Method of sealing a zipper with concave bridges or bases using convex sealing bars
US7410453B2 · kind B2 · utility
2Cited by
19References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2006 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Feb 7, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S493/927
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention includes a method and apparatus wherein webless zipper is provided with concave seal bridges. These concave seal bridges are complementary in shape to convex sealing bars. This captures or positions the seal bridges of the zipper profiles resulting in improved alignment of the profiles and improved performance of the manufacturing apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.