Patent EA-000936-B1 (EA)
Title: Sealed chamber, method for making and packing liquid in said chambers
Inventor: SAINT-SAUVEUR XAVIER DE
IPC: B65B3/02
Filed: 1997-12-19
Abstract: 1. A bag for packing liquid formed by a plastic film comprising a sealed chamber (30) for the liquid and a pocket (15, 33) adjacent to this chamber in which is located a conduit (21) for drawing the liquid, a means (4) being arranged for reaching inside said pocket (15, 33), an opening (7) is formed through a part of the wall of said pocket (15, 33), adjacent to the chamber (30) for the drawing conduit (21) to penetrate the chamber (30) in a sealed manner, characterized in that said opening (7) is located at the end of a tubular element (7a) with decreasing cross-section at the point where the section is smallest wherein said tubular element is made from a plastic film (3, 35) forming a wall of the pocket (15, 33) adjacent to the chamber (30) for the drawing conduit (21) to penetrate the chamber (30), wherein the cross section of said conduit, being at least equal to the section of said opening (7) and is designed for forming a sealing joint around the drawing conduit (21). 2. The bag as claimed in claim 1, characterized in that said means being arranged for reaching inside said pocket (15, 33) is made as a petal (4) cut from one of film layers (1) designed for forming the chamber (30), wherein said petal (4), excluding the free end (4a), is fastened to one film layers (3, 35), forming said pocket (15, 33) enabling to form a coupling, passing exactly around the petal periphery.  3. The bag as claimed in claim 1 or 2, characterized in that comprises the first film layer (1), forming one of the chamber (30) walls, and the second film layer (35), wherein two edges of said first and second layers (1, 35) adjacent to each other and the opposite edge of the second layer (35) is located much closer to those adjacent edges than the opposite edge of the first layer (1), the third film layer (36) covers the second layer (35), wherein one of its edges is levelled towards the edges of the first and second film layers (1, 35), the second and third layers(35, 36) are fastened to each other along free edge of the second layer (35) enabling to form the bottom (38) of the pocket (15, 33), the opposite edge of the third layer (36) towards adjoining to one another edges extends behind the bottom (38) of the pocket (15, 33) and also comprises the fourth film layer (37), the both edges of which coincide with the edges of the third layer (36) thus covering the third layer, wherein these third and fourth layers(36, 37)are fastened to each other between said bottom (38) of said pocket (15, 33) and their edges which extend behind the bottom(38) along two not crossing lines (11) forming a passage (12) the axial line of which is about perpendicular to the bottom (38), wherein this passage(12) is designed enabling to communicate from one side with said opening (7) and from the other side with an internal portion of the chamber (30), and the passage walls (12) are designed so that can move aside towards the conduit for the drawing of liquid and move together when the conduit is absent thus controlling passing the liquid in the passage, and additionally comprises the fifth film layer (1) forming the second chamber wall fastened by periphery of said first film layer. 4. The bag as claimed in claim 1 or 2, characterized in that comprises a passage (12) made from both sides and designed for controlling liquid flow between the inner space and outer surface of a bag, wherein said passage is formed between two adjacent to each other film layers (2) made of plastic, which stick to each other along two not crossing connecting lines (11), wherein the passage can open when extending film layers (2) in different directions and between them insert two adjacent to each other film layer (3) which are formed of the same film made of plastic and folded in half overlapping each other parts, the length of which in the direction perpendicular to the axis line of fold, is much shorter than the corresponding length of the two first film layer (2), whilst the other end of the passage (12) adjoins the fold (3a) and said tubular element of conical shape (7a) is formed laterally to said fold introducing it into the passage way (12), adjacent to this fold (3a). 5. The bag as claimed in claim 4, characterized in that the wall (1) is formed by folding the film (1) overlapping its parts towards the axial line parallel to the axial line (3a) towards which folding of second pair (3) of films is carried out. 6. The bag as claimed in claim 5, characterized in that two film layers (2,3) are formed  from one sheet folded towards three parallel axial lines. 7. The bag as claimed in claim 4, characterized in that a common sheet is formed as a tube. 8. The bag as claimed in any one of the preceding claims, characterized in that the pocket (15) is divided into a plurality of compartments (31, 32, 33). 9. A method for making a bag and continuous packing of liquid in such bags, as claimed in any one of the preceding claim using a plastic film in the form of a band, characterized in that band-cut film moves longitudinally and that the bottom of the pocket (15, 33) is formed between two band-cut film layers sticking two band-cut film layers to each other (35, 36) or folding longitudinally a band-cut film layer (3), wherein two band-cut film layers(1) have much greater width compared to the pocket (15, 33) depth and designed to form the chamber (30), they are superimposed on to pocket (15, 33) , and one of their corresponding edges align with the edges of the pocket (15, 35) opening so that to provide an access between these film layers (3, 35. 36) in lateral direction, and also by that said layers move downwards vertically, film layers (3, 35, 36) forming the pocket(15, 33) move apart towards each other and form tubular seal (7a) and an opening (7) pricking it through the part pocket wall (3, 36) adjacent to the chamber, a drawing conduit (21) for drawing liquid from the chamber (30) is inserted so as to prick through that tubular seal (7a), form two connecting lines (24, 25) substantially perpendicular to the folding line (3a) or to the connecting line (38) of the pocket walls (3, 35, 36) from each side of said drawing conduit (21) for drawing the liquid on the portion between this fold (3a) or between this connecting line (38) and that edge of said film strip, where different film layers (1, 3, 35, 36) are connected to each other, wherein these two connecting lines (24, 25) provide connection together film layers (3, 35, 36), forming the pocket, with the film layer (1), forming the chamber wall provided with a means (4) for securing an access  inside said pocket, all the film layers (1, 3, 35, 36) further stick from one side laterally (28) to said film strip along lower edge of the bagwhen fiilingit, and, from the other side along two longitudinal edges (26, 27) of the film strip to form the chamber (30), upper edge (29) of which is left poen, after which the chamber is filled through that poen edge and the bag is sealed, connecting all its layers laterally along the upper edge (29) of this chamber (30). 10. The method of claim 9, characterized in that the pocket is formed by applying the second band-cut film layer (35) over the first layer (1) forming one of the chamber walls, wherein two longitudinal edges of this first layer(1) and the second layer (35)adjoin one another, the width of this second layer(35) corresponds to the pocket depth, the third band-cut film layer (36), having a greater width, is applied above the second layer (35), two layers (35, 36), forming the pocket, stick to each other in the longitudinal direction of the band-cut film, approximately along the edge of the narrowest layer (35) corresponding to the bottom of the pocket, then further apply the fourth band-cut film layer (37), having the same width as the third layer (36), said third layer (36) and said fourth layer(37) are stick together by said lateral tying (38), forming the pocket bottom, and by its edges extending beyond  the pocket bottom, along two not crossing lines (11) forming a passage (12), an axial line of which is about perpendicular to the lateral tying (38), and further apply the fifth layer (1), forming the second wall of the chamber (30). 11. The method of claim 9, characterized in that three film strips (1, 2, 3) are applied on each other, wherein the first strip (1) is designed for forming the chamber wall (30), the second strip (2) is designed for forming the passage (12) with a valve (12a) controlling the liquid flow, and the third strip (3) designed for closing the passage (12) of the valve (12a), wherein the width of the third strip (3) is much less than the width of the second strip (2),  one of the corresponding longitudinal edges of each applied to each other strips (1, 2, 3) align with the rest of such edges, the second strip (2) and the third strip (3) are folded interimposing one part of each of them on the other so that their other corresponding longitudinal edges are applied on the three corresponding longitudinal edges, which are aligned to each other earlier, in the result of which the third strip (3) in the folded state is enclosed between two superimposed halves of the second strip (2) within limits of its width, the edges (11) of the passage (12) are fixed to that part of the second strip (2) in the folded state, which is not superimposed by the third strip (3) folded and superimposing of one its part on the other, and simultaneously with this stick to each other the edges of the second (2) and third (3) strips superimposed on each other when folding these strips, and make a cut-in on the passage (12) near its end adjacent to the fold (2a) of said second strip (2). 12. The method of claim 11, characterized in that prior to folding the second (2) and the third (3) film strips three strips (1, 2, 3) are welded together in the zone (10) overlapping with the petal (4), leaving within this zone an unwelded portion (10a) lying opposite to the free end (4a) of petal (4). 1