Tray container with reinforced sidewalls
US4308985A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1980 |
| Grant date | Jan 5, 1982 |
| Priority date | — |
| Expiry date | May 12, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S229/94
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A tray-type container for processing and marketing a loaf of bread, or the like, and a method of forming the same is disclosed, which tray is formed from a single blank of paperboard having a coating of a heat sealable and heat resistant film material so as to provide, when fully set-up, a rectangular bottom wall with hingedly connected upstanding sidewalls integrally connected at the corners by pairs of triangular web members folded upon each other and against the outside faces of opposite sidewalls where they are secured in reinforcing relation by narrow top edge flanges folded into underlying relation with and sealed to narrow flanges at the top edge of the sidewalls with the film material being skip-cut at the top edge of the sidewalls so as to reduce buckling in the sidewalls which otherwise results due to the difference in shrinkage of the film and the paperboard material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.