Method and apparatus for the preparation of a crisp food product

摘要

A crisp food product is prepared in a first phase from thin food pieces of raw fruit, vegetable or gelatinizable proteins, by blanching them (if necessary) and drying them. A second phase takes place in a vacuum chamber, where the dried thin food pieces are exposed to heat to expand them, are quickly removed from the heat source and are cooled, before being removed from the vacuum.

主权项

1. A method of preparation of a crisp food product, said method including the steps of:
blanching slices of food in a confined space between two sheets that are generally impervious to moisture, while exposing the slices of food to heat and substantially retaining the moisture of the slices of food within said space between the sheets, and while supporting the slices of food on a perforated sheet, said moisture impervious sheets and said perforated sheet each being endless and said slices of food being conveyed continuously on the perforated sheet while being blanched; transferring the slices of food from the perforated sheet by applying an air stream to the slices of food, said air stream being applied from a side of the perforated sheet that is opposite from the slices of food and said air stream passing through the perforated sheet, to the slices of food; dehydrating the slices of food in air; exposing the slices of food to heat, under vacuum; removing the slices of food from sources of heat, while still under vacuum; and cooling the slices of food, while still under vacuum.