# US 5,705,215 A · Magnetic method for extending the shelf life of food products

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,705,215 A
- Document ID: US5705215A
- Status: Granted
- Kind: A
- Application number: 08/602,246
- Filed: 1996-02-15
- Granted: 1998-01-06
- Earliest claimed: 1991-11-07
- Inventors: George Riach, Jr.
- Web page: https://patentgrep.com/patent/US5705215A

## CPC

- A23B 2/50: by irradiation without heating
- A23B: PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES

## Abstract

A method and apparatus for extending the shelf life of fresh food products that provides magnetic strips, matting formed from the strips, and pads having magnetic north sides and magnetic south sides, wherein the negative magnetic north sides of the magnetic strips or pads are arranged to impinge on the fresh food products stored in a low-temperature environment.

## Claims

### Claim 1

A method of extending the shelf life of food products, comprising the steps of:
forming a magnetic mat having a magnetic north side and a magnetic south side;
arranging said magnetic mat for mounting on a shelf or in a storage bin with the magnetic north side of said mat being positioned outwardly therefrom, whereby the negative magnetic field of the north side radiates outwardly therefrom;
positioning food products within the negative magnetic field, whereby the negative magnetic field impinges on the food products;
providing a refrigerated environment in which both the magnetic mat and food products are exposed to cold air, wherein said magnetic mat is formed having a plurality of openings therein, whereby cold air from said refrigerated environment is allowed to pass through said openings;
subjecting said magnetic pad to a selected low temperature, whereby the density of the negative magnetic field emanating from the magnetic north side of said magnetic pad is increased within the refrigerated environment;
wherein said magnetic pad comprises:
a plurality of elongated magnetic strips placed side-by-side in parallel spaced relation to each other, whereby elongated open channels are defined;
a first cover sheet fixedly secured to the magnetic north side of said magnetic strips; and
a second cover sheet fixedly secured to the magnetic south side of said magnetic strips, whereby said magnetic strips are interposed between said first and second cover sheets;
said first and second cover sheets being formed having a plurality of apertures positioned over said channels to define air passages.

### Claim 2 (depends on 1)

The method as recited in claim 1, wherein said magnetic pad is formed having a plurality of elongated magnetic webbed strips that are woven together to define said magnetic pad.

### Claim 3 (depends on 1)

The method as recited in claim 1, wherein said openings are defined as a plurality of elongated channels by which cold air is circulated through said channels.

### Claim 4 (depends on 1)

The method as recited in claim 1, including the step of selectively storing food products selected from the group consisting of fruits, vegetables, and meats.