Correlated three-layer microtext
AssigneeXerox Corporation
InventorEdward N. Chapman
Life of this patent
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Abstract
A method, apparatus and system for rendering a security mark, can involve providing two variable layers of data text for a security mark including a first variable layer and a second variable layer, and applying the security mark to a recording medium using the two variable layers to create a third variable layer of the security mark. The second variable layer can be applied out of phase or orthogonally from the first variable layer at the same frequency, which can form the third variable layer with data text that is decodable. The third variable layer with the data text can be decodable with a decoding screen. In addition, the first, second, and third variable layers can share the same area. The security mark may comprise a correlation mark.
Claims20
A method of rendering a security mark, comprising:
- providing two variable layers of data text for a security mark including a first variable layer and a second variable layer;
- and
- applying the security mark to a recording medium using the two variable layers to create a third variable layer of the security mark, wherein the second variable layer is applied out of phase or orthogonally from the first variable layer at a same frequency, which forms the third variable layer with data text that is decodable, wherein the third variable layer with the data text is decodable with a decoding screen.
A method of rendering a security mark, comprising the following steps:
- a) defining a security mark with a frequency;
- b) creating a microfont with a period less than a fraction of the frequency;
- c) defining the security mark with an angle that is limited by the microfont;
- d) defining a first variable data string, a second variable data string, and a third variable data string;
- e) writing the first variable data string at the angle and the frequency using the microfont;
- f) writing the second variable data string out of phase or orthogonally from the angle and at the frequency using the microfont.
A security apparatus, comprising:
- a security mark having two variable layers of data text including a first variable layer and a second variable layer;
- and
- a third variable layer of the security mark, wherein the security mark is applied to a recording medium using the two variable layers to create the third variable layer of the security mark, wherein the second variable layer is applied out of phase from or orthogonal to the first variable layer at a same frequency, which forms the third variable layer with data text that is decodable, wherein the third variable layer with the data text is decodable with a decoding screen.
Dependencies are inferred from the claim text.