Web of plastic bags
US4561107A · kind A · utility
23Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 24, 1982 |
| Grant date | Dec 24, 1985 |
| Priority date | — |
| Expiry date | May 24, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S493/936
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A web of interconnected plastic bags produced by providing a tubular foil of plastic material with gusset folds with bottom fold part seals at both sides of the tubular foil. Each fold part seal connects a gusset fold part with an opposite part of the outer foil layers. Immediately after having moved the tubular foil over a predetermined distance the tubular foil is provided with a first transverse bottom seal by heatsealing opposite first fold part seals and outer foil layers to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.