Apparatus for Roasting Coffee.
Year: 1892

page_text: Date of Application, 28th Nov., 1892-Accepted, 4th Mar.., 1893
COMPLETE SPECIFICATION,
Apparatus for Roasting Coffee.
I, ANTON QUADFLIG, Engineer, in Dentz near Cologne, Freiheitstrasse No. 30,
in the County of Rhineland, Germany, 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:-
An evil up to now much felt in coffee-roasting works and especially by those
living in the neighbourhood is the amount of smoke necessarily developed in the
roasting, pouring in, turning and cooling of the coffee, as well as the very strong
and therefore disagreable smell of the roasted coffee. The authorities therefore
lay great weight on the avoidance of these drawbacks, and most coffee roasting
works have been obliged to apply a ventilating apparatus to the sieve in which the
cooling of the beans takes place after the roasting, in order to suck away the smoke
and smell that has been generated.
Although these appliances are generally coupled with great expense, their effect
is nevertheless incomplete and smoke and smell is developed as heretofore in the
opening and emptying of the roaster, in the pouring in of the coffee into the sieve
etc. etc.
By means of the present invention any generation of smoke or smell towards the
exterior is prevented in the most perfect manner conceivable, without heightening
the cost of the apparatus to any considerable degree.
The appliance is as follows:
The roasting-drum b which turns in the stationary supports a a is surrounded by
a casing c of tin, fastened to the supports. At one side of the casing, d, is a slide-
valve e, to the opening of which a longitudinal slide of the roasting drum-
cylinder can be drawn sideways. The casing c has lengthways on the cylinder two
slits, which can be closed by two valves fastened by means of hinges. Of these
two slits the upper one 9 serves to pour in the coffee and the lower one / to
empty it, when the longitudinal slit f, which opens in the roast-drum-cylinder,
in the first case must be under the casing-slit g and in the second case above the
casing-slit h.
to escape.
I beg still to observe, that the rim of the emptying-slit h in the casing is formed
towards the bottom like a collar in order to act as guide to the roasting-stove i and
the cooling-pan and to serve as a ledge in the extreme positions and at the same
time to effect a better closing of the slits against any smoke that would be likely
The casing e takes the form of a funnel shape cap at the top, which is
connected with the chimney by one or more stove-pipes. Instead of the cap several
stove-pipes may be fixed directly on the top of the casing and lead into the chimney.
Thus the gases coming from other fires, as well as the gases and smells, issuing from
the coffee in the interior of the casing round about the roasting-drum are led off
into the chimney.
When the roasting-drum is filled with beans about to be roasted, the roasting-
stove i, which has the shape of a box and which moves on rails under the above
mentioned drum-apparatus lengthways between the supports, is drawn backwards
and forwards under the drum so as to take the position marked in Figs. 1 & 4 and
the roasting-drum is given a rotatory-motion, until the coffee has got the right colour.
This is determined by sample taken from the drum by means of a verifyer on one
side of the hollow drum-axle.
The roasting-stove is then pushed away from under the drum until it occupies
the position shown in Figs. 2 & 5, whereupon it is closed on the top by the cover k.
An open longitudinal slit, lying between the front upper rim of the stove and the
back lower rim of the lower opening of the casing, allows the gases and smoke

page_text: which still develop in the stove to escape upwards through the casing and the cap
into the chimney.
When the fire has thus been removed from below the roasted coffee, a cooling-
pan 1, which also runs on rollers and rails, is pushed under the casing e as shown in
Figs. 2 & 5. This cooling-pan has a spout-opening in a slanting upward direction,
which fits below the lower opening of the casing e, so that after the roasting-drum
slit is opened, the hot beans slide into the cooling-pan, where they are cooled on
the one hand by the rotation of the agitator 'm, lying lengthways in the inside, and
on the other hand by a ventilator n which is at the back of the pan and con-
tinually blows fresh air through. All smells and gases that are now set free, pass
through the casing and the cap into the chimney, whereby the draught is increased
by the fresh air supplied by the ventilator as well as by the gases and smoke
passing from the roasting stove into the chimney.
This appliance may of course be so chosen that the transference of the stove and
cooling-pan under the roasting-cylinder can be made from a lateral direction.
If several roasting-drums are at hand the roasting-stove as well as the cooling-
"pan may be successively moved under each of them, either by using a part of the
rails, on which these objects run under the roasting-drum, as a platform and
placing it at right angles to the rails, or by attaching 3 disc-wheels to the stove
and pan, 2 at the back and one turning on a forked thill in the front, so that the
roasting-room can be traversed in every direction up to each roasting drum.
Here in the middle, under the drums are short sections of an shaped rail
on which the front middle wheel of the stove or pan moves so that the parts
are placed right under the drum and exactly fit under the lower casing-opening or
under the collar-rim.
"
It may further be mentioned, that in the apparatus first used by the inventor
and which is here described for using the roasting-drum by hand; whereby the
crank and the fly-wheel are fixed to a long axle far away from the axle and the
fire, an improvement is to be noted in comparison to the appliances hitherto in use,
as the workman hardly suffers from the heat.
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 :
.
Coffee-roasting apparatus or works, without smoke or smell, thereby distinguished
that in one or more fixed coffee roasting drums, which are surrounded by a casing
of metal, having a receiving and emptying opening that can be closed, and being
at the top connected with the chimney by means of tin-caps or stove-pipes, the
roasting-stove as well as a cooling-pan, supplied with agitator and ventilator, are
movable on rails, so that all smoke and gases and fumes generated either by the
fire or by the coffee in the apparatuses, are driven round about the roasting-
drums through the casing into the chimney and that in no operation connected
with the coffee-roasting is the smoke or smell allowed to reach the work-rooms.
Dated this Twenty-third of November A.D. 1892.
BERNHARD BROCKHUES;
Applicant's Agent.