Gas separation: apparatus – Electric field separation apparatus – With means to add charged solid or liquid particles to...
Patent
1974-07-11
1978-06-27
Kimlin, Edward C.
Gas separation: apparatus
Electric field separation apparatus
With means to add charged solid or liquid particles to...
96 28, 40 22, 156234, 156240, 156277, 427 54, 427145, 427146, 427180, 427197, 283 7, G03C 504, G03C 1112
Patent
active
040972798
ABSTRACT:
A process for preparing identification cards which comprises spreading bonding material on a substrate, placing a transparent film over the coated substrate, superposing a photograph having opaque and transparent portions, directing light rays to harden portions of the bonding material which correspond to the transparent parts of the photograph, spreading particulate material over the bonding material, removing the particulate material that has not adhered to the bonding material, and sealing a transparent covering. An identification card comprising a thermoplastic coated magnetic backing means, large number of individual particles arranged to constitute a photographic image bonded to the thermoplastic coated backing means, and a transparent covering overlying the backing and heat sealed thereto. Also provided is a unitary laminated identification card that has a three-dimensional effect which cannot be readily photographically counterfeited and is substantially tamper-proof.
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Hall William D.
Kimlin Edward C.
Myers Geoffrey R.
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