Patent ID: 9738106
Date: 2017-08-22
CPC Classifications: B41M,B42D,B44F,H04N

Claim:
1. A method of digitally on demand printing a security feature onto an original document containing text, which protects the text of the original document from unwanted optical character recognition, comprising: digitally generating a security feature as an electronic bitmap art file, wherein the security feature includes amplitude halftone elements and frequency modulated halftone elements which are modified, calibrated and customized to a printing device, wherein said amplitude modulated halftone elements are placed at uniform frequencies and the size of said amplitude modulated halftone elements vary and said frequency modulated halftone elements are placed randomly and the size of said frequency modulated halftone elements are fixed; digitally printing with said printing device the digitally produced security feature and text onto a document at the same time; creating an original document with a security feature and text positioned over and beside said security feature to form a printed area, wherein the security feature is located under only a portion of said printed area of said original document, and renders the text anti-OCR; and scanning said original document and performing optical character recognition on said original document, wherein said scanning reproduces said amplitude modulated halftone elements and said frequency modulated halftone elements and upon optical character recognition at least a portion of said text positioned over said amplitude modulated halftone elements and frequency modulated halftone elements of said security feature is illegible and non-readable.