| 摘要 |
The invention relates to a device for embossing and/or satin-finishing a fla t material, comprising at least two embossing rolls that are linked with a dri ve and that can be driven individually or jointly. The rolls can be elastically pressed against each other and the pyramidal teeth of the rolls have a flattened tip. In order to produce an embossed structure with variable optic al effects the teeth (T2) of at least one of the rolls are adapted to provide t he flat material, especially the metallized packaging foil, with a sign (L) who se aspect varies depending on the visual angle of the viewer (O) and/or kind and/or location of the source of light (LS). These teeth (T2) have, for example, a height that is inferior to that of the remaining teeth (T1). The inventive device allows not only production of special effects by embossing but also production of security features that are especially forgery-proof.< /SDOAB> |
