Microwave-heatable hot pad

• US 4,931,608 A
• Filed: 12/16/1988
• Issued: 06/05/1990
• Est. Priority Date: 12/16/1988
• Status: Expired due to Fees

• Current Assignee: Ran Free A Partnership Composed of Randolph L Bills Arthur Friedman and Michael D Friedman
• Original Assignee: Ran Free
• Inventors: Bills, Randolph L.
• Primary Examiner(s): Leung, Philip H.
• Application Number:
  US07/285,815
• Time in Patent Office: 536 Days
• Field of Search: 219/10.55 E, 219/10.55 F, 219/10.55 M, 219/10.55 R, 426/243, 426/241, 426/234, 99/DIG. 41, 99/451
• US Class Current: 219/759
• CPC Class Codes: H05B 6/6494 for cooking
• CPC Class Codes: Y10S 99/14 Induction heating

Abstract

A hot pad for absorbing energy in a microwave oven and heating articles in thermally conductive contact with the pad, comprises a flexible and conformable pad defining a plurality of individual flexible and conformable closed pockets. Each of the pockets is formed of a microwave-transmissive heat-resistant material and at least partially filled with microwave-absorbing particulate matter. The microwave-heated hot pad is used by being disposed in thermally conductive contact with an essentially microwave-transmissive article to be heated (e.g., a non-comestible).

Claims

1. A substantially dry hot pad for absorbing energy in a microwave oven and heating an essentially microwave-transmissive non-comestible article in thermally conductive contact with the pad, comprising:

a flexible and conformable substantially dry pad defining a series of individual flexible and conformable closed pockets spaced from each other, each of said pockets being formed of a microwave-transmissive heat-resistive material and at least partially filled with microwave-absorbing particulate matter, said pad being capable of heating an essentially microwave-transmissive non-comestible article in thermally conductive contact therewith in a microwave oven and being flexible and conformable even at room temperature.

2. The hot pad of claim 1 wherein said material is a fabric.

3. The hot pad of claim 1 wherein said microwave-absorbing particulate matter is selected from the group consisting of aluminum oxide, ferrites and garnets.

4. The hot pad of claim 1 wherein said particulate matter occupies only a portion of the total volume in each of said pockets.

5. In combination, the hot pad of claim 1 and an essentially microwave-transmissive non-comestible article wherein said thermally conductive contact is direct physical contact.

6. The hot pad of claim 1 wherein portions of said pad intermediate said pockets are flexible and conformable so that said pockets may be moved relative to one another.

7. In combination, the hot pad of claim 6 and an essentially microwave-transmissive non-comestible article wherein said thermally conductive contact is direct physical contact.

8. The hot pad of claim 1 wherein said material is liquid-permeable.

9. The method of heating an essentially microwave-transmissive non-comestible article in a microwave oven comprising the steps of:

(A) providing a flexible and conformable substantially dry pad defining a series of individual flexible and conformable closed pockets, each of said pockets being formed of a microwave-transmissive heat-resistant material and at least partially filled with microwave-absorbing particulate matter, said pad being capable of heating an essentially microwave-transmissive non-comestible article in thermally conductive contact therewith in a microwave oven and being flexible and conformable even at room temperature;

(B) placing said pad in thermally conductive contact with the article to be heated; and

(C) placing said pad and the article in a microwave oven for heating.

10. The method of claim 9 wherein said pad is used to heat a plurality of articles and is placed above at least one of the articles to be heated and below at least one of the articles to be heated.

11. A method of heating an essentially microwave-transmissive article outside of a microwave oven comprising the steps of:

(A) providing a flexible and conformable substantially dry pad defining a series of individual flexible and conformable closed pockets, each of said pockets being formed of a microwave-transmissive heat-resistant material and at least partially filled with microwave-absorbing particulate matter;

(B) placing the pad in the microwave oven for a period of time sufficient for the matter in the pad to absorb microwave energy and reach an elevated temperature; and

(C) removing the pad from the microwave oven and placing it in thermally conductive contact with the article to be heated.

12. The method of claim 11 wherein in step (C) the pad is conformed into at least partially encapsulating relationship with the article to be heated.

13. The hot pad of claim 11 wherein said essentially microwave-transmissive article is a non-comestible.