Press Lock Seal Strips for Airtight Bag Closure
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Solution Overview
Problem
Existing methods for reclosing food product bags after opening fail to provide a sufficient air-tight seal, leading to reduced freshness due to air exposure, especially when the bag is rolled over and secured with elastic bands, paper clips, or adhesive tape, which do not effectively prevent air from entering.
Innovation Solution
A device featuring press lock seal strips with adhesive material and removable protective covering strips, allowing for a secure and airtight closure by pressing the strips together, preventing premature adhesion and ensuring a snug fit to maintain freshness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bag top is rolled over and secured with elastic bands, paper clips, or adhesive tape, then the bag can be reclosed, but air still enters and freshness is not preserved
Solution Approach 1:
The closure system is divided into separate functional components: a first strip with adhesive material for sealing to the bag, and a second strip with a press lock mechanism for securing the seal. This segmentation allows each component to perform its specific function optimally - the adhesive provides the seal while the press lock provides the securing force, together achieving both ease of operation and reliability.
Solution Approach 2:
The adhesive material is applied to the first strip in advance during manufacturing, and the press lock mechanism is pre-assembled on the second strip. When the user wants to reclose the bag, they simply need to position and press the strips together without needing to apply adhesive or assemble components at the moment of closure, making the operation simple and reliable.
2Reliability
If adhesive material is applied directly to the strip, then a strong seal is formed, but premature adhesion occurs before use
Solution Approach 1:
A removable adhesive cover is introduced as an intermediary protective layer between the adhesive material and the environment. This cover prevents premature adhesion by isolating the adhesive from contact with the bag or other surfaces during storage and transport. When ready to use, the cover is removed, allowing the adhesive to function properly without having been activated too early.
Solution Approach 2:
The adhesive cover is applied to the adhesive material during manufacturing as a preliminary protective action. This ensures the adhesive remains inactive and protected until the moment of use, when the cover is deliberately removed to activate the sealing function. This preliminary protection prevents unwanted adhesion while maintaining the adhesive's effectiveness.
3Reliability
If a press lock seal mechanism is built into the bag during manufacturing, then a secure seal is achieved, but the bag structure becomes more complex and costly
Solution Approach 1:
Instead of integrating a complex press lock mechanism into the bag structure during manufacturing, the invention segments the closure system into two separate strips that can be independently manufactured and then assembled. The first strip contains the adhesive material while the second strip contains the press lock mechanism, allowing each to be produced separately and simplifying the overall manufacturing process while maintaining seal security.
Solution Approach 2:
The adhesive material acts as an intermediary bonding agent between the two separate strips, eliminating the need for complex mechanical interconnections or integrated structures. The adhesive provides the necessary bonding strength to hold the strips together and secure the seal, while the press lock mechanism on the second strip provides the securing force, together achieving reliable closure without increasing bag structural complexity.
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 solution effectively maintains food freshness by creating a tight seal that prevents air from entering the bag, extending the shelf life of food products by providing a reliable and easy-to-use re-closure mechanism.
Implementation Method 1
adhesive material disposed on opposed inside portions of the opposing strip portions
Data Source
AI summary
A bag sealing device comprises an opposed press lock structure together with two adhesive bearing strips disposed below the press lock structure together with at least one strip that is employed to prevent premature sticking of the two adhesive bearing strips. This device is employed in combination with a bag containing a food product with disposed within the bag.