Container with steam port for use in microwave ovens
US4560850A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1984 |
| Grant date | Dec 24, 1985 |
| Priority date | — |
| Expiry date | Dec 3, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S220/27
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A container for arc-free use and minimal electromagnetic reflection in a microwave oven is disclosed. The container includes a tray having smooth side and bottom walls and edges, with the side wall in elevation having a curved configuration provided with a substantial radius. The configuration of the tray in plan view is either round (circular) or has rounded corners formed with substantial radii. The surfaces of the tray are coated on both sides with a layer of heat-resistant plastic material having a thickness on the order of 0.25 to 2.5 mils. A heat-resistant plastic microwave transparent lid is provided for the tray. In a preferred embodiment, the tray's bottom defines a steam port that, during heating, allows steam to escape therethrough and travel along the tray bottom to further heat the tray bottom and thus the tray's contents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.