Thermoplastic bag with metallized end gusset
US5074675A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1990 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Aug 28, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D31/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The present invention is a bag of thermoplastic film material which includes a top wall and a bottom wall connected by first and second sidewalls and having an open end and a closed end. The closed end includes an end gusset wherein there are two lateral edge heat seals. The lateral edge heat seals are formed by a four-fold gusset. The outer surface of one of the folds can be provided with a metallic surface whereas the outer surface of a mating fold in the gusset possesses a non-metallic surface. As a result of the present invention, a metallized end-fold gusset can be provided with a capability of heat sealing the lateral edges in the metallized area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.