Relieved serrated dies for rotary punching units
US4621556A · kind A · utility
10Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1984 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | May 8, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9437
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A serrated rotary die having a minimum die cutback angle .theta., wherein ##EQU1## where CL DIST is the centerline distance between punch and die axes of rotation, ##EQU2## MD is a die internal diameter at the die teeth roots, and HT is the height of the die over midpoint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.