Optical Sensor for Printing Form Detection on Cylinder
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Solution Overview
Problem
Existing printing press technologies face challenges in detecting the presence and positioning of non-conductive or poorly conductive printing forms, such as those made of plastic, which can be transparent or shiny, making it difficult to ensure accurate alignment and application during the printing process.
Innovation Solution
The implementation of an optical sensor, specifically a reflection light scanner, is used to detect the presence and position of the printing form on the forme cylinder, allowing for reliable detection of non-conductive materials and enabling accurate alignment without the need for additional installation space or external sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sensors are used to detect printing forms, then detection is possible for conductive materials, but detection fails for non-conductive or transparent materials like plastic printing forms
Solution Approach 1:
The patent replaces conventional contact-based or conductive sensors with an optical sensor system that uses light reflection principles. This substitution enables detection of non-conductive and transparent materials by detecting changes in light reflection patterns when the printing form is present on the forme cylinder, rather than relying on electrical conductivity or mechanical contact.
Solution Approach 2:
The optical sensor detects the presence of the printing form by monitoring changes in light reflection characteristics. When the printing form is mounted on the forme cylinder, it alters the reflection pattern of light emitted by the sensor, allowing detection regardless of the material's conductivity or transparency properties.
2Measurement precision
If additional external sensors are installed to improve detection capability, then detection accuracy improves, but installation space and device complexity increase
Solution Approach 1:
The optical sensor system serves multiple functions: it detects the presence of the printing form, determines its position on the forme cylinder, and provides alignment information. By integrating these detection capabilities into a single sensor unit mounted on the forme cylinder, the system achieves high measurement precision without requiring multiple separate sensors or additional installation space.
Solution Approach 2:
The patent combines presence detection and position measurement functions into a single optical sensor system. The sensor is integrated into the forme cylinder structure, merging the detection functionality with the existing mechanical components rather than adding separate external sensing systems.
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 enhances the productivity of printing presses by allowing for reliable detection and alignment of printing forms, regardless of material conductivity, and reduces the need for additional space and equipment, improving the overall efficiency of the printing process.
Implementation Method 1
The implementation of an optical sensor, specifically a reflection light scanner, is used to detect the presence and position of the printing form on the forme cylinder
Data Source
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AI summary
The invention relates to a printing machine having a device for detecting the presence of an application forme (87) on a forme cylinder (63), wherein the forme cylinder (63) has at least one cylinder channel (93), wherein at least one fastening system (64) for fastening the application forme (87) is arranged in the at least one cylinder channel (93), wherein the at least one fastening system (64) has at least one alignment element (89) for aligning an application forme (87), and wherein the at least one fastening system (64) has at least one sensor (100) which optically detects the presence of the application forme (87).