Thin Label Application via Weakening Line Detachment
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Solution Overview
Problem
Conventional label application methods require thick backing layers for rigidity, leading to excessive material usage and waste, and are challenging to implement at high speeds with thin materials, affecting label placement accuracy.
Innovation Solution
A method and apparatus that use a line of weakening between labels to detach the backing layer from the leading label, allowing for the application of thin labels at high speeds by controlling the label supply speed and using guide means to maintain alignment, reducing the need for stiffness and minimizing waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thick backing layer material is used to provide rigidity during label application, then label placement accuracy is improved, but material usage and waste increase
Solution Approach 1:
The label supply is segmented into individual labels connected by lines of weakening, allowing each label to be separated and applied individually from the backing layer, reducing the amount of backing material needed compared to a continuous thick sheet
Solution Approach 2:
The patent changes the thickness parameter of the backing layer from conventional thick material (20+ microns) to thin material (less than 20 microns) while compensating for the loss of rigidity through controlled application mechanisms and line of weakening design
2Loss of substance
If thin backing layer material is used to reduce waste, then material usage and waste are reduced, but control and label placement accuracy become challenging
Solution Approach 1:
The patent employs dynamic speed control of the label supply during the application process, adjusting the feed rate to maintain proper tension and positioning of thin backing material as it is peeled from the backing layer and applied to the article
Solution Approach 2:
The application apparatus incorporates control systems that monitor and adjust the label supply speed based on the application process requirements, ensuring consistent placement accuracy even with thin, flexible backing material
3Productivity
If conventional nip drives are used to control movement of thin liners, then label placement control becomes challenging, but high speed application is required for commercial use
Solution Approach 1:
The patent uses dynamically adjustable label supply speed that can be changed during the application cycle, allowing the system to maintain control of thin backing material at high application speeds through real-time speed modulation rather than relying on fixed nip drive mechanisms
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 reliable and efficient application of thin labels at high speeds, reducing material usage and waste, while maintaining label placement accuracy, and allowing for easier recycling of materials.
Implementation Method 1
said labels in said supply of labels joined to adjacent labels in the supply by a line of weakening such that a first, leading, label is connected to a following label by a line of weakening
Implementation Method 2
there to be a predefined stiffness in the backing layer material in order to overcome the surface tension on the label adhesive and the release values of the, typically silicone coated, backing material
Data Source
AI summary
This invention relates to application of labels from a supply of labels which are defined in sheet material and in which adjacent labels are joined together by a line of weakening to form a continuous label supply. The label sheet material is provided with a layer of adhesive which contacts with a backing layer to form the label supply. The leading label is provided with a leading edge portion detached from the backing layer from application at an application point to an article and the article and label feed movement are controlled such that the remainder of the label can be detached from the backing layer, and the line of weakening broken effectively and accurately and without the need for the sheet material of the label supply and/or backing layer to have a thickness to provide the level of rigidity or stiffness of the material which is conventionally required, thereby reducing material usage and wastage.