Microwave cooking packages and methods of making thereof

US7541562B2 · 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: Oct 4, 2007
• Grant date: Jun 2, 2009
• Expiry date: Nov 5, 2027

Classification

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

Abstract

A microwave insulating material includes a dimensionally stable support, a patterned adhesive layer overlying at least a portion of the support, a polymer film layer overlying the patterned adhesive layer, and a plurality of expandable cells disposed between the support and the polymer film layer and defined by the patterned adhesive layer, wherein the expandable cells vary in size. A self-sealing microwave package includes a sheet of insulating material including a first surface, and a thermally activatable adhesive applied to at least a portion of the first surface.