Punching apparatus
US5214991A · kind A · utility
29Cited by
12References
23Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 15, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Aug 15, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/943
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A punching apparatus used for high speed punching of holes in a workpiece, such as a ceramic green sheet, for use as a printed-circuit board. Upper and lower die blocks, stationary relative to each other, are provided, with punch pins fixed in two dimensions by multiple guides. A fluid passage is provided within the lower die block for providing gaseous lubrication and cleaning of the punch pin while in operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.