Security document and method for making same using an alternatin

Details Security document and method for making same using an alternatin Security document and method for making same using an alternatin

1979-10-11

1982-09-28

Bell, Paul A.

Printed matter

Calendar

283 58, B42D 1500

Patent

active

043515479

ABSTRACT:
An improved copy-proof document is disclosed having a cancellation phrase with an alternating dot pattern which enhances both the detail rendition and protection of such documents. The method of making such a document by preprinting the cancellation phrase in a single tone pattern of alternating dot sizes is also disclosed.

REFERENCES:
patent: 3675948 (1972-07-01), Wicker
patent: 4168088 (1979-09-01), Somlyody
patent: 4210346 (1980-07-01), Mowry, Jr.
patent: 4227719 (1980-10-01), McElligott
patent: 4227720 (1980-10-01), Mowry, Jr.
patent: 4265469 (1981-05-01), Mowry, Jr.

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