초록 ▼

A self standing bag having two side wall sheets and a bottom sheet. To flatten the bag, the bottom sheet is sandwiched between the two side wall sheets and symmetrically folded along a line parallel to its bottom edge, separating the bag into a four-layer part and a two-layer part. In the two-layer

A self standing bag having two side wall sheets and a bottom sheet. To flatten the bag, the bottom sheet is sandwiched between the two side wall sheets and symmetrically folded along a line parallel to its bottom edge, separating the bag into a four-layer part and a two-layer part. In the two-layer part, the bag includes first sloped sealing lines extending between a first two points on the top edges of the side wall sheets and spaced from the vertical side wall edges by a first distance, to a second two points spaced from the vertical edges of the side wall sheets by a second distance less than the first distance. The four-layer part includes second sloped sealing lines extending between the second two points and a third two points on the bottom edges of the side wall sheets.

대표청구항 ▼

1. A self-standing bag filled with a liquid dialysate for making dialysate for a dialysis treatment comprising: a self-standing bag made of two flexible elastomeric rectangular side wall sheets, each side wall sheet having horizontal top and bottom edges and two vertical edges, and one flexible elas

1. A self-standing bag filled with a liquid dialysate for making dialysate for a dialysis treatment comprising: a self-standing bag made of two flexible elastomeric rectangular side wall sheets, each side wall sheet having horizontal top and bottom edges and two vertical edges, and one flexible elastomeric rectangular bottom wall sheet having two horizontal edges and two vertical edges;said two rectangular side wall sheets being sealed to one another along their vertical edges in a lateral two-layer part of said bag;the two vertical edges of said bottom wall sheet being sealed to adjacent vertical edge parts of said side wall sheets and said two horizontal edges of said bottom wall sheet being sealed to adjacent horizontal bottom edges of the side wall sheets in a lateral four-layer part of the bag, said sealing of the side wall sheets to each other and to the bottom wall sheet defining a maximum sealed volume of an interior of said bag;the bag when empty capable of a flat configuration in which the bottom wall sheet is sandwiched between the two side wall sheets, the bottom wall sheet is symmetrically single-folded parallel to the bottom wall sheet horizontal edges, and the horizontal edges of the bottom wall sheet coincide with the horizontal bottom edges of the two side wall sheets, the bag when empty and in the flat configuration thus having a line separating said lateral four-layer part and said lateral two-layer part;said bag further including first sloped sealing lines on each side of the bag joining the side wall sheets in the lateral two-layer part between first points (A′, A″) on the horizontal top edges of the side wall sheets, that are recessed by a first distance (a) from the sealed vertical edges of the side wall sheets, and second points (B′, B″) that are recessed by a second distance (b) from the sealed vertical edges of the side wall sheets and that are positioned on the line separating the lateral two-layer part from the lateral four-layer part, the second distance being less than the first distance, said first sloped sealing lines reducing the maximum sealed volume of said bag interior;said bag still further including second sloped sealing lines joining each side wall sheet and the neighbouring bottom wall sheet in the lateral four-layer part on each side of the bag, between third points (C1′, C1″; C2′, C2″) on the horizontal bottom edges of the side wall sheets, that are recessed by a third distance (c) from the sealed vertical edges of the side wall sheets and the second points (B′, B″), said second sloped sealing lines further reducing the maximum sealed volume of said bag interior; anda liquid dialysate including 3 to 8 liters of an acidic part of liquid dialysate concentrate contained within said bag. 2. The self-standing bag according to claim 1, wherein a connector part is sandwiched between the two horizontal top edges, and the two horizontal top edges and the connector part are joined by a seal. 3. The self-standing bag according to claim 1, wherein the vertical edges of the side wall sheets are joined by seals in the lateral two-layer part. 4. The self-standing bag according to claim 1, wherein the vertical edges of the bottom wall sheet are joined with the neighbouring parts of the side wall sheets by seals. 5. The self-standing bag according to claim 1, wherein the horizontal edges of the bottom wall sheet are joined with the neighbouring horizontal bottom edges of the side wall sheets by seals. 6. The self-standing bag according to claim 1, wherein the side-wall sheets and the bottom wall sheet are made from a single web, and the horizontal bottom edges of the side wall sheets and the bottom wall sheet are made by folding the web along the horizontal edges. 7. The self-standing bag according to claim 1, wherein the second points (B′, B″) are recessed from the vertical edges of the side wall sheets and the bag further includes horizontal sealing lines between the second points (B′, B″) and the neighbouring vertical edges of the side wall sheets along the line separating the lateral two-layer part from the lateral four-layer part thus joining all four layers along the further horizontal sealing lines. 8. The self-standing bag according to claim 1, wherein the bag includes third sloped sealing lines or each side of the bag between the third points (C1′, C1″; C2′, C2″) and fourth points (D1′, D1″; D2′, D2″) on the vertical edges of both the side wall sheets and the bottom wall sheet in the lateral four-layer part joining only the bottom wall sheet and the neighbouring side wall sheet, the fourth points (D1′, D1″; D2′, D2″) being recessed from the horizontal edges of the side wall sheets by a fourth distance (d). 9. The self-standing bag according to claim 8, wherein the bag includes fourth sloped sealing lines on each side of the bag between the second (B′, B″) and the fourth (D1′, D1″; D2′, D2″) points joining only the bottom wall sheet and the neighbouring side wall sheet. 10. The self-standing bag according to claim 9, wherein the sheet material of the bottom wall sheet in the area between the fourth sloped sealing lines and the vertical edges has been removed on each side of the bag and both side wall sheets are directly joined in this area. 11. The self-standing bag according to claim 1, wherein the bag includes fourth sloped sealing lines on each side of the bag between the second points (B′, B″) and fourth points (D1′, D1″; D2′, D2″) on the vertical edges of both the side wall sheets and the bottom wall sheet in the lateral four-layer part joining only the bottom wall sheet and the neighbouring side wall sheet, the fourth points (D1′, D1″; D2′, D2″) being recessed from the horizontal edges of the side wall sheets by a fourth distance (d). 12. The self-standing bag according to claim 11, wherein the sheet material of the side wall sheets and the bottom wall sheet in the corner areas below the second sloped sealing lines and below cutting edges that lead from the fourth points (D1′, D1″; D2′, D2″) to fifth points (E1′, E1″; E2′, E2″) on the second sloped sealing lines is removed, the fifth points (E1′, E1″; E2′, E2″) being recessed from the horizontal edges of the side wall sheets by a fifth distance (e). 13. The self-standing bag according to claim 12, wherein the bag includes fifth sloped sealing lines on each side of the bag between the fourth points (D1′, D1″; D2′, D2″) and the fifth points (E1′, E1″; E2′, E2″) joining only the bottom wall sheet and the neighbouring side wall sheet at the cutting edges. 14. The self-standing bag according to claim 11, wherein the sheet material of the bottom wall sheet in the area between the fourth sloped sealing lines and the vertical edges has been removed and both side wall sheets are directly joined in this area. 15. The self-standing bag according to claim 1, wherein the first sloped sealing lines are at least partly peel seams that are adapted to absorb excessive pressure in the bag. 16. The self-standing bag according to claim 1, wherein the first sloped sealing lines are at least partly interrupted providing a connection between the interior of the bag and top side flap chambers separated from the interior by the first sloped sealing lines. 17. The self-standing bag according to claim 1, wherein the bottom wall sheet is made of more than one layer and wherein a first outer layer and a second outer layer are made of different materials. 18. The self-standing bag according to claim 17, wherein one of the first outer layer and the second outer layer of the bottom wall sheet and one of the side wall sheets or at least a first outer layer and a second outer layer of the side wall sheets facing each other are made of the same material. 19. The self-standing bag according to claim 18, wherein the same material is polyethylene. 20. The self-standing bag according to claim 19, wherein the other outer layer of the bottom wall sheet is made of polypropylene or polyamide. 21. A self-standing bag filled with a liquid dialysate for making dialysate for a dialysis treatment, said self-standing bag made of two flexible elastomeric rectangular side wall sheets, each side wall sheet having horizontal top and bottom edges and two vertical edges, and one flexible elastomeric rectangular bottom wall sheet having two horizontal edges and two vertical edges; said two rectangular side wall sheets being sealed to one another along their vertical edges in a lateral two-layer part of said bag;the two vertical edges of said bottom wall sheet being sealed to adjacent vertical edge parts of said side wall sheets and said two horizontal edges of said bottom wall sheet being sealed to adjacent horizontal bottom edges of the side wall sheets in a lateral four-layer part of the bag, said sealing of the side wall sheets to each other and to the bottom wall sheet defining a maximum sealed volume of an interior of said bag;the bag when empty capable of a flat configuration in which the bottom wall sheet is sandwiched between the two side wall sheets, the bottom wall sheet is symmetrically single-folded parallel to the bottom wall sheet horizontal edges, and the horizontal edges of the bottom wall sheet coincide with the horizontal bottom edges of the two side wall sheets, the bag when empty and in the flat configuration thus having a line separating said lateral four-layer part and said lateral two-layer part;said bag further including first sloped sealing lines on each side of the bag joining the side wall sheets in the lateral two-layer part between first points (A′, A″) on the horizontal top edges of the side wall sheets, that are recessed by a first distance (a) from the sealed vertical edges of the side wall sheets, and second points (B′, B″) that are recessed by a second distance (b) from the sealed vertical edges of the side wall sheets and that are positioned on the line separating the lateral two-layer part from the lateral four-layer part, the second distance being less than the first distance, said first sloped sealing lines reducing the maximum sealed volume of said bag interior;said bag still further including second sloped sealing lines joining each side wall sheet and the neighbouring bottom wall sheet in the lateral four-layer part on each side of the bag, between third points on the horizontal bottom edges of the side wall sheets, that are recessed by a third distance (c) from the sealed vertical edges of the side wall sheets and the second points (B′, B″), said second sloped sealing lines further reducing the maximum sealed volume of said bag interior; andsaid bag yet further including horizontal sealing lines between the second points (B′, B″) and the neighbouring vertical edges of the side wall sheets along the line separating the lateral two-layer part from the lateral four-layer part, thus joining all four layers along the further horizontal sealing lines. 22. A self-standing bag filled with a liquid dialysate for making dialysate for a dialysis treatment, said self-standing bag made of two flexible elastomeric rectangular side wall sheets, each side wall sheet having horizontal top and bottom edges and two vertical edges, and one flexible elastomeric rectangular bottom wall sheet having two horizontal edges and two vertical edges, the bag when empty capable of a flat configuration in which the bottom wall sheet is sandwiched between the two side wall sheets, the bottom wall sheet is symmetrically single-folded parallel to the bottom wall sheet horizontal edges, and the horizontal edges of the bottom wall sheet coincide with the horizontal bottom edges of the two side wall sheets, the bag when empty and in the flat configuration thus having a line separating a lateral four-layer part and a lateral two-layer part; said bag further including first sloped sealing lines on each side of the bag joining the side wall sheets in the lateral two-layer part between first points (A′, A″) on the horizontal top edges of the side wall sheets, that are recessed by a first distance (a) from the vertical edges of the side wall sheets and second points (B′, B″) that are recessed by a second distance (b) from the vertical edges of the side wall sheets and that are positioned on the line separating the lateral two-layer part from the lateral four-layer part, the second distance being less than the first distance;said bag still further including second sloped sealing lines joining each side wall sheet and the neighbouring bottom wall sheet in the lateral four-layer part on each side of the bag, between third points on the horizontal bottom edges, that are recessed by a third distance (c) from the ends of the horizontal bottom edges of the side wall sheets, and the second points (B′, B″); andsaid bag yet further including fourth sloped sealing lines on each side of the bag between the second points (B′, B″) and fourth points (D1′, D1″; D2′, D2″) on the vertical edges of both the side wall sheets and the bottom wall sheet in the neighbouring side wall sheet, the fourth points (D1′, D1″; D2″, D2″) being recessed from the horizontal bottom edges of the side wall sheets by a fourth distance (d). 23. The self-standing bag according to claim 22, wherein the sheet material of the side wall sheets and the bottom wall sheet in the corner areas below the second sloped sealing lines and below cutting edges that lead from the fourth points (D1′, D1″; D2′, D2″) to fifth points (E1′, E1″; E2′, E2″) on the second sloped sealing lines is removed, the fifth points (E1′, E1″; E2′, E2″) being recessed from the horizontal bottom edges of the side wall sheets by a fifth distance (e). 24. The self-standing bag according to claim 23, wherein the bag includes fifth sloped sealing lines on each side of the bag between the fourth points (D1′, D1″; D2′, D2″) and the fifth points (E1′, E1″; E2′, E2″) joining only the bottom wall sheet and the neighbouring side wall sheet at the cutting edges. 25. The self-standing bag according to claim 22, wherein the sheet material of the bottom wall sheet in the area between the fourth sloped sealing lines and the vertical edges has been removed and both side wall sheets are directly joined in this area.