Method and apparatus for detecting a seal on a plastic bag
US5861078A · kind A · utility
14Cited by
52References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1996 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Nov 14, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B2160/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for registration of a seal to a perforation on a plastic bag include a drum for forming a seal on a continuous plastic film and a downstream perforator/cutting station for forming a perforation on the film with respect to the location of the seal. The perforation is properly registered to the seal by sensing the seal location directly, with a seal sensor located near the perforator/cutting station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.