METHOD FOR THE PRODUCTION OF THE FILM TUBE BAG AND THE VERTICAL FORM FILL SEAL PACKAGING MACHINE TO IMPLEMENT THE METHOD

Abstract

A method of a film tube bag production includes shaping longitudinal foldings (6) on packing film (8), and attaching a secondary all-round closure (5) on an inner side (21) of the packing film (8). Its longitudinal axis is perpendicular to the longitudinal axis of the longitudinal foldings (6). The length of the secondary all-round closure (5) corresponds to the size of an inside circumference of the bag (1). The method further includes shaping of the packing film (8) into the form of the film tube, closing the film tube and creating the folded flat quadrilateral bottom (3), and filling the bag and forming the upper cross seam (2).

Claims

1. The method for the production of a film tube bag comprising the following operations: shaping and fixing longitudinal foldings (6) on an outer side (20) of a packing film (8), shaping of the packing film (8) with parallel longitudinal foldings (6) into a form of a film tube, closing of the film tube by a longitudinal seam (7) parallel with the longitudinal foldings (6), forming a folded flat quadrilateral bottom (3) with a lower cross seam (4), filling the bag (1) with packed goods, forming an upper cross seam (2) on a side of the bag (1) opposite the folded flat quadrilateral bottom (3), separating the filled bag (1) from the film tube, after shaping and fixing the longitudinal foldings (6), fixing a secondary closure (5) on an inner side (21) of the packing film (8), which longitudinal axis is perpendicular to a longitudinal axis of the longitudinal foldings (6) prior to shaping the packing film (8) into the film tube, whereas the secondary closure (5) is positioned so that it is located on the finished film tube bag below the upper cross seam (2) where the length of the applied secondary all-round closure (5) corresponds to a size of an inside circumference of the film tube bag (1).

2. The method for the production of the film tube bag according to the claim 1, wherein the secondary all-round closure (5) is formed of a one-piece zipper closure.

3. The method for the production of the film tube bag according to the claim 1, wherein the secondary all-round closure (5) is formed of a double-sided adhesive tape where a side of the tape glued on the inner side of the bag (1) indicates a higher binding property than the other side.

4. The method for the production of the film tube bag according to the claim 1, wherein the secondary all-round closure (5) is formed by a spread of a permanent adhesive.

5. The method for the production of the film tube bag according to claim 2, wherein three longitudinal foldings (6) are formed primarily, and a fourth longitudinal folding (6) is formed by the longitudinal seam (7) formed afterwards.

6. A vertical form fill seal packaging machine according to the method of the film tube bag production of claim 1 comprising: a device (11) for unwinding the packing film (8), where a device (12) is situated behind the device (11) for shaping and fixing longitudinal foldings (6) on the packing film (8); a forming collar (13); a filling tube (14); a longitudinal sealing jaw (15) applicable to the formation of the longitudinal seam (7); a device (19) for feeding the packing film (8) through the forming collar (13), and thereinafter a device (18) for the formation of the flat bottom (3) of the bag (1); a lateral sealing and separating jaws (16) to form a cross seam (2, 4), and applicable to the separation of the filled bag (1); and a device (17) for the application of the one-piece secondary all-round closure (5) on the inner side (21) of the packing film (8) with formed longitudinal foldings (6) located within the space between the device (12) for shaping and fixing the longitudinal foldings (6) and the forming collar (13).

7. The method for the production of the film tube bag according to claim 3, wherein three longitudinal foldings (6) are formed primarily, and a fourth longitudinal folding (6) is formed by the longitudinal seam (7) formed afterwards.

8. The method for the production of the film tube bag according to claim 4, wherein three longitudinal foldings (6) are formed primarily, and a fourth longitudinal folding (6) is formed by the longitudinal seam (7) formed afterwards.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0023] Exemplary implementation of the submitted invention shall be described with reference to drawings where the below mentioned figures show the details of

[0024] FIG. 1 The film tube bag with a flat bottom, secondary closure and longitudinal reinforcing foldings;

[0025] FIG. 2 The layout of the vertical form fill seal packaging machine with the device for an application of the secondary closure.

BEST MODE FOR CARRYING OUT THE INVENTION

[0026] Exemplary method for the film tube bag 1 production comprises the following sequential consecutive operations:

[0027] Shaping and fixing three longitudinal foldings 6 on the outer side of the packing film 8;

[0028] Attaching the all-round secondary closure 5, which longitudinal axis is perpendicular to the longitudinal axis of longitudinal foldings 6 on the inner side of the packing film 8. The all-round secondary closure 5 is situated in the way that it is placed inside the finished bag below the upper cross seam 2. In this case, the secondary closure 5 is formed by a one-piece zipper closure and the length of the applied secondary all-round closure 5 corresponds with the size of the bag inside circumference;

[0029] Shaping of the packing film 8 together with the parallel longitudinal foldings 6 into the form of the film tube;

[0030] Closing of the film tube with the longitudinal seam 7 parallel with longitudinal foldings 6. In this case, the longitudinal seam 7 is located in one of the corners of the bag 1, and it forms the fourth longitudinal folding 6, simultaneously;

[0031] Forming the folded flat quadrilateral bottom 3 together with the lower cross seam 4;

[0032] Filling the bag 1 with the packed goods;

[0033] Forming the upper cross seam 2 on the side of the bag 1 opposite the folded flat quadrilateral bottom 3,

[0034] Separating the filled bag 1 from the film tube.

[0035] The vertical form fill seal packaging machine used for the above described method for the film tube bag production comprises the device 11 for the unwinding the packing film 8 followed by the device 12 for welding longitudinal foldings 6 on the packing film 8. Thereinafter, another device 17 shall be integrated in the machine with the aim to apply a one-piece secondary all-round closure 5 on the packing film 8 with formed longitudinal foldings 6. It is followed by the forming collar 13, filling tube 14 and the longitudinal sealing jaw 15 forming the longitudinal seam 7 and the device 19 for the packing film 8 feed and then the device 18 for forming the flat bottom 3 of the bag 1 as well as the lateral sealing and separating jaws 16 to manufacture the cross seam 2, 4, and to separate the filled bag 1.

[0036] Exemplary embodiment shall be depicted in FIG. 1 and FIG. 2.

LIST OF REFERENCE NUMBERS

[0037] 1Bag [0038] 2Upper Seam [0039] 3Bottom [0040] 4Lower Seam [0041] 5Secondary All-round Closure [0042] 6Longitudinal Folding [0043] 7Longitudinal Seam [0044] 8Packing Film [0045] 11Device for Packing Film Unwinding [0046] 12Device for Shaping and Fixing Longitudinal Foldings [0047] 13Forming Collar [0048] 14Filling Tube [0049] 15Longitudinal Sealing Jaw [0050] 16Lateral Sealing and Separating Jaws [0051] 17Device for the Application of One-piece Secondary All-round Closure [0052] 18Device for the Flat Bottom Formation [0053] 19Device for the Packing Film Feed [0054] 20Outer Side of the Packing Film [0055] 21Inner Side of the Packing Film