Stackable load bearing tray
US5372257A · kind A · utility
66Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1994 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Apr 20, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D21/046
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The disclosure herein describes a stackable tray which is formed of a body of rigid plastic material with a bottom wall integrally formed with opposite side walls and front and rear walls; each side wall is provided with an upper edge flange which is engageable in a recessed area defined in the lower edge of a superposed similarly constructed tray. The location of the recessed area with respect to the upper edge flange is such as to force outwardly the side walls during stacking engagement thus causing internal stresses in the bottom wall which counteract the sagging which occurs when loads are supported on the bottom wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.