Microwave energy moderator
US4268738A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1977 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Nov 25, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24331
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A microwave moderator for partially attenuating and/or modifying microwave energy to achieve, for instance, more uniform cooking of comestible articles in microwave ovens. Packages, bags, and wraps are disclosed which comprise such microwave moderators and which enable microwave cooking of frozen foods at relatively high microwave oven power levels without requiring precooking, defrosting or oven power level changes. Such a moderator may comprise an array of alternately disposed or spaced areas of microwave reflective material, and complemental-shape, substantially microwave transparent zones. One species of such moderators is exemplified by a wrap which comprises a perforate sheet of microwave reflective material; for instance, aluminum foil. In embodiments comprising such a perforate sheet, the perforate sheet is provided with a plurality of generally uniformly spaced apertures which are sufficiently large with respect to the wavelength of the microwave energy that a substantial portion of such microwave energy directed at said moderator will pass therethrough. The moderator may also include a sheet of microwave transparent, moisture barrier material such as thermoplastic film wh…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.