Copy machine with unauthorized copy prevention

Details Copy machine with unauthorized copy prevention Copy machine with unauthorized copy prevention

1983-03-21

1984-12-04

Gonzales, John F.

Photocopying

Including fiber optics

355133, G03G 1500

Patent

active

044860900

ABSTRACT:
A copy machine having an eddy current proximity detector positioned so relative movement is provided between the detector and a document to be copied. The detector is connected to control logic circuitry for the copy machine so that the copy machine is prevented from producing a copy when the detector detects metal carried by the document. A document cover position indicating device is also connected to the control logic for the copy machine so that closure of the document cover is required for the production of a copy.

REFERENCES:
IBM Technical Disclosure Bulletin: vol. 15, No. 9, Feb. 1973, pp. 2736-2737, "Secure Document Feature for Copy Machines."
IBM Technical Disclosure Bulletin: vol. 15, No. 12, May 1973, p. 3642, "Unauthorized Copy Prevention."
IBM Technical Disclosure Bulletin: vol. 16, No. 6, Nov. 1973, pp. 1951-1952, "Gradiometer Document Detector for Copy Security."
IBM Technical Disclosure Bulletin: vol. 17, No. 11, Apr. 1975, p. 3182, "Copier Document Security," p. 3198, Secure Document Feature for Copy Machine.
IBM Technical Disclosure Bulletin: vol. 18, No. 4, Sep. 1975, p. 1002, "Secure Document Feature for Copy Machine."

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