Capacitive discharge drive for electric stapler
US4558391A · kind A · utility
21Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1983 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Feb 14, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25C5/0228
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An electrically operated stapling apparatus is disclosed having a circuit utilizing a capacitor for driving the solenoid actuator for the apparatus. The circuit includes a fullwave rectifier for charging the capacitor with closely spaced dc pulses and includes circuitry for producing a plurality of charging levels for the capacitor depending upon the number of sheet material to be stapled. A reference circuit is also provided to insure the voltage level of charging is such that the operation of the apparatus is immune to line source voltage fluctuations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.