Improvement in Drums for Roasting Coffee, Coffee-substitutes, Cocoa, Grain and other similar Products.
Year: 1899

page_text: Date of Application, 23rd Oct., 1899
Complete Specification Left. 21st July, 1900-Accepted, 1st Sept., 1900
Improvement in Drums for Roasting Coffee, Coffee-substitutes, Cocoa,
Grain and other similar Products.
I, MAX SCHÖNDORFF, of Mülheim-on-the-Ruhr, Luisenthal, in the Empire of
Germany, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a new and useful improvement in drums for roasting
coffee, coffee-substitutes, cocoa, grain and other similar products and its object is
to provide a drum of suitable material whereby tainting and otherwise injuring
the contents thereof is avoided and the value of the product increased.
Heretofore drums of this character have been formed of metal such as tin plate.
These, however, have always been objectionable in view of the fact that the different
kinds of organic substances, such as empyreumatic oils, volatilisable fats, etc.,
which are developed during the operation of roasting, enter into reaction with
the metal with which they come into contact. The vessel is thus attacked, and
the metallic particles which are liberated, even although very minute, are trans-
ferred to the substances being roasted. For instance, iron in the form of oxide
compounds would be transferred to the substances, thus injuring their taste and
lessening their value.
I avoid all of these disadvantages by using roasting drums made entirely of
porcelain, earthenware or enamel or by employing vessels provided interiorly with
a thickness of such materials.
In the accompanying drawing I have shown the preferred form of my invention.
In said drawing:-
Figure 1 represents a longitudinal section of a drum in which only the interior
is provided with a thickness of porcelain, earthenware, or enamel ;
Figure 2 is a drum constructed entirely of ceramic material as shown.
The form shown in Figure 2 has the advantage compared with the form shown
in Figure 1, in that the possibility of any compounds of iron penetrating through
the earthenware or like, and perhaps porous, material forming the interior is
excluded.
The subject matter of this invention consequently provides every security against
injury of the aforesaid substances during the operation of roasting, and the
decrease of their commercial value as dainties, because the material of the vessel
in contact with the contents is entirely indifferent to the products formed by heat-
ing the vegetable matter.
Dated this 23rd day of October 1899.

page_text: Improvement in Drums for Roasting Coffee, Coffee-substitutes, Cocoa,
Grain and other similar Products.
I, MAX SCHÖNDORFF, of Mülheim-on-the-Ruhr, Luisenthal, in the Empire of
Germany, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to a new and useful improvement in drums for roasting
coffee, coffee substitutes, cocoa, grain and other similar products and its object is
to provide a drum of suitable material whereby tainting and otherwise injuring
the contents thereof is avoided and the value of the product increased.
Heretofore drums of this character have been formed of metal such as tin plate.
These, however, have always been objectionable in view of the fact that the different
kinds of organic substances such as empyreumatic oils, volatilisable fats, etc.,
which are developed during the operation of roasting, enter into reaction with
the metal with which they come into contact. The vessel is thus attacked, and
the metallic particles which are liberated, even although very minute, are trans-
ferred to the substances being roasted. For instance, iron in the form of oxide
compounds would be transferred to the substances, thus injuring their taste and
lessening their value.
I avoid all of these disadvantages by using roasting drums made entirely of
porcelain, earthenware or enamel or by employing vessels provided interiorly with
a thickness of such materials.
In the drawing accompanying my Provisional Specification I have shown the
preferred form of my invention. In said drawing Figure 1 represents a longi-
tudinal section of a drum in which only the interior is provided with a thickness
of porcelain, earthenware or enamel and Figure 2 a drum constructed entirely
of ceramic material as shown.
The form shown in Figure 2 has the advantage compared with the form shown
in Figure 1, in that the possibility of any compounds of iron penetrating through
the earthenware or the like (and perhaps porous) material forming the interior, is
excluded.
The subject matter of this invention consequently provides every security against
injury of the aforesaid substances during the operation of roasting, and the
decrease of their commercial value as dainties, because the material of the vessel
in contact with the contents is entirely indifferent to the products formed by heat-
ing the vegetable matter.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
I claim is: --
First. A drum of the character described having an interior thickness of porce-
lain, earthenware, enamel or other ceramic material, substantially as described.
Second. A drum of the character described constructed of porcelain, earthenware,
enamel or other ceramic material.
Dated this 20th day of July 1900.
Dated this 20th day of July 1900.
M. SCHÖNDORFF,
Per W. H. Beck,
115, Cannon Street, London, E.C., Agent.