Variable-Format Web Printing Press Cutting Module
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Solution Overview
Problem
Web printing machines with fixed cylinder circumferences are inefficient for small and very small print runs, as they cannot economically or technically optimize print formats, leading to high manufacturing costs and lengthy setup times for changing formats.
Innovation Solution
A variable-format web printing press without rotating printing cylinders, using contactless printing devices like inkjet systems and a control device to regulate cutting devices, allowing for flexible print formats and orientations, and a folding apparatus with displaceable folding devices to adapt to various print formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed cylinder circumferences are used in web printing machines, then the printing process is stable and reliable, but the adaptability to different print formats is limited and manufacturing costs increase for small runs
Solution Approach 1:
The patent applies the dynamics principle by replacing fixed printing cylinders with a dynamic system consisting of a flexible printing belt and adjustable folding devices. The printing belt can be tensioned and adjusted to accommodate different circumferences, while the folding devices can be repositioned to match various print format requirements. This dynamic configuration allows the same printing press to efficiently produce different formats without being constrained by fixed cylinder dimensions.
2Loss of time
If fixed print formats are used throughout the printing machine lifespan, then setup time and manufacturing costs are reduced for large runs, but the machine cannot economically produce small or variable runs
Solution Approach 1:
The patent implements universality by designing a printing system where the folding devices and printing belt can be adjusted to serve multiple print format functions. The folding devices can be repositioned along the printing belt to create different fold patterns and formats, allowing the same machine to economically produce both large and small runs, as well as various formats including book printing, newspaper printing, and illustration printing without requiring dedicated setups for each format type.
3Device complexity
If rotating printing cylinders with fixed circumferences are used, then the printing mechanism is simple and reliable, but the device complexity increases when attempting to accommodate variable formats
Solution Approach 1:
The patent applies mechanics substitution by replacing the traditional rigid rotating printing cylinders with a flexible printing belt system. Instead of changing the fundamental mechanical structure to accommodate different formats, the system uses a flexible belt that can be tensioned and adjusted, combined with repositionable folding devices. This substitution maintains mechanical simplicity while enabling format variability, as the same basic belt-driven mechanism can accommodate different circumferences and formats through adjustment rather than structural change.
Data Source
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AI summary
A device (103) for cutting printing materials, in particular paper webs (108), is described, comprising a cutting module (106) which includes a cutting device (6), as well as a folding device and a printing machine with such a device, wherein the cutting module (106) has guide devices (206, 208) which have at least a partially flat and/or movable guide area (F1, F2) for guiding the printing material or the paper web (108) through the cutting module (106).