Heat seal apparatus, bag machine, and bag edge forming apparatus with resilient tubular anvil
US7262389B2 · kind B2 · utility
6Cited by
37References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2004 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Jun 15, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1054
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus is provided for forming bag edges in a layered plastic film. The apparatus includes a heated seal bar and a seal bar anvil. The seal bar anvil has a resilient tube configured to deform as the seal bar is driven into the tube to seal and sever a bag edge therebetween. According to one construction, the resilient tube is pressurized pneumatically from the inside so as to impart a specific, desired resilience to the tube as the tube and seal bar co-act on either side of the layered plastic film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.