Packaging bag having tear-open means
US5222813A · kind A · utility
61Cited by
12References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D75/5805
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A packaging bag made of sheet material includes a longitudinal seal situated at the longitudinal bag edge and extending parallel to the bag length. The longitudinal seal bonds together at least two layers of sheet material. The packaging bag further has two transverse seals extending parallel to the bag width and intersecting the longitudinal seal. Each transverse seal bonds together at least two layers of sheet material. A tear-open slit is provided in the longitudinal seal and passes through at least three layers of sheet material of the packaging bag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.