Apparatus and method for making Z-folded zippered film
US5047002A · kind A · utility
21Cited by
11References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1990 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Sep 27, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B2160/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for producing rolls of thermoplastic film stock wherein zipper elements are interlocked for structural support while the web is open, resembling a "Z" in cross-section, and ready for use on container and packaging machines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.