Pellet drying process

Details Pellet drying process Pellet drying process

2011-04-26

2011-04-26

Becker, Drew E (Department: 1782)

Food or edible material: processes, compositions, and products

Processes

Preparation of product which is dry in final form

C426S496000, C426S516000, C426S520000, C426S808000

Reexamination Certificate

active

07931928

ABSTRACT:
A method for making an expandable half-product or pellet suitable for cooking by microwave oven (or other method such as frying) that results in a non-uniform, random design, while having a distinct pattern or style. The half product design is achieved by inducing stress cracks in the half product. The stress cracks are created by a controlled drying process whereby extruded half-products are first case hardened to create an outer skin that requires an internal build-up of pressure to penetrate. After creation of the outer skin, by drying in an oven or in ambient air, the half-product is heated to permit the vapor pressure of the moisture inside the half-product to break through the outer skin and escape. Such escape points induce stress cracks in random places in the half-product. The general pattern of the stress cracks can be varied by manipulation of the time-temperature profile of the case hardening and stress cracking steps.

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