RECORDING MEDIUM HAVING CONCEALED INFORMATION AS INPUT FOR ELECTRONIC COMPUTER

• US 3,829,662 A
• Filed: 10/12/1972
• Issued: 08/13/1974
• Est. Priority Date: 04/17/1969
• Status: Expired due to Term

• Current Assignee: Akira Furahashi
• Original Assignee: Akira Furahashi
• Inventors: Furahashi, Akira
• Primary Examiner(s): Cook, Daryl W.
• Assistant Examiner(s): Kilgore, Robert M.
• Application Number:
  US05/296,965
• Time in Patent Office: 670 Days
• Field of Search: 235/61.11E,61.11D,61.11R,61.6R,61.7B,61.12N,61.12M,61.12R 283/7 340/149A 40/130 88/24 250/219DC
• US Class Current: 235/468
• CPC Class Codes: G06K 19/02 characterised by the selection of materials, e.g. to avoid wear during transport through the machine
• CPC Class Codes: G06K 7/08 by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
• CPC Class Codes: G06K 7/12 using a selected wavelength, e.g. to sense red marks and ignore blue marks

Abstract

Recording medium uses a base on which a signal or data is recorded. On the base a coating is applied, which is of a material not transmitting the visible rays. For rendering the data marked or punched unintelligible to the human eyes, applying over the punched or marked data a substance which cannot transmit therethrough the visible rays.

Claims

1. A recording element bearing concealed information for use as an input for an electronic computer, said element comprising a recording medium with a first material which reflects invisible light, said first material being arranged on said medium in accordance with information, and a coating of a second material which transmits invisible light but which cannot transmit visible light, said coating covering said recording medium to conceal said information.

2. A recording element bearing concealed information for use as an input for electronic computers, said element comprising a recording medium including a first material which reflects invisible light, said medium including said first material being formed with punched holes and in accordance with said information, a coating of a second material which transmits invisible light but cannot transmit visible light, said coating covering said recording medium including said first material thereby concealing the recorded information.

3. A recording element as claimed in claim 2 wherein said information concealing coating is applied to both sides of said recording medium.

4. A recording element bearing concealed information for use as an input for electronic computers, said element comprising a recording medium having invisible light transmission material and invisible light shielding material arranged in different areas corresponding to said information, a coating of a material which transmits invisible light but cannot transmit visible light, said coating being applied to the surface of said recording medium thereby concealing said information and a fluorescent layer provided for exciting photo-luminescence by said invisible light.

5. A method for feeding input information into an electronic computer said method comprising the steps of recording the information upon a recording medium with an invisible light reflecting material, applying to said recording medium a coating of a material which can transmit invisible light but cannot transmit visible light, projecting invisible light upon said recording medium, detecting the reflected invisible light and converting said detected invisible light into electrical signals to be fed as input into the electronic computer.

6. A method for feeding input information into an electronic computer said method comprising the stepS of making a recording element from an invisible light reflecting material by applying to said element a recording medium of a material reflective to invisible light, recording the information in the form of punched holes through said recording medium, applying to said recording medium a coating of a material which transmits invisible light but cannot transmit visible light, projecting invisible light upon said recording medium, detecting the reflected invisible light and converting the detected light into electrical signals.

7. A method for feeding input information into an electronic computer said method comprising the steps of recording the information in a recording medium in combinations of invisible light transmission areas and invisible light shielding areas, applying to said recording medium a coating of a material which transmits invisible light but cannot transmit visible light, thereby concealing said information, providing a fluorescent layer adapted to be excited by invisible light, exciting said fluorescent layer by ultraviolet rays, projecting upon the surface of the recording medium having no fluorescent layer invisible light which transmits through said recording medium and quenches said excited fluorescent layer at the spots corresponding to said invisible light transmission portions of said recording medium, detecting a fluorescent pattern formed by the spots excited and illuminated by the ultraviolet rays but not quenched by said invisible light, and converting said fluorescent pattern into electrical signals to be fed as input into the electronic computer.

8. A device for preparation of a recording medium having concealed information as input for an electronic computer comprising a feed mechanism for feeding a recording card upon which is recorded the information by a combination of invisible light transmission areas and invisible light shielding areas, a mechanism for attaching by heat and pressure upon at least one side of said card an information concealing coating which is carried upon a base, and a mechanism for cooling said concealing coating attached to said card and separating said coating from its base.

9. A recording element bearing concealed information for use as an input for electronic computers, said element comprising a recording medium having a first material which reflects infrared rays and a second infrared ray absorbing material arranged in different areas corresponding to said information, a coating of a material which transmits infrared rays but cannot transmit visible light, said coating being applied to the surface of said recording medium thereby concealing said information, and a fluorescent screen which is pre-excited by ultraviolet rays, said fluorescent screen being disposed in spaced relationship with respect to said recording medium so that reflected infrared rays impinge thereon to form a fluorescent pattern of information by the quenching of the infrared rays.