Segmented Die-Cut Handle for Heavy Plastic Bags
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Solution Overview
Problem
Heavy, slick plastic bags containing dry particulate products are difficult for consumers to grip and manipulate, and prone to rupture, posing challenges for both retailers and users due to their weight and material properties, with cost constraints limiting effective solutions.
Innovation Solution
A bag design featuring a die-cut handle with multiple flaps that flex away from the handle region, allowing the user to grip the bag comfortably by contacting non-cut edges, and a two-layer laminate construction with a support layer for added strength to prevent rupture, with the handle positioned near a corner for ergonomic handling and pouring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional single-handle bag design is used, then the bag structure is simple and manufacturing cost is low, but the bag is difficult to grip and manipulate due to its slick plastic material and shape
Solution Approach 1:
The handle is segmented into multiple flaps (first flap and second flap) that can flex independently, allowing the user to grip the bag more effectively. The flaps are separated by a distance that enables individual movement, creating multiple contact points for the user's hand on the slick plastic surface.
Solution Approach 2:
The flaps are designed to be flexible and movable rather than rigid. Each flap can flex independently in response to user gripping forces, adapting to the shape of the user's hand and providing enhanced grip on the difficult-to-handle plastic bag surface.
2Ease of manufacture
If the bag uses a slick plastic material for manufacturing, then production cost is reduced, but the bag becomes difficult to grip and manipulate
Solution Approach 1:
The handle is divided into multiple discrete flaps rather than a single continuous piece. This segmentation creates multiple independent gripping surfaces that can interact with the user's hand, compensating for the low-friction properties of the slick plastic material.
Solution Approach 2:
The flaps act as intermediary elements between the user's hand and the slick plastic bag body. By providing multiple flexing surfaces, the flaps mediate the interaction, allowing the user to generate sufficient friction and grip force despite the inherently slick nature of the plastic material.
3Quantity of substance
If the bag contains heavy particulate product (50 pounds or more), then the bag can hold sufficient product volume, but the bag becomes difficult to manipulate and prone to rupture
Solution Approach 1:
The heavy load is distributed across multiple flaps rather than concentrated at a single handle point. Each flap bears a portion of the weight, and the segmented structure allows the user to apply lifting forces more effectively across multiple contact points, improving control over the heavy bag.
Solution Approach 2:
The flexible flaps allow the handle structure to adapt dynamically to the user's lifting motion and the bag's weight. The flaps can flex and move independently, distributing the mechanical stress from the heavy load across multiple points and allowing smoother manipulation of the heavy particulate product.
4Quantity of substance
If the bag weight increases with more product, then product capacity increases, but the stress on the bag construction increases leading to rupture risk
Solution Approach 1:
The handle stress is segmented and distributed across multiple flaps rather than concentrated at a single point. This segmentation reduces the peak stress on any single point of the bag construction, lowering the risk of rupture while maintaining the ability to hold heavy product volumes.
Solution Approach 2:
The flexible flap structure allows the handle to deform dynamically under load, distributing stress more evenly across the bag construction. This dynamic response prevents stress concentration that could lead to rupture, enabling the bag to safely contain heavier particulate products.
5Ease of operation
If additional cost is added to the bag design to improve handling, then handling performance improves, but the bag becomes unfeasible for mass-market commodity products
Solution Approach 1:
The handle is segmented into flaps that can be formed from the existing bag material without requiring separate components or complex assembly steps. This segmentation approach improves handling while maintaining compatibility with standard manufacturing processes for mass-market products.
Solution Approach 2:
The flaps serve multiple functions: they improve grip on slick plastic, distribute the weight of heavy products, and reduce stress on the bag construction. This multi-functionality achieves multiple performance improvements without proportionally increasing manufacturing cost, making the design feasible for mass-market applications.
Data Source
AI summary
The present invention relates to articles such as bags and related methods. In an embodiment, the invention includes an article including a first sheet, a second sheet coupled to the first sheet defining an interior volume between the first sheet and the second sheet, and a handle region defining an aperture passing through the first sheet and the second sheet. The handle region including a first flap and a second flap, the first flap coupled to the first sheet and the second sheet along a first axis, the second flap coupled to the first sheet and the second sheet along a second axis, the first axis and second axis perpendicular to one another, the first flap and the second flap configured to flex away from the handle region. In an embodiment, the invention includes a method of forming a bag including coupling a first sidewall to a second sidewall to form a rectangular bag with four corners and forming a cut pattern through the first sidewall and the second sidewall to form a handle, the pattern outlining the shape of a plurality of flaps that can each flex along separate axes. Other embodiments are also included herein.