End closure for stackable frozen food containers
US4363404A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1981 |
| Grant date | Dec 14, 1982 |
| Priority date | — |
| Expiry date | Mar 30, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2543/00555
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An end closure member is disclosed for closing the bottom of an institutional-size composite container for frozen liquid or fluent materials (such as eggs removed from the shell), characterized in that the end closure member includes a center panel portion, an annular rim portion, and a vertical intermediate tubular portion that connects the center panel portion with, and at a lower elevation than, the rim portion, whereby during the subsequent freezing of the product within the container, the freezing progresses upwardly from the central panel portion, thereby relieving stress on the connection between the bottom end member and the composite body wall. The bottom end closure member includes a stacking rib adapted for insertion within a corresponding stacking recess contained within the container upper closure member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.