Plastic bag and plastic bag making apparatus
US7497624B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 22, 2003 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Dec 8, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B2160/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A plastic bag including a pair of side gussets 1 is arranged to be free of leakage from one end portion of each of the side gussets.Each of the side gussets has opposite end portions one of which is folded obliquely along a folding line as it is folded into halves so that a triangular flap 13 can be formed by the end portion to be shaped into a triangle having a base formed by the folding line. The triangle has an apex formed by an intersection between one of the opposite end edges and the folded inner edge of each of the side gussets. The panels 2, the side gussets and the triangular flaps are heat sealed respectively along the opposite side edges 3 of panels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.