Gusseted pinch bottom laminated plastic valve bag
US3990626A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1972 |
| Grant date | Nov 9, 1976 |
| Priority date | — |
| Expiry date | Oct 4, 1992 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S383/908
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A bag of tubular form comprising at least two plies of molecularly oriented plastic film, laminated together with their directions of orientation angularly disposed to each other and to the longitudinal direction thereof, said bag having at each end thereof one surface overlapping an oppositely disposed surface, a pair of oppositely disposed gussets interposed between said surfaces, said gussets extending at said bag ends into the overlap areas between said oppositely disposed surfaces, at least one bag end including all of said overlapping portions being folded over and adhered to the oppositely disposed surface, the bag in the preferred embodiment being closed at both ends and being provided with a valve sleeve for filling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.