Improvements in Coffee-bean Shelling Machines.
Year: 1890

page_text: Date of Application, 22nd Sept., 1890-Accepted, 25th Oct., 1890
COMPLETE SPECIFICATION.
Improvements in Coffee-bean Shelling Machines.
I, JOHANNES ANDERSSON, of 21 Graskeller, Hamburg, in the Empire of Germany,
Merchant, 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 relates to coffee bean shelling machines and consists in certain
improvements in the construction and arrangenient of the receiving and shelling
rollers thereof. The purpose of the invention is mainly to produce the rollers
cheaper and more durable and to permit them to be used up more completely than has
been the case with the arrangements known heretofore.
Figures 1 and 2 of the accompanying drawings are front elevation and plan
respectively of a snelling-machine constructed according to this invention.
Figure 3 is a longitudinal section thereof and
Figures 4 to 12 are detail views of the improved parts.
The general arrangement of the machine is as follows :.
A is a hopper for receiving the coffee beans to be shelled, B a closing device at the
base of the hopper to regulate the supply of the beans into the horizontal shelling-
cylinder C. The beans enter at m at one end of said cylinder and leave through the
channel m' at the other end, whence they may be carried if necessary through a
further hopper A¹ into a second shelling-cylinder C₁, which is of similar construction
to C. A ventilator V draws off the dust and the husks during the working of the
machine, whilst the shelled beans leave the machine at K. The improvements relate
to the shelling rollers and the cylinders C and C containing them. Each cylinder is
provided along its length with shelling-rollers K and K₁ arranged end to end on the
common shaft w. The roller K, which is located next to the inlet-opening m, is made
of cast iron, the roller K' is constructed of a hard material for instance case hardened
iron or steel. The roller K properly speaking is not intended to remove the husks,
but rather to carry the beans to the shelling-roller K¹.
For this purpose the roller K is provided with coarse grooves e e e at the inlet end
at m, as seen by Figs. 4 and 6, which become narrower towards the other end being
divided up into more numerous grooves as seen in Figs. 4 and 5, where the narrow
grooves are indicated by e¹. The roller K', which may be considered as a continuation
of K, contains grooves of the narrower sort as shown in Figs. 10, or 11 and 12,
corresponding to the rollers K and K₁, the cylinders within which these rollers revolve
are fluted or grooved with different fineness on their interior circumference, as may be
seen by Figs. 7, 8 and 9, where Fig. 7 is an outside view, Fig. 8 the longitudinal
section and Fig. 9 cross sections on lineæ x and y y of the cylinders. The grooves in
part I of the cylinder for roller K may be cast in direct into this cast-iron cylinder,
whilst the cylinder part II for roller K¹ is provided with openings into which are
fitted the steel linings g g which have the grooves on their inner faces, as shown by
Fig. 9, right hand side. The roller K is securely fastened upon the shaft w, whilst the
roller K' is fastened to the shaft w in an interchangeable manner so that the roller
may be withdrawn from the shaft and reversed in order that the using up of the two
ends which are thus brought equally into use may add to the durability of the roller.
This arrangement is of great importance for cheap working, as the rollers are
subjected to the wear and tear and are expensive to make.
Also the steel-linings g g of the cylinder are arranged to be reversed and inter-
changed for the same purpose.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In a coffee-bean shelling machine.
1. The shelling rollers, consisting of two parts K and K¹ for each cylinder of
which K is made of cast-iron and K' of steel or other suitable hard material and of
which K is arranged underneath the inlet m being a receiving roller and provided at
the beginning with coarse grooves narrowing or divided gradually into narrower
grooves.
2. The rollers K and K' constructed substantially as set forth and designed so that
the shelling-roller K' may be reversed on the shaft w for compensating wear for the
purpose described.
3. The combination of the receiving and shelling rollers K and K¹ with a cylinder
therefor which is provided with interchangeable linings g for the hard roller K³ said
linings being made of hard material and grooved on their inner faces.
Dated this 22nd day of September 1890.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents for the Applicant.