Shielding method for microwave heating of infant formula to a safe and uniform temperature
First Claim
1. In a shielded container device wherein the container has an elongated section operable for receiving a quantity of liquid, the shield comprising:
- (a) a member having a cross-sectional shape sufficient to receive and retain the member by frictional engagement to the surface of the elongated section of said container, said member having a height less than the length of the elongated section of said container so that a lower portion of the elongated section is unshielded, said member being fabricated at least in part from a material having a high microwave reflectivity; and
(b) a thermochromic ink-based temperature-sensitive display disposed on said member and responsive to the temperature of liquid in the container. A shielding method for achieving highly uniform temperatures in liquids during microwave heating by substantially enhancing vertical mixing currents in said liquids, making determinations of final temperature reached in said liquids either by touch or the use of a temperature indicator efficacious, comprising;
a electrically conductive shield having very low impedance at microwave frequencies;
having, a generally cylindrical shape, and dimensions chosen to accommodate a variety of microwaveable containers. said shield;
to be concentric with a microwaveable container, containing a liquid to be heated by microwave radiation; and
, to be located so as the top edge of said shield is at or above a vertical level corresponding to the level of the liquid in said container; and
, to be of sufficient height as to cover at least 10% of the height of the liquid in said container.
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Accused Products
Abstract
A shielding method for achieving highly uniform temperatures in liquids during microwave heating by substantially enhancing vertical mixing currents in said liquids, making determinations of final temperature reached in said liquids either by touch or the use of a temperature indicator efficacious, comprising: a electrically conductive shield having very low impedance at microwave frequencies; having, a generally cylindrical shape, and dimensions chosen to accommodate a variety of microwaveable containers. said shield: to be concentric with a microwaveable container, containing a liquid to be heated by microwave radiation; and, to be located so as the top edge of said shield is at or above a vertical level corresponding to the level of the liquid in said container; and, to be of sufficient height as to cover at least 10% of the height of the liquid in said container. In a preferred embodiment, the shield has a height “h”, covering between 10% and 90% of the of the liquid contained in the container to be heated; and, a circumference/length “L” covering at least 90% of the circumference of the container to be heated.
19 Citations
13 Claims
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1. In a shielded container device wherein the container has an elongated section operable for receiving a quantity of liquid, the shield comprising:
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(a) a member having a cross-sectional shape sufficient to receive and retain the member by frictional engagement to the surface of the elongated section of said container, said member having a height less than the length of the elongated section of said container so that a lower portion of the elongated section is unshielded, said member being fabricated at least in part from a material having a high microwave reflectivity; and
(b) a thermochromic ink-based temperature-sensitive display disposed on said member and responsive to the temperature of liquid in the container. A shielding method for achieving highly uniform temperatures in liquids during microwave heating by substantially enhancing vertical mixing currents in said liquids, making determinations of final temperature reached in said liquids either by touch or the use of a temperature indicator efficacious, comprising;
a electrically conductive shield having very low impedance at microwave frequencies;
having, a generally cylindrical shape, and dimensions chosen to accommodate a variety of microwaveable containers. said shield;
to be concentric with a microwaveable container, containing a liquid to be heated by microwave radiation; and
, to be located so as the top edge of said shield is at or above a vertical level corresponding to the level of the liquid in said container; and
, to be of sufficient height as to cover at least 10% of the height of the liquid in said container. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification