Side-Gusset Bag Handle Assembly Gap Design
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Solution Overview
Problem
Side-gusset bags with handle assemblies attached to the outside of folded side panels tend to spread when laid flat, making storage and handling difficult, and existing manufacturing methods are either expensive or result in substantial spreading effects.
Innovation Solution
A handle assembly with a pair of film handle halves that leave a gap of at least 2 mm wide along the crease of the folded side panel, allowing the panel to fold easily and minimizing spreading, while being secured with a thin application film for easy attachment and handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a handle assembly is attached to the outside of folded side panels, then the bag can be easily handled and carried, but the bag tends to spread when laid flat, making storage difficult
Solution Approach 1:
The handle assembly is divided into two separate handle halves that are attached to opposite sides of the folded side panel, with a gap between them. This segmentation allows the handle to provide grip functionality while the gap prevents the handle from causing the bag to spread when laid flat.
Solution Approach 2:
The handle halves are positioned at specific locations on the folded side panel, with the gap strategically placed to avoid interfering with the bag's folding and storage characteristics. The local arrangement optimizes both handleability and prevention of spreading.
2Ease of manufacture
If existing manufacturing methods are used to attach handle assemblies, then the bag can be produced, but the manufacturing process is either expensive or results in substantial spreading effects
Solution Approach 1:
The handle assembly is manufactured as two separate halves that can be independently formed and then attached to the bag. This segmentation simplifies the manufacturing process compared to forming a single continuous handle, reducing equipment costs while preventing spreading through the gap design.
3Reliability
If the handle assembly extends across the folded side panel, then the handle is secure and stable, but the folding process is impaired and storage is difficult
Solution Approach 1:
The handle is segmented into two halves attached to opposite sides of the fold, with a gap between them. This allows the handle to remain stable and secure for gripping, while the gap enables the folded side panel to fold easily without interference from a continuous handle structure.
Solution Approach 2:
The handle halves are positioned in a way that utilizes the three-dimensional structure of the folded side panel, with the gap allowing the panel to fold along its length while the handle halves remain stable on the outer surface.
Data Source
AI summary
A side-gusset bag has front and back face panels each having two longitudinally extending side edges. Two folded side panels are each joined to the face panels at the side edges and each having a center longitudinally extending crease between the respective side edges. A handle assembly consists of a pair of substantially identical handle halves each formed by two longitudinally spaced ends fixed to one of the side folds to a respective side of the crease thereof and a middle section extending between the respective ends and formed unitarily therewith of plastic film. The middle sections are transversely spaced and form an open longitudinally extending gap at least 2 mm wide and aligned with the respective crease. The middle sections extend transversely over less than 80% of a transverse width of the one side fold and have outer edges space at least 5 mm from the respective side edges.