Method and apparatus for duplicating steel intaglio print elemen

Details Method and apparatus for duplicating steel intaglio print elemen Method and apparatus for duplicating steel intaglio print elemen

1988-12-20

1990-08-07

Pellinen, A. D.

Electric heating

Metal heating

Cutting or disintegrating

219 692, 204 6, 2041895, B23H 700, B23H 906

Patent

active

049470167

ABSTRACT:
The invention relates to duplicating intaglio print elements in steel by using an engraved copper art model as a template for a copper electrode which in turn is utilized in an electro-erosion machining process to produce the steel workpieces. The invention is particularly applicable to making intaglio print elements for printing on bank note paper and more particularly for printing paper money.

REFERENCES:
patent: 3574075 (1971-04-01), Eccles
patent: 3796851 (1974-03-01), Pfaff, Jr.
patent: 4098652 (1978-07-01), Koenig
patent: 4337385 (1982-06-01), Maropis et al.
patent: 4792654 (1988-12-01), Trujillo

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