Foil Package Corner Sealing and Reclosure Mechanism
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Solution Overview
Problem
Existing form, fill, and seal machines struggle to produce packages with both corner seals for increased shape stability and reclosable features, as applying reclosable closing elements on a flat foil web complicates corner seal formation.
Innovation Solution
A device and method that apply elongate closing elements perpendicular to the foil web after forming corner seals, ensuring the closing elements cross at least some seams, allowing for reliable corner seal formation and reclosure capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reclosable closing elements are applied to a flat foil web before corner seal formation, then reclosure capability is achieved, but corner seal formation becomes complicated and unreliable
Solution Approach 1:
The corner seals are formed in advance on the flat foil web before the web is formed into a tube shape. This preliminary formation of corner seals ensures they are created on a stable, flat surface, avoiding complications that would arise if seals were attempted after tube formation. The closing elements are then applied to the already-formed corner seals, maintaining both reliability and reclosure capability.
Solution Approach 2:
Instead of applying closing elements to a flat web and then forming corner seals (which causes complications), the invention inverts the sequence: corner seals are first formed on the flat web, and then closing elements are applied to these pre-formed seals. This reversal of the conventional sequence eliminates the technical problems associated with trying to form seals on or around applied closing elements.
2Stability of the object's composition
If corner seals are formed on a flat foil web, then shape stability is improved, but subsequent tube formation and sealing becomes complicated
Solution Approach 1:
Corner seals are formed in advance on the flat foil web while it is still in a stable, two-dimensional state. This preliminary action allows the corner seals to be created with proper folding and attachment without the geometric constraints of tube formation. Once the corner seals are established on the flat web, the web can then be formed into a tube shape with the pre-formed seals already in place, simplifying the overall process.
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
The present invention provides a device for packaging products in a foil package. The device comprises corner forming means for forming a number of folded and attached-together sections of foil material in a foil web, which sections extend outwardly in the longitudinal direction of the foil web, which sections each form a seam on the inner side of the foil web, packaging means, and transport means for transporting the foil web from a supply roll along the corner forming means and along the packaging means, respectively. The device further comprises application means for applying elongate closing elements perpendicular to the longitudinal direction of the web to the inner side of the web, wherein the application means are provided between the corner forming means and the shaping means and are adapted to apply the elongate closing elements such that the closing elements cross at least some of the seams formed in the foil web by the corner forming means.