Package for combined steam and microwave heating of food

Patent metadata

Field	Value
Publication number	US-9676539-B2
Application number	US-201414286311-A
Country	US
Kind code	B2
Filing date	May 23, 2014
Priority date	May 24, 2013
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A package for combined steam and microwave heating of food, wherein the package may include microwave energy interactive materials (“MEIMs”) configured for providing rapid, simultaneous microwave and steam cooking in a domestic microwave oven. The MEIMs may be configured for controlling the heating pattern within the package and to control volumetric heating of food in the package. The MEIMs may include one or more of a susceptor, shield, and/or resonating patch antenna. The package may be paper-based, or it may be manufactured of any other suitable material. One or more of the different sections of the package may comprise separate chambers respectively for the steam source and the food to be steamed, so that the steam source and the food to be steamed are separated from one another during manufacturing, storage, and cooking.

First claim

What is claimed is:

1. A package for heating a food product, the package comprising paperboard material and a microwave energy interactive material, the package comprising:
an outer container having an outer sidewall and an outer bottom wall, the outer sidewall and the outer bottom wall cooperating to form an interior space;
a first inner container received in the interior space, the first inner container having an inner sidewall, an inner bottom wall, and a support tube, the support tube being mounted to the inner bottom wall, wherein the inner sidewall comprises a first portion extending downwardly from the inner bottom wall toward the outer bottom wall and a second portion extending upwardly from the inner bottom wall; and
a second inner container received in the interior space, the support tube contacting at least a portion of the second inner container and at least partially supporting the second inner container in the interior space;
wherein the first portion of the inner sidewall, the outer bottom wall, and the inner bottom wall at least partially define a first compartment for receiving a steam source, the second portion of the inner sidewall and the inner bottom wall at least partially define a second compartment for receiving a food product, the inner bottom wall comprises a plurality of first vent openings for allowing steam to pass from the first compartment to the second compartment, and the support tube is in fluid communication with the first compartment and comprises a plurality of second vent openings for allowing steam to pass from the first compartment to the second compartment via the support tube.

2. The package of claim 1 , wherein the support tube extends downwardly from the inner bottom wall in the first compartment and upwardly from the inner bottom wall in the second compartment, the support tube is in fluid communication with the second compartment via the plurality of second vent openings, and the support tube is in fluid communication with the first compartment via a plurality of third vent openings.

3. The package of claim 1 , wherein a side chamber is defined between the outer sidewall and the inner sidewall, and the inner sidewall comprises a plurality of third vent openings extending in the first portion and the second portion of the inner sidewall for allowing steam to pass from the first compartment to the side compartment and from the side compartment to the second compartment.

4. The package of claim 1 , wherein:
the inner sidewall comprises a first inner sidewall, the inner bottom wall comprises a first inner bottom wall, and the support tube comprises a first support tube;
the second inner container comprises a second inner sidewall, a second inner bottom wall, and a second support tube, the second support tube being mounted to the second inner bottom wall, the second inner sidewall comprising a third portion extending downwardly from the second inner bottom wall toward the outer bottom wall;
the first inner container comprises a first flange extending upwardly from the second portion of the first inner sidewall and a second flange extending upwardly from the first support tube; and
the third portion of the second inner sidewall is at least partially received by the first flange, and the second support tube is at least partially received by the second flange.

5. The package of claim 4 , wherein the food product is a first food product, the second inner sidewall comprises a fourth portion extending upwardly from the second inner bottom wall, the fourth portion of the second inner sidewall and the second inner bottom wall at least partially define a third compartment for receiving a second food product, and the second inner bottom wall comprises a plurality of third vent openings for allowing steam to pass from the second compartment to the third compartment.

Assignees

• Graphic Packaging Int Inc

Inventors

• Sloat Jeffrey T
• Resurreccion Jr Fermin P

Classifications

• B65D81/3453 Primary

  Rigid containers, e.g. trays, bottles, boxes, cups · CPC title

• A23L5/15

  using wave energy, irradiation, electrical means or magnetic fields, e.g. oven cooking or roasting using radiant dry heat · CPC title

• B65D2581/3497

  attached to the side walls · CPC title

• Y10T29/49826

  Assembling or joining · CPC title

• B65D2581/3441

  3-D geometry or shape factors, e.g. depth-wise · CPC title