Container Seal Label Tear Strip for Easy Opening
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Solution Overview
Problem
Existing smokeless tobacco containers require manual opening with fingernails or tools, compromising seal integrity and shelf stability.
Innovation Solution
A label with a tear strip featuring a polymer inner web with weakened portions, scores, or cuts, bonded to a polymer or paper outer web, allowing easy opening without tools and maintaining seal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a label is sealed around the entire container without weakened portions, then seal integrity and shelf stability are improved, but ease of opening deteriorates (requiring fingernails or tools to rip the label)
Solution Approach 1:
The label is segmented into two functional layers: an outer web providing seal integrity and an inner web with a tear strip containing weakened portions. This segmentation allows the label to maintain both strong sealing and easy opening capabilities through the tear strip that guides controlled tearing between the adhesive-bonded portions.
Solution Approach 2:
The weakened portions, scores, or cuts are pre-formed in the inner web during label manufacturing, creating a predetermined tear path before the label is applied to the container. This preliminary action ensures that when opening is required, the label will tear cleanly along the pre-defined path without compromising the outer web seal.
2Ease of operation
If weakened portions are created in the label to enable easy opening, then ease of opening is improved, but seal integrity deteriorates (compromising shelf stability)
Solution Approach 1:
The label structure separates the opening function (inner web with tear strip) from the sealing function (outer web). The weakened portions are confined to the inner web only, allowing tearing without affecting the integrity of the outer web that maintains the seal around the container.
Solution Approach 2:
The inner web acts as an intermediary layer between the user and the sealed container. It provides the tear strip for easy opening while the outer web maintains the actual seal. The adhesive bonding connects these layers, allowing the inner web to be torn without compromising the outer web's sealing function.
3Ease of operation
If a tear strip is added as a separate component, then ease of opening is improved, but device complexity increases
Solution Approach 1:
The tear strip is merged with the label itself by forming the weakened portions directly in the inner web of the label structure. This integration eliminates the need for separate opening mechanisms while maintaining seal integrity through the outer web, thus improving ease of opening without significantly increasing overall device complexity.
Data Source
AI summary
Articles of manufacture, products, and packaging methods are provided that include a label with a tear strip. A labeled container includes a base, a lid, and a label sealing the base to the lid. The base includes a bottom wall and a base side wall. The lid includes a top wall and a lid skirt. The lid mates with the base to define an interior space. The label has a front face and a rear face. The label includes an outer web including polymer film, paper, or a combination thereof and an inner web of polymer. A tear strip is defined in the inner web by one or more weakened portion, score lines, or cuts in the inner web. The rear face of the label is adhesively bonded to the base side wall and to the lid skirt to form a seal between the base and the lid. The tear strip is positioned between a portion of the label adhesive bonded to the base side wall and a portion of the label adhesively bonded to the lid skirt. The tear strip can be used to open the container.