Improvements in Rice-product and
Year: 1888

page_text: Improvements in Rice-product and
I, EMORY VINTON DONELSON, of the city of Baltimore, in the State of Maryland,
United States of America, Manufacturer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention has for its object to obtain from the cereal rice the Oryza sativa of
botanists, a product whose elements or constituents, starch, dextrine and sugar shall
be developed into a soluble state or condition and have a form in which its virtues
may be retained or preserved indefinitely, and which may be handled, shipped or
transported with the same facility as the natural grain.
My invention consists of a process and a product as hereinafter described and set
forth in the claims.
The rice, in its usual marketable condition, is first subjected to a rubbing process,
the object of which is to remove the hull or investing covering of cellular tissue.
This is effected by submitting the grain to a moist heat such as steam sufficient to
loosen the covering of cellular tissue; the grain is then passed through a pair of
ordinary "buhr " stones without subjecting the grain to pressure sufficient to
break it.
The grain is then subjected to the action of moisture and heat, such for instance as
that produced by steam to thoroughly develop the soluble starch, dextrine and sugar
without destroying the identity or form of the grains. The temperature of the heat
and the time during which the grain shall be exposed thereto, must be regulated
with a view to prevent the cooking process from reaching the point where loss of
the soluble parts would ensue. When this step of the process has been completed,
the cooked grains should be whole, but soft and plastic.
Any well known means may be employed to subject the grain, as stated, to the .
action of moisture and heat.
While the grains are hot, and immediately on the completion of the cooking
process they are treated to an application of cold water or a blast of cold air, just
sufficient to harden or toughen the outside of the grain, or, as it were to case-harden
it, and leave the inside in the soft and plastic condition before mentioned.

page_text: This hardening or tonghening of the exterior of the grain at this juncture is very
important, as thereby the liability of loss of any part of the starchy ingredients, while
carrying the hot grain to the mill is avoided.
The grains are then ready to be subjected to the treatment of rolls or mill, and the
product is then dried.
When dried, this rice product of starch, dextrine and sugar free of investing
covering will be wholly soluble and beside being useful as an alimentary substance
will be a ready-prepared article adapted for other usos. It will keep any length of
time and may be readily handled.
My process develops a greater percentage of soluble starch and dextrine, and leaves
the product in a condition whereby it will retain its virtue indefinitely and in such
form as to be readily handled, and permit of being introduced directly into Brewers'
mash tubs without the necessity of manipulation by separate machines commonly
known as converters.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :
1st. The herein described article, the product of rice, consisting of soluble starch,
dextrine and sugar, free of investing covering and cooked and dried as set forth.
2nd. The herein described process for treating and preparing rice consisting of
first removing from rice in its usual marketable condition the covering of cellular tissue,
then subjecting the grain to the action of moisture and heat to thoroughly develop
the soluble starch, dextrine and sugar without destroying the identity of the grains,
then hardening or toughening the outside of the grain by cold applications, passing
them through rolls or mill, and then drying as set forth.
Dated this 20th day of October 1888