Patent ID: 6318758
Filing Date: 2001-11-20
Classification: B42D,Y10T

Abstract:
A security document (1) comprising a document substrate and a security element (2), said security element (2) having at least a first layer (6) with first gaps (9) which form negative characters readable upon transmission of light through said document and a magnetic layer (5) disposed below said first layer (6), said first layer superposed on said magnetic layer, said magnetic layer (5) having second gaps (8) in the form of a magnetic coding and said first gaps (9) of said first layer (6) extending through said magnetic layer (5) where no second gaps (8) are located in said magnetic layer (5), wherein said first gaps (9) of said first layer (6) are an order of magnitude smaller than said second gaps (8) of said magnetic layer (5) such that readability of said coding in said magnetic layer (5) is not impaired in areas where said first gaps (9) extend through said magnetic layer (5).