Seal bars having asymmetric surface features
US5076040A · kind A · utility
28Cited by
17References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1991 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Mar 5, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/83221
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A seal for a pouch packaging machine as, for instance, a form, fill and seal packaging machine, includes first and second seal bars each having a sealing surface thereon. The seal bars are located on the machine in positions locating the sealing surfaces on the respective seal bars opposed to one another. In cross section the respective sealing surfaces on the seal bars each include a plurality of concave and convex surface features. The convex surface features have a radius of curvature that is less than the radius of curvature of the concave surface features thus rendering the sealing surfaces asymmetrical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.