Process for the production of an anticopy film

US6033516A · kind A · utility

Assignee

• Emtec Magnetics GmbH · DE

Inventors

• Helmut Steininger · Neu-Anspach, DE
• Peter Heilmann · Bad Dürkheim, DE
• Michael Willis · Saguenay, CA

Key dates

• Filing date: Jul 14, 1994
• Grant date: Mar 7, 2000
• Expiry date: Jul 14, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24612
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

In the production of an anticopy film serving for covering documents against copying, opaque, strip-like coverings are applied by printing to the individual layers of a transparent, multilayer film in a mutually offset arrangement in such a way that the film appears opaque in the plan view, but transparent in an inclined viewing direction. To this end, a film web is printed with the coverings in sections corresponding to the layers, and the sections are subsequently folded over to give the layers.