Electric punch
US6782786B2 · kind B2 · utility
2Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2002 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Feb 15, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9464
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An electric punch for automatically punching holes in documents and the like is provided that allows the spacing between the holes to be selectively set at either 70 mm (U.S. standard) or 80 mm (European and Japanese standard) by forming a bend midway of the length of operating arms of respective perforating members so that forward and rearward portions of the operating arms are laterally offset in parallel by a prescribed distance and clamping the operating arms with two supports of different width, thereby enabling the punched hole spacing to be selectively changed by exchanging the left and right perforating members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.