Watermark Paper Dewatering Screen for Continuous Security Patterns
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Solution Overview
Problem
Current methods for producing watermark paper fail to create visually attractive and highly resistant watermarks that extend across the entire length or width of the paper, making them susceptible to forgery.
Innovation Solution
A dewatering screen with alternating high-resolution multi-stage and filigree watermark reliefs, or screen-embossed reliefs, that span individual use areas, providing a continuous visual impression and increasing the technological barrier to counterfeiting by extending watermarks across the entire panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If watermark reliefs are confined to individual panels using conventional methods, then production is simpler, but visual attractiveness and security resistance are reduced
Solution Approach 1:
The patent merges watermark reliefs across multiple individual panels to form continuous watermarks that span the entire paper web. This is achieved by arranging watermark reliefs in adjacent panels to create seamless visual patterns, thereby enhancing security resistance while managing complexity through systematic positioning.
Solution Approach 2:
The patent extends watermarks from two-dimensional patterns within single panels to three-dimensional continuous structures spanning multiple panels. This dimensional expansion creates more complex visual patterns that are harder to counterfeit while maintaining production feasibility through structured relief arrangements.
2Reliability
If watermark reliefs extend across entire paper web, then security is enhanced, but production complexity increases
Solution Approach 1:
The patent segments the continuous watermark pattern into discrete relief elements positioned in individual panels. Each panel contains specific watermark relief segments that, when assembled across multiple panels, form the complete continuous watermark. This segmentation simplifies manufacturing by allowing independent panel production while achieving the overall security enhancement.
Solution Approach 2:
The patent applies watermark reliefs to individual panels during the papermaking process before the panels are fully assembled into the complete paper web. This preliminary application of watermarks to individual units simplifies the overall manufacturing process by allowing parallel production of multiple panels with pre-positioned watermarks that will form continuous patterns when assembled.
3Reliability
If high-resolution multi-level watermark reliefs are used, then visual attractiveness and security are improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies high-resolution multi-level watermark reliefs selectively to specific regions within panels rather than uniformly across the entire paper web. This local application of high-resolution reliefs enhances security and visual attractiveness in critical areas while reducing overall manufacturing complexity by using simpler relief structures in other regions.
Solution Approach 2:
The patent combines different types of watermark reliefs (high-resolution multi-level reliefs, filigree reliefs, and conventional reliefs) within the same paper web. This composite approach allows the integration of various relief structures with different security properties, enhancing overall security resistance while managing manufacturing complexity through the strategic combination of different relief types.
Data Source
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AI summary
The invention relates to a security paper web (20) comprising a plurality of individual panels (26), which are arranged in a grid-type manner along a longitudinal direction (MD) and a transverse direction (QD) of the security paper web, wherein the security paper web (20) with the individual panels (26) is provided with watermarks (12), which are formed at least in sub-regions (14) as high-definition multi-level watermarks and/or as filigree watermarks. According to the invention, the watermarks (12) are registered to the individual panels (26) and, at least in sub-regions, the individual panels (26) are arranged overlapping on the security paper web (20). The invention also relates to a dewatering screen (30) for producing a corresponding watermark paper.