Improvements in Apparatus for Smelting Tallow.
Year: 1891

page_text: Date of Application, 4th Aug., 1891
Complete Specification Left, 3rd May, 1892-Accepted, 4th June, 1892
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Smelting Tallow.
I, HERMANN PFÜTZNER of 46 Bornaische Strasse, Connewitz-Leipzig, in the
Empire of Germany, Manufacturer do hereby declare the nature of this invention
to be as follows:-
The object of this invention is an apparatus for the fine-smelting of tallow, which
apparatus is heated by means of hot water or corresponding thermal substance and
is provided with a special contrivance for moving the melting fat pieces and for
the passage of the hot water or the like.
The improved apparatus essentially consists of a stationary drum provided with a
hollow mantle and having centrally lodged therein a hollow shaft which is actuated
by a thinner solid shaft, passing through the same, by means of pulley and suitable
gear provided on one side of the drum. The latter has an opening for introducing the
flat pieces, which opening or feeding box contains a mechanically acting feeding
device, for instance a worm, and a sieve. The pieces are pressed by said device
through the sieve and arrive, without being touched by hand, in the interior
of the drum heated by hot water or the like. The heating substance enters the
mantle of the drum through a pipe at the top and leaves it through a pipe at the
bottom thereof.
Heating material is moreover supplied from a laterally arranged pipe to the said
hollow shaft, which is provided with a number of hollow fingers or stirrers, each of
which is divided into two chambers by a diaphragm reaching nearly to the end, so
that the heating substance flows through the hollow shaft and through each
stirrer. The stirrers move slowly through the little flat-pieces contained in the
drum, thereby assisting in melting the same. The molten tallow sinks to the
bottom and passes through a sieve into a tallow collector provided with cocks,
through which the molten tallow can be discharged according to requirement into
the clearing reservoirs.
The tallow collector, in order to keep the molten tallow at the proper degree
of liquidity, is surrounded with a hollow mantle for the passage of heating
substance.
The drum is provided with man-holes for cleaning purposes and with cocks
serving to discharge the tallow in case the sieve leading to the collector should be
obstructed.
The hollow shaft may also be dispensed with, the stirrers being secured on the
solid shaft and connected with each other by tubes laid spirally around the shaft,
while the shaft has on each side a bore communicating respectively with the first
and last stirrer and serving for the admission and discharge of the heating
substance.
Dated this 4th day of August 1891.
HUELSER & CO.,
Agents for Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Smelting Tallow.
I, HERMANN PFÜTZNER, of 46 Bornaischestrasse, Connewitz-Leipzig, in the
Kingdom of Saxony, 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 subject of this invention is an apparatus for the fine-smelting of tallow,
which apparatus is heated by meaus of hot water or other suitable heating substance
and is provided with a special contrivance for stirring the pieces of melting fat and
for producing a circulation of the heating fluid.
In the accompanying drawings:
Fig. 1 is a horizontal section of an apparatus embodying my invention.
Fig. 2 is a cross section along line R R of Fig. 1.
Fig. 3 is an end view of the apparatus.
Fig. 4 shows the tallow collector.
Figs. 5-9 show the stirring mechanism on a larger scale.
Figs. 10-12 represent a modification of the stirring mechanism.
The improved apparatus chiefly comprises a stationary drum T provided with a
jacket A and having centrally lodged therein a hollow shaft a, which is set in
motion by a solid shaft b passing through the same, by means of a pulley B and
tooth gear C. The drum has an opening D for introducing pieces of fat, which
opening or feeding box contains a mechanically acting feeding device, for instance
a worm e and a sieve d. The pieces are pressed by said worm through the sieve d,
and arrive, without being touched by hand, in the interior of the drum heated by
hot water or the like. The heating substance enters the mantle of the drum
through a pipe e at the top and leaves it through a pipe fat the bottom thereof.
Heating fluid is moreover supplied from a pipe g to the said hollow shaft which
is provided with a number of hollow fingers or stirrers G, each of which is divided
into two chambers by a diaphragm reaching nearly to the end, so that the
heating fluid flows through the hollow shaft and through each stirrer. The
stirrers move slowly through the small pieces of fat contained in the drum,
thereby assisting in melting the same. The molten tallow sinks to the bottom and
passes through a sieve into a tallow collector J provided with cocks ¹¹, through
which the molten tallow can be discharged according to requirements into the
clearing vats.
α,
The tallow collector, in order to keep the molten tallow at the proper degree of
liquidity, is surrounded with a mantel O, for the circulation of heating fluid..
The drum is provided with man holes m, m, for cleaning purposes, and with
cocks serving to discharge the tallow, in case the sieve leading to the collector
should be obstructed.
The hollow shaft a may be dispensed with, as shown by Figs. 10 to 12, the
stirrers G being secured on the solid shaft b by means of saddle pieces p, and
connected with each other by tubes s laid spirally around the shaft, while
this shaft has at each end a borer communicating respectively with the first
and last stirrer and serving for the admission and discharge of the heating
fluid.
The apparatus works continuously and gives a fine and uniform product, because
the use of hot water prevents superheating, while the peculiar arrangement of
stationary and moveable heating surfaces, ensure great uniformity of action.
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 :-
1. Apparatus for smelting tallow, comprising in its construction a stationary

page_text: smelting drum T, provided with a feed mechanism (c d), a jacketed collector J,
and a heating jacket A; and a moveable hollow axle a, armed with hollow
stirrers G and heated with water or other suitable fluid, substantially as described.
2. Apparatus for smelting fat of the type specified above, in which, however, the
hollow stirrers G are mounted on a solid shaft b (instead of having a shaft a), and
in which the required circulation of heating fluid through the said stirrers is
obtained by perforating the ends of the axle b and connecting consecutive stirrers
through pipes s, substantially as described.
Dated thie 2rd dow of Mov 1909
HUELSER & Co.,
Agents for Applicant.