Thermally-activated receiving medium for use in a facsimile tran

Details Thermally-activated receiving medium for use in a facsimile tran Thermally-activated receiving medium for use in a facsimile tran

1989-04-21

1991-03-19

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

380 54, 283 17, 355201, H04N 144, G09C 500

Patent

active

050017497

ABSTRACT:
A printing medium for the printing of images thereon to form a document by the printer of a standard facsimile machine in a manner which renders the document unreadable to a casual observer. There is a strip of a flexible printing medium receivable by the facsimile machine for passage therethrough past the printer thereof. The printing medium has a surface for receiving an image from the printer. Additionally, there is a strip of an obscuring medium removably attached to the printing medium along an edge thereof in a manner which will allow the obscuring medium to pass through the facsimile machine in combination with the printing medium. The obscuring medium has an obscuring portion covering a printing surface of the printing medium upon which the printer prints images for rendering printing on the printing medium unreadable to a casual observer. Four embodiments are disclosed for use in both thermal and plain paper facsimile machines.

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patent: 4821321 (1989-04-01), Bramley

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