# US 4,396,636 A · Method for producing frozen-food

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- Number: US 4,396,636 A
- Document ID: US4396636A
- Status: Granted
- Kind: A
- Application number: 06/311,757
- Filed: 1981-10-15
- Granted: 1983-08-02
- Earliest claimed: 1980-10-18
- Assignees: Hisateru Mitsuda
- Inventors: Hisateru Mitsuda; Saburo Ueno; Jinichi Itoh
- Web page: https://patentgrep.com/patent/US4396636A

## CPC

- A23B 4/066: {the materials not being transported through or in the apparatus with or without shaping, e.g. in the form of powder, granules or flakes}
- A23B 2/805: {Materials not being transported through or in the apparatus with or without shaping, e.g. in the form of powders, granules or flakes}
- A23B: PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES

## Abstract

Disclosed is a method for producing a frozen-food which comprises: the step of forming an ice-capsule, in which the food, initially at room temperature, is chilled with a freezing medium of -80.degree. C. to -100.degree. C. so as to form an ice-capsule surrounding the food within 15 minutes; the step of mild chilling, in which the food is chilled in an environment of -25.degree. C. to -35.degree. C. so that the temperature of the center of the food becomes about 0.degree. C.; the step of quick chilling, in which the food is chilled with a freezing medium of -80.degree. C. to -100.degree. C. so that the temperature of the center of the food becomes about -6.degree. C. or lower; and the step of freezing-storage, in which the food is chilled at a relatively mild temperature for a period of time and then stored at a temperature of -18.degree. C. to -20.degree. C. until consumed.

## Claims

### Claim 1

A method for producing a frozen-food which comprises: forming an ice-capsule, in which the food, initially at room temperature, is chilled with a freezing medium of -80.degree. C. to -100.degree. C. so as to form an ice-capsule surrounding the food within 15 minutes; mildly chilling the food in an environment of -25.degree. C. to -35.degree. C. so that the temperature of the center of the food becomes about 0.degree. C.; then quickly chilling the food with a freezing medium of -80.degree. C. to -100.degree. C. so that the temperature of the center of the food becomes about -6.degree. C. or lower; chilling the food at a temperature of -25.degree. C. to -35.degree. C. for a period of time within the range of 40 to 90 minutes; and then storing the food at a temperature of -18.degree. C. to -20.degree. C.

### Claim 2 (depends on 1)

The method for producing a frozen-food as claimed in claim 1, wherein the ice-capsule is formed by blowing a freezing gas medium onto the food sprayed with an aqueous solution.

### Claim 3 (depends on 1)

The method for producing a frozen-food as claimed in claim 1, wherein the ice-capsule is formed by blowing a freezing gas medium into an aqueous solution in which the food is immersed.

### Claim 4 (depends on 1)

The method for producing a frozen-food as claimed in claim 1, wherein the ice-capsule is formed by blowing a freezing gas medium directly onto the food.