Foil Bag Handle and Reclosure Design
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Solution Overview
Problem
Existing film bags with side gussets and reclosures face challenges in balancing material costs, load-bearing capacity, and ease of handling, particularly when designed for large volumes or heavy fillings, as they often require additional foil strips or prefabricated handles, and the removal opening may not be large enough for easy access.
Innovation Solution
A film bag design where the front walls and side folds extend along the entire longitudinal edge, with a reclosure attached to the first front wall using connection lugs and a window-shaped removal area, allowing easy access and distribution of weight across both front walls and side folds, and featuring a carrying handle formed by simple punching or material separation, which enhances stability and handling without additional material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a carrying handle is added to a film bag with side gussets and reclosure, then ease of handling is improved, but device complexity and material costs increase due to requiring additional foil strips or prefabricated handle arrangements
Solution Approach 1:
The carrying handle is integrated directly into the front wall structure of the bag by forming a recess or groove in the film material itself, eliminating the need for separate handle components. This merging of functions allows the front wall to simultaneously provide structural support and handle functionality, reducing both material costs and device complexity while maintaining ease of handling.
2Ease of operation
If the reclosure is positioned close to the top edge of the bag, then ease of operation for pouring is improved, but reliability decreases due to risk of accidental opening or damage before use
Solution Approach 1:
The reclosure is positioned near the top edge to facilitate easy pouring operations, but protective seals or coverings are pre-applied to the reclosure mechanism. These protective elements remain in place until the bag is ready for use, preventing accidental opening or damage during storage and transport, thus maintaining both ease of operation and reliability.
3Ease of operation
If the removal opening is made large for easy access, then ease of operation is improved, but strength of the front wall is reduced
Solution Approach 1:
The front wall is designed with a large removal opening to enable easy access to contents, but the opening is strategically positioned and shaped to minimize structural compromise. Reinforcement elements or strategic placement of the opening away from critical load-bearing areas maintain the overall strength of the front wall while providing sufficient access for scooping and pouring operations.
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
The design provides improved functional properties with reduced material costs, enhanced stability, and easy handling, allowing for efficient pouring and scooping of contents while maintaining structural integrity even after opening, with a large removal opening and secure closure.
Implementation Method 1
a reclosure (3) with reclosure strips (15) that lock together, with the reclosure (3) being fastened to the first front wall (1a) with both connecting lugs (16)
Implementation Method 2
the snap-in strip of one sliders for connecting and disconnecting are overlapped
Implementation Method 3
such gusset bags can also be differentiated with regard to their manufacturing process. In this way, gusseted bags can be manufactured one after the other from a continuous web of material by folding and heat-sealing
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a foil bag with side gussets (2) and a resealable closure (3) attached to a first front wall (1a) on its inner side and accessible via a dispensing area (11). A carrying handle (7) is formed on a sealed head section (6) by simply cutting through the front walls (1a, 1b). The side gussets (2) extend from the bottom of the bag to the top edge along the entire longitudinal edges (9) of the bag. The resealable closure has interlocking closure strips, each with a connecting tab and a locking bar, the locking bars being able to be connected and disconnected by a slider. The invention also relates to a flattened, unfilled foil bag and a method for manufacturing the foil bag.