Apparatus for inhibiting copying of confidential documents

Details Apparatus for inhibiting copying of confidential documents Apparatus for inhibiting copying of confidential documents

1983-06-30

1986-08-05

Hayes, Monroe H.

Photocopying

Miscellaneous

355 40, G03B 2752

Patent

active

046039708

ABSTRACT:
An apparatus for inhibiting the copying of confidential documents is disclosed. Confidential documents are treated with an infrared ray-absorbing agent. The apparatus for inhibiting the copying of confidential documents is comprised of a means to detect the presence of the infrared ray-absorbing agent, and a means to stop a copying operation upon detection of the agent or a means to start a control system to make the documents unreadable. Documents may also be provided with a metal layer. The apparatus is then comprised of a means to detect the presence of the metal layer and a means to stop a copying operation or to start a control system adapted to make copied materials undistinguishable or unreadable upon detection of the metal layer.

REFERENCES:
IBM Technical Disclosure Bulletin, vol. 18, No. 3, Aug. 1975, pp. 912-913.
IBM Technical Disclosure Bulletin, vol. 15, No. 9, Feb. 1973, pp. 2736-2737.
IBM Technical Disclosure Bulletin, vol. 15, No. 7, Dec. 1972, p. 2231.
IBM Technical Disclosure Bulletin, vol. 19, No. 4, Sep. 1976, pp. 1469-1470.
IBM Technical Disclosure Bulletin, vol. 17, No. 11, Apr. 1975, pp. 3434-3436.

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