Security document and method for making same using an alternating dot pattern
First Claim
Patent Images
1. An improved security document comprising:
- a substrate having a top surface for carrying indicia;
background printed matter on said top surface, said background printed matter made up of a pattern of small elements of substantially the same size and of a uniform frequency; and
,a cancellation term also printed on said top surface of said substrate, said cancellation term composed of an area pattern consisting of at least two sizes of elements uniformly spaced in an intermingling, alternating pattern and occurring with the same combined contiguous frequency as said elements of said background printed matter.
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Abstract
An improved copy-proof document is disclosed having a cancellation phrase with an alternating dot pattern which enhances both the detail rendition and protection of such documents. The method of making such a document by preprinting the cancellation phrase in a single tone pattern of alternating dot sizes is also disclosed.
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Citations
7 Claims
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1. An improved security document comprising:
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a substrate having a top surface for carrying indicia; background printed matter on said top surface, said background printed matter made up of a pattern of small elements of substantially the same size and of a uniform frequency; and
,a cancellation term also printed on said top surface of said substrate, said cancellation term composed of an area pattern consisting of at least two sizes of elements uniformly spaced in an intermingling, alternating pattern and occurring with the same combined contiguous frequency as said elements of said background printed matter. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An improved security document comprising:
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a substrate having a top surface for carrying indicia; background printed matter on said top surface, said background printed matter made up of a uniform pattern of small elements of substantially the same size and of a uniform frequency; and a cancellation term also printed on said top surface of said substrate, said cancellation term consisting of a plurality of first size elements arranged in a uniform array and occurring at one-half the frequency of said background printed matter elements and having a size larger than said background printed matter elements, and of a plurality of second size elements arranged in a uniform array which is intermingled between said first size elements and occurring at one-half the frequency of said background printed matter elements and having a size smaller than said background printed matter elements, such that said array of said first size elements, said array of said second size elements and said pattern of said background printed matter elements are all in register.
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Specification