[0001] The present invention relates to a cap for closing a laboratory fluid container,
a kit comprising a cap, and a docking device for receiving a cap.
[0002] Many processes in the laboratory field, such as a cell-sorting process and in-vitro
diagnostics, require a sterile surrounding. Therefore, the used materials have to
be sterilized before they can be used. To sterilize technical equipment and fluids
autoclave methods can be used which are well-known in the state of the art.
[0003] Sterile fluids are usually stored in containers, such as tubes, bottles of flaks,
being equipped with a lid having a portion being sealed with a septum. To dispense
fluids out of such containers, a needle can pierce the septum, immerse into the container
and aspirate the fluid out of the container. In order to make sure that the needle
aspirates the fluid and not just gas above the fluid, the type of container and the
filling level must be known. Further, a needle must be chosen which is long enough
to aspirate the fluid at all filling levels, especially at a low filling level. Such
a needle is expensive and requires a complex treatment to clean it. To avoid any crash
of the needle at the bottom of the container, usually the needle is immersed only
to a certain level into the container. Further, the dispensing is stopped when the
fluid level is above said certain fluid level so that there is no risk for an aspiration
of gas. This has the drawback that the dead volume remaining in the container is relatively
high, which is a huge drawback when the used fluids are rarely available or expensive.
[0004] To address the latter of the above problems, it could be conceived to use standard
containers having a predefined size and a tapered bottom. However, there is still
the risk that there is a crash of the needle in case that the positioning of the needle
is not exact in the center of the container. An accurate positioning of the needle
may reduce said risk but positioning systems with a high accuracy are very expensive.
[0005] In view of the above circumstances, it is an object of the present invention to provide
a cap for closing a laboratory fluid container, a kit comprising a cap, and a docking
device for receiving a cap, with which the drawbacks of the prior art can be remedied.
[0006] This object is achieved by a cap for closing a laboratory fluid container, preferably
a sterile laboratory fluid container, comprising a lid having at least one lid opening,
and a septum being arranged adjacent to said lid opening and covering said lid opening.
The cap further comprises a fluid channel having an upper opening in fluid connection
with the septum, wherein the fluid channel has a tube portion adapted to extend into
a laboratory fluid container in a state in which a laboratory fluid container is connected
to the cap.
[0007] The cap has the advantage that there is no need for a needle for aspirating a fluid
out of a container to immerse more than a few millimeters into a laboratory fluid
container. According to a preferred procedure, a needle can be inserted through the
at least one lid opening and pierce the septum. Thereafter, the needle can be in fluid
connection with the fluid channel so that fluid can be aspirated out of the container
through the fluid channel and the needle. This can reduce the dead volume of the container
as the fluid channel can immerse into the container until it reaches the bottom thereof.
There is also no risk for any crash of the needle at the bottom.
[0008] Further, the cap can enable the usage of very short needles, which can be cleaned
and sterilized more easily than longer ones. Further, the time needed to immerse a
short needle into the cap is considerably reduced compared to an immersion of a long
needle to a bottom of a laboratory fluid container.
[0009] Even if a fluid channel reaching to the bottom of a laboratory fluid container provide
a great benefit regarding the dead volume, it is also possible that the extension
of the fluid channel is shorter, for example only a few millimeters, or to a mean
height of a laboratory fluid container.
[0010] In a pre-use condition the septum can prevent any fluid connection between the upper
opening of the fluid channel and the at least one lid opening. In other words, in
the pre-use condition, the septum is intact and has not been pierced before. The cap
according to the invention can be sterilized before it is used. It is also conceivable
that all parts of the cap, such as fluid channel, and septum, can be removed from
each other. This simplifies the cleaning procedure. All parts of the cap can be reusable.
However, they can also be exchanged separately. For example, the septum can be exchanged,
while the lid and the fluid channel can be reused.
[0011] The septum can be made of silicone. The fluid channel can extend from the septum.
The cap can include means to provide a sealed connection between the upper opening
of the fluid channel and the septum. There can be a flange at an upper end of the
fluid channel extending outward from the upper opening. The flange can be almost perpendicular
to an outer wall of the fluid channel. For a tighter contact between the septum and
the fluid channel the flange can have the shape of a funnel, whose smaller opening
can end in the upper opening of the fluid channel.
[0012] In one embodiment the upper opening of the fluid channel can be aligned with the
at least one lid opening so that a needle being inserted into the at least one lid
opening and piercing the septum will directly reach the upper opening. In this embodiment
the at least one lid opening and the tube opening can be coaxial. The upper opening
and the upper portion of the fluid channel can have an increased inner diameter compared
to an inner diameter of another portion of the fluid channel. This can enable that
a needle can immerse into the upper portion of the fluid channel, which can lead to
a better fluid connection between the needle and the fluid channel.
[0013] According to a further embodiment of the present invention, the cap can comprise
a tube seal having at least one tube seal through-hole adapted to sealingly receive
the tube portion. The tube seal can provide a sealed connection between the upper
opening of the fluid channel and the septum, so that there is no fluid leakage during
the dispensing of fluid out of a laboratory fluid container. Additionally, there might
be a fixed connection between the tube portion and the tube seal. The fixed connection
can be an adhesive connection, a glued connection, or a press-fit connection.
[0014] Preferably, the septum is sandwiched between the lid and the tube seal. Thus, the
flange of the fluid channel can extend between the tube seal and the septum.
[0015] The tube seal can be removed from the cap and can be cleaned or sterilized. Thus,
even if the cap has a tube seal, all parts of it can be removed, cleaned, or/and replaced.
[0016] The tube seal can also provide a sealing between the cap and a laboratory fluid container
to avoid any leakage of air or/and fluid out of said laboratory fluid container. Therefore,
the tube seal can comprise at least one projecting portion having a peripheral surface,
wherein the at least one projecting portion can be adapted to extend into a laboratory
fluid container so that the peripheral surface thereof can sealingly contact an inner
wall of said laboratory fluid container.
[0017] The projecting portion can be a projecting area, such as a circular projection, or
a projecting annular ring. An axis through a center of the at least one lid opening
can intersect the projecting portion or can be within an area framed by the peripheral
surface.
[0018] The projecting area can be an integral part of the tube seal or can be attached to
the tube seal.
[0019] In particular, the tube seal comprises a plurality of projecting portions each of
which has a peripheral surface, wherein the projecting portions can differ in their
dimensions, such as their circumferential surface or/and their height.
[0020] Each of the plurality of projecting portions can be adapted to extend into a certain
laboratory fluid container to provide a sealing for laboratory fluid containers having
different sizes. Each projecting portion can provide a peripheral surface adapted
to a certain type of laboratory fluid containers. In order words, one tube seal can
provide a plurality of peripheral surfaces being adapted to sealingly contact inner
walls of the same number of different laboratory fluid containers.
[0021] The plurality of projecting portions increases the usability of the cap. It can also
increase the number of applications for which the cap can be used.
[0022] In a further preferred embodiment of the cap, the lid can have a plurality of lid
openings each of which being arranged adjacent to said septum, which covers the plurality
of lid openings. The plurality of lid openings can allow the insertion of a plurality
of needles or tubes into the lid. May be one of the plurality of openings is associated
with a short fluid channel, for example to produce bubbles, another one may not have
any associated channel, for example to provide a gas exchange, and yet another one
can be associated with a fluid channel leading to the bottom of a laboratory fluid
container.
[0023] In general, the cross-sectional area of the plurality of lid openings can differ
from each other. Thus, it can be ensured that only needles having an acceptable outer
diameter can be inserted into the respective lid opening.
[0024] Accordingly, the tube seal can have a plurality of tube seal through-holes, wherein
at least two of them, preferably all of them, are associated with two of the plurality
of lid openings, preferably with all of the plurality of lid openings.
[0025] In one exemplarily simple case, the at least one tube seal through-hole can be axially
aligned with the at least one lid opening. In another example, one of the plurality
of tube seal through-holes can be axially aligned with the at least one lid opening,
or vice versa, one of the plurality of lid openings can be axially aligned with the
at least one tube seal through-hole. In another exemplarily case, a plurality of tube
seal through-holes can be axially aligned with the plurality of lid openings.
[0026] However, in all of the aforementioned exemplarily cases, the alignment must not be
axially. In some cases, which will be discussed later, an axially alignment cannot
be required but it can only be necessary that the at least one tube seal through-hole
is associated with the at least one lid opening or the plurality of tube seal through-holes
is associated with the plurality of lid openings. The important point is that in a
use-condition, in which the needle pierces the septum, the at least one lid opening
can be in fluid connection with the at least one tube seal through-hole, or the plurality
of lid openings is in fluid connection with the plurality of tube seal through-holes.
[0027] In general, the number of tube seal through-holes and the number of lid openings
can differ as long as at least one of each is aligned or associated.
[0028] For a relative positioning of the at least one tube seal through-hole and the at
least one lid opening the tube seal can comprise a positioning element for an angular
alignment of the tube seal to the lid. It is to be understood that the positioning
element can also be used in case of the plurality of tube seal through-holes or/and
the plurality of lid openings. The positioning element can be any element resulting
in a deviation of the tube seal from a circular symmetry, e.g. a tab, or a recess
of the tube seal can engage a respective recess or tab of the lid.
[0029] In a preferred embodiment of the present invention, the cap can further comprise
an adapter having first means for engaging said adapter and the lid. The adapter can
provide a sealing force for a sealing contact between the tube seal and the lid. This
sealing force can act on the tube seal in the direction of the lid so that the tube
seal is subjected to a compressive force. This sealing force is preferably high enough
for the tube seal to provide also a sealing contact between the lid and the septum,
preferably between the septum and the tube seal.
[0030] The first means can comprise a thread which is engageable with a thread of the lid.
The first means can also be a part of a snap coupling which can snap into a profile
of the lid. However, the invention is not restricted to a thread or snap coupling.
All first means can be used which can provide a tight connection between the adapter
and the lid.
[0031] It is also preferred that the adapter further has second means for engaging said
adapter and a laboratory fluid container. Thus, the adapter can enable a connection
of the cap and a laboratory fluid container. The second means can comprise a thread
which is engageable with a thread of a laboratory fluid container. The second means
can be configured for engaging the adapter with a conventional laboratory fluid container,
such as a container manufactured by Flacon™ or Eppendorf.
[0032] The first means can point outwardly and/or the second means can point inwardly with
regard to the adapter.
[0033] According to an alternative embodiment the cap cannot comprise any adapter. In this
alternative embodiment the cap may have means to engage the fluid container directly.
In this case, the thread of the lid can be configured to engage a thread of a laboratory
fluid container.
[0034] Likewise, the cap, preferably the adapter thereof, can further have identification
means to indicate compatibility with a certain laboratory fluid container. This enables
an easy association between the cap, preferably the adapter thereof, and a compatible
laboratory fluid container without the need of touching these parts and trying their
compatibility by experiments, which reduces the risk of contamination.
[0035] The identification means can be arranged at or be part of the adapter. The adapter
can have different shapes each of which can indicate the compatibility to a certain
laboratory fluid container.
[0036] According to one aspect of the invention, a kit can include the cap comprising an
adapter having first and second connection means, and a further adapter, wherein both
of the adapters have first connection means being identical and second connection
means differing from each other. The providing of different adapters with one cap
increases the range of application of the cap as each adapter fits to a different
laboratory fluid container. Thus, the cap can be used with different laboratory fluid
containers by exchanging the adapter.
[0037] The cap can further comprise rotational alignment means which are configured to define
at least one angular orientation thereof. The rotational alignment means can be very
useful if the tube is processed in an automated process to provide a defined position
of the at least one lid opening or the plurality of lid openings. The rotational alignment
means can be a shape of the cap, which deviates from an axial symmetry.
[0038] With regard to an automated positioning system, the process of inserting a needle
in a small opening can require positioning systems with a high accuracy, which can
be very expensive. Otherwise, an increase of the lid opening will lead to a higher
risk of leakage in case that the needle misses the upper opening of the fluid channel.
In order to avoid high costs for a very accurate positioning system and the risk of
leakage, it is suggested that the cap further comprises a fluid-conveying element
having a first opening facing to the lid and overlapping the at least one lid opening,
and a second opening being in fluid connection with the upper opening of the fluid
channel. Preferably, the second opening is opposite the first opening or/and faces
to the tube seal.
[0039] In this context overlapping can mean that the cross-sectional area of the first opening
of the fluid-conveying element is greater than the cross-sectional area of the at
least one lid opening. Preferably, the cross-sectional area of the first opening is
at least 5 percent, preferably, at least 15 percent, more preferably at least 25 percent,
greater than the cross-sectional area of the at least one lid opening.
[0040] The first opening of the fluid-conveying element can be considerably greater than
the tube opening and thus, the at least one lid opening can be increased compared
to an embodiment being free of a fluid-conveying element. Preferably, the first opening
of the fluid-conveying element extends in a depth direction from an upper surface
of the fluid-conveying element and ends in the second opening. Thus, fluid being inserted
into the first opening can be led to the second opening thereof. The second opening
can be adjacent to the upper opening of the fluid channel. The second opening of the
fluid-conveying element has preferably a cross-sectional area being the same or essentially
the same as the upper opening of the fluid channel.
[0041] Preferably, the fluid-conveying element is arranged adjacent to the septum. Thus,
the lid opening and the fluid-conveying element can be at opposite sides of the septum.
More preferably, the fluid-conveying element is arranged between the septum and the
tube seal. The fluid-conveying element can also be part of the tube seal or can be
connected to the tube seal.
[0042] In case of the plurality of lid openings, it is of advantage that the fluid-conveying
element has a plurality of annular channels each of which extends in a depth direction
from the upper surface of the fluid-conveying element, wherein each of the plurality
of the annular channels is associated with one of the plurality of lid openings.
[0043] The first opening can have the shape of an annular channel. This may have the benefit
that the at least one lid opening is aligned with the first opening independent of
the angular orientation of the at least one lid opening. It is also possible that
the at least one lid opening has a shape being almost identical with the first opening
of the fluid-conveying element.
[0044] The fluid-conveying element can also have a plurality of first openings and a plurality
of second openings. Each of the plurality of first openings can end in one of the
plurality of second openings. Each of the first openings can overlap one of the plurality
of lid openings.
[0045] According to a second aspect, the invention relates to a docking device for receiving
a cap, preferably a cap as described before, comprising a cap support element configured
to support the cap in a predefined position; and a needle retaining means configured
to retain at least one needle, wherein the needle retaining means is configured to
align a lid opening of a lid of the cap with a retained needle in a state in which
the cap is in a working position.
[0046] The docking device can provide a fast coupling of the cap and a needle which is adapted
to immerse into the lid opening. The cap support element supporting the cap in a predefined
position can enable a positioning of the cap in a defined angular orientation. In
this case, a position of each part of the cap is known. If the cap has a lid having
a lid opening for receiving a needle, the cap support element can ensure that the
lid opening is at the predefined position. In another case, the cap can have an axial
symmetrical shape, such as a circular shape, and the cap can be inserted in different
angular positions or the cap support element can allow a rotation of the cap around
its middle axis. In this case, only a radial position of the lid opening is predefined.
[0047] As the position of the cap is predefined and the needle retaining means is configured
to align the lid opening of the lid in a state in which the cap is in a working position,
the risk for a misalignment of a needle and the lid opening is reduced. Further, a
defined position of the needle can reduce the risk that the needle crashes to the
cap or a part of a laboratory fluid container.
[0048] Preferably, the cap support element is or is arranged at a docking drawer being slidable
between a withdrawn position in which the cap can be inserted in the docking drawer
and said working position. Thus, a user-friendly handling can be achieved.
[0049] A higher degree of automatization can be provided, if the docking device preferably
further comprises at least one sensor configured to identify an identification means
which indicates a compatibility of the cap with a certain laboratory fluid container.
The identification of the container provides information regarding the dimensions
of the container, such as its height, its shape, and its volume.
[0050] Further advantages and features of the present invention will become even clearer
from the following description of embodiments of the invention with reference to the
accompanying figures, wherein:
- Fig. 1
- shows a cap for closing a laboratory fluid container according to a first embodiment
of the present invention in an explosion view (Fig. 1a) and a cross-sectional view
(Fig. 1b),
- Fig. 2
- shows a conveying element which can be used in a second embodiment of the present
invention in a cross-sectional view (Fig. 2a) and a perspective view (Fig. 2b), and
- Fig. 3
- shows a docking device for receiving a cap according to an embodiment of the present
invention in a withdrawn position (Fig. 3a) and a working position (Fig. 3b) of the
cap support element.
[0051] Fig. 1a schematically shows a cap 10 for closing a laboratory fluid container 12
according to the invention, comprising a lid 14, a septum 16, and a fluid channel
18. The lid 14 as presented in Fig. 1a has four lid openings 20. It should be noted
that according to the invention only one of said lid openings 20 is mandatory. The
at least one mandatory lid opening is denoted by reference sign 22. As can be seen
in Fig. 1b, the septum 16 is arranged adjacent to the lid 14 and covers the at least
one lid opening 22, or the lid openings 20, respectively. The septum 16 can also be
adjacent to the fluid channel 18, wherein an upper opening 24 of the fluid channel
18 is in fluid connection with the septum 16. Further, the fluid channel 18 has a
tube portion 28, which is adapted to extend into a laboratory fluid container 12 in
the state, shown in Fig. 1b, in which the laboratory fluid container 12 is connected
to the cap 10.
[0052] Preferably, the middle axis of the at least one lid opening 22 and the middle axis
of the upper opening 24 of the fluid channel 18 are coaxial. This means that a tip
of a needle being inserted into the at least one lid opening 22 and piercing the septum
16 can reach the upper opening 24. It is also possible that the needle can contact
a circumferential wall of the upper opening 24. It is desirable that said contact
is a sealed contact.
[0053] For example, the upper opening 24 can be arranged at an upper portion 26 of the fluid
channel 18 which can have an increased inner diameter compared to an inner diameter
of another portion of the fluid channel 18, such as an adjacent portion. Due to the
increased diameter of the upper portion 26, a needle can immerse into the upper portion
26 to a certain extent, such as 2 to 10 mm. Such an immersion of a needle can provide
a contact between an outer wall of the needle and an inner wall of the upper portion
26 of the fluid channel 18. It is desirable that said contact is a sealed contact.
In other words, in this example, there might be the above mentioned contact between
a needle and the circumferential wall of the upper opening 24 and an additional contact
between the outer wall of the needle and the inner wall of the upper portion. Thus,
the sealing area and the sealing properties between a needle and the fluid channel
can be increased.
[0054] In the following, a possible use of the cap 10 will be described. The cap 10 can
be connected to a laboratory fluid container 12 so that the fluid channel 18 extends
into a laboratory fluid container and the lid 14 can close the opening of the laboratory
fluid container 12. In this initial state the septum is unpierced and no gas or liquid
can pass through the at least one lid opening 22. Further, the fluid channel 18 can
immerse into a fluid being in a laboratory fluid container 12. Preferably, the fluid
channel 18 extends until it reaches or almost reaches a bottom of a laboratory fluid
container 12. In order to dispense fluid out of a laboratory fluid container, a needle
can be inserted in the at least one lid opening 22 and can pierce the septum 16 so
that the needle is in fluid connection with the fluid channel 18. A suction pressure
applied to the needle can force said fluid to flow through the fluid channel 18 into
the needle and thus out of the laboratory fluid container 12.
[0055] In case of a plurality of lid openings 20, each of which can be associated with a
fluid channel. It is also possible that at least one of the plurality of lid openings
20 is not associated with a fluid channel. Furthermore, extension lengths of fluid
channels can be different. For example, one can extend until it reaches the bottom
of a laboratory fluid container and another one can be very short to be in contact
with a gas volume in a laboratory fluid container 12. Also the cross-sections of the
upper openings of the fluid channels can vary, such as to provide an adaption for
needles differing in their outer diameter. It is also possible that one of the plurality
of lid openings 20 is adapted to insert a gas or liquid into a laboratory fluid container
12. In such a case, no fluid channel needs to be associated as a needle piercing the
septum would be in fluid connection with a gas volume in a laboratory fluid container
12.
[0056] In the embodiment shown in Fig. 1, the cap 10 further comprises a tube seal 30 having
at least one tube seal through-hole 32 which can be adapted to sealingly receive the
tube portion 28 or the upper portion 26 of the fluid channel 18, wherein the upper
portion 26 can be a part of the tube portion 28. In particular, the fluid channel
18 and the tube seal 30 are in a sealed contact. The fluid channel 18 can have a flange
34 surrounding to the upper opening 4. As can be seen in Fig. 1b, the flange 34 can
be sandwiched between the septum 16 and the tube seal 30 to ensure a sealed connection
between the septum 16 and the fluid channel 18.
[0057] Besides the function of the tube seal 30 to hold the fluid channel 18, the tube seal
30 can also be adapted to provide a sealed contact between the lid 14 and a laboratory
fluid container 12. Therefore, the tube seal 30 can have an outer area 36 which is
configured to overlap an opening edge of a laboratory fluid container 12. In order
to provide a more reliable sealing between the container 12 and the lid 14, the tube
seal 30 can further comprise at least one projecting portion 38 being adapted to extend
into a laboratory fluid container 12 so that a peripheral surface 40 of the projecting
portion 38 sealingly contacts an inner wall of a laboratory fluid container 12.
[0058] It is also possible that the tube seal 30 comprises more than one projecting portion
38 to provide compatibility to more than one type of a laboratory fluid container
12. All of the projecting portions 38 can have a peripheral surface 40 as described
above.
[0059] In the shown embodiment, the number of tube seal through-holes 32 and lid openings
20 is the same. All of the tube seal through-holes 32 can be aligned with one of the
lid openings 20. Each of the tube seal through-holes is adapted to sealingly receive
a tube portion of a fluid channel; however, there is no necessity that each tube seal
through-hole receives a fluid channel.
[0060] The tube seal 30 can further comprise a tap 39 or another element 39 which lead to
a non-axial symmetry of the tube seal 30. This can enable a defined angular orientation
of the tube seal 30, preferably of the tube seal through-hole 32, in relation to the
lid 14, preferably the at least one lid opening 22.
[0061] The cap can further comprise rotational alignment means 15 which can be configured
to define at least one angular orientation thereof. The rotational alignment means
15 can be any deviation from a rotational symmetry of the cap 10, for example a non-round
shape of the lid 14.
[0062] According to one example (not shown), the cap 10 can comprise means to directly connect
the cap 10 to a laboratory fluid container 12. As a result, each cap needs to be manufactured
to exactly fit to a certain laboratory fluid container. A broader usability of the
cap 10 can be reached by using a cap 10 as shown in Fig. 1, further comprising an
adapter 42. Such an adapter 42 can have first means 44 for engaging the adapter 42
and the lid 14. Further, the adapter 42 can have second means 46 for engaging the
adapter 42 and a laboratory fluid container 12. As a result, only the adapter 42 needs
to be adapted to fit to or engage a certain laboratory fluid container 12. In other
words, the first means 44 can be identical for each adapter 42 and the second means
46 can differ between different adapters. The lid 12 can have means for engaging the
first means 44 of the adapter 42. In the illustrated example, the first and the second
means 44, 46 comprise threads.
[0063] The adapter 42 can further comprise identification means 47 indicating the compatibility
of the adapter 42 to a certain laboratory fluid container 12. In the example shown
in Fig. 1a the identification means 47 are a waveform of the lower edge of the adapter
47. However, also identification by a chip, a defined color or a bar code can be used.
[0064] The purpose of the adapter is to provide a kit comprising a cap 10 with the adapter
42 and a further adapter, wherein preferably both of the adapters have first means
44 being identical and second means 46 differing from each other. As all parts of
the cap 10 can be re-used and/or exchanged, the user has lots of possibilities to
use the cap 10 without the need of buying several different caps.
[0065] The first embodiment of the cap 10 as described above requires an alignment of the
at least one lid opening 22 of the lid 14 and the upper opening 24 of the fluid channel
18 to provide a fluid connection between a needle being inserted into the at least
one lid opening 22 and piercing the septum 16 to be in fluid connection with the upper
opening 24 of fluid channel 18. In case of handling of small fluid volumes, the lid
opening 22 as well as the upper opening 24 of the fluid channel might be very small,
such as only a few millimeters. As a result, the requirements for the positioning
of a needle are very high. The cap 10 according to a second embodiment provides a
cap reducing these requirements.
[0066] The second embodiment of the cap 10 can comprise all of the elements mentioned in
connection with the first embodiment of the cap 10. Features which are the same in
the first and the second embodiments will not be repeated, but differences will be
explained in the following.
[0067] The cap 10 according to the second embodiment can further comprise a fluid-conveying
element 50 as shown in Fig. 2. The fluid-conveying element 50 can have a first opening
52 and a second opening 54 which are in fluid connection, wherein the first opening
52 is greater than the second opening 54. Preferably, the cross-section of the second
opening 54 is identical or almost identical to the cross-section of the upper opening
24 of the fluid channel 18. The first opening 52 can be arranged adjacent to the septum
16 and the second opening 54 can open into the upper opening 24. The first opening
52 can overlap the at least one lid opening 22. It should be noticed that due to the
fluid-conveying element 50, the at least one lid opening 22 is associated with the
fluid channel 18 and can be brought in fluid connection if the septum is pierced.
[0068] As can be seen in Fig. 2, the lid opening 52 can extend in a depth direction from
an upper surface 56 of the fluid-conveying element 50 and can terminate in the second
opening 54. Thus, fluid being inserted into the first opening 52 can flow to the second
opening 54. In the example shown in Fig. 2, the first opening 52 can have the shape
of an annular ring. Thus, the at least one lid opening 22 can be arranged somewhere
adjacent to the first opening 52, so that a tip of a needle being inserted in the
at least one lid opening 22 and piercing the septum 16, will immerse within the first
opening 52, e.g. the annular ring shaped first opening 52. With respect to the above-mentioned
positioning requirement of a needle, in case of an annular ring, only a radial positioning
of a needle is necessary.
[0069] Even if the presented fluid-conveying element 50 has a first opening 52 in the shape
of an annular ring, also other shapes of the first opening 52 are possible. For example,
the first opening can also be an increased circular hole or can have a helical structure.
[0070] In order to provide a reliable usage of the fluid-conveying element 50, a tight contact
between the upper surface 56 of the fluid-conveying element 50 and the septum 16 should
be ensured as well as a sealing contact between the fluid channel and the second opening
54. Preferably, the fluid-conveying element 50 is sandwiched between the septum 16
and the tube seal 30. Thus, in the second embodiment, the fluid channel 18 can be
adjacent to the fluid-conveying element 50 and the flange 34 thereof can ensure a
sealed connection between the fluid conveying element 50 and the fluid channel 18.
[0071] Regardless as to whether or not the cap 10 comprises the fluid-conveying element
50, the adapter 42 can be adapted to provide a force pressing the seal tube 30, preferably
the outer area 36 thereof, against the lid 14, so that a compression force is acting
on the tube seal 30. In turn, the tube seal 30 presses the septum 16 in case of the
first embodiment, and the fluid-conveying element 50 and the septum 16 in case of
the second element against the lid 14. As a result, in case of the first embodiment,
a tight contact between the tube seal 30 and the septum 16 can be provided, and in
case of the second embodiment, a tight contact between the upper surface 56 of the
fluid-conveying element and the septum 16 as well as a tight contact between the tube
seal 30 and the fluid-conveying element 50 can be provided.
[0072] Fig. 3 shows a docking device 60 for receiving a cap, for example the cap 10 as described
above, comprising a cap support element 62 configured to support the cap 10 in a predefined
position of the cap 10. The cap support element 62 can be in a withdrawn position,
as shown in Fig. 3a, and a working position, as shown in Fig. 3b. Preferably, the
cap support element 62 is arranged at or is a docking drawer 62 being slidable between
the withdrawn position and the working position. In the withdrawn position, the cap
10 can be inserted into the cap support element 62.
[0073] The docking device 60 also comprises needle retaining means 64 configured to retain
at least one needle. When the cap support element 62 is in the working position, at
least one lid opening of a lid of the cap 10 can be aligned to at least one needle
retaining part of the needle retaining means 64. For example, the at least one lid
opening 22 of the cap 10 is aligned with a needle being retained by the needle retaining
means 64. It should be noted that also the plurality of lid openings 20 of the lid
14 can be aligned with a respective part of the needle retaining means 64.
[0074] As can be seen in Fig. 3a, rotational alignment means 66 can be provided to ensure
that the cap 10 is supported by the cap support element 62 in a predefined position.
In the presented case, the predefined position can define an axial orientation as
well as an angular orientation of the cap 10. For example, the rotational alignment
means can engage the aforementioned rotational alignment means 15 of the cap 10. It
should be noted that in case of the usage of the fluid-conveying element 50 as shown
in Fig. 2 with a cap according to the second embodiment, it can be sufficient that
the rotational alignment means 66 defines an axial position of the cap 10. This is
possible as a rotation of the cap would not change a radial position of a lid opening,
such as the first opening 52 of the fluid-conveying element 50 is an annular ring.
[0075] The docking device 60 can further comprise at least one sensor configured to identify
an identification means which indicates a compatibility of the cap with a certain
laboratory fluid container 12. The mentioned identification means 47 can be any feature
of the cap 10. However, in case of the usage of the adapter 42, the identification
means 47 can be arranged at the adapter. For example, the sensor can be configured
to identify identification means 47 as described before with regard to the adapter
42.
1. Cap (10) for closing a laboratory fluid container (12), preferably a sterile laboratory
fluid container (12), comprising:
- a lid (14) having at least one lid opening (22); and
- a septum (16) being arranged adjacent to said lid opening (22) and covering said
at least one lid opening (22),
characterized in that
the cap (10) further comprises a fluid channel (18) having an upper opening (24) in
fluid connection with the septum (16), wherein the fluid channel (18) has a tube portion
(28) adapted to extend into a laboratory fluid container (12) in a state in which
a laboratory fluid container (12) is connected to the cap (10).
2. Cap (10) according to claim 1, characterized in that the cap (10) further comprises a tube seal (30) having at least one tube seal through-hole
(32) adapted to sealingly receive the tube portion (28).
3. Cap (10) according to claim 2, characterized in that the tube seal (30) comprises at least one projecting portion (38) having a peripheral
surface (40), wherein the at least one projecting portion (38) is adapted to extend
into a laboratory fluid container (12) so that the peripheral surface (40) thereof
sealingly contacts an inner wall of a laboratory fluid container (12).
4. Cap (10) according to claim 3, characterized in that the tube seal (30) comprises a plurality of projecting portions (38) each of which
has a peripheral surface (40), wherein the projecting portions differ in their dimensions.
5. Cap (10) according to one of the previous claims, characterized in that the lid (14) has a plurality of lid openings (20) each of which being arranged adjacent
to said septum (16), which covers the plurality of lid openings (20).
6. Cap (10) according to claim 5, characterized in that the tube seal (30) has a plurality of tube seal through-holes (32), wherein at least
two of them, preferably all of them, are associated with two of the plurality of lid
openings (20), preferably with all of the plurality of lid openings (20).
7. Cap (10) according to one of the previous claims, characterized in that the cap (10) further comprises an adapter (42) having first means (44) for engaging
said adapter (42) and the lid (14).
8. Cap (10) according to claim 7, characterized in that the adapter (42) further has second means (46) for engaging said adapter (42) and
a laboratory fluid container (12).
9. Cap (10) according to one of the previous claims, characterized in that said cap (10), preferably the adapter (42) thereof, further has identification means
(47) to indicate compatibility with a certain laboratory fluid container (12).
10. Cap (10) according to one of the previous claims, characterized in that the cap (10) further comprises a fluid-conveying element (50) having a first opening
(52) facing to the lid (14) and overlapping the at least one lid opening (22), and
a second opening (54) being in fluid connection with the upper opening (24) of the
fluid channel (18).
11. Cap (10) according to claim 10, characterized in that, the first opening (52) of the fluid-conveying element (50) extends in a depth direction
from an upper surface (56) of the fluid-conveying element (50) and ends in the second
opening (54).
12. Kit, comprising a cap (10) according to claim 8, and a further adapter, wherein both
of the adapters have first connection means (44) being identical and second connection
means (46) differing from each other.
13. Docking device (60) for receiving a cap, preferably a cap (10) according to one of
the claims 1 to 11, comprising:
- a cap support element (62) configured to support the cap in a predefined position;
and
- a needle retaining means (64) configured to retain at least one needle,
wherein the needle retaining means (64) is configured to align a lid opening of a
lid of the cap with a retained needle in a state in which the cap is in a working
position.
14. Docking device (60) according to claim 13, characterized in that the cap support element (62) is or is arranged at a docking drawer (62) being slidable
between a withdrawn position in which the cap can be inserted in the docking drawer
and said working position.
15. Docking device (60) according to claim 13 or 14, characterized in that the docking device (60) further comprises at least one sensor configured to identify
an identification means which indicates a compatibility of the cap with a certain
laboratory fluid container (12).