Reclosable Bag Header with Removable Tamper-Evident Panel
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Solution Overview
Problem
Reclosable bags lack a tamper-evident mechanism that allows access to the closure without damaging the bag or leaving adhesive residue, compromising the bag's usability after the seal is removed.
Innovation Solution
A reclosable bag design featuring a header with a covering flap and a removable panel, where the covering flap includes a zone of weakness that can be torn to access the closure without separating from the bag body, ensuring the bag remains usable and providing visual evidence of tampering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an adhesive seal is placed over the reclosable closure to prevent using the closure without first breaking the seal, then tamper evidence is provided, but the seal or bag must be torn open to access the contents which causes damage to the bag or leaves adhesive residue on the closure that affects the operation of the closure
Solution Approach 1:
The header is divided into two separate parts: a covering flap that remains attached to the bag body and a removable panel that can be detached. This segmentation allows the tamper-evident function to be provided by the removable panel while the covering flap remains intact and functional, resolving the contradiction between tamper evidence and closure operation.
Solution Approach 2:
The tamper-evident function is extracted from the adhesive seal and transferred to the removable panel. The removable panel can be easily removed to provide access to the closure without requiring tearing or leaving residue, while still providing visual evidence of tampering when removed. This extracts the harmful tearing action from the system while maintaining the tamper evidence function.
2Ease of operation
If the seal is removed to access the closure, then access to the contents is enabled, but damage is caused to the bag enclosure or adhesive residue is left on the closure that compromises the bag's usability
Solution Approach 1:
The removable panel is extracted as a separate component that can be easily removed to access the closure. This extraction allows access to the closure without damaging the bag body or leaving adhesive residue on the closure, as the removable panel is designed to detach cleanly from the covering flap.
Solution Approach 2:
The removable panel acts as an intermediary between the covering flap and the closure. It provides a controlled access path that can be removed to reveal the closure while protecting the closure from direct contact with tearing forces or adhesive residue during the access process.
3Reliability
If a tamper-evident mechanism is added to the bag, then customer confidence in product protection is improved, but the device complexity increases
Solution Approach 1:
The header is segmented into the covering flap and removable panel, which are relatively simple components that can be easily manufactured and assembled. This segmentation provides tamper evidence through the removable panel's presence or absence while maintaining a simple overall structure that does not significantly increase device complexity.
Solution Approach 2:
The tamper-evident function is localized to the removable panel portion of the header, while the covering flap maintains its original simple structure. This local quality approach allows the tamper evidence function to be added without requiring complex changes to the entire header structure, thus minimizing the increase in device complexity.
Data Source
AI summary
A bag has a bag body that defines an interior and opening. A reclosable closure repeatably closes the opening. A header includes a covering flap connected to the bag body and has upwardly and inwardly angled side edge margin. Zones of weakness defining a tear strip extend across the covering flap. The covering flap can be attached to the bag body while covering the closure. To access the closure, the tear strip is torn away. The bag can also have a removable panel, which can be attached to the removable panels of other bags to form a header pack. The bag body and covering flap can be removed from the header pack by being torn along another zone of weakness between the covering flap and removable panel that has a lower tear strength than the zones of weakness defining the tear strip.