Tin or other Metal by the Use of Grease.
Year: 1887

page_text: Date of Application, 31st Mar., 1887
Complete Left, 31st Jan., 1888
Complete Accepted, 2nd Mar., 1888
Tin or other Metal by the Use of Grease.
We, ADOLPH GUTENSON, of Bow, in the County of Middlesex, Chemist, and
EDWARD Cox, of Datchet, in the County of Bucks, Gentleman, do hereby declare the
nature of our said invention to be as follows:-
In the method ordinarily practised in Tin plate works for the manufacture of
tinplate, the plates to he tinned are first cleaned by pickling in acid and are then coated
with a layer of grease (such for instance, as tallow or palm oil) which is subsequently
replaced by a coating of tin by immersing the greased plates into a bath of molten
tin. The plates thus tinned are then brushed on both sides, dipped into another bath
of molten tin, and are then passed through the finishing pot.
This process of tinning is used for coating other articles as well as plates, but
in describing our present invention we will refer to tinplate only, it being
understood that all other articles as well as plates to be coated with tin or other
metal, are included in such reference.
not
The cost of manufacturing tin plates has within the last few years increased,
whilst their value has decreased, and accordingly various methods have been proposed
for reducing the cost of production, especially in relation to the appliances and
apparatus used. For instance pots have been used in which the plates to be tinned
pass in on one side and come out tinned upon the other side. By this ineans considerable
saving of time and labour, and of material, is effected, but as grease when used does
operate sufficiently quickly, it cannot be successfully used with such pots, and a
chemical flux has in such case to be substituted for it. As however the mode of
tinning by the use of grease produces the most perfect results, and as there is a pre-
judice against the substitution of a chemical flux on account of the liability of plates
tinned by the use of some of these chemical fluxes to become rusty underneath the surface
of the tin or other coating metal, it has become important that the rapid method of
tinning described above should be made applicable to the use of grease instead of a
chemical flux, and our present invention has for its object improvements by which
such use of grease can be effected.
Grease may be taken to be an organic flux in comparing it with other chemical

page_text: fluxes composed chiefly of inorganic materials, and the latter being (as already
explained) liable to deteriorate the plates upon which they are used, it is necessary in
order that the substitution of grease may be made in every way efficient, that its
action be so modified and quickened that it can be used with the improved pots
already described.
For this purpose we take the plates to be tinned, cleaned by pickling with acid but
still wet, and we immerse them in an organic solution obtained by pouring boiling
water upon ordinary flour or other like organic substance containing starch or
glucose, or which is capable of being readily converted into starch, or organic
material, such as gelatine, capable when in solution in water of combining with greasy
matters, and to this solution we add a small proportion of glycerine, or we immerse
the plates in glycerine dilated with water only, but on account of their cheapness, we
prefer the organic materials first mentioned. We then pass the plates through melted
grease, which may be in sufficient quantity and thickness upon the surface of the
molten tin in the pot or bath so that the plates pass through the boiling grease
directly into the molten tin. Or they may be first dipped into melted grease in a
separate pot. The former method is the more simple and quick, and allows the easy
and convenient use of the grease in connection with the improved pots already above
referred to, and a great saving of labour and material is in this way effected.
The preliminary treatment of the plates in the method and with the materials
described renders them capable of at once receiving the grease upon their surface,
and the presence of the latter ensures the immediate and uniform adherence of
the tin.
The proportions of the organic substances used may be varied more or less as
may be found advisable.
After they have left the pot or bath the plates are finished in the usual way.

page_text: Improvements in the Process of Coating Iron or other Metals with
Tin or other Metal by the Use of Grease.
We, ADOLPH GUTENSOHN, of Bow, in the County of Middlesex, Chemist, and
EDWARD Cox, of Datchet in the County of Bucks, Gentleman, 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 (that
is to say) :-
In the method ordinarily practised in tin plate works for the manufacture of tin
plate, the plates to be tinned are first cleaned by pickling in acid and are then coated
with a layer of grease (such, for instance, as tallow or palm oil) which is subsequently
replaced by a coating of tin by immersing the greased plates into a bath of molten
tin. The plates thus tinned are then brushed on both sides, dipped into another
bath of molten tin, and are then passed through the finishing pot.
This process of tinning is used for coating other articles as well as plates, but in
describing our present invention we will refer to tinplates only, it being understood
that all other articles as well as plates to be coated with tin or other metal, are
included in such reference.
The cost of manufacturing tin plates has within the last few years increased,
whilst their value has decreased, and accordingly various methods have been proposed
for reducing the cost of production, especially in relation to the appliances and
apparatus used. For instance pots have been used in which the plates to be tinned
pass on one side and come out tinned upon the other side. By this means
considerable saving of time and labour, and of materials, is effected, but as grease
when used does not operate sufficiently quickly, it cannot be successfully used with
such pots, and a chemical flux has in such case to be substituted for it.
As however the mode of tinning by the use of grease produces the most perfect
results, and as there is a prejudice against the substitution of a chemical flux on
account of the liability of plates tinned by the use of some of these chemical fluxes
to become rusty underneath the surface of the tin or other coating metal, it has
become important that the rapid method of tinning described above should be made
applicable to the use of grease instead of a chemical flux, and our present invention
has for its object improvements by which such use of grease can be effected.
Grease may be taken to be an organic flux in comparing it with other chemical
fluxes composed chiefly of inorganic materials, and the latter being (as already
explained) liable to deteriorate the plates upon which they are used, it is necessary in
order that the substitution of grease may be made in every way efficient, that its
action should be so modified and quickened that it can be used with the improved
pots already described.
For this purpose we take the plates to be tinned, cleaned by pickling with acid but
still wet, and we immerse them in an organic solution obtained by pouring boiling

page_text: water upon ordinary flour or other like organic substance containing starch or
glucose, or which is capable of being readily converted into starch; or organic
material, such as gelatine, capable when in solution in water of combining with greasy
matters, and to this solution we add a small proportion of glycerine, or we immerse
the plates in glycerine diluted with water only, but on account of their cheapness, we
prefer the organic materials first mentioned.
We then pass the plates through melted grease, which may be in sufficient quantity
and thickness upon the surface of the molten tin in the pot or bath so that the plates
pass through the boiling grease directly into the molten tin. Or they may be first
dipped into melted grease in a separate pot. The former method is the more simple
and quick, and allows the easy and convenient use of the grease in connection with
the improved pots already above referred to, and a great saving of labour and material
is in this way effected.
The preliminary treatment of the plates in the method and with the materials
described renders them capable of at once receiving the grease upon their surface, and
the presence of the latter ensures the immediate and uniform adherence of the tin.
The proportion of the organic substances used may be varied more or less as may
be found advisable.
After they have left the pot or bath the plates are finished in the usual way.
Having now particularly described and ascertained the nature of our said Inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is
The use of a solution of organic substance containing starch or glucose, or which is
capable of being readily converted into starch; or organic material such as gelatine
capable when in solution in water of combining with greasy matters; or glycerine,
for the preliminary treatment of the metal which is to be coated with tin or other
metal, substantially as and for the purpose described.
Dated this 31st day of January 1888.