Electric heating – Metal heating – Of cylinders
Patent
1986-12-18
1989-12-19
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1055F, 426101, 426234, 426243, 126390, 99DIG14, H05B 680
Patent
active
048884596
ABSTRACT:
A container for holding a body of material such as foodstuff to be heated in a microwave oven, including a dielectric lid and/or other dielectric wall structure with at least two ontiguous dielectric wall portions of respectively different electrical thickness for cooperatively modifying the microwave electric field patterns that would obtain in the body during such heating if the lid and/or other dielectric wall structure were of uniform electrical thickness or were absent. At least one of the portions, preferably the portion of higher electrical thickness, may be so constituted as to undergo a change in dielectric constant during the microwave heating, thereby to alter the heating distribution in the body as heating proceeds.
REFERENCES:
patent: 3835281 (1974-09-01), Mannix
patent: 3934106 (1976-01-01), MacMaster et al.
patent: 3985992 (1976-10-01), Goltsos
patent: 4081646 (1978-03-01), Goltsos
patent: 4230924 (1980-10-01), Brastad et al.
patent: 4266108 (1981-05-01), Anderson et al.
patent: 4337116 (1982-06-01), Foster et al.
patent: 4369346 (1983-01-01), Hart et al.
Alcan International Limited
Leung Philip H.
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