Bag Manufacturing With Two-Layer Web and Interrupted Seams
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Solution Overview
Problem
Existing bag manufacturing methods using single-layer material webs for bags with openings are limited in design flexibility and cost-effectiveness, as they require printing on both sides and lack efficient closure mechanisms.
Innovation Solution
A method involving a continuous material web folded into a two-layer structure with interrupted connecting seams and a continuous separating cut to create openings, allowing for printing on one side and enhanced design options, along with the use of ziplocks and peel-seal seams for closure, and additional pockets for smoking items.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-layer material web is used for bag manufacturing, then the structure is simple and production is straightforward, but design flexibility is limited and printing costs increase due to requiring printing on both sides
Solution Approach 1:
The patent transitions from a single-layer to a multi-layer material web structure, adding the dimension of layering to resolve the contradiction. By folding the material web and creating multiple layers, the invention enables printing on only one side while still achieving comprehensive design coverage, thus improving design flexibility without requiring printing on both sides.
Solution Approach 2:
The patent employs a composite material web structure where multiple layers are combined through folding and connecting seams. This composite approach allows different layers to serve different functions (e.g., printing surface, structural support, closure mechanisms), thereby enhancing design flexibility while maintaining production efficiency.
2Productivity
If a continuous separating cut is made to form bag openings, then production efficiency is improved and costs are reduced, but wrinkles may form in the separated layer
Solution Approach 1:
The patent applies preliminary action by making the continuous separating cut after the material web has been folded and connected into a multi-layer structure. This sequencing ensures that the cut is made on a stabilized structure, reducing the formation of wrinkles while maintaining production efficiency. The connecting seams provide structural support during the cutting process.
Solution Approach 2:
The patent uses segmentation by creating interrupted connecting seams rather than continuous ones. This segmentation allows the material web to be divided into manageable sections that can be separated cleanly without excessive wrinkling, while still maintaining overall structural integrity and production efficiency.
3Adaptability or versatility
If interrupted connecting seams are used in the longitudinal direction, then design flexibility and closure mechanisms are enhanced, but the structure becomes more complex
Solution Approach 1:
The patent applies segmentation by using interrupted connecting seams instead of continuous ones. The seams are divided into segments that allow for closure mechanisms (such as ziplocks or adhesive strips) to be integrated at the interruption points. This segmentation enhances adaptability by enabling various closure options while maintaining a relatively simple overall structure.
Solution Approach 2:
The interrupted connecting seams serve multiple functions: they provide structural connection where needed, allow for closure mechanisms at interruption points, and enable design flexibility. This multi-functionality reduces the need for separate components, thereby managing complexity while enhancing adaptability.
4Ease of manufacture
If a two-layer material web is used with printing on one side, then design space is expanded and costs are reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The patent uses the layering dimension to resolve the printing cost contradiction. By creating a multi-layer structure through folding, the invention allows printing to be applied to only one side of the material web while the folded structure provides sufficient design space and surface area for comprehensive branding and information, thereby reducing printing costs without compromising design capabilities.
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 expands design possibilities, reduces costs, and provides a more efficient and versatile closure mechanism for bags, while minimizing wrinkles and maintaining the integrity of the material web.
Implementation Method 1
the two layers of the continuous material web are then connected to one another by applying at least one connecting seam
Implementation Method 2
a layer of the double-layer continuous material web is separated by a preferably continuous separating cut to form the opening for the bags
Implementation Method 3
later ends of the material strip are welded in the area of the side edges of the bags after the ziplock has been at least partially opened
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Method for manufacturing (tobacco) pouches (10), wherein the pouches (10) have a pocket (11) for receiving a pouch contents, and wherein the pocket (11) has an opening (13) for supplying orfor removing the bag contents, which can be covered by a bag flap (14) of the bag (10), wherein the bags (14) are made from a continuous web of material (22) which is folded to form an at least partially two-layer continuous web of material (22), and then the two layers (24, 26) of the continuous web of material (22) are joined together by applying at least one joining seam (21, 33, 34, 37), and then one layer (26) of the double-layered continuous web of material (22) is separated by a slit (39) to form the opening (13) for the bags (10), and then longitudinal and/or transverse seams (21, 33, 34, 37) for the bags (10) are applied to the continuous web of material (22) and then the bags (10) are separated from the continuous web of material (22).