Composite Package Sleeve Geometry for Wrinkle-Free Gable Spouts
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Solution Overview
Problem
Packages with curved gable surfaces experience wrinkles and unevenness, making it difficult to apply spouts and closure elements effectively.
Innovation Solution
The sheet-like composite material is designed with a maximum perpendicular distance of 5 mm or less between the straight front axis and the curved front edge of the gable surface, ensuring reduced stress and minimizing wrinkles, while maintaining sufficient gable surface area for larger closure elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the front edge of the gable surface is curved outwards to increase surface area for larger closure elements, then the gable surface area is improved, but wrinkles and unevenness occur on the gable surface
Solution Approach 1:
The patent applies parameter changes by limiting the maximum perpendicular distance between the straight front axis and the curved front edge to 5 mm or less. This quantitative constraint on the curvature parameter resolves the contradiction by preventing excessive curvature that causes wrinkles while still allowing sufficient surface area expansion for larger closure elements.
2Shape
If curved fold lines are used to create curved edges, then the aesthetic appeal and technical functionality are improved, but the manufacturing complexity increases
Solution Approach 1:
The patent simplifies manufacturing by changing the fold line geometry from curved to straight lines that intersect at defined angles. This parameter change in the fold line design allows curved package edges to be achieved through simple angular folds rather than complex curved folding paths, reducing manufacturing complexity while maintaining the desired curved shape.
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
Sheet-like composite material (1) for manufacturing a package (15) and package sleeve (13) made of a composite material (1) for manufacturing a package (15) comprising: - a sleeve surface (3), wherein the sleeve surface (3) comprises a front surface and a rear surface, - base surfaces (5), wherein the base surfaces (5) comprise triangular base surfaces (5T) and quadrangular base surfaces (5Q), and - gable surfaces (6), wherein the gable surfaces (6) comprise triangular gable surfaces (6T) and quadrangular gable surfaces (6Q, 6CQ), - two secondary fold lines (7), which run parallel to one another through the sleeve surface (3), and - a longitudinal seam (14), which connects two edge regions of the composite material (1) to form a circumferential package sleeve (13), which is open both in the region of the base surfaces (5) and in the region of the gable surfaces (6), - wherein the base surfaces (5) and the gable surfaces (6) are arranged on opposite sides of the sleeve surface (3), - wherein the package sleeve (3) is folded along both secondary fold lines (7), - wherein central quadrangular gable surface (6CQ) has a front edge (9) which adjoins the sleeve surface (3) and which is curved at least in sections, and - wherein the central quadrangular gable surface (6CQ) has a straight front axis (10) that connects the two front corner points (GF) of the central quadrangular gable surface (6CQ), wherein the maximum perpendicular distance (12) between the straight front axis (10) and the curved front edge (9) is 5 mm or less, preferably 4 mm or less, more preferably 3,5 mm or less. Package (15) made of a composite material (1) wherein the package (15) is manufactured from the above sheet-like composite material (1) or package sleeve (13).