Printed matter – Having revealable concealed information – fraud preventer or... – Utilizing chemical
Patent
1990-03-08
1991-07-23
Bell, Paul A.
Printed matter
Having revealable concealed information, fraud preventer or...
Utilizing chemical
283 58, 162140, 4283215, 503207, B42D 1500
Patent
active
050337734
ABSTRACT:
A document system having improved image security for preventing or reducing the likelihood of successful alteration of information printed on a document includes a detectable substance is released from ruptured microcapsules onto the document in image areas. The substance that penetrates through the document to form a confirming image on the reverse surface. Another detectable substance of lesser penetrating ability simultaneously may be released onto the document in the image areas. Spreading of the first substance outside the boundaries of the image area created by the second substance may produce a halo effect around the image area. Documents as treated by the methods are disclosed, as well as articles comprising a document to be treated in contact with a sheet coated with the detectable substance. The first substance is microencapsulated, the second substance may or may not be microencapsulated.
REFERENCES:
patent: 1622329 (1927-03-01), MacCordy
patent: 1727912 (1929-09-01), Snyder
patent: 2285806 (1942-06-01), Close
patent: 3020171 (1962-02-01), Bakan et al.
patent: 3617334 (1971-11-01), Broc et al.
patent: 3677887 (1972-07-01), Rowsam et al.
patent: 3886083 (1975-05-01), Laxer
patent: 3934069 (1976-01-01), Atzrott et al.
patent: 4136229 (1979-01-01), Godet et al.
patent: 4143891 (1979-03-01), Neubauer
patent: 4397483 (1983-08-01), Hiraishi et al.
patent: 4425386 (1984-01-01), Chang
patent: 4520063 (1985-05-01), Simon et al.
patent: 4596996 (1986-06-01), Sandberg et al.
patent: 4636818 (1987-01-01), Jerabek
patent: 4662651 (1987-05-01), Mowry, Jr.
Brunea Robert W.
Raby James M.
Bell Paul A.
Moore Business Forms
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