Improved Apparatus for Drying Coffee, Cocoa, Tea Leaves, or other like Produce or Matters.
Year: 1893

page_text: Date of Application, 21st July, 1893
Complete Specification Left, 6th Apr., 1894-Accepted, 12th May, 1894
Improved Apparatus for Drying Coffee, Cocoa, Tea Leaves, or
other like Produce or Matters.
I AUGUSTINUS AMBROSIUS VAN DELDEN of Birchgrave Heerde, The Hague
in the Kingdom of Holland Planter of Coffee do hereby declare the nature of my
invention to be as follows:
The object of my invention is to provide an apparatus in which coffee, cocoa, tea
leaves, or other like produce, or matters, can be dried in a very efficient and
rapid manner.
An apparatus constructed according to this invention consists of a cylinder
divided longitudinally into chambers, preferably into four such chambers, so that
as the cylinder is rotated, the substance in the respective chambers is balanced by
that in the chambers opposite thereto. A hot air duct extends longitudinally
through the cylinder and is perforated so that the hot air passes therefrom into
each of the chambers, to dry the materials therein, the said air, and moisture which
it has taken up, passing out through perforations in the cylinder, which perforations
are preferably in doors, or lids, covering openings symmetrically arranged through-
out the length of the cylinder. The cylinder is mounted in suitable bearings and
rotary motion is imparted to it by any suitable motor.
The hot air may be
admitted through a hollow trunnion constituting one of the bearings.
As the cylinder rotates the substance in each of the longitudinal chambers is
constantly displaced so that each berry, grain or part thereof, is very thoroughly
presented from all sides to the action of the hot air.
Dated this 21st do of Tale 1902
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improved Apparatus for Drying Coffee, Cocoa, Tea Leaves, or
other like Produce or Matters.
I, AUGUSTINUS AMBROSIUS VAN DELDEN of Birchgrave Heerde The Hague
in the Kingdom of Holland Planter of Coffee 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 :-
The object of my invention is to provide an apparatus in which coffee, cocoa,
tea leaves or other like produce or matters can be dried in a very efficient & rapid
manner.
An apparatus constructed according to this invention consists of a cylinder
divided longitudinally into chambers; preferably into four such chambers, so that,
as the cylinder is rotated, the substance in the respective chambers is balanced by
that in the chambers opposite thereto. A hot air duct extends longitudinally
through the cylinder and is perforated so that the hot air passes therefrom into
each of the chambers, to dry the materials therein, the said air and moisture which
it has taken up, passing out through perforations in the cylinder, which perforations
are preferably in doors, or lids, covering openings symmetrically arranged through-
out the length of the cylinder. The cylinder is mounted in suitable bearings and
P1

page_text: rotary motion is imparted to it by any suitable motor.
The hot air may be
admitted through a hollow trunnion constituting one of the bearings.
As the cylinder rotates the substance in each of the longitudinal chambers is
constantly displaced so that each berry, grain, or part thereof is very thoroughly
presented from all sides to the action of the hot air.
I will describe with reference to the accompanying drawing an apparatus con-
structed according to my invention.
Figure 1 is a side elevation, Figure 2 is a plan and Figure 3 is a transverse
section on the line 1, 2 of Figure 1. A is a cylinder divided into longitudinal
chambers a a a a. B is a longitudinal duct for hot air and perforated so that the
hot air passes therefrom into each of the chambers the said air together with any
moisture which it has taken up from the materials under treatment passing out
through perforations in the doors C (which cover openings in the cylinder) if the
doors alone be perforated or through the perforations in both the doors and
cylinder if both the doors and cylinder be perforated as shewn in the drawing.
The trunnions at the ends of the cylinder are mounted in bearings d and e that at e
being hollow for the attachment of the connection to the place from which the
hot air is taken. The cylinder is rotated from any suitable motor. f is a band
pulley for the reception of a driving strap for this purpose and gh are the
transmitting gear wheels for imparting a comparatively slow motion to the
cylinder. The chambers a may be provided with shelves or lifters as at i.
The perforations in the longitudinal duct B are preferably more numerous at the
inlet end e than at the other end as by that means a more equal distribution of the
air from the duct is effected.
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. An apparatus for drying coffee, cocoa, tea leaves, or other like produce or
matters consisting of a cylinder provided with means for rotating it and divided
into longitudinal chambers with a longitudinal hot air duct and passages for the
hot air from the said duct to the said chambers and for the air and moisture from
the said cylinder all substantially as hereinbefore described.
2. An apparatus for drying coffee, cocoa, tea leaves, or other like produce or
matters the said apparatus being constructed and arranged as herein before described
and shewn in the accompanying drawings.
Dated this 6th day of April 1894.