Staggered Hook Fastener for Package Closure Integrity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional surface bonding fasteners fail to prevent contents from unintentionally opening and dropping out of a package when it is reversed, especially due to pressure from heavier contents.
Innovation Solution
A surface bonding fastener design featuring a first and second base sheet, blocking sheets with free ends, and fastening units arranged in a staggered and overlapping configuration to enhance closure strength and prevent unintentional opening, with hooks and hook portions for secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional surface bonding fasteners are used to close the package opening, then the package can be opened and closed repeatedly, but the contents may unintentionally open the package when it is reversely placed due to pressure from the contents
Solution Approach 1:
The patent inverts the conventional fastening approach by positioning the fastening units on blocking sheets that extend into the package interior rather than on the outer surface. The blocking sheets with fastening units are secured to opposite sheets near the opening, with fastening units arranged to engage when the package is properly oriented, creating a configuration where gravity and content pressure assist rather than oppose the closed state
Solution Approach 2:
The patent transitions from a two-dimensional surface bonding approach to a three-dimensional configuration by extending blocking sheets into the package interior space. The fastening units are positioned on these blocking sheets at strategic locations including near the opening and at intermediate positions, creating multiple engagement points that distribute and resist content pressure from all directions
2Stress or pressure
If blocking sheets are secured to disperse pressure from contents, then some pressure distribution is achieved, but heavy contents or long-term reverse placement still cannot prevent unintentional opening
Solution Approach 1:
The patent divides the blocking function into multiple segmented blocking sheets rather than a single continuous barrier. Each blocking sheet has fastening units at specific segments (near the opening and at intermediate positions), creating discrete pressure distribution points that collectively resist content pressure more effectively than a single undivided blocking structure
Solution Approach 2:
The patent combines multiple functions into the blocking sheets: they serve as both structural elements for pressure distribution and as carriers for fastening units. The blocking sheets are integrally formed with or secured to the package sheets, merging the support function with the fastening function to create a unified pressure-resistant closure system
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 effectively prevents contents from dropping out by ensuring tighter fastening engagement when the package is reversed, while allowing for air discharge and minimizing moisture ingress, thus maintaining content integrity.
Implementation Method 1
The plurality of first fastening units and the plurality of second fastening units are configured to be fastened with each other so as to close the opening of the package
Data Source
AI summary
A surface bonding fastener for opening and closing an opening of a package comprises a first base sheet having a first surface; a second base sheet having a second surface facing the first surface; first and second blocking sheets secured to the first and second surfaces at first and second fixing ends; and plurality of first and second fastening units on first and second free ends opposite to the first and second fixing ends. The first and second fixing ends are closer to the opening of the package than the first and second free ends that are between the first and second base sheets. The first and second fastening units are arranged at intervals in a longitudinal direction and staggered in a transverse direction perpendicular to the longitudinal direction. The first and second fastening units are configured to be fastened with each other for closing the opening of the package.