VFFS/HFFS Packaging with Opening Aid on the Longitudinal Seam
a longitudinal seam and opening aid technology, applied in packaging, transportation and packaging, and successful articles, etc., can solve the problems of longitudinal seam generation scrap in the vffs/hffs process, uncontrolled tear in the extrusion direction of plastic film, and inconvenient operation of teeth structur
Inactive Publication Date: 2011-04-28
AMCOR FLEXIBLES EURO
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AI Technical Summary
Benefits of technology
This solution enables a 10% reduction in packaging material usage by eliminating unnecessary length and ensures predictable opening, while maintaining packaging speed and providing tamper evidence through controlled tear initiation.
Problems solved by technology
The opening of the pack at the top of such a VFFS / HFFS packaging including a teeth structure as opening initiations, as mentioned above, often leads to uncontrolled tear in the extrusion direction of the plastic film (machine direction).
Furthermore, this kind of opening initiation on the longitudinal seam generates scrap in the VFFS / HFFS process because material is removed.
Nevertheless, the teeth structure is not a continuous and uninterrupted structure.
Furthermore, the incisions have to be achieved during the VFFS / HFFS process, again slowing down the packaging speed.
Method used
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[0030]The present invention discloses a VFFS / HFFS packaging with a continuous teeth structure present at least on the longitudinal seam of said packaging. The expression “continuous teeth structure” should be understood as substantially non-interrupted “V-shaped” incisions also called adjacent notches or adjoining notches as shown on the different figures relating to the present invention. The expression “adjoining notches” or “adjacent notches” are indistinctly used in the text.
[0031]Such a teeth structure is created simultaneously with the cutting of the extrusion film into the right width for the packaging machine reels. The first side of the film cut in a “V-shape” representing the counterpart of the second side, in such a way that no horizontal cutting lines remain, allowing a scrap-free cutting (see FIG. 8). In U.S. Pat. No, 5,409,115, the cutting leaves cutting lines that are parallel to the seam, which does not allow the tear of the film at any place. Furthermore, the cuttin...
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Abstract
The present invention is related to a vertical / horizontal form, fill and seal packaging comprising a plastic film, a longitudinal seam (2) and a cross-directional seam (5), characterised in that the longitudinal seam (2) comprises a continuous teeth structure of adjacent notches (1) with no remaining horizontal cutting lines, representing tear initiations over the whole length of the longitudinal seam (2) said packaging being obtained by a machine reel (4) of said plastic film comprising on both lateral edges said continuous teeth structure (1) in order to avoid additional scrap in the VFFS / HFFS packaging process.The present invention is also related to a process of making such a packaging, said process starting out from a reel comprising a continuous teeth structure on its lateral edges.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation application of U.S. patent application Ser. No. 11 / 579,437, filed Nov. 2, 2006, currently pending, and claims priority to PCT Patent Application No. PCT / BE2005 / 000024, filed Feb. 17, 2005 and to EP Patent Application No. 04447113.4, filed May 5, 2004, the entire contents of each of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to flexible packaging and in particular to vertical and horizontal form, fill and seal packaging (VFFS / HFFS) with a continuous teeth structure on the longitudinal seam of said packaging.STATE OF THE ART[0003]VFFS / HFFS packaging machine reels exhibit in the extrusion direction of the plastic film uncontrolled tear behaviour and the tear tends to continue in the extrusion direction. The majority of VFFS / HFFS packagings are positioned in a way that the length of the pack is parallel to the extrusion direction of the film. T...
Claims
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IPC IPC(8): B65B9/00B65B9/20B65B61/02B65B61/18B65D75/58
CPCB65B9/20B65B61/02B65D75/5827B65B2220/06B65B61/18
Inventor DAELMANS, EDDYVERBEECK, BART
Owner AMCOR FLEXIBLES EURO