FOIL COMPOSITE CARD

摘要

Composite cards formed in accordance with the invention include a security layer comprising a hologram or diffraction grating formed at or in the center, or core layer of the card. The hologram may be formed by embossing a designated area of the core layer with a diffraction pattern and depositing a thin layer of metal on the embossed layer. Additional layers may be selectively and symmetrically attached to the top and bottom surfaces of the core layer. A laser may be used to remove selected portions of the metal formed on the embossed layer, at selected stages of forming the card, to impart a selected pattern or information to the holographic region. The cards may be “lasered’ when the cards being processed are attached to, and part of, a large sheet of material, or after the sheets are die-cut into cards.

主权项

1. A method for forming a document comprising the steps of:
forming a pattern on a surface of a clear plastic sheet defining the core layer of said document; vapor depositing one of thin layer of a selected metal and a metal compound on a designated area of the formed pattern for producing a patterned layer and causing a light pattern to be produced corresponding to the formed pattern in response to incident light; attaching a selected number of clear plastic buffer layers to the patterned layer formed on said surface of the core layer arbitrarily defining said surface as the top surface, and a like number of clear plastic buffer layers on the bottom surface of the core layer; the first clear plastic layer being of approximately the same thickness as the second clear plastic layer: and selectively modifying the thin layer of said selected metal and metal compound to customize the document.