Microwave cooking packages and methods of making thereof

US8828510B2 · kind B2 · utility

Assignee

• Graphic Packaging International, LLC · US

Inventors

• Lorin R. Cole · Batavia, US
• Timothy H. Bohrer · Chicago, US
• Scott W. Middleton · Oshkosh, US
• Richard G. Robison · Appleton, US
• Terrence P. Lafferty · Neenah, US
• Brian R. O'Hagan · Appleton, US
• Patrick H. Wnek · Sherwood, US

Key dates

• Filing date: Apr 1, 2013
• Grant date: Sep 9, 2014
• Expiry date: Apr 1, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/139
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A package with self-forming insulating walls includes a tray for supporting a food item, a flap joined to the tray along a fold line, and an insulating microwave material overlying at least a portion of the tray and at least a portion of the flap. The insulating microwave material may be joined to the flap. The insulating microwave material may include a microwave energy interactive material supported on a first polymer film layer, a moisture-containing layer joined to the microwave energy interactive material, and a second polymer film layer joined to the moisture-containing layer in a predetermined pattern, thereby defining a plurality of expandable cells between the moisture-containing layer and the second polymer film layer.