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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12252846 B1

PDFFull Text
Date of Patent:
Mar. 18, 2025

Filed:

Mar. 25, 2021

Multi-layer printing substrate with hidden information

Applicant:

Landqart Ag, Landquart, CH;

Inventors:

Christoph Kocher, Landquart, CH;

Muriel Schuler, Chur, CH;

Martin Demierre, Nyon, CH;

Assignee:

Landqart AG, Landquart, CH;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Justin V Lewis

Int. Cl.
CPC ...
D21H 27/36 (2006.01); A63F 3/06 (2006.01); B26F 1/38 (2006.01); B32B 3/26 (2006.01); B32B 27/08 (2006.01); B32B 27/18 (2006.01); B42D 25/328 (2014.01); B42D 25/351 (2014.01); B42D 25/46 (2014.01); D21H 21/42 (2006.01); D21H 21/44 (2006.01); D21H 23/46 (2006.01); B41M 3/14 (2006.01); B42D 25/305 (2014.01); B42D 25/355 (2014.01); B42D 25/369 (2014.01); B42D 25/378 (2014.01);
U.S. Cl.
CPC ...
D21H 27/36 (2013.01); B26F 1/38 (2013.01); B32B 3/266 (2013.01); B32B 27/08 (2013.01); B32B 27/18 (2013.01); B42D 25/328 (2014.10); B42D 25/351 (2014.10); B42D 25/46 (2014.10); D21H 21/42 (2013.01); D21H 21/44 (2013.01); D21H 23/46 (2013.01); A63F 3/069 (2013.01); B32B 2260/028 (2013.01); B32B 2260/046 (2013.01); B32B 2307/718 (2013.01); B32B 2554/00 (2013.01); B41M 3/14 (2013.01); B42D 25/305 (2014.10); B42D 25/355 (2014.10); B42D 25/369 (2014.10); B42D 25/378 (2014.10);
Abstract

A security paper, having a first paper ply and a second paper ply, and a plastic ply made of a thermoplastic polymer material arranged between the paper layers (), wherein a strip-shaped tear-off film is embedded between the paper layers on the inner side of the second paper layer and at least partially embedded into the plastic layer. Hidden information is arranged on the inner side of the first paper ply and is covered by the strip-shaped tear-off film or is arranged on the surface of the strip-shaped tear-off film facing the first paper ply. The hidden information can be exposed by the strip-shaped tear-off film together with a strip of the second paper ply being irreversibly torn off the multi-layer substrate.

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