Re-closeable Tear Pack with Perforated Tuck Panel
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Solution Overview
Problem
Conventional packaging solutions lack effective tamper resistance and re-closability, especially for perishable items that require protection from environmental factors like oxygen and light.
Innovation Solution
A re-closeable pack design featuring a box structure with a perforated line at the upper end that allows for easy opening and re-closing, utilizing pressure-sensitive adhesives to seal and stabilize the tuck panel, and a slit to retain the distal end of the tuck panel for secure re-closure, made from a single web of material with specific fold lines and varnish-free areas for improved bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional packaging is used, then manufacturing is simple, but tamper resistance and re-closability are lacking
Solution Approach 1:
The pack is divided into distinct functional segments: a tuck panel for sealing, an upper portion with perforated line for tamper evidence, and a slit for re-closure. This segmentation allows each component to perform its specific function while maintaining overall structural integrity and providing both tamper resistance and re-closability
Solution Approach 2:
The tuck panel is nested within the box structure, with its distal end positioned to engage with the slit in the back panel. The upper portion is integrated into the back panel structure. This nesting approach allows multiple functions (sealing, tamper evidence, re-closure) to be incorporated within the existing pack geometry without significantly increasing external dimensions or complexity
2Ease of operation
If the pack is made re-closeable with a slit and tuck panel, then re-closability is improved, but manufacturing complexity increases
Solution Approach 1:
The perforated line is pre-formed in the upper portion during manufacturing, and the slit is pre-cut in the back panel. These preliminary actions prepare the structure for easy consumer operation (tearing and re-closing) without requiring complex assembly steps. The tuck panel is pre-positioned to engage with the slit, enabling intuitive re-closure by the end user
Solution Approach 2:
Varnish-free areas are applied locally to specific regions (rear surface of the blank and front surface of the upper portion of the back panel) to enable adhesive bonding only where needed. This localized treatment simplifies manufacturing by applying complexity only to the necessary areas rather than treating the entire surface, facilitating the re-closure function without overwhelming manufacturing complexity
3Strength
If adhesive is applied to seal the tuck panel, then sealing effectiveness is improved, but varnish coverage must be reduced in specific areas
Solution Approach 1:
Varnish is selectively omitted from specific areas (rear surface of the blank and front surface of the upper portion of the back panel) where adhesive bonding is required. This local quality change ensures strong sealing at the tuck panel interface while maintaining varnish coverage on other surfaces for aesthetic and protective purposes, thus achieving strong seals without requiring large varnish-free areas
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 tamper resistance and easy re-closability while protecting contents from environmental exposure, ensuring the integrity and freshness of consumable items.
Implementation Method 1
an upper portion being circumscribed by a perforated line that is configured to cause the upper portion to stay connected to the tuck panel and tear away from the back panel if the upper end of the box structure is opened
Implementation Method 2
utilizing pressure-sensitive adhesives to seal and stabilize the tuck panel
Implementation Method 3
a slit to retain the distal end of the tuck panel for secure re-closure
Data Source
AI summary
The pack includes a box structure defining an inner cavity. A side of the box structure is sealed by a first adhesive. A lower end of the pack is sealed by a second adhesive connecting a rear surface of a lower panel of a front panel to a front surface of a lower glue panel of a back panel. The upper portion of the pack is circumscribed by perforated lines that cause the upper portion to remain connected to the tuck panel if the upper end of the pack is opened. The blank for forming the pack includes an upper portion of a back panel that is circumscribed by perforated lines. The method of making the pack includes applying an adhesive to the upper portion of the back panel and connecting a rear surface of a tuck panel to the upper portion.