Self-clearing punch with removable blade
US4607553A · kind A · utility
15Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1984 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | Jul 30, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9473
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A punch is disclosed having a hollow removable blade for punching an opening in a sheet of cardboard or other similar material. The blade has a beveled cutting edge about an inlet end. The diameter of the blade increases from the inlet end to the outlet end to prevent the slugs from becoming compacted in the blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.