Food packing body for heat and microwave treatment

[54] FOOD PACKING BODY FOR HEAT AND MICROWAVE TREATMENT

[75] Inventors: Masato Watanabe; Hideyuki

Takahashi; Masao Kinoshita, all of

Tokyo, Japan

[73] Assignee: Mitsubishi Gas Chemical Company, Inc., Tokyo, Japan

[21] Appl. No.: 775,039

[22] Filed: Oct. 11,1991

[30] Foreign Application Priority Data

Oct. 15, 1990 [JP] Japan 2-273319

Oct. 15, 1990 [JP] Japan 2-273320

[51] Int. CI.' H05B 6/80

[52] U.S. CI 219/10.55 E; 219/10.55 F;

219/10.55 M; 99/DIG. 14; 426/107; 426/113; 426/234; 426/243; 428/35.2; 428/35.4;

206/484; 206/204

[58] Field of Search 219/10.55 E, 10.55 F,

219/10.55 M; 426/107, 113, 234, 243, 124; 99/DIG. 14; 428/35, 35.2, 35.4; 264/284; 252/437, 439, 440; 206/204, 484, 484.1, 484.2

[56] References Cited

U.S. PATENT DOCUMENTS

3,770.122 11/1973 Thiele 206/484

4,127,503 11/1978 Yoshikawa et al 252/439

4,192.773 3/1980 Yoshikawa et al 426/124

4,421.235 12/1983 Moriya 428/35

4.485.133 11/1984 Ohtsuka et al 426/124

4,579.223 4/1986 Otsuka et al 206/204

4,657,610 4/1987 Komatsu et al 426/124

4,667,814 5/1987 Wakamatsu et al 206/204

4,814,124 3/1989 Aoyama et al 264/284

4,856,650 8/1989 Inoue 206/204

4,939,332 7/1990 Hahn 219/10.55 E

4,996,068 2/1991 Hatakeyama et al 426/234

FOREIGN PATENT DOCUMENTS

63-082967 4/1988 Japan .

63-087964 4/1988 Japan .

63-087965 4/1988 Japan .

63-087966 4/1988 Japan .

OTHER PUBLICATIONS

Patent Abstract of Japan; No. JP 1045278; "Package of Gas Absorber", Hiroshi Ueno (publication date Feb. 17, 1989).

Primary Examiner—Bruce A. Reynolds

Assistant Examiner—Tu Hoang

Attorney, Agent, or Firm—Leydig, Voit & Mayer

[57] ABSTRACT

Food is contained in a container made from packing materials with an oxygen permeability of 200 ml/m2. 24Hr-atm, an oxygen absorber which has a microwaveproof layer with film thickness of 5-20 /xm on at least one side and also air-permeable packing material on at least one side, whose surface with the air-permeable packing meterial is permeable to air with a water vapor permeability of 10-3,000 g/m2. 24Hr-atm. The oxygen absorber packet is fixed in said container. Under these conditions, it becomes possible to perform both heat treatment and microwave treatment of the food contained therein.

23 Claims, 3 Drawing Sheets