Flexible packaging container

Abstract

Disclosed is a flexible packaging container, in particular a plastic film pouch or bag for bulk goods, comprising a front wall (2) and a rear wall (3) as well as a holding space (15) between said walls (2, 3) for goods to be stored; the walls (2, 3) are made at least in part of a film material; the flexible packaging container further comprising an intermediate space (14) which is formed by an inner ply (4) and is separated from the holding space (15) by said inner ply (4); the holding space (15) can be evacuated into the intermediate space (14) via at least one holding space evacuation hole (7) in the inner ply (4), and the intermediate space (14) can be evacuated out of the packaging container (1) via at least one additional evacuation hole (11) that interrupts a transverse seam; the front wall (2) does not comprise any of the longitudinal seam (12) that seals the packaging container (1) in the peripheral direction; the inner ply (4) is formed by a strip (4) which is located on a side of the front wall (2) facing the intermediate space (14) and which is fastened to the front wall (2) using two longitudinal seams extending between top and bottom transverse seams (5.1, 5.2).

Claims

1. A flexible packaging container for bulk goods, the packing container comprising: a front wall and a rear wall; a holding space formed between the front wall and the rear wall for bulk goods; the front wall and the rear wall at least partially formed of a film material; an inner ply formed by a strip arranged on a side of the front wall facing the rear wall; the inner ply having first and second longitudinal edges and being attached to the front wall by two longitudinal seams extending between top and bottom transverse seams of the packaging container along the first and second longitudinal edges of the inner ply, wherein the inner ply and the front wall define an intermediate space separated by the inner ply from the holding space, the inner ply not being attached to the front wall laterally outside of the two longitudinal seams; at least one holding space venting opening arranged in a ply material of the inner ply between the two longitudinal seams and arranged at a spacing from the two longitudinal seams, wherein the at least one holding space venting opening is configured to vent the holding space into the intermediate space; each of the top and bottom transverse seams sealing the front and rear walls together, in which at least a portion of each of the top or bottom transverse seams including an inner ply section where the inner ply is sealed between the front and rear walls; at least one container venting opening interrupting the top transverse seam or the bottom transverse seam in the inner ply section between the inner ply and the front wall, such that no interruption is present in the top or bottom transverse seams other than at the inner ply section, wherein the at least one container venting opening is permanently unsealed to always vent the intermediate space to ambient atmosphere; wherein the rear wall has a longitudinal seam closing the packaging container in a circumferential direction; wherein the front wall has no longitudinal seam closing the packaging container in the circumferential direction and is thereby adapted to include printed-on information and/or advertising that is uninterrupted by a longitudinal seam.

2. The packaging container according to claim 1, wherein the inner ply is a film part that is separated from said film material.

3. The packaging container according to claim 1, wherein the ply material of the inner ply is different from said film material.

4. The packaging container according to claim 3, wherein the ply material of the inner ply is thinner than said film material.

5. The packaging container according to claim 1, wherein the inner ply extends across an entire height of the packaging container and is fixed by the bottom and top transverse seams.

6. The packaging container according to claim 1, further comprising a no-seal strip arranged in the top transverse seam or the bottom transverse seam to form the at least one container venting opening.

7. The packaging container according to claim 1, further comprising a no-seal strip extending from the bottom transverse seam to the top transverse seam to form the at least one container venting opening in the bottom transverse seam and in the top transverse seam.

8. The packaging container according to claim 1, wherein the at least one container venting opening is an unsealed or non-adhesive area of the top transverse seam or of the bottom transverse seam and is continuously open without requiring overpressure.

9. The packaging container according to claim 1, wherein, viewed in a longitudinal direction of the inner ply, the at least one container venting opening and the at least one holding space venting opening are spaced apart from each other.

10. The packaging container according to claim 1, wherein, viewed in a direction transverse to a longitudinal direction of the inner ply, the at least one container venting opening and the at least one holding space venting opening are spaced apart from each other.

11. The packaging container according to claim 1, further comprising at least one spacer spacing apart the inner ply and the front wall.

12. The packaging container according to claim 11, wherein the at least one spacer is formed of the ply material, which is a film material, of the inner ply.

13. The packaging container according to claim 1, further comprising at least one deflecting element preventing a direct connection between the at least one holding space venting opening and the at least one container venting opening.

14. The packaging container according to claim 1, wherein the inner ply is fastened by at least one fixation between the two longitudinal seams and the front wall.

15. A flexible packaging container for bulk goods, the packing container comprising: a front wall and a rear wall; a holding space formed between the front wall and the rear wall for bulk goods; the front wall and the rear wall at least partially formed of a film material; an inner ply formed by a strip arranged on a side of the front wall facing the rear wall; the inner ply having first and second longitudinal edges and being attached to the front wall by two longitudinal seams extending between top and bottom transverse seams of the packaging container along the first and second longitudinal edges of the inner ply, wherein the inner ply and the front wall define an intermediate space separated by the inner ply from the holding space, the inner ply having a width extending between the first and second longitudinal edges that is smaller than a width of the front wall; at least one holding space venting opening arranged in a ply material of the inner ply between the two longitudinal seams and arranged at a spacing from the two longitudinal seams, wherein the at least one holding space venting opening is configured to vent the holding space into the intermediate space; each of the top and bottom transverse seams sealing the front and rear walls together, in which at least a portion of each of the top or bottom transverse seams including an inner ply section where the inner ply is sealed between the front and rear walls; at least one container venting opening interrupting the top transverse seam or the bottom transverse seam in the inner ply section between the inner ply and the front wall, such that no interruption is present in the top or bottom transverse seams other than at the inner ply section, wherein the at least one container venting opening is permanently unsealed to always vent the intermediate space to ambient atmosphere; wherein the rear wall has a longitudinal seam closing the packaging container in a circumferential direction; wherein the front wall has no longitudinal seam closing the packaging container in the circumferential direction and is thereby adapted to include printed-on information and/or advertising that is uninterrupted by a longitudinal seam.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages and details of the invention can be taken from the following figure description. Schematically illustrated, it is shown in:

(2) FIG. 1 a first embodiment of the invention in perspective view;

(3) FIG. 2 the object of FIG. 1 in a cross section approximately at the level of the middle of the object according to FIG. 1;

(4) FIG. 3 a partially broken away front view of the object according to FIG. 1;

(5) FIG. 4 a further embodiment of the invention in perspective view;

(6) FIG. 5 the object of FIG. 4 in a cross section at the middle of the height;

(7) FIG. 6 the object of FIG. 4 in a partially broken-away front view.

DESCRIPTION OF PREFERRED EMBODIMENTS

(8) Individual technical features of the embodiments described in the following can also be combined in combination with afore described embodiments as well as the features of the independent claim and possible further claims to objects according to the invention. Provided that it is meaningful, functionally identically acting elements are provided with identical reference characters.

(9) A flexible packaging container 1 according to FIG. 1 comprises a front wall 2, a rear wall 3 (compare FIG. 2) and an aforesaid inner layer, illustrated in dashed lines, that is embodied as a separate (film) strip 4 which has been supplied in longitudinal direction during the manufacture of the packaging container. At the top and bottom ends, the packaging container is closed by sealed transverse seams 5.1 and 5.2. A no-seal strip 6 (illustrated in FIG. 1 in dashed lines) extends from the top transverse seam 5.1 to the transverse seam 5.2 and is on one side attached to the front layer or to the inner or intermediate ply formed by the film strip 4. Holding space venting openings 7 are spaced apart in an area 8, viewed in transverse direction, from venting openings which are formed by passages in the transverse seam 5.1 or the transverse seam 5.2.

(10) This concerns a repeating pattern-oriented variant of a packaging container 1 in which, by means of a repeating pattern control, an exact positioning of the strip 4 between the transverse seams 5.1 and 5.2 is effected. Embossing lines 9 which can be generated by embossing of the inner ply, form spacers in the intermediate space so that the inner ply 4 and the front wall 2 or the front layer are held at a spacing from each other.

(11) In the embodiment according to FIG. 4 et seq., a strip 4 which is embodied as a film strip is introduced without repeating pattern orientation into a packaging container 1.

(12) The strip 4 is arranged across the entire height of the packaging container 1 between transverse seams 5.1 and 5.2. In contrast to the embodiment according to FIG. 1, a needled area 8 which is provided with venting openings 7 is formed across the entire length of the strip 4. The strip 4 forms the inner ply 4 and is connected by longitudinal seams 13 with the front wall 2 (compare FIGS. 5 and 6). Viewed in longitudinal direction, a no-seal strip 6 is arranged in the left half of the intermediate space and is thus arranged, in a projection onto the plane of the front wall 2, spaced apart from the area 8. Air can be guided across the needled area 8 along spacers formed in the present case as interrupted embossment lines 9 and along fixations 10 of the inner ply with the front wall 2 in the direction of the venting openings 11 present at the end of the no-seal strip 6. In this embodiment, no repeating pattern orientation is thus provided.

(13) The embodiment according to FIG. 1 as well as the embodiment according to FIG. 4 are provided with a front wall 2 and a rear wall 3 which are produced from a flat film connected laterally by a longitudinal seam 12 at the rear of the packaging container 1. The longitudinal seam 12 closes the packaging container 1 in the circumferential direction and is arranged at the rear wall 3. The front wall 2 is thus free of a longitudinal seam 12 that closes the packaging container in circumferential direction.

(14) Both packaging containers have in common that the strip that forms the inner ply 4 is arranged by the longitudinal seams 13 on the inner side of the front wall 2 across the entire height of the packaging container and thus an intermediate space 14 is formed.

(15) Via this intermediate space 14, venting of the holding space 15 which is formed otherwise between front wall 2 and rear wall 3 is realized.