Video Camera Register Control for Printing Machines
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Solution Overview
Problem
Current register control systems in printing machines are inefficient due to manual operation, high startup times, and material waste, as they cannot autonomously manage pressure and density, and existing solutions like video cameras are costly and impractical for real-time adjustments.
Innovation Solution
A device with a high-resolution video camera movable along a motorized guide, combined with image processing means, automatically detects and adjusts printing parameters like register, pressure, and density by recognizing reference marks on the print medium, allowing for immediate and simultaneous corrections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment of photocells is used for register control, then the system can check print register, but the startup time increases and operator intervention is required
Solution Approach 1:
The system uses a video camera to automatically capture images of register marks and performs automated image processing to detect and measure registration errors, eliminating the need for manual photocell positioning and operator intervention while maintaining measurement precision
Solution Approach 2:
The patent replaces the mechanical photocell-based detection system with an electronic video camera and image processing system, enabling automated detection and measurement of register marks without manual intervention
2Quantity of substance
If end of line video camera inspection is used, then the entire printed matter can be inspected, but material waste increases due to delayed correction detection
Solution Approach 1:
The system performs preliminary detection of registration errors, pressure issues, and density problems at the printing assembly level during the printing process itself, enabling immediate correction before the printed material progresses through the entire production line, thus reducing material waste
Solution Approach 2:
The patent implements a feedback mechanism where the video camera continuously monitors printing parameters, the image processing system analyzes the captured images to detect deviations, and the system automatically triggers corrections at the printing assembly, creating a closed-loop control system that prevents waste accumulation
3Measurement precision
If specialized in-line density sensors are used, then density detection accuracy improves, but the system complexity and cost increase significantly
Solution Approach 1:
The patent employs a single video camera system that performs multiple functions including register mark detection, pressure measurement, and density analysis through integrated image processing algorithms, eliminating the need for separate specialized sensors for each parameter and reducing overall system complexity
Solution Approach 2:
The system combines register control, pressure monitoring, and density measurement functions into a unified video-based detection and image processing system, integrating multiple measurement capabilities into one device rather than using separate specialized sensors
Data Source
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AI summary
A device for the control and management of the printing parameters of a printing machine, particularly with a plurality of consecutive printing processes, comprising at least one video camera (2) associable with a printing and conversion assembly (3) and movable along a motorized guide (4) in order to acquire a print medium (5), image processing means being further comprised which are functionally associated with the video camera (2) to search, recognize and measure on the image of the print medium (5) acquired by the video camera (2) the printing values of at least one reference register mark reproduced on the print medium (5), the image processing means being functionally connected to means for the actuation of the printing and conversion assembly (3) to correct and restabilize the printing values according to the difference between the printing values measured by the image processing means and the desired theoretical printing values.