Reclosable Zipper Apertures for Package End Stability
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Solution Overview
Problem
Reclosable gusseted packages often experience separation of zipper ends when opened due to weak connections from ultrasonic welding, leading to manufacturing inefficiencies and consumer alignment issues.
Innovation Solution
The implementation of opposing flanges with apertures or notches on a reclosable zipper, allowing package panels to seal through these openings, reducing the likelihood of zipper separation and potentially eliminating the need for ultrasonic welding at the ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If ultrasonic welding is used to connect zipper ends to package panels, then the zipper can be sealed to the panels, but the connection is weak and zipper ends separate when opening the package
Solution Approach 1:
The zipper end connection is segmented into multiple attachment points through apertures and notches distributed along the zipper end edges. These segmented connection points work together to provide cumulative strength, preventing zipper end separation while maintaining panel connectivity.
Solution Approach 2:
Apertures and notches serve as intermediary structures between the zipper ends and package panels. These intermediaries create additional sealing surfaces and mechanical interlocking points, strengthening the connection beyond direct ultrasonic welding alone.
2Ease of manufacture
If ultrasonic welding is used to seal zipper ends to panels, then sealing is achieved, but manufacturing costs increase due to the need for welding equipment and processes
Solution Approach 1:
The invention replaces expensive ultrasonic welding equipment and processes with simpler, lower-cost alternative sealing methods. The apertures and notches enable sealing through means that are more economical and easier to implement in manufacturing settings.
3Ease of operation
If ultrasonic welding is used to connect zipper ends, then connection is achieved, but alignment difficulties arise during the welding process
Solution Approach 1:
The apertures and notches are designed to self-align during the sealing process. The geometric features guide the relative positioning of zipper ends to panels, enabling automatic alignment without requiring high-precision positioning equipment or complex alignment procedures.
Solution Approach 2:
The aperture and notch configurations are pre-configured to establish alignment relationships before the actual sealing operation. This preliminary geometric arrangement ensures proper positioning is achieved automatically during the sealing process, eliminating alignment difficulties.
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 configuration enhances the stability of the zipper ends during opening, simplifies alignment, and reduces manufacturing costs by minimizing the need for ultrasonic welding, while maintaining effective sealing and reclosure functionality.
Implementation Method 1
the flanges have openings disposed adjacent to side edges of the profiles, so that when the profiles are sealed to inner faces of the package panels, portions of the panels seal to each other through the openings
Data Source
AI summary
A reclosable zipper is provided having first and second opposing profiles forming at least one pair of opposing flanges. The flanges have cutouts, such as notches or apertures, disposed adjacent to side edges of the profiles so as to define at least one pair of cutouts. When the profiles are sealed to opposing inner surfaces of package panels, portions of the panels seal to each other through the at least one pair of cutouts, providing a reinforcing structure to opposing ends of the zippers, thereby preventing the zipper ends from separating upon opening the package.