Device for punching hole in cards
US4596359A · kind A · utility
8Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 29, 1985 |
| Grant date | Jun 24, 1986 |
| Priority date | — |
| Expiry date | May 29, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB26F1/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A punching device for punching coded key cards and the like comprising a plurality of punches, each of which is selectively movable in respective guide. Balls of ferromagnetic material are positionable in a first punching position and a second passive position. Solenoids with movable cores are arranged to selectively move the balls between the first and second positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.