Tamper-Evident Reclosable Stand-Up Package Closure
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Solution Overview
Problem
Current stand-up, re-closable packages often have unreliable tear strips that interfere with reclosing functions and require thicker, more expensive film materials, leading to manufacturing inefficiencies and consumer discomfort.
Innovation Solution
A tamper-evident, re-closable stand-up package design using a two-part composite closure layer composed of a flexible film strip and adhesive tape, where the tape and strip are laterally overlapped and heat-sealed, eliminating the need for a tear-off strip and allowing for reliable and economical production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tear strip is added to enable tamper evidence, then package security is improved, but the tear strip interferes with reclosing function and creates consumer handling issues
Solution Approach 1:
The invention extracts the tearing function from a separate tear strip and integrates it directly into the closure member structure. The closure member includes a tab that can be torn from the main body, providing tamper evidence without interfering with the reclosing function of the remaining closure member.
Solution Approach 2:
The closure member is segmented into two parts: a removable tab portion that provides tamper evidence when torn, and a remaining portion that maintains the reclosing function. This segmentation allows both tamper evidence and reclosing capability to coexist without interference.
2Strength
If thicker film material is used to strengthen the package, then package strength is improved, but production cost increases
Solution Approach 1:
The invention uses composite construction with a flexible film web and a closure member made from the same or similar material. The closure member is formed by heat sealing and trimming the web, creating a integrated structure that maintains strength without requiring additional thicker materials.
Solution Approach 2:
The flexible film web serves multiple functions: it forms the package body, provides the closure member material, and creates the structural strength. This multi-functionality eliminates the need for separate thicker reinforcement materials, reducing production costs.
3Ease of operation
If a separate tear strip is used for opening, then opening function is improved, but leftover edges interfere with reclosing and create waste
Solution Approach 1:
The invention extracts the tearing function and integrates it into the closure member itself. The tab is torn directly from the closure member structure, eliminating separate tear strips and the associated leftover edges that would interfere with reclosing or create waste.
Solution Approach 2:
The opening function and closure function are merged into a single integrated closure member structure. The tab that provides opening capability is part of the closure member itself, so when torn, it does not leave separate edges that would interfere with the reclosing function of the remaining structure.
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 package provides a reliable, easy-to-open and reseal mechanism without waste, using thinner materials, reducing production costs and consumer handling issues while ensuring tamper evidence.
Implementation Method 1
a two-part composite closure layer consisting of a strip of web material and an adhesively-coated tape
Implementation Method 2
The body is then formed by the simultaneous heat sealing of the package and reclosing layer along the side edges of the package body
Data Source
AI summary
A re-closable, stand-up package with a tamper-evident opening system. Production of the package originates from only two feed rolls. One roll is a flexible film web and the other is an adhesive tape. A reclosing layer is constructed from a strip of web material taken from a side of the feed roll and a length of the tape. The strip portion of the closure layer is perforated along tear lines which define a package opening. The tape and the strip are then adhesively joined so that they partially overlap vertically. The closure layer is then applied to the web over a slit in the front panel forming a re-closable primary opening. A gusset fold at the bottom of the package permits the package to be free-standing vertically upright. Contents of the package can be dispensed only after rupture of the closure layer strip.