Electronic verification machine for documents
First Claim
1. A circuit for stigmatizing a document having a fuse element comprising:
- first and second pads disposed to the document and aligned with the fuse element;
a voltage supply for generating a predetermined DC voltage;
control means for controlling said circuit;
a switch, operatively connected to said control means, and connected between said voltage supply and said first pad for selectively applying a DC voltage to the fuse element from said voltage supply via said pad; and
a voltage discharge connected to said second pad.
1 Assignment
0 Petitions
Accused Products
Abstract
Determination of the authenticity and integrity of various types of documents such as lottery tickets is accomplished by using an electronic verification machine to compare data contained in electronic circuits printed on the document to document data printed on the document. The electronic circuits are printed on the document in conductive or semiconductive ink using, for example, the gravure printing process, and the presence and status of the circuits can be used to verify or authenticate the document. Data can be represented in the electronic circuits by the electrical signature of the circuit which is measured by the electronic verification machine. In the case of lottery tickets, a ticket can be validated by having the electronic verification machine determine which play spots have been removed from the ticket and comparing data on the ticket with the removed play spots to determine a play redemption value for the ticket. Document verification or lottery ticket validation can also be accomplished by transmitting signature data from the electronic circuits via the electronic verification machine to a central computer for comparison with document data.
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Citations
10 Claims
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1. A circuit for stigmatizing a document having a fuse element comprising:
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first and second pads disposed to the document and aligned with the fuse element;
a voltage supply for generating a predetermined DC voltage;
control means for controlling said circuit;
a switch, operatively connected to said control means, and connected between said voltage supply and said first pad for selectively applying a DC voltage to the fuse element from said voltage supply via said pad; and
a voltage discharge connected to said second pad. - View Dependent Claims (2, 3, 4)
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5. A circuit for stigmatizing a lottery ticket having a fuse element comprising:
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an excitation pad;
a ground pad;
an alignment mechanism, for aligning said excitation pad and said ground pad with fuse element;
a voltage supply for generating a predetermined DC voltage; and
controller means operatively said voltage supply and said alignment mechanism for aligning said fuse element with said excitation and ground pads, applying said DC voltage to said fuse element and determining if said fuse element has been opened. - View Dependent Claims (6, 7)
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8. An electronic verification machine for a document comprising:
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a sensor plate;
an excitation plate;
an alignment mechanism for aligning the document with said sensor plate and said excitation plate;
signal application means for applying an AC signal to said excitation plate;
detection means operatively connected to said sensor plate for generating a signal representing the thickness of the document. - View Dependent Claims (9, 10)
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Specification