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Pressure relief covers for frozen food containers

a pressure relief and cover technology, applied in the direction of lids, closures, packaging, etc., can solve the problem that the top container tends to fall off easily

Inactive Publication Date: 2007-01-25
DIAMOND DAVID W
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005] The present invention solves this problem by providing covers with a plurality of depressions in the region where the covers contact the upper edge

Problems solved by technology

However, the problem is objectionable because the stacked containers are not usually strapped down, and consequently the top container tends to fall off readily due to its bulging bottom.
The problem appears to be confined to the top containers in each stack, possibly because the lower containers in each stack are carrying the weight of the higher containers when they are frozen.

Method used

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  • Pressure relief covers for frozen food containers
  • Pressure relief covers for frozen food containers
  • Pressure relief covers for frozen food containers

Examples

Experimental program
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Embodiment Construction

[0017]FIGS. 1-10 illustrate a conventional plastic container 2 and cover 4 designed for the frozen food industry, except that the cover has been modified to constitute a preferred embodiment of the invention. The container and cover are made of a suitable resilient plastic, e.g. polyethylene. The container comprises a bottom wall 6 and a tapered side wall 8. The side wall 8 has an outwardly projecting peripheral locking flange or bead 10 at its upper end, an outwardly projecting peripheral seating flange 12 spaced below locking flange 10, and an outwardly projecting peripheral flange 14 that forms a support for a skirt or secondary side wall 16 that surrounds and is spaced from side wall 8. The upper end surface of locking flange 10 is an extension of and forms part of the upper end surface 11 of the container. Portions 16A of skirt 16 are spaced far enough from side wall 8 to permit a person's fingers to grip its bottom edge with enough purchase to be able to lift and carry the con...

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PUM

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Abstract

Undesired bulging of sealed food containers occurring during blast freezing is overcome by providing covers with pressure-relief passageways or vents in the form of a plurality of depressions in the region where the covers contact the upper edge of the containers to which they are applied. An alternative, but less preferable, embodiment is to form shallow slots in the upper edges of the containers.

Description

[0001] This application claims the benefit of the filing date of U.S. Provisional Application Ser. No. 60 / 701,227, filed Jul. 21, 2005 by David W. Diamond for “Pressure Relief Covers For Frozen Food Containers.”FIELD OF THE INVENTION [0002] This invention relates to the art of blast freezing foods in sealed containers and more particularly to covers for such containers. BACKGROUND OF THE INVENTION [0003] A variety of foods are frozen in plastic containers of one gallon capacity or more for institutional customers, e.g., restaurants, hospital and military commissaries, and other food manufacturers. Examples of such foods are eggs, ice cream, puddings, mashed potatoes, dairy products, and stewed and cooked fruits. The blast freezing process involves putting a food product into plastic containers having a generally flat bottom wall, applying a snap-fit plastic cover to the container, and then placing the covered container into a blast freezer where it is subjected to blast freezing. In...

Claims

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Application Information

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IPC IPC(8): B65D51/16
CPCB65D43/0256B65D51/1661B65D2543/00092B65D2543/00296B65D2543/00518B65D2543/00842B65D2543/00555B65D2543/00629B65D2543/00685B65D2543/0074B65D2543/00805B65D2543/00537
Inventor DIAMOND, DAVID W.
Owner DIAMOND DAVID W