Printing Plate Optical Inspection for Fast Defect Verification
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Solution Overview
Problem
Existing printing processes, particularly in flexographic and offset printing, require time-consuming and laborious manual checks on printing plates, leading to uncertainty and significant economic losses due to unsuitable plates being used, and lack of in-line control systems in rotogravure machines result in inefficient energy consumption and material waste.
Innovation Solution
A machine for checking flexographic and offset printing plates that includes a scanning unit and control unit to automatically compare real images of plates with reference images, identifying defects and ensuring suitability for printing jobs, thus preventing unsuitable plates from being used and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual checks are performed by operators, then quality control can be carried out, but time is consumed and human error occurs
Solution Approach 1:
The patent replaces the mechanical/visual inspection system operated by humans with an automated optical scanning system. The scanning unit captures images of the printing plate, and the control unit automatically processes these images to detect defects, thereby eliminating human visual checks while reducing verification time and improving reliability through consistent automated analysis
Solution Approach 2:
The patent creates a digital copy (image) of the printing plate surface through the scanning unit. This optical copy is then analyzed by the control unit to identify defects without requiring physical handling or visual inspection by operators, thus saving time while maintaining accurate quality control through systematic image processing
2Reliability
If printing tests are performed on dedicated machines, then plate quality can be verified, but productivity is reduced due to additional time requirements
Solution Approach 1:
The patent performs quality verification in advance using the scanning and image analysis system before the plate proceeds to printing tests or production. By detecting defects early through automated optical inspection, unsuitable plates are identified and removed from the workflow beforehand, preventing wasted printing tests and improving overall productivity while maintaining reliable quality control
3Reliability
If multiple verification steps are performed, then quality control is thorough, but the process becomes complex and time-consuming
Solution Approach 1:
The patent combines multiple verification functions into a single integrated system. The scanning unit and control unit work together to perform scanning, image processing, defect detection, and analysis in one unified automated process, replacing multiple separate verification steps and reducing overall process complexity while maintaining thorough quality control through comprehensive automated inspection
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 machine allows for rapid, reliable, and automated quality control of printing plates, reducing human error, saving time and resources, and significantly cutting energy and material waste by preventing unsuitable plates from being used.
Implementation Method 1
a scanning unit (7) of the surface of the at least one plate (4) to be checked... configured to acquire a real image of the at least one plate (4) to be checked
Data Source
AI summary
A machine for checking flexographic printing plates, or offset plates, or plate assemblies, or printed surfaces, including a base, a support plane, associated with the base, for at least one printing plate, or offset plate, or plate assembly, or printed surface, the surface or physical characteristics of which are to be checked and controlled, a control unit, and a surface scanning unit of the at least one printing plate, or offset plate, or plate assembly, or printed surface to be checked. The scanning unit is operatively connected to the control unit, and is configured to acquire a real image of the at least one printing plate, or offset plate, or plate assembly, or printed surface to be checked.