Method and apparatus for duplicating steel intaglio print elements using electro-erosion machining
US4947016A · kind A · utility
10Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1988 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Dec 20, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H9/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.