Numbering Printer Type Wheel Engraving Offset for Security Documents
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Solution Overview
Problem
Existing numbering printing units for security documents, such as banknotes, require multiple units and complex alignment to achieve a forgery-proof character string deviating from linear alignment, leading to high equipment and time costs.
Innovation Solution
A single numbering printing unit with at least three type wheels, where two wheels specify linear alignment and the third prints characters offset, allowing for a character string with a defined geometry that deviates from linear alignment, enhancing security and simplifying the printing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple numbering printing units are used to print character sequences deviating from linear orientation, then counterfeit protection is increased, but device complexity and alignment requirements increase significantly
Solution Approach 1:
The patent combines multiple numbering printing units into a single integrated unit. The merged unit contains multiple type wheels (at least three) that can print characters in different positions and orientations simultaneously, eliminating the need for separate printing units and their complex alignment while maintaining the ability to produce non-linear character sequences for counterfeit protection
Solution Approach 2:
The single numbering printing unit is designed with multi-functionality by equipping it with multiple type wheels that can perform different printing functions. Each type wheel can be configured with engravings at different positions to print characters at various offsets from the central axis, allowing one unit to replace multiple specialized units while maintaining versatility in producing different character sequence patterns
2Reliability
If two numbering printing units with blind numerals are used to create non-linear character sequences, then security is enhanced, but manufacturing complexity and production time increase
Solution Approach 1:
The patent merges the functionality of two separate numbering printing units into one unit. The combined unit has multiple type wheels that can print both regular and blind numerals in a single printing operation, eliminating the need for sequential printing by two units and their precise alignment, thereby simplifying manufacturing while maintaining security
Solution Approach 2:
The type wheels are pre-configured with engravings at specific positions during manufacturing. The engravings are positioned at predetermined offsets from the central axis to create the desired non-linear character sequence pattern. This preliminary configuration of engraving positions allows the single unit to automatically produce secure non-linear patterns without requiring complex real-time alignment during operation
3Reliability
If characters are printed in non-linear orientation using multiple printing units, then forgery resistance increases, but printing time and equipment costs increase
Solution Approach 1:
The patent combines multiple printing operations into a single printing pass using one numbering printing unit with multiple type wheels. All characters in the non-linear sequence are printed simultaneously in one operation rather than requiring multiple sequential printing passes, thereby maintaining forgery resistance while significantly improving printing speed and equipment efficiency
Solution Approach 2:
The single numbering printing unit performs all printing operations continuously in one uninterrupted action. The multiple type wheels rotate and print their respective characters in a coordinated continuous motion, eliminating the stopping, aligning, and repositioning required when using multiple separate units, thus maintaining security while enhancing productivity
Data Source
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AI summary
A numbering printing unit for printing a sequence of characters on a security document, in particular for printing banknotes and/or securities, comprising several adjacent typewheels (1, 2, 3, 4, 5), wherein each of the typewheels has circumferentially spaced printing surfaces (6) and wherein engravings for generating a character are arranged on the printing surfaces, is characterized in that the positioning of the engravings on the printing surfaces differs between at least two of the typewheels, so that the sequence of characters (8) can be printed on the security document in a manner deviating from a linear orientation. Furthermore, a corresponding security document is specified.