Method of forming fine bore
US4290857A · kind A · utility
4Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1980 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | May 6, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D1/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of forming a fine bore having the steps of effecting electro-forming on a core wire to form an electro-cast rod, slicing the electro-cast rod by forming chips each having the core wire and removing the core wire to thereby form in each chip a fine bore of a diameter coinciding with the diameter of the core wire and having a high circularity and cylindricalness. Since the fine bore is constituted by an electro-formed layer, the bore exhibits high wear resistance and, hence, a high durability when used as nozzle bore of an ink jet plotter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.