| 摘要 |
A copyproof document includes a paper document substrate, a disc having a primarily holographic first face facing away from the substrate and a second face with permanent pressure sensitive adhesive engaging the substrate, and mechanical intertwining between the substrate and disc so that they are substantially inseparable. The mechanical intertwining enables the materials thereof become substantially inseparably intertwined, the permanent adhesive also acting to insure inseparability. Typically the parameter of the disc will be a mechanically intertwined with the substrate while at the center there is little or no mechanical intertwining so that the holographic activity of the first face is not significantly occluded. Unique identifying indicia (e.g. consecutive numbers or bar coding) may also be provided on the disc, and application of the discs to a document may not be practiced without security authorization and access (by key, computer, or the like). Also, the number of discs (and typically their unique identification indicia) may be recorded once applied to documents. The positioning of the discs in place with respect to the substrate and the mechanical intertwining step may be accomplished manually or automatically, the mechanical intertwining typically being accomplished by moving first and second cooperating dies to sandwich a disc and substrate between them. The discs may be fed on a web of release material to the document at an area between the dies, the web passing around a release roller which facilitates release of the discs from the web.
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