Modular Rotating Magnet Assembly for Optical Effect Layers
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Solution Overview
Problem
There is a need for a modular, easily replaceable apparatus that can generate a rotating magnetic field of any desired shape to produce a variety of optical effects by orienting magnetic or magnetizable pigment particles in a coating using time-varying magnetic fields, suitable for integration into existing rotating magnetic cylinders or flatbed printing units.
Innovation Solution
The apparatus consists of a holder with a mounted electric motor and a permanent magnet assembly that can be removed and replaced, allowing for the generation of rotating magnetic fields by spinning the permanent magnet assembly within a support structure, which can be easily integrated into rotating magnetic cylinders or flatbed printing units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static magnetic fields are used to orient magnetic pigment particles, then the production of magnetically induced images is highly resistant to counterfeit, but the security features lack dynamic and aesthetically appealing optical effects
Solution Approach 1:
The patent applies the dynamics principle by transitioning from static magnetic fields to dynamic rotating magnetic fields. The permanent magnet assembly rotates to generate time-varying magnetic fields that dynamically orient pigment particles, creating moving optical effects while maintaining security through the complexity of the rotating field generation
2Adaptability or versatility
If complex permanent magnet assemblies are used to generate rotating magnetic fields, then dynamic optical effects can be produced, but the device complexity and difficulty of replacement increase
Solution Approach 1:
The patent applies segmentation by dividing the system into a permanent magnet assembly that can be independently removed and replaced. The magnet assembly is segmented from the motor and holder, allowing complex magnet configurations to be used during operation while enabling easy replacement when effects need to be changed or maintenance is required
Solution Approach 2:
The patent applies universality through the holder design that can accommodate different permanent magnet assemblies. The same holder and motor structure can work with various magnet configurations to produce different optical effects, reducing overall system complexity while maintaining versatility
3Ease of repair
If permanent magnet assemblies are made easily replaceable, then maintenance and effect variation become simpler, but the connection reliability and precision may be compromised
Solution Approach 1:
The holder is designed with segmented, modular connection points that allow the permanent magnet assembly to be independently removed and replaced. This segmentation enables easy maintenance and effect variation while maintaining reliable connections during operation through precise mechanical interfaces
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
This solution enables the production of dynamic and aesthetically appealing optical effect layers with a wide range of optical effects, enhancing security features by providing a modular and efficient method for orienting magnetic pigment particles, thereby improving the security and authenticity of value documents and commercial goods.
Implementation Method 1
a motor (2a, 2b+2c), preferably an electric motor; wherein the motor (2a, 2b+2c) is configured to spin the permanent magnet assembly (PMA) (6)
Implementation Method 2
By applying an external magnetic field, a magnetic pigment particle is oriented such that its magnetic axis is aligned with the direction of the external magnetic field line at the location of the pigment particle. A magnetizable pigment particle is oriented by the external magnetic field such that the direction of its longest dimension is aligned with a magnetic field line at the location of the pigment particle.
Implementation Method 3
coatings or layers, containing magnetic or magnetizable pigment particles... for orienting magnetic or magnetizable pigment particles in an unhardened coating composition on a substrate
Data Source
AI summary
The apparatus and methods of the present disclosure relate to devices comprising spinning magnets driven by electric motors for use with printing or coating equipment. These devices and methods are for orienting magnetic or magnetisable pigment particles in an unhardened coating composition on a substrate. Specifically, these devices and methods are for producing optical effect layers. The apparatus comprises a holder, onto which is mounted a motor and a permanent magnet assembly. The motor is configured to spin the permanent magnet assembly. The holder is configured to be removably fixed to a base of a rotating magnetic cylinder (RMC) or a flatbed printing unit.