AN IMPROVED PROCESS OF REMOVING GREASE IN THE MANU- PACTURE OF TIN PLATES OR TERNE PLATES, AND IMPROVED APPARATUS IN CONNECTION THEREWITH
Year: 1873

page_text: LETTERS PATENT to William Edward Gedge, of No. 11, Wellington
Street, Strand, in the County of Middlesex, Patent Agent, for the
Invention of "AN IMPROVED PROCESS OF REMOVING GREASE IN THE MANU-
PACTURE OF TIN PLATES OR TERNE PLATES, AND IMPROVED APPARATUS IN
CONNECTION THEREWITH."-A communication from abroad by Jules
Trottier of No 64 Fauboure St. Martin. Paris, France.
PROVISIONAL SPECIFICATION left by the said William Edward Gedge
at the Office of the Commissioners of Patents, with his Petition, on
the 8th April 1873.
I, WILLIAM EDWARD GEDGE, of No. 11, Wellington Street, Strand,
in the County of Middlesex, Patent Agent, do hereby declare the nature
of the said Invention for "AN IMPROVED PROCESS OF REMOVING GREASE
IN THE MANUFACTURE OF TIN PLATES OR TERNE PLATES, AND IMPROVED APPARATUS
IN CONNECTION THEREWITH," a communication to me from abroad by
Jules Trottier, of No. 64, Faubourg St. Martin, Paris, France, to be as
follows:

page_text: layer of grease from which they must be freed before they can be
delivered to commerce. This operation of removing the grease is now
done by passing the plates through flour and wiping them with wool; it
is evident that this method of operating necessitates a somewhat con-
siderable consumption of flour, and has the further defect of resulting in
the entire loss of the grease coating the plates.
The object of this Invention is to recover the grease while lessening
the cost of manufacture, and this object is attained by the aid of the
apparatus shown on the accompanying Sheet of Drawing, which
apparatus is so arranged as to profit by the dissolution of the grease in a
liquid, which liquid may be at pleasure sulphuret of carbon or of hydro-
carbons such as schists, petroleum, oils of tar, benzine, mineral essences,
or oils, and generally any liquid dissolvent of grease.
The method of operating is substantially as follows:-On the with-
drawal of the plates from the last tinning bath they are placed in racks
or baskets of the shape illustrated Fig. 1 of the Drawing; these racks
have handles at a, a, and four small wheels e, e, to permit their being
easily manoeuvered. The racks or baskets being filled the plates are
carried to the reservoirs A³, A2, A³, A', which are filled with dissolvent
liquids.
It will be understood that the plates being plunged into the first bath
are freed from a part of the grease with which they are coated, for in
passing them successively into the following reservoirs which are purer
than the first inasmuch that the plates arrive in them less charged with
grease, they are finally completely freed therefrom. It is thus calculated
that when the first bath is charged with 50 per cent. of grease the
fourth will be charged with but 8 per cent., at which per centage the
grease will be so little perceptible as to be of no account. It will also
be seen that by this method of operating the first bath will become
charged with a much greater quantity of grease than the succeeding
baths, and will eventually become saturated therewith to such a degree
as no longer to produce any effect upon the plates. This first bath will
then no longer be used, and the second will become the first until it
becomes in its turn saturated, the third then becomes the first, and so
on; by reference to Fig. 2 of the Drawing it will be seen that the
arrangement given to the several reservoirs permits the establishment of
the continuity required to permit each of them to become alternately

page_text: first and last. As the liquid becomes saturated it will pass into a
distilling apparatus, and there will thus be recovered on one side the
grease and on the other the dissolvent liquid.
With regard to the racks or baskets furnished with plates which have
passed through the number of baths sufficient for freeing them from
grease it is still necessary that they should be dried, and this is done by
passing them into large conduits of sheet iron E', E, E³, E', having at
their lower part two rails upon which run the wheels of the racks or
baskets. When one of these conduits is full the two ends are closed and
a current of steam passed through which carries off all the dissolvent
remaining on the surface of the plates. This steam being itself condensed
in passing through the worm D it is evident that nearly the whole of
the dissolvent employed is recovered, and that in perfectly good condition
for succeeding operations.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Edward Gedge in the Great Seal Patent
Office on the 7th October 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
EDWARD GEDGE, of No. 11, Wellington Street, Strand, in the County of
Middlesex, Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighth day of April, in the year
of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said William Edward Gedge,
Her special licence that I, the said William Edward Gedge, my
executors, administrators, and assigns, or such others as I, the said
William Edward Gedge, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and
at all times thereafter during the term therein expressed, should and
lawfully might make, use, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "AN IMPROVED PROCESS OF REMOVING GREASE IN THE MANU-
FACTURE OF TIN PLATES OR TERNE PLATES, AND IMPROVED APPARATUS IN CONNECTION

page_text: "
THEREWITH," a communication to me from abroad by Jules Trottier,
of No. 64, Faubourg St. Martin, Paris, France, upon the condition
(amongst others) that I, the said William Edward Gedge, my executors
or administrators, by an instrument in writing under my, or their, or
one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was
to be performed, and cause the same to be filed in the Great Seal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Edward Gedge, do hereby
declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in
and by the following statement :-
It is well-known that in the manufacture of tin or terne plates, the
plates as they issue from the last tinning bath are covered with a layer
of grease from which they must be freed before they can be delivered to
commerce. This operation of removing the grease is now done by
passing the plates through flour and wiping them with wool; it is
evident that this method of operating necessitates a somewhat considerable
consumption of flour, and has the further defect of resulting in the
entire loss of the grease coating the plates.
The object of this Invention is to recover the grease while lessening
the cost of actual manufacture, and this object it attained by the aid of
the apparatus shown on the accompanying Sheet of Drawing which
apparatus is so arranged as to profit by the dissolution of the grease in
a liquid, which liquid may be at pleasure sulphuret of carbon or hydro-
carbons, such as schists, petroleum, oils of tar, benzine, mineral essences,
or oils, and generally any liquid dissolvent of grease.
The method of operating is substantially as follows:-On the with-
drawal of the plates from the last tinning bath they are placed in racks
or baskets of the shape illustrated, Fig. 1 of the Drawing; these racks
have handles at a, a, and four small wheels e, e, to permit their being
easily manoeuvered. The racks or baskets being filled the plates are
carried to the reservoirs A¹, A³, A³, A', which are filled with dissolvent
liquids.
It will be understood that the plates being firstly plunged into No. 1

page_text: passing them successively into the succeeding reservoirs, which are purer
than the first, inasmuch that the plates arrive in them less charged with
grease, they are finally completely freed therefrom. It is thus calculated
that when the first bath is charged with 50 per cent. of grease the
fourth will be charged with but 8 per cent., at which per centage the
grease will be so little perceptible as to be of no account. It will also
be seen that by this method of operating the first bath will become
charged with a much greater quantity of grease than the succeeding
baths, and will eventually become saturated therewith to such a degree
as no longer to produce any effect upon the plates. This first bath will
then no longer be used, and the second will thus become the first until
it becomes in its turn saturated, the third then becomes the first, and
so on; by reference to Fig. 2 of the Drawing it will be seen that the
arrangement given to the several reservoirs permits the establishment
of the continuity required to permit cach of them to become alternately
first and last. As the liquid becomes saturated it will pass into a
distilling apparatus and there will thus be recovered on one side the
grease and on the other the dissolvent liquid.
With regard to the racks or baskets furnished with plates which have
passed through the number of baths sufficient for freeing them from
grease, it is still necessary that they should be dried, and this is done by
passing them into large conduits or stoves of sheet iron E, E', E³, E³,
having at their lower part two rails upon which run the wheels of the
racks or baskets. When one of these conduits is full the two ends are
closed and a current of steam passed through which carries off all the
dissolvent remaining on the surface of the plates. This steam being
itself condensed in passing through the worm D it is evident that nearly
the whole of the dissolvent employed is recovered and that in perfectly
good condition for succeeding operations.
Having now described and ascertained the nature of the Inven-
tion communicated to me as aforesaid, I would have it understood
that I claim as secured to me by the herein-before in part recited Letters
Patent, the scouring of the tin or terne plates by the use of a dissolvent
which permits freeing the plates from the greasy matters which coat
them and the subsequent recovery of the dissolved greasy matter, these
dissolvents being hydrocarburets or their equivalents, and generally any
liquid dissolvent of grease.

page_text: Also the general arrangement of the apparatus used in the application
of this process, substantially as herein-before set forth.
In witness whereof, I, the said William Edward Gedge, have here-
unto set my hand and seal, this Seventh day of October, in the
year
of our Lord One thousand eight hundred and seventy-three.
WE GEDGE (18)