Information recording and recognition
First Claim
1. A method of information recording and recognition comprising the steps of printing on one surface of a recording member information in the form of ink deposits where such ink deposits contain a substance capable of conferring to such ink deposits electrical conductivity measurable different from that of the non-printed background areas of said recording member, passing said recording member through an information recognition zone, positioning corona generating means adjacent said information recognition zone and directing the ionic emission from said corona generating means towards one face of said recording member, positioning sensor means in said information recognition zone to detect ionization and ion emission changes effected by electrical conductivity differences between said printed ink deposits and non-printed background areas on said recording member and converting the thus detected ionization and ion emission changes into an electrical signal corresponding to said information.
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Abstract
A method of information recording and recognition comprising printing on one surface of a recording member information in the form of ink deposits having electrical conductivity measurable different from that of the non-printed background areas, passing the recording member through an information recognition zone containing corona generating means and sensor means, directing ionic emission from corona generating means towards one face of said recording member, and detecting on the sensor ionization and ion emission changes effected by electrical conductivity differences between said printed ink deposits and non-printed background areas, and converting the thus detected ionization and ion emission changes into electrical signal corresponding to the information.
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Citations
12 Claims
- 1. A method of information recording and recognition comprising the steps of printing on one surface of a recording member information in the form of ink deposits where such ink deposits contain a substance capable of conferring to such ink deposits electrical conductivity measurable different from that of the non-printed background areas of said recording member, passing said recording member through an information recognition zone, positioning corona generating means adjacent said information recognition zone and directing the ionic emission from said corona generating means towards one face of said recording member, positioning sensor means in said information recognition zone to detect ionization and ion emission changes effected by electrical conductivity differences between said printed ink deposits and non-printed background areas on said recording member and converting the thus detected ionization and ion emission changes into an electrical signal corresponding to said information.
Specification