Patent · US Active

Method and device for manufacturing a sheet-like substrate

US9243366B2 · kind B2 · utility

0Cited by

7References

11Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

Andreas Pretsch · Holzkirchen, DE
Bernhard Wiedner · Miesbach, DE
Manfred Heim · Munich, DE
Michael Dornfeld · Indianapolis, US
Johannes Kemper · Nieuwegein, NL
Johannes Beier · Holzkirchen, DE

Key dates

Filing date	Oct 4, 2012
Grant date	Jan 26, 2016
Priority date	—
Expiry date	Oct 4, 2032

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H21/42
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A method includes manufacturing a sheet-type substrate having a security thread in which a security thread having features spaced apart from one another in the longitudinal direction of the security thread is inserted into the substrate in such a way that it is at least partially embedded in the substrate. At least one of the features is displayed as an image after the embedding of the security thread. The stretch of the embedded security thread in the longitudinal direction is calculated based on the image of the at least one feature, and the region of the substrate in which the calculated stretch of the security thread exceeds a specified maximum stretch is obliterated depending on the calculated stretch.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.