Electric heating – Microwave heating – With heat exchange
Patent
1995-08-04
1997-07-08
Leung, Philip H.
Electric heating
Microwave heating
With heat exchange
219736, 219745, 12626301, 12626307, 12626309, 607101, H05B 680, F24J 100
Patent
active
056457499
ABSTRACT:
A heat pack including a flexible water-tight plastic bag, saturated sodium acetate solution contained in the plastic bag, and an activator disposed in contact with the saturated sodium acetate solution and operated to activate the saturated sodium acetate solution, causing the saturated sodium acetate solution to crystallize, wherein the activator is covered within a plastic shell. According to another embodiment of the invention, the activator is a metal plate having a frosted outside wall.
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