Pivot punch
US7779738B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2008 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Jun 24, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9476
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A punch arrangement for punching holes in a moving web of a plastic film has a pivoted yoke mounted on a fixed bracket above the plastic film. An air cylinder or other actuator is mounted on the yoke and has a cutting head mounted on the rod of the cylinder. The cutting head is in registered alignment with an aperture on a support plate below the film. The film engages and swings the cutting head out in the film transport direction until the head rises out of contact with the film. Then a spring urges the yoke, actuator and cutting head back to their home position. A punch cycle can be carried out repeatedly on the film while the film is in constant motion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.