end 405 of the cap 425. The opening 403 has a bevel section 52 at the top end 404 of the reagent container 420. A tube 60 is mounted at the bottom end 405 of the cap 425. The tube 60 extends basically along longitudinal axis of the reagent container 420. The tube 60 includes an inlet 62 arranged at the distal end thereof.

[0073] As can be seen in FIG. 6B, a suction needle 40 is inserted into the flexible cap 425. Since the diameter of the opening 403 is configured to be slightly smaller than the diameter of the suction needle 40, in particular of the needle tip 41, the suction needle 40 (i.e., pipettor) stretches the cap 425. The suction needle 40 aspirates the liquid 30 from the reagent container 420 via the inlet 62 through the tube 60. The at least one narrow slot 53 formed between the cap 425 and the reagent container 420 enables pressure equalization (i.e., ventilation). The tube 60 further comprises a valve 61 to reduce evaporation of the liquid 30. During the aspiration process, the valve 61 is in an opened state.

[0074] In accordance with an even further aspect of the present invention, the cap 425 can be replaced by a device, which is formed as a known piston pump.

REFERENCE NUMERALS

[0075] 1, 101, 201, 301, 401 device [0076] 102, 302 annular member [0077] 3, 103, 203, 403 opening [0078] 4, 204, 404 top end [0079] 5, 205, 405 bottom end [0080] 6, 106 sealing element [0081] 7 recess [0082] 20, 120, 220, 320, 420 reagent container [0083] 21, 121, 221, 321, 421 main body [0084] 22, 422 collar [0085] 23, 423 outlet [0086] 24 guiding portion [0087] 25, 425 cap [0088] 26 bag [0089] 27 movable part [0090] 28 fixed part [0091] 29 spring [0092] 30 liquid [0093] 31 notch [0094] 32 foot element [0095] 33 stopper [0096] 34 connecting hole [0097] 40 suction needle [0098] 41 needle tip [0099] 42 bevel portion [0100] 43 air gap [0101] 44 basin [0102] 46 hole [0103] 52 bevel section [0104] 53 slot [0105] 60 tube [0106] 61 valve [0107] 62 inlet [0108] 70 cartridge [0109] 71 housing [0110] 72 human readable label [0111] 108 rib [0112] 109 recess [0113] 304 outer portion [0114] 305 inner portion