IMPROVEMENTS IN APPARATUS FOR DRYING COFFEE
Year: 1882

page_text: LETTERS PATENT to Friedrich Hermann Felix Engel Civil Engineer and
Patent Agent in the city of Hamburg Germany for an Invention of
"IMPROVEMENTS IN APPARATUS FOR DRYING COFFEE & communication to
him by Federico Klée trading under the firm of F. Klée of Hamburg in the
German Empire.
PROVISIONAL SPECIFICATION left by the said Friedrich Hermann Felix
"
Engel at the Office of the Commissioners of Patents on the 19th July 1882.
FRIEDRICH HERMANN FELIX ENGEL Civil Engineer and Patent Agent in the
city of Hamburg Germany "IMPROVEMENTS IN APPARATUS FOR DRYING COFFEE
a communication to me by Federico Klée trading under the firm of F. Klée of
Hamburg in the German Empire
"
This Invention relates to certain improvements in apparatus for drying coffee
and is constructed for drying the fruit of the coffee-tree after the red shell has been
removed from the berries.
Hitherto this drying has been executed by exposing the fruit to the rays of the
sun in which case the drying process required about six days time more or less
according to circumstances. By means of this improved apparatus the process of
drying is completed in a far shorter time and can be regulated by the operator.
The apparatus consist of two concentric drums preferably made of strong wire
gauze or perforated sheet iron or other sheet metal. These drums are strengthened
by metal hoops and are connected to each other by bolts To keep the space
between the drums as smooth as possible and to allow the fruit to pass.freely
through the apparatus the hoops are attached to the outer walls enclosing this
space.
This double-drum is by means of discs fastened to an axle or shaft supported in
brackets which shaft or axle can by hand or by means of any other convenient
motor be put in slow rotation. The shaft is made hollow and serves at same time
for leading steam hot water or hot air into the heating tubes arranged along the
wall of the inner drum.
The gases water or air entering and passing through the tubes find exit through
pipes communicating with the hinder end of the shaft divided from the other part
by a wall or partition in said shaft.

page_text: The hollow space between the two drums by means of a number of division
walls of perforated sheet metal or wire gauze divided into the same number of
compartments which can be filled or fed with the fruits or berries through flaps
after which the apparatus is put in rotation and steam, water or air is admitted
into the heating tubes.
The ends of the drum are closed on one side by a disc that is a fixture and on
the other side by a sheet iron cover fastened to a collar sliding on the projecting
end of the shaft. This cover can be pushed over a ring of the first drum by
pushing the collar inward and can more or less close the front opening of the free
space between the drums at the bottom end.
When the cover is drawn out the dried fruits or berries enter the cover and
escape through openings formed to the rim or side of the cover and thence pass into
a mantle of the apparatus from where they drop out through a flap. The operation
of the apparatus is as follows; after the space between the two drums has been
filled with berries the apparatus is put in rotation and the heating gases or water
are admitted
Within six or eight hours about, the berries have been dried after which the
cover is by means of a collar pulled back from the end of the opening and the
berries placed nearest this end begin to drop out of the machine. By feeding fresh
berries into the apparatus through a hopper attached to the fast wall or disc a
continual action of the apparatus can be ensured the berries drying on their way
through the machine
The time during which the berries have to remain in the drying apparatus can
-be regulated by the cover that can more or less be drawn out by which greater or
smaller parts of the openings become freed from the ring.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Friedrich Hermann Felix Engel in the Great Seal Patent Office
on the 19th January 1883.
"
FRIEDRICH HERMANN FELIX ENGEL Civil Engineer and Patent Agent in the
city of Hamburg Germany IMPROVEMENTS IN APPARATUS FOR DRYING COFFEE
a communication to him by Federico Klée trading under the firm of F Klée of
Hamburg in the German Empire
This invention relates to certain improvements in apparatus for drying coffee
and is constructed for drying the fruit of coffee tree after the red shell has been
removed from the berries. Hitherto this drying has been executed by exposing
the fruit to the rays of the sun in which case the drying process required about six
days time more or less according to circumstances. By means of this improved
apparatus the process of drying is completed in a far shorter time and can be
regulated by the operator.
In the accompanying drawings Fig 1 represents side elevation of the apparatus
Fig 2 an end view Fig 3 a cross-section at line a, b Fig 1 and Fig 4 a longi-
tudinal section of same. Figs 5 and 6 are sectional views showing details which
will be described in the following Specification.
The apparatus consists of two concentric drums A and B preferably made of
strong wire gauze or perforated sheet iron or other sheet metal. These drums are
strengthened by metal hoops a, a and are connected to each other by bolts d d. To
keep the space between the drums as smooth as possible and to allow the fruit to
pass freely through the apparatus the hoops are attached to the outer walls
enclosing this space as will be understood with reference to the drawings.
This double-drum A, B is by means of discs e, e, e fastened to an axle or shaft C
supported in brackets which shaft or axle can by hand or by means of any other
convenient motor be put in slow rotation. The shaft C is made hollow and serves
at same time for leading steam hot water or hot air into the heating tubes H
arranged along the wall of the inner drum B as will be understood with reference
to Figs 3, 4 and 5 of the drawings; the gases water or air entering and passing
through the tubes H in the direction of the arrows (find exit through pipes r
communicating with the hinder end i of the shaft C divided from the other part by
a wall or partition m in said shaft.
The hollow space between the two drums A and B is by means of a number of
division walls (see Fig 5) of perforated sheet metal or wire gauze divided into
the same number of compartments which can be filled or fed with the fruits or
berries through flaps E after which the apparatus is put in rotation and steam
water or air is admitted into the heating tubes. The ends of the drum are closed
on one side by a disc P that is a fixture and on the other side by a sheet iron
cover R fastened to a collar q sliding on the projecting end of the shaft C. This
cover R can be pushed over a ring a of the first drum A by pushing the collar q
inward and can more or less close the front opening of the free space between
the drums at the bottom end. Figs 1 and 4 show cover R, and when the cover
is drawn out the dried fruits or berries enter the cover and escape through
openings & formed to the rim or side of the cover and thence pass into a mantle M
of the apparatus from where they drop out through a flap v.
The operation of the apparatus is as follows; After the space between the two
drums has been filled with berries the apparatus put in rotation and the heating
gases or water are admitted.
Within six or eight hours about the berries have been dried after which cover R
is by means of collar q pulled back from the end of the opening and the berries

page_text: placed nearest this end begin to drop out of the machine. By feeding fresh berries
into the apparatus through a hopper T attached to the fast wall or disc P a
continual action of the apparatus can be ensured the berries drying on their way
through the machine. The time during which the berries have to remain in the
drying apparatus can be regulated by cover R that can more or less be drawn out
by which greater or smaller parts of the openings s become freed from ring a.
Having now described the nature and particulars of the said Invention what I
claim and desire to secure by Letters Patent is
The combination in a coffee drying apparatus of a double drum A, B, with a
heating arrangement and regulating cover R for closing or opening the end of the
free space between the two drums for the purpose of drying coffee constructed and
operating as and for the purpose herein described and as illustrated by the
accompanying sheet of drawings.
In witness whereof I the said Friedrich Hermann Felix Engel have hereunto
set my hand and seal this thirteenth day of January in the year of our
Lord one thousand eight hundred and eighty-three.