# US 8,465,625 B2 · Security paper and method and apparatus for producing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,625 B2 - Document ID: US8465625B2 - Status: Granted - Kind: B2 - Application number: 10/499,107 - Filed: 2002-12-17 - Published: 2005-10-13 - Granted: 2013-06-18 - Earliest claimed: 2001-12-21 - Assignees: Giesecke & Devrient GmbH - Applicants: Michael Boehm; Horst Reigl; Theo Burchard - Inventors: Michael Boehm; Horst Reigl; Theo Burchard - Web page: https://patentgrep.com/patent/US8465625B2 ## CPC - D21H 21/40: Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper (watermarking B41M3/10, D21F1/44; security printing B41M3/14; securities or banknotes characterised by colour effects B42D25/29, B42D25/30; testing paper currency or valuable papers for genuineness G07D7/00) - B42D 25/29: Securities; Bank notes - D21F 1/44: Watermarking devices - B42D 25/333: Watermarks - B42D 25/346: Perforations - D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR - B42D: BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS - D21F: PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON ## Abstract A security paper for producing security documents, such as bank notes, identity cards or the like, having at least one opening, whereby the opening is produced during papermaking and does not have a sharp limiting edge in the edge area. ## Claims ### Claim 1 A value document comprising a security paper, wherein the value document has a first exposed surface side and a second exposed surface side opposite the first surface side and further has at least one through opening extending unobstructed from the first surface side through to the second surface side and including an edge area defining the perimeter of the through opening, whereby the through opening is produced during formation of the security paper on a papermaking screen and the edge area of the through opening consists of paper fiber. ### Claim 2 (depends on 1) The value document according to claim 1, characterized in that the security paper has at least one watermark in the surroundings of the opening. ### Claim 3 (depends on 2) The value document according to claim 2, characterized in that the security paper has a smaller paper thickness in the area of the watermark. ### Claim 4 (depends on 2) The value document according to claim 2, characterized in that the opening and the surrounding watermark are meaningfully related or form a connected motif. ### Claim 5 (depends on 1) The value document according to claim 1, characterized in that the security paper has a predetermined paper thickness and an area with a smaller paper thickness in comparison with the predetermined paper thickness, and in that the opening is disposed in the area of smaller paper thickness and has dimensions which are smaller than those of the area of smaller paper thickness. ### Claim 6 (depends on 1) The value document according to claim 1, further including a security element disposed in an area surrounding the opening. ### Claim 7 (depends on 6) The value document according to claim 6, characterized in that the security paper has a depression surrounding the opening and having the security element disposed therein. ### Claim 8 (depends on 6) The value document according to claim 6, characterized in that the security element has at least one layer consisting of paper or plastic. ### Claim 9 (depends on 6) The value document according to claim 6, characterized in that the security element has at least one security feature. ### Claim 10 (depends on 9) The value document according to claim 9, characterized in that the security feature comprises a diffraction structure, a thin-film element, a polarizing filter or a print having at least one substance with optically variable, luminescent, electrically conductive or magnetic properties. ### Claim 11 (depends on 9) The value document according to claim 9, characterized in that the security feature and at least one watermark surrounding the opening are meaningfully related or form a connected motif. ### Claim 12 The value document according to dam 6, characterized in that the security element is a label or an embossed foil element. ### Claim 13 (depends on 6) The value document according to claim 6, characterized in that at least one of the opening and the security element is circular, oval, rectangular, trapeziform or star-shaped. ### Claim 14 (depends on 6) The value document according to claim 6, characterized in that the security element is formed in a strip shape. ### Claim 15 (depends on 6) The value document according to claim 6, characterized in that the security element has at least one transparent area in the area of the opening. ### Claim 16 (depends on 1) The value document according to claim 1, wherein the papermaking screen is provided with at least one water-impermeable sealing element to produce the through opening.