A Japanese maker of food containers says it has developed a technology to recycle plastic foam containers into fuel.

A spokesman for the company, Chuo Kagaku Co, said Friday it hopes to market a device by February, 1991, that will condense plastic foam on site at shops and restaurants.Chuo Kagaku will pick up the condensed plastic and process it into fuel for industrial boilers.

Each device would be priced at about $757,000, he said.

Since its debut at an industrial exhibition in October, many firms had shown interest, he added.

The device uses old vegetable oil to heat and melt plastics made from thermoplastic resin. It can process about 22 cubic feet of plastic an hour, reducing it to about one 50th of its original size, he said.