Film web perforation
US4765120A · kind A · utility
23Cited by
8References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Feb 25, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B11/008
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A device for perforating a film web while wrapping a load which the film web includes a web dispenser for dispensing the film web and an arrangement for providing relative rotation between the load and the web dispenser to wrap the film web on the load. It also includes electrodes positioned proximate to the film web and an arrangement for generating an arc at the electrodes to perforate the film web with the arc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.