Flanged tray with gusset corners
US4304352A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1980 |
| Grant date | Dec 8, 1981 |
| Priority date | — |
| Expiry date | Mar 28, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S229/903
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A tray having side wals and a bottom wall is provided with leakproof gusset corners including overlapping gusset panels connected by a center fold line. Side fiold lines connect the respective gusset panels to the side walls with sealing portions of the gusset panels extending the full depth of the side walls for full depth leakproofness of the tray. A cut-out in the inner gusset panel allows bonding of the outer gusset panel against the side wall strengthening the corner of the tray and assuring the sealing action. The cut-out in the inner gusset panel is particularly shaped to form the sealing portion and to allow maximum bonding of the outer gusset panel. A peripheral flange is formed of flange sections having alternate extensions with abutting edges to provide an equal width flange around each corner and the full periphery of the tray. During folding, the flange extension cooperates with a rounded corner of the sealing portion of the inner gusset panel to assure smooth and efficient folding action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.