Paper punch
US4656907A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1985 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Aug 30, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9476
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hand-operated punch is formed of molded parts which interfit for easy and rapid assembly and disassembly. This feature is particularly useful if there are paper jams. A handle hooks under a wall of the base. Depressing the handle forces downward a transverse bar recessed to accept the upper ends of the male punch elements, which are spring-biased to travel with the transverse bar. The punch elements reciprocate within a die bar detachably connected to the base. The die bar is formed with a throat for insertion of papers to be punched. The front edge of the base is formed with a transverse groove to accept a male binder element during assembly of a book comprised of the punched paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.