Windowed Packaging Material via Non-Linear Subweb Segmentation
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Solution Overview
Problem
Existing methods for creating windowed flexible packaging materials, such as those used in VFFS and HFFS machines, generate significant waste and require handling of a waste stream, which is undesirable.
Innovation Solution
A method involving cutting a web of packaging material along a non-linear path to form subwebs with protruding and recessed edges, then repositioning and adhering these subwebs to create windowed packaging material without waste, using techniques like welding or adhesive application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If die cutting or laser cutting is used to remove predetermined portions of packaging material to create windows, then windows can be formed in the packaging material, but significant waste is generated and a waste stream must be handled
Solution Approach 1:
The packaging material web is segmented into multiple subwebs by cutting along a non-linear path, creating protruding and recessed portions that are then reconfigured to form windows. This segmentation allows the material to be rearranged without removing any portions, eliminating waste while achieving the window formation objective.
Solution Approach 2:
Instead of removing material to create windows (subtraction approach), the invention inverts the approach by rearranging and reconfiguring the material itself through non-linear cutting and subweb repositioning. The windows are formed by the geometric arrangement of subwebs rather than by material removal, completely eliminating waste generation.
2Adaptability or versatility
If windows are formed by removing predetermined portions of packaging material, then transparent or breathable windows are created, but the process generates a waste stream that requires handling
Solution Approach 1:
The invention inverts the traditional window formation approach by not removing material but rather by reconfiguring the material web through non-linear cutting and subweb repositioning. This creates windows through geometric arrangement rather than subtraction, eliminating the waste stream problem while maintaining adaptability for transparent or breathable window applications.
Solution Approach 2:
The invention changes the geometric parameters of the packaging material web by cutting along non-linear paths and repositioning subwebs with different orientations. This parameter transformation allows window formation without material removal, converting the waste generation problem into a geometric reconfiguration solution that maintains versatility for various window types.
3Productivity
If traditional window formation methods are used on VFFS or HFFS machines, then windows can be created in packages, but the waste generation and waste stream handling become serious problems
Solution Approach 1:
The packaging material is segmented into subwebs through non-linear cutting, allowing the material to be reconfigured into windowed structures without removing any portions. This segmentation enables continuous production on VFFS or HFFS machines while eliminating waste generation, maintaining productivity without the harmful waste stream associated with traditional methods.
Solution Approach 2:
The invention inverts the traditional approach by rearranging material segments rather than removing them. This allows windowed packages to be produced with 100% material utilization, eliminating waste while maintaining the productivity required for industrial packaging operations on VFFS or HFFS machines.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach eliminates waste generation and allows for efficient production of windowed packaging materials with transparent or breathable windows, suitable for various flexible materials like paper and plastics, without the need for handling waste streams.
Implementation Method 1
adhering the first subweb to the second subweb at their respective protruding edge portions to form a web of windowed packaging material
Implementation Method 2
adhering the first subweb to the second subweb at their respective protruding edge portions
Data Source
AI summary
A method is disclosed for forming a windowed packaging material. According to the method a web of packaging material is cut in substantially the machine direction along a non-linear path. The cutting action provides two subwebs, each having protruding edge portions and recessed edge portions. The two subwebs are displaced relative to one another so that the protruding edge portions face one another. In this configuration opposing recessed edge portions form windows. The two subwebs are adhered to one another at the opposing protruding edge portions. The resulting windows may be covered with a material that is transparent and/or breathable. A strip of handle material may be applied spanning the respective windows.