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.:
Date of Patent:
Sep. 03, 2013
Filed:
Sep. 13, 2002
Wittich Kaule, Emmering, DE;
Karlheinz Mayer, Augsburg, DE;
Bernd Stumbeck, Waakirchen, DE;
Wolfgang Wensauer, Gmund, DE;
Guenther Wild, Hausham, DE;
Thomas Gerhardt, Munich, DE;
Andreas Aigner, Valley, DE;
Wittich Kaule, Emmering, DE;
Karlheinz Mayer, Augsburg, DE;
Bernd Stumbeck, Waakirchen, DE;
Wolfgang Wensauer, Gmund, DE;
Guenther Wild, Hausham, DE;
Thomas Gerhardt, Munich, DE;
Andreas Aigner, Valley, DE;
Giesecke & Devrient GmbH, Munich, DE;
Abstract
A screen for producing two-level watermarks is produced by completely closing part of the screen with a viscous sealing compound, which is subsequently cured actively or passively. At the thus closed partial areas of the screen, paper deposit is hindered during papermaking so that the finished paper appears light in transmission in the areas. A mask is used for exactly positioning the sealing compound in the partial areas of the screen and/or for curing the sealing compound only in the given partial areas, whereby in the latter case the uncured areas of the sealing compound are washed out.