Bag for solid concentrate
The invention relates to a bag ( 1 ) made of a flexible wall, which bag is fitted with an inlet fluid line for introducing dissolution water, and with an outlet fluid line ( 121, 122 ) for extracting a solution obtained. According to the invention, the inside of the bag has a lower edge ( 13 ) in the overall shape of a V, the point of the V being further away from the centre of the bag than the arms of the V, the outlet fluid line opening into the bag as close as possible to the point of the V.
1. A bag made of a flexible wall, the bag having two opposing inner lateral edges, two opposing inner intermediate sections, a lower inner edge, and an upper inner edge, the bag being fitted with an inlet fluid line for introducing dissolution water, and with an outlet fluid line for extracting a solution obtained, wherein
the lower inner edge is in the overall shape of a V,
the V has a point, and two arms with each arm having a top,
the point of the V is further away from the center of the bag than the arms of the V,
the outlet fluid line opens into the bag as close as possible to the point of the V,
each arm extends from the point of the V, to a respective one of the opposing inner intermediate sections,
each inner intermediate section extends from the top of the respective arm to a respective one of the inner lateral edges and comprises a concave shoulder, a constriction nose, an elbow, and a cavity,
in an empty state of the bag, each concave shoulder starts at the top of the respective arm of the V and gives over to the respective constriction nose,
in an empty state of the bag, each constriction nose, in a lower part, assumes and continues the concave shape of the respective shoulder and diverges towards the center of the bag as far as the respective elbow,
each cavity has a rounded shape and extends from the top of the respective arm to the respective elbow, and
the inner width of the bag narrows between the opposing elbows such that the maximum inner width of the bag between the opposing cavities is greater than the inner width of the bag between the opposing elbows.
2. The bag according to claim 1 , wherein the point of the V is rounded.
3. The bag according to claim 1 , wherein, the two arms of the V have a same inclination and/or a joining area between the two arms of the V is located at a center of the lower inner edge.
4. The bag according to claim 1 , wherein an angle (α) between the two arms of the V is between 65° and 75°.
5. The bag according to claim 1 , wherein the arms of the V are obtained by welding the bag onto itself.
6. The bag according to claim 1 , wherein each concave shoulder has a first gradient at a junction with the respective arm of the V, each concave shoulder has a second gradient as the concave shoulder approaches the respective elbow, each arm of the V has a respective gradient, the first gradient is less than the gradient of the respective arm, and the second gradient is steeper than the first gradient and close to vertical.
7. The bag according to claim 1 , wherein the bag is made of two panels joined together via outer edges.
8. The bag according to claim 1 , wherein the upper inner edge has a first end and a second end, and each inner lateral edge connects a respective one of the first end and the second end to a respective one of the inner intermediate sections.
9. The bag according to claim 8 , wherein the bag has a rectangular overall shape that includes short sides and long sides, the point of the V is located in the middle of one of the short sides of the rectangle, the bag extends beyond the lower inner edge, on each side of the V, to an external lower edge that is parallel to the upper inner edge.
10. The bag according to claim 1 , wherein the inlet fluid line opens into the bag opposite the point of the V.
11. The bag according to claim 1 , wherein the outlet fluid line comprises a tube, a first end of the tube is fitted with a filter, and the tube is dimensioned to allow the filter to be positioned as close as possible to the point of the V.
12. The bag according to claim 1 , wherein the bag is fitted with a connector for connecting the bag to a haemodialysis generator, the connector is crossed by the inlet fluid line and a first portion of the outlet fluid line, the first portion is extended by a tube connected to the first portion at a first end of the tube, and the tube is fitted at a second end of the tube, which is opposite the first end, with a filter positioned as close as possible to the point of the V.
13. The bag according to claim 12 , wherein the connector is inserted into an edge of the bag at a distance spaced away from the lower inner edge.
14. The bag according to claim 1 , wherein the bag contains bicarbonate for the production of a saturated solution for dialysis.
15. The bag according to claim 1 , wherein the bag is made of two panels joined together via outer edges by welding.
16. The bag according to claim 8 , wherein the bag has a rectangular overall shape that includes short sides and long sides, the long sides include respective external lateral edges, the point of the V is located in the middle of one of the short sides of the rectangle, the bag extends beyond the lower inner edge, on each side of the V, to an external lower edge that is parallel to the upper inner edge, the point of the V is formed by a weld seam having a weld seam external edge, the external lower edge is at least partially coincident with the weld seam external edge, and the external lateral edges extend to the external lower edge.
17. The bag according to claim 1 , wherein the bag is fitted with a connector for connecting the bag to a haemodialysis generator, the connector is crossed by the inlet fluid line and a first portion of the outlet fluid line, the first portion is located opposite the point of the V, the first portion is extended by a tube connected to the first portion at a first end of the tube, and the tube is fitted at a second end of the tube, which is opposite the first end, with a filter positioned as close as possible to the point of the V.
18. The bag according to claim 12 , wherein the connector is inserted into an external edge of the bag at a distance spaced away from the point of the V, inserted into an upper external edge of the bag opposite the point of the V, or inserted into the wall of the bag at a distance spaced away from the point of the V.