Plastic film punching apparatus
US9511505B2 · kind B2 · utility
4Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2014 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Jan 21, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9423
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A plastic film punching apparatus is improved to prevent a waste 15 from being caught in a cylindrical punch blade 2. The apparatus includes a punch blade 2 comprising a saw-toothed edge which includes mountain portions and valley portions formed alternately with each other. A protrusion 5 is disposed internally of the punch blade 2 to protrude beyond the position of height H1 of the bottoms 7 of valley portions and toward the position of height H2 of the tops 6 of mountain portions. An annular clearance 8 is formed between the punch blade 2 and the protrusion 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.