Packaging Bag with Nested Side Folds for Volume Expansion
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Solution Overview
Problem
Existing methods for producing large-volume packaging bags for liquids or powders require significant material expenditure and additional effort for production, storage, and handling, especially when the bags need to be replaced or refilled.
Innovation Solution
A procedure for manufacturing a packaging bag with overlapping side folds that allow for volume enlargement without significant material increase, maintaining the external dimensions and simplifying storage, packaging, and handling by preserving the original packaging bag material dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the packaging bag volume is increased to package large volumes of filling material, then the packaging capacity is improved, but the material expenditure and production effort increase significantly
Solution Approach 1:
The packaging bag is designed with side fold elements that can be nested within the bag body when empty, allowing the bag to be stored in a compact form while providing large volume when deployed and filled with material
Solution Approach 2:
The packaging bag is divided into multiple web elements (first web element, second web element, side fold elements) that can be separately produced and then assembled, allowing efficient production and reducing material waste
2Volume of moving object
If the packaging bag volume is increased to package large volumes of filling material, then the packaging capacity is improved, but the storage and shipping space requirements increase
Solution Approach 1:
The side fold elements are designed to fold back and nest within the bag structure when the bag is empty, reducing the storage volume to a fraction of the expanded bag volume while maintaining full capacity when needed
Solution Approach 2:
The packaging bag transitions from a compact, low-volume state during storage and shipping to a large-volume state during use, with the side fold elements dynamically deployed to create the required packaging volume
3Volume of moving object
If the packaging bag is designed with complex folding structures to increase volume, then the packaging capacity is improved, but the production complexity increases
Solution Approach 1:
The complex folding structure is achieved by dividing the bag into separate web elements and side fold components that are produced independently using standard manufacturing processes, then assembled through straightforward joining operations
Solution Approach 2:
The side fold elements are pre-formed with fold lines and attachment points during web production, so that the final assembly requires only simple joining operations rather than complex real-time folding operations
Data Source
Figure 1a~1b
AI summary
The invention relates to a method for producing a packaging bag (1) and a packaging bag (1) for packaging liquid or granular contents and for arranging it in a packaging bag container. The packaging bag (1) is formed by a top web element (2), a bottom web element (3), and two side gusset elements (6). The top web element (2) is arranged flat on the bottom web element (3) such that the side gusset elements (6) each have a side gusset (7) between the top web element (2) and the bottom web element (3), and that the arrangement of the top web element (2), bottom web element (3), and simply folded side gusset elements (6) forms a flat, multi-layered packaging bag material (5) with a longitudinally extending, approximately centrally located axis of symmetry (8) and a left and a right edge of the packaging bag material.The side fold (7) in the right side fold element (6) is arranged so that it lies between the left edge (17) of the packaging bag material and the central axis of symmetry (8). The side fold (7) in the left side fold element (6) is arranged so that it lies between the right edge (17) of the packaging bag material and the central axis of symmetry (8). The side fold elements (6) are arranged so that they overlap each other in certain areas, with an overlap area (22) located between the left and right edges (17) of the packaging bag material.