Heat generating container for microwave oven

• US 5,280,150 A
• Filed: 03/13/1989
• Issued: 01/18/1994
• Est. Priority Date: 03/14/1988
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Morino, Taisuke, Arai, Nobushige
• Primary Examiner(s): Reynolds, Bruce A.
• Assistant Examiner(s): HOANG, TU BA
• Application Number:
  US07/322,718
• Time in Patent Office: 1,772 Days
• Field of Search: 219/10.55 E, 219/10.55 F, 219/10.55 R, 99/DIG. 14, 99/348, 99/451, 366/69, 366/78, 366/97, 366/142, 366/98, 426/241, 426/243, 426/107, 126/390
• US Class Current: 219/726
• CPC Class Codes: A21B 2/00 Baking apparatus employing high-frequency or infrared heating
• CPC Class Codes: A21B 7/005 in combination with mixing or kneading devices
• CPC Class Codes: H05B 6/6494 for cooking
• CPC Class Codes: Y10S 99/14 Induction heating

Abstract

A heat generating container for use in a microwave oven or the like, which includes a metallic main container, a metallic lid to be detachably applied onto the metallic main container, and microwave absorbing heat generating film layers formed on outer surfaces of the metallic main container and metallic lid.

Claims

1. A bread baking device for a microwave oven, comprising a hopper placed on a bottom plate of a heating chamber of the microwave oven for accommodating therein materials for making bread, a stirring device for kneading the bread materials contained in said hopper, and an outer cover in a cup-shape detachably mounted on the bottom plate of the heating chamber so as to cover said hopper and said stirring device, a ceiling of the outer cover being located over the hopper when the outer cover covers the hopper and stirring device, microwave absorbing heat generating material layers being provided on the outer cover, the microwave absorbing heat generating material layers having a high dielectric loss to generate heat by absorbing microwaves, and a recess being provided in a portion of the ceiling of the outer cover, the microwave absorbing heat generating material layers provided on the ceiling of the outer cover only being in the recess.

3. The bread baking device as claimed in claim 1, wherein the microwave absorbing heat generating material layers in the recess in the ceiling of the outer cover are embedded within the outer cover, a top coat being provided on an outside of the cover to enclose the microwave absorbing heat generating material.

4. The bread baking device as claimed in claim 3, wherein the top coat is a close adhering non-adhesive and high temperature resistant organic resin selected from the group comprising fluorine, silicon, polyethersulfone and polyphenylene sulfide resin.

5. The bread baking device as claimed in claim 1, wherein the outer cover further comprises a second microwave absorbing heat generating material layer positioned within a side wall of the outer cover, the second layer encircling the hopper when the outer cover is positioned over the hopper, the second layer having a length which is less than a length of the side wall of the outer cover whereby the second layer extends over only a portion of the side wall of the outer cover.

6. The bread baking device as claimed in claim 1, further comprising a movable lid positioned on the hopper, the lid having an outer edge which engages a side wall of the hopper and is slidable therealong as bread in the hopper swells and engages the lid.

7. The bread baking device as claimed in claim 6, wherein the lid has openings defined therein.

8. The bread baking device as claimed in claim 6, wherein the microwave absorbing heat generating material layers in the recess at the ceiling of the outer cover are positioned over the lid and a portion of the ceiling of the outer cover without the recess failing to be over the lid.

2. A microwave absorbing heat generating member, comprising a base member made of a metallic plate having a high heat conductivity and formed with a plurality of through-holes, and a ceramic layer containing a microwave absorbing heat generating material with a high dielectric loss to generate heat by absorbing microwaves, the ceramic layer covering said base member to be integrally formed thereby microwave absorbing heat generating member is without openings.

9. The microwave absorbing heat generating member as claimed in claim 2, wherein the ceramic layer is a first ceramic layer and the member further comprises a second ceramic layer, the second ceramic layer being formed over the base member and being covered by the first ceramic layer.

10. The microwave absorbing heat generating member as claimed in claim 9, wherein the second ceramic layer covers the entire surface of the base member.

11. The microwave absorbing heat generating member as claimed in claim 10, wherein the second ceramic layer is selected from the group comprising alumina, titania, and zirconia.

12. The microwave absorbing heat generating member as claimed in claim 11, wherein the base member is made of one of copper and aluminum and the first ceramic layer is made of silicon nitride containing silicon carbide.

13. The microwave absorbing heat generating member as claimed in claim 2, wherein the base member is made of one of copper and aluminum and the first ceramic layer is made of silicon nitride containing silicon carbide.

14. The microwave absorbing heat generating member as claimed in claim 2, wherein the through-holes are generally square and formed on the member is a lattice-like pattern and wherein the microwave absorbing heat generating member is generally flat.