An Improved Decorticating or Hulling Machine.
Year: 1891

page_text: Date of Application, 2nd Feb., 1891
Complete Specification Left, 16th Mar., 1891-Accepted, 25th Apr., 1891
PROVISIONAL SPECIFICATION.
An Improved Decorticating or Hulling Machine.
I, EUGEN REVERDY, of No. 14, Am Markt, Bremen, in the Empire of
Germany, Factory Manager, do hereby declare the nature of this invention to
be as follows:-
This invention consists in an improved decorticating or hulling machine for
removing the skin, shell, or hull from grain or the skin from coffee beans or other
leguminous or grain fruit.
The improved machine comprises a rotary cup or table with a rim thereto.
adapted to be revolved in a horizontal plane and to be fed with the grain or the
like to be decorticated through a suitable funnel or hopper so that the grain
arrives on the surface of the table or cup and is thrown by the centrifugal force,
imparted to it by the rotation of the table or cup, against the inner surface of a
surrounding hood or mantle which is made of a domed shape and of suitably rough
material so as to loosen or break off the hulls from the grain and clean the latter..
The husks and impurities are drawn off in or by a current of air in any known
manner.
The cup or table may have no action on the grain etc. apart from the throwing
of the same against the domed mantle, or if desired the grain can undergo a
preliminary treatment in the cup in which case the latter is made with an outer or
surrounding rim in the form of an inverted truncated cone of suitable depth, lined
with wire cloth or other rough material suitable for decorticating this rim having
preferably a small inwardly projecting inclined flange at its upper edge. The grain
Hying outward meets and surmounts the said rim of the cup and after passing the
flange thereon is thrown by the centrifugal force acquired against the aforesaid
mantle which completes the decortication commenced on or by the aforesaid rin.
Dated this 2nd day of February 1891.
HERBERT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
An Improved Decorticating or Hulling Machine.
I, EUGEN REVERDY, of No. 14, Am Markt, Bremen, in the Empire of
Germany, Factory Manager, do hereby declare the nature of this invention, and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
This invention consists in an improved decorticating or hulling machine for
removing the skin, shell, or hull from grain or the skin from coffee beans or other
leguminous or grain fruit also partly for polishing the same.
The peculiarity of the arrangement consists in the produce to be treated being
carried to a cup or a horizontal disc which rotates on a vertical axis and which by
means of centrifugal power throws the produce against the inner surface of a mantle
encircling the disc when the dome surface thereof being roughened or constructed
of rough material breaks up the hull and polishes the hulled grain or produce at
the same time. The further separation of the shells or husks or other impurities
from the grain is done by blowers or exhausting devices in the known manner and
is no part of the present invention.
The further treatment may take place on the same machine or on other special
machines to which the mixture is carried.

page_text: The invention is represented in the accompanying drawing in which
Fig. 1 is a vertical section and Fig. 2 an elevation of a hulling machine so far as
the respective parts come into consideration.
Fig. 3 is a vertical section showing a centrifugal cup or vessel of modified shape.
On the vertical shaft m, Figs. 1 and 3, which may be journalled in the machine
frame and rotated by a pulley r, the cup or vessels is securely fixed on the upper
end of said shaft.
Said cup may be flat in the shape of a plate (Fig. 1) or it may have an upwardly
bent edge (Fig. 3) if the substance to be treated is to be subjected to a process
preparatory to the hulling on the plate or to an after treatment subsequent to the
hulling as will be explained hereinafter. Around the edge of the cup is arranged
the mantle D which is provided with a surface roughened on the inside or also with
a special inner wall which operates to split the husks or hulls of the substance
thrown against said wall and polish the grain at the same time.
The produce enters the machine through the funnel T with tube t and falls
upon the receivers and is thrown by the latter against the roughened surface .
The shells and the grain may be separated at once in the machine by drawing off
the lighter shells by a suction device allowing the grain to fall to the bottom.
If the produce to be shelled is to be subjected to a preliminary rubbing process
on the receivers in order to facilitate thereby the subsequent shelling or to polish
the shelled grain the receivers is made like a basket with a flat obliquely rising
wall as shown by Fig. 3. By constructing the wall of the receiver of a wire
netting or of other suitable rough material, for instance of artificial stone, the
grain which is thrown from the centre of the receiver outw: rds over the wall of the
same will strike the wall and rub against it when the hull vill be burst or in any
case loosened.
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
1. A device for hulling and polishing coffee beans, rice, millet and other like
vegetable fruit or grain characterized by a horizontally rotating cup or disc onto
which is carried the produce to be treated and of a ring shaped stationary cover
arranged around the edge of the cup or receiver said cover having an inner
roughened surface on which the produce is thrown by centrifugal power from the
cup or plate for the removal of the hulls or shells.
2. In hulling machines a horizontally rotating cup or disc provided with an
obliquely rising outwardly directed wall which is formed as a grinding surface by
being roughened or by being covered with a suitable rough material for the purpose
of wholly or partially hulling or polishing the produce brought upon said cup or
disc, by its passage of said wall.
1001
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents for the Applicant.