Patent · US Expired

Anti-copy film layer for documents

US5728449A · kind A · utility

16Cited by

3References

27Claims

0Family size

Assignee

Emtec Magnetics GmbH · DE

Inventors

Helmut Steininger · Neu-Anspach, DE
Peter Heilmann · Bad Dürkheim, DE
Peter Hewkin · Cambridge, GB

Key dates

Filing date	Feb 13, 1995
Grant date	Mar 17, 1998
Priority date	—
Expiry date	Feb 13, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31504
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

An anti-copy film or layer for originals or documents comprises according to the invention transparent film material having a multiplicity of at least partially opaque and possibly reflective areas arranged at distances from one another which are arranged as screens on the film surfaces essentially in horizontal planes, in particular parallel to one another, but offset, so that information on an original lying under this film or layer is masked in an approximately vertical viewing direction and is visible in the direction of a predefined viewing angle. Expedient production methods enable the use of photographic techniques.

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