Wrap-Around Label Adhesion via Asymmetric Corner Positioning
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Solution Overview
Problem
Existing wrap-around labels for objects like containers are expensive, prone to unintentional detachment due to expansion or pressure changes, and require special devices for easy removal, which increases costs and complexity.
Innovation Solution
A device with a rotating transfer mechanism, such as a vacuum cylinder, where the label corner areas are positioned closer to the axis of rotation, avoiding adhesive application, allowing the corners to remain unattached and facilitating easy removal without additional expenses or special devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is applied to the entire label end edge to ensure reliable attachment, then the label adheres reliably under various conditions, but the label cannot be easily removed and may unintentionally tear or flake off
Solution Approach 1:
The label end edge is segmented into two distinct zones: a structured surface area that receives adhesive application for reliable attachment, and smooth corner areas that remain adhesive-free for easy manual removal. This segmentation allows the label to be both reliably attached and easily removed without tearing.
Solution Approach 2:
Different surface qualities are applied to different parts of the label end edge. The majority of the surface has a structured texture for adhesive absorption, while the corner areas have a smooth surface that repels adhesive. This local differentiation enables the label to adhere reliably in most areas while remaining easily removable at the corners.
2Ease of operation
If special labels with tear lines or tear threads are used to enable easy removal, then the label can be detached easily, but the production cost increases
Solution Approach 1:
The labeling device automatically creates adhesive-free corner areas on the label during the labeling process itself, eliminating the need for pre-manufactured special labels with tear lines or threads. The smooth corner areas are formed by the geometry of the application surface, requiring no additional manufacturing steps or special label materials.
3Ease of operation
If the label corners are positioned closer to the axis of rotation to avoid adhesive application, then the corners remain unattached and facilitate easy removal, but the label application geometry changes
Solution Approach 1:
The application surface is designed with asymmetric geometry where the corner areas are positioned closer to the axis of rotation compared to the rest of the label end edge. This asymmetric positioning naturally creates adhesive-free zones at the corners while maintaining proper label alignment and application geometry through the structured surface 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
Enables inexpensive, easily removable, and reliable label application under various conditions, preventing unintended detachment and reducing production costs by avoiding adhesive application on label corners.
Implementation Method 1
a vacuum cylinder, whose supporting surface for the label end edges is formed in the upper and/or lower corner area of the label end edge assigned surface portions running radially inwards
Data Source
Figure 1~2
Figure 3
AI summary
Device for providing containers, bottles and cans with a circular label comprises a transfer unit and/or adhesion unit so that the end edge of the label does not adhere in the region of the upper and/or lower corners. Preferred Features: The transfer unit is formed as a rotating rotor with holders for the label. The adhesion unit is formed as a gluing roller arranged on the periphery of the transfer unit.