Microwavable food container with reinforcing flange and sidewall

US6672473B2 · kind B2 · utility

Assignee

• General Mills, Inc. · US

Inventors

• Paul M. Torniainen · Plymouth, US
• Arne H. Brauner · Minnetonka, US

Key dates

• Filing date: Apr 12, 2001
• Grant date: Jan 6, 2004
• Expiry date: Nov 11, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D2543/00842
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A thermoformed plastic food container for use in microwave heating. The container includes a bottom, a sidewall and a flange. The sidewall extends upwardly from the bottom, terminating at a top end. The flange extends from the sidewall opposite the bottom and includes a rim section and a return section. The rim section extends radially outwardly from the top end of the sidewall, and is curved in transverse cross-section. With this configuration, the rim section defines a radius in transverse cross-section. Further, an outer surface of the rim section is configured to receive a sealing film. Additionally, the rim section defines, in top plan view, at least one side that is longitudinally curved, preferably forming a convex curve relative to a central axis of the container. The return section extends from the rim section opposite the top end. More particularly, the return section extends generally downwardly relative to the rim section. The compound curve configuration of the flange resists deflection in response to a lifting force imparted at a single point on the flange. Thus, during use whereby a food item is contained with the container and heated, the container will not overtly …