The invention relates to a dewatering screen for the production of paper having multi-layer water marks, having a carrier screen (54) comprising a multi-layer relief (30) in the form of the water mark to be produced in a partial region. The invention provides that the multi-layer relief is formed by an injection-molded, perforated (40) water mark insert (30).

Dewatering screen and method for the production thereof

The present invention relates to the field of paper and relates to a sheet including a high-definition high-contrast multitone watermark having areas of pronounced brightness. Such watermark is particularly obtained by means of a part (4) including a surface (5) having a raised area and perforations (6). The perforations (6) are such that making the cross-section thereof, at a given distance from the draining surface, directly depends on said distance. The present invention also relates to the method for manufacturing said part that is used for forming one such watermark, to the part itself, and to the use of said part when forming a watermark.

Sheet having multitone watermark, method for manufacturing part for forming multitone watermark, part for forming multitone watermark, and use of said part for forming multitone watermark

According to one aspect, the invention relates to a method for producing a watermark element (10) for forming a shadow watermark image in a substrate by means of dewatering of a fibrous suspension, wherein the watermark element (10) comprises a body with a relief side (12) having a relief (14) and a dewatering side (16) positioned opposite the relief side, perforations (18) being provided at least in the relief (14), a perforation (18) comprising a channel (20) with a channel inlet (21) at the relief side (12) and a channel outlet (22) at the dewatering side (16), which method includes the steps of forming perforations in a body in a mechanical manner and introducing a relief in the intended relief side, the perforations (18) being formed in such a way that the dewatering capacity, expressed as the open surface area of the channel inlet(s) per unit of surface area of the relief, is dependent on the height (h) of the channel inlet (21) with respect to the dewatering side (16), it being the case that the higher the height, the lower the dewatering capacity.

Method for producing a watermark element, watermark element, and also applications

A method for providing a watermarking wire mesh (1), particularly for producing security paper and the like, comprising in sequence the following steps: - associating stably at least one electrotype element (2) or the like at a preset region (3) of a first working face (1a) of a watermarking wire mesh (1); - deforming plastically at least one predefined portion (4) of the watermarking wire mesh (1), which comprises at least partially the at least one electrotype element (2) or the like.

Method for providing a watermarking wire mesh, watermarking wire mesh, apparatus for obtaining it and anti-counterfeiting document

The invention relates to improvements in methods of making security features, in particular electrotype security features. The electrotype for forming an image during a paper making process comprises a mesh to which is attached at least one image forming element.

Electrotype for forming an image during a paper making process

Die Erfindung betrifft ein Entwasserungssieb fur die Herstellung von Papier mit mehrstufigen Wasserzeichen, mit einem Tragersieb (54), das in einem Teilbereich ein mehrstufiges Relief (30) in Form des zu erzeugenden Wasserzeichens aufweist. Erfindungsgemas ist vorgesehen, dass das mehrstufige Relief durch einen spritzgegossenen, perforierten (40) Wasserzeicheneinsatz (30) gebildet ist.

Entwässerungssieb und Verfahren zu seiner Herstellung

In a process to manufacture paper for e.g. banknotes or security documents, the paper suspension is surrendered to a sieve with an irregular cross-sectional profile, resulting in the formation of a watermark at different depths. The sieve is a combined plastic and bronze gauze formed of warp and weft threads. Also claimed is a process to manufacture the sieve.

Sieve to de-water paper suspension for conversion to banknotes or security documents has combined plastic and bronze gauze

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Günter Wild

Author Tools

Chat about Author

Papers

Entwässerungssieb und Verfahren zu seiner Herstellung

Sieve to de-water paper suspension for conversion to banknotes or security documents has combined plastic and bronze gauze