Improvements in Coating Metal Plates or Sheets with Tin and other Metals, and Apparatus therefor.
Year: 1893

page_text: Date of Application, 10th Mar., 1893
Complete Specification Left, 14th Apr., 1893-Accepted, 17th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Coating Metal Plates or Sheets with Tin and other
Metals, and Apparatus therefor.
We WYNDHAM PARTRIDGE THOMAS Engineer of Penarth and ROBERT
DAVIES Tin Plate Works Manager of Whitchurch both in the County of
Glamorgan South Wales do hereby declare the nature of this invention to be as
follows:-
The object of our invention is to provide means for coating metal plates or
sheets with tin and other metals with speed and regularity and in one continuous
operation wherein a minimum of labour will be required and in our apparatus the
plates will not be exposed to the air during this operation or until they are finished.
To carry out this object we place the customary two pots the coating pot and
dipping pot in juxtaposition which pots are preferably rather shallow and the
bottoms thereof are preferably curved or rounded off, and these pots are duly filled
with the molten tin or other metal kept at the desired temperatures in any
convenient manner. In the coating pot is fitted a partition which extends down-
wards into the metal as a dip and on the one side thereof is placed the required
quantity of the desired flux which is supported on the surface of the metal and the
plate to be treated is passed through this flux into the metal and pushed along
between suitable curved guides until its leading edge is caught by a pair of rolls
mounted across the other end of the pot in the proper inclined position at or near
the surface of the metal. From these rolls the plate passes out of this pot to a
pair of rolls complementarily mounted in the dipping pot being guided thereto over
the edges of these pots by suitable curved guides and these two pairs of rolls are
preferably so mounted in such brackets that they can easily be lifted out and
removed when required. Over these two pairs of rolls and the edges of the pots
between them is fitted a casing or box the bottom whereof is partly open and the
sides thereof extend downwards into the metal as dips and this casing is duly filled
with palm oil or other desired flux up to a level above that of the curved guides
which likewise is supported on the surface of the metal and thus in passing from
the coating pot to the dipping pot the plate will not be exposed to the air and the
top of this casing is open or closed as preferred. From the rolls in the dipping
pot the plate passes between suitable curved guides under the side of and up into a
grease pot supported on this dipping pot wherein is the desired grease or other
material which likewise is supported on the surface of the metal and in this grease
pot the plate passes up between the usual series of pairs of rolls and guides the
lower pair of rolls being preferably at or near the surface of the metal and of the
When the plate
upper pair of rolls one is preferably divided into two halves.
passes out of the grease pot it can be finished off or further treated in any ordinary
manner.
This apparatus is preferably made broad enough to receive and treat two plates
at the same time side by side. Suitable springs or other appliances are provided
to press the pairs of rolls properly together. It is convenient also to fit a sliding
rod on the side of the casing or box so arranged that when the following edge of
the plate leaves the pair of rolls in the coating pot it may trip or raise this rod and
thus give notice to the attendant that another plate can be pushed in. Slots may
be made in the upper curved guides between the pair of rolls in the coating pot
and the pair of rolls in the dipping pot wherethrough a plate may be inserte.1 when
it is desired to send it through this dipping pot and the grease pot again.
D
1
101
J
L 1000

page_text: COMPLETE SPECIFICATION.
Improvements in Coating Metal Plates or Sheets with Tin and other
Metals, and Apparatus therefor.
We WYNDHAM PARTRIDGE THOMAS Engineer of Penarth and ROBERT
DAVIES Tin Plate Works Manager of Whitchurch both in the County of
Glamorgan South Wales 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 this our invention is to provide means for coating metal plates or
sheets with tin and other metals very conveniently and efficiently with speed and
regularity and in one continuous operation wherein a minimum of labour will be
required to the manifest advantage and economy of the same in the use thereof and
in this our apparatus wherein and whereby the aforesaid operation is performed
and effected the plates or sheets will not be exposed to the air during the same or
that is to say during their passage through the apparatus until they are finished
and emerge thereout whereby again many and various advantages are obtained and
secured and many and various evils are overcome and obviated.
In order the more clearly to explain this our invention and in what manner the
same is to be performed and used we refer to the accompanying drawing wherein
we have shewn a longitudinal section of our apparatus.
The customary two pots namely the coating pot A and the dipping pot B
are placed in juxtaposition and these pots A and B are preferably made rather
shallow and the bottoms thereof are preferably formed of a curved or rounded off.
shape as is shewn in the drawing whereby not only is the great advantage obtained
and secured of there being a smaller body or quantity than is generally the case of
the tin or other metal to be melted to the manifest economy of fuel but also the
additional great advantage is obtained and secured of there being more freedom
and opportunity for the tin or other metal very easily to expand on being so melted
and correlatively to contract on cooling or solidifying and therefore these pots so
made and formed as aforesaid are not so liable to burst as are the pots when made
of the ordinary style and shape to the manifest saving or prevention of waste of
metal and furthermore these pots when so made and formed as aforesaid can be the
more easily cleaned out and the inner surfaces thereof can be the more easily freed
from any possible scale or deposit and these pots A and B are duly filled up to the
proper required level with the molten tin or other metal which can be kept at the
desired temperatures in any convenient manner and through and by any suitable
and usual or other means and appliances.
Near the entering end of the coating pot A and extending across and supported
by the same is fitted a partition (which extends downwards so far into the metal
in the pot A as may be desired to constitute a dip and between this partition C and
the end of the pot A which may if necessary or desirable be extended upwards
therefor as is shewn at A' is placed the desired quantity of grease or oil or other
flux or any other suitable and ordinary material which obviously is supported in
this bottomless chamber so formed as aforesaid by the partition C and the end of
the pot A on and by the surface of the metal in this pot A. The plate to be
treated is passed by hand or otherwise through this flux or other material into the
metal in the pot A and is entered between suitable curved guides D and D' in the
metal being it may be directed and pointed thereinto by adjustable conductors E
and E and along these guides D and D¹ the plate is pushed or taken in any
convenient manner until its leading edge enters between and is caught by a pair of
rolls F mounted across the other end of the pot A in the proper inclined position
at or near or preferably it may be a little below the surface of the metal in this
pot A.
From the pair of rolls F the plate passes out of the coating pot A to another

page_text: pair of rolls G complementarily mounted across the entering end of the dipping
pot B at or near or preferably it may be a little below the surface of the metal in
this pot B and these two pairs of rolls F and G are most conveniently so mounted
in and supported by such brackets which may be common to both or may be in any
manner connected together that the rolls F and G can easily and readily be lifted
thereout and removed when required and we would state that we consider the
brackets H when made and formed and arranged as is shewn in the drawing are
very suitable and convenient for such purpose and object and in this case the
springs F1 and G₁ can be fitted as also is shewn in the drawing to cause the
respective pairs of rolls F and G to be and remain close together and thus to put
the necessary pressure on the plate as it passes between each of such pairs of
rolls F and G.
Over the two pairs of rolls F and G and the adjoining edges of the coating pot A
and the dipping pot B between them is fitted a casing or box or trough K
extending across the pots A and B and supported on and by the same the
bottom of which trough K is curved or recessed to pass over such adjoining
edges of the pots A and B and this bottom L of the trough K is partly open that
is to say two long slots L' and L2 are made therein near or at both sides of the
trough K and extending across the same and therefore also across the pots A and B
being close to and properly placed just above the two pairs of rolls F and G and
the sides of this trough K as also the lower parts of the bottom L thereof extend
downwards so far into the metal in the pots A and B as may be desired to constitute
dips whereby both the slots L' and L2 in the bottom L of the trough K are also
below the surface of the metal and are sealed thereby. In the trough K are fitted
suitable curved guides M a little above the bottom L of the trough K and it may
preferably be parallel with such bottom L and thus the plate when it leaves the
pair of rolls F will after passing through the entering slot L' be guided through
the exit slot L' to the pair of rolls G passing between the guides M which are
above this plate and the bottom L of the trough K which is below the same and
this trough K is duly filled up to the proper required level above that of the
guides M with palm oil or other flux or any other suitable and ordinary material
which likewise obviously is supported in this trough K on and by the surfaces of
the metal in the pots A and B and the top of the trough K may be open or closed
as may be desired. Thus in and by this apparatus and according to the arrange-
ment of the same hereinbefore described in its passage from the coating pot to the
dipping pot the plate will not at any time be exposed to the air and this is
extremely desirable and advantageous.
From the pair of rolls G the plate passes between suitable curved guides N
and N' in the metal in the dipping pot B under one side of and up into a grease
pot P extending across the pot B and supported on and by the exit end of the same
the bottom of which pot P is open and the sides thereof extend downwards so far
into the metal in the pot B as may be desired to constitute dips whereby the
bottom of the pot P is sealed. In the pot P are fitted and arranged the ordinary
brackets R and the plate passes from the guides N and N¹ up between the usual
series of pairs of rolls T and guides V also if desired between the same mounted in
and supported by the brackets R as is customary or as may be convenient and the
lowermost pair of rolls T is preferably at or near or it may be a little below the
surface of the metal in the pot B and of the uppermost pair of rolls T one can very
conveniently be divided transversely into two halves and this pot P is duly filled
up to the proper required level with grease or other suitable and ordinary material
which also obviously is supported in this pot P on and by the surface of the metal
in the pot B.
When the plate passes out of the grease pot P it can be finished off or it can be
further treated in any customary and usual manner or otherwise as may be desired
in each particular case.
This apparatus hereinbefore described can most conveniently and suitably be
made broad enough to receive and treat two plates at one and the same time side

page_text: by side and edge to edge. Any suitable and ordinary or other springs and such-
like appliances may be provided to press the pairs of rolls properly together so
that they can duly hold the plates and all these pairs of rolls may be revolved and
driven at the desired speed and in the required directions through and by any
customary or other gearing in any ordinary or other manner as may be convenient
or expedient or necessary in each particular case.
It is very convenient also to fit a vertical loose sliding rod W on the side of the
trough Khereinbefore described the lower end of which rod W is just above or
near to the entering slot L' in the bottom L of such trough K while the upper end
of this rod W may be above the top of this trough K and may if desired be
connected to and with a bell or gong or any other suitable device or with such
means and appliances as are appropriate and therefore when the following edge of
a plate leaves or is discharged from between the pair of rolls F in the coating
pot A hereinbefore described it will trip or raise this rod W and thus can give
notice to the attendant that another plate may be pushed in to be treated in
inanner aforesaid or it can through and by any appropriate and ordinary or other
means and appliances allow or cause another plate to be so pushed in.
It is very convenient also to make slots or breaks X in and through the curved
guides M in the trough K herein before described in the proper required positions
preferably nearer the exit slot L2 in the bottom L of such trough K than the
entering slot L' in such bottom L the edges of which slots X or the parts of the
guides M that are adjacent to such slots are preferably formed and created as is
shewn in the drawing so that they will not interfere in the smallest degree with the
proper performance by these guides M of their required function hereinbefore
stated and through these slots X a plate can be entered and passed to the pair of
rolls G in the dipping pot B hereinbefore described whensoever as may sometimes
be the case it is desired for any cause to send this particular plate again through
this dipping pot B and the grease pot P.
We have thus described and we have shewn in the accompanying drawing
extremely efficient and convenient forms and styles and methods of construction and
arrangement and fitment of this our apparatus and of the several parts thereof but
we would have it clearly understood that we do in no wise limit ourselves exactly
and precisely thereto for as indeed is sufficiently obvious we may make this our
apparatus and each and all of the several parts thereof in such manner and we
may use and employ and may observe and follow such forms and styles and
methods of construction and arrangement and fitment of the same as may be
necessary or expedient or convenient and suitable or appropriate in each and every
particular case.
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
1. The combination with a coating pot A wherein is mounted a pair of rolls F
and a dipping pot B wherein is mounted a pair of rolls G of a trough K supported
above the same which trough K is provided with a curved bottom L having slots L'
and L2 sealed by the molten metal in the pots A and B and is fitted with curved
guides M above the bottom L and is duly filled with palm oil or other material
above the guides M substantially as and for the purpose hereinbefore described
and declared.
2. The arrangement and combination of parts and appliances constituting our
apparatus for coating metal plates or sheets with tin and other metals substantially
as hereinbefore described and shewn in the accompanying drawing.
DI 74
1
די
TOWA
HART & Co.,
186, Fleet Street, London, E.C., Agents.