Agfa-Gevaert

Agfa Gevaert Nv

Michel Boulonne

Leon L Vermeulen

Leo Vermeulen

Walther Wouters

Diane Vertruyen

Serge M Tavernier

Stefaan K De Meutter

Guido Vital Desie

Huub Van Aert

Dirk K Broddin

According to the present invention there is provided a laminating element comprising a transparent support coated with a thermally non-reversible layer comprising an ethylene-acrylic acid copolymer, a first polyurethane polymer and a second polyurethane polymer, said layer having a pH of at least 10 and containing a metallic or an amphoteric cation.

Security document comprising a mixture of polyurethanes

According to the present invention there is provided an imaged element comprising an optical card and underneath a layer package comprising in the order given an optional image receiving layer, a prelayer, an interlayer and a transparent support, at least the optional image receiving layer or the prelayer comprising an image, characterized in that the interlayer contains a polyurethane and a cross-linking agent.

Optical card comprising an imaged layer

A method for printing information on a substrate having security features includes the steps of: applying a DC potential difference (DC.sub.TB) between a back electrode and a toner delivery means to create a flow of toner particles from the toner delivery means to the back electrode; interposing a printhead structure, the printhead structure having printing apertures and control electrodes around the printing apertures, between the toner delivery means and the back electrode so as to create a spacing having a width L between the printhead structure and the back electrode and to imagewise control the flow of toner particles; passing the substrate having a thickness T in .mu.m through the spacing; adjusting the spacing between the printhead structure and the back electrode such that the width of the spacing L is greater than or equal to 1.5 T; adjusting the DC potential difference (DC.sub.TB) such that the relationship .vertline.DC.sub.TB .vertline./L, expressed in volts per micrometer (V/.mu.m), is greater than or equal to 1.0; imagewise depositing the toner particles on the substrate through the printing apertures; and fixing the toner particles to the substrate.

Method and device for printing information on substrates having security

An apparatus for security printing of a document on a substrate, having a first and second side, comprising:

Apparatus for security printing using toner particles

Growing community of inventors

Kappelle-op-den-Bos, Belgium

Michel Boulonne