Reagent reservoir for fluids
A reagent reservoir for fluids, including a storage chamber connected to a duct for conducting fluid out of, into and/or through the storage chamber. The duct includes a duct section delimited by a substrate and a film joined to the substrate. The duct is sealed and is openable at a predetermined breaking point by deflecting the film. The film also delimits the storage chamber and covers a recess in the substrate which forms the duct section. A sealing wall that seals the duct and is integrally joined to the substrate is placed in the recess. The predetermined breaking point is formed by a breakable joining region between the film and edge portion of the sealing wall facing the film. The dimensions of a peripheral area of the sealing wall, which is formed in the edge portion and runs parallel to the film, determine the surface area of the joining region.
1. A microfluidic reagent reservoir for connection to a further microfluidic device, comprising:
a substrate;
a storage chamber formed in the substrate;
a channel formed in the substrate and connected to the storage chamber, the channel being closed by a barrier;
a foil that delimits the storage chamber and the channel on one side, wherein a contact point between the barrier and the foil forms a predetermined breaking point, wherein the channel opens into an outlet chamber that is widened compared to a cross-section of the channel and that is delimited by the substrate and a cover of the reagent reservoir, the outlet chamber being open on one side to form a socket for plug-in connection to the further microfluidic device.
2. The reagent reservoir according to claim 1 , wherein the storage chamber is further formed by a bulge in the film.
3. The reagent reservoir according to claim 1 , wherein the predetermined breaking point is breakable by deformation of a portion of the film delimiting the storage chamber, wherein the film delimits the storage chamber and the channel continuously as far as a mouth where the channel opens into a discharging and/or mixing chamber.
4. The reagent reservoir according to claim 1 , wherein the film is a laminate composed of a metal layer and at least one plastic layer, wherein the plastic layer is directed toward the fluid.
5. The reagent reservoir according to claim 4 , wherein the metal layer is an aluminum layer.
6. The reagent reservoir according to claim 5 , wherein the aluminum layer is a soft-annealed aluminum layer.
7. The reagent reservoir according to claim 1 , wherein the substrate has a surface area provided for welding to the film, the surface area having a furrowed structure.
8. The reagent reservoir according to claim 1 , wherein the storage chamber, on a side directed away from the film, has opening channels with in each case an attachment stub that is closeable by welding, wherein the attachment stub is arranged in a depression in the substrate and, in a closed state, is set back in relation to a surface of the substrate directed away from the film.
9. The reagent reservoir according to claim 3 , wherein the discharging and/or mixing chamber forms the socket for connecting the reagent reservoir to an appliance.
10. The reagent reservoir according to claim 3 , wherein the substrate is connected to an actuator and/or a lid.
11. The reagent reservoir according to claim 10 , wherein the actuator and/or the lid is connected to the substrate non-releasably and pivotably.
12. The reagent reservoir according to claim 11 , wherein the actuator and/or the lid is connected to the substrate by a film hinge.
13. The reagent reservoir according to claim 10 , wherein the actuator comprises a stamp element guided through an opening in the lid and deforms the portion of the film, and the stamp element, in an end position of the actuator annuls a height of the storage chamber by the deformation.
14. The reagent reservoir according to claim 10 , wherein the lid and/or the actuator, in a end position, are fixable on the substrate and, optionally, the actuator is fixable on the lid.
15. The reagent reservoir according to claim 14 , wherein the actuator is clamped and/or latched onto the substrate or lid.
16. The reagent reservoir according to claim 10 , wherein the lid together with the substrate forms the discharging and/or mixing chamber.
17. The reagent reservoir according to claim 3 , wherein the reagent reservoir is connectable to a carrier element for a dry agent or a sample, and the dry reagent and/or the sample is arranged in the channel or the discharging chamber by the carrier element.