IMPROVEMENTS IN THE MANU- FACTURE OF TIN AND TERNE PLATES
Year: 1881

page_text: LETTERS PATENT to Daniel Leyshon, of Penclawdd, in the County of
Glamorgan, Tinman, for an Invention of "IMPROVEMENTS IN THE MANU-
FACTURE OF TIN AND TERNE PLATES."
PROVISIONAL SPECIFICATION left by the said Daniel Leyshon at the
Office of the Commissioners of Patents on the 13th May 1881.
_DANIEL LEYSHON, of Penclawdd, in the County of Glamorgan, Tinman.
'IMPROVEMENTS IN THE MANUFACTURE OF TIN AND TERNE PLATES."
In the manufacture of tin and terne plates as ordinarily conducted the plates to
be coated with tin or terne metal, after being pickled and annealed and washed, are
placed in water to await the coating operation. When the plates are to be coated
they are removed from the water and plunged into cold palm oil or grease, from
which they are removed and plunged into a bath of molten tin or terne metal.
They are then withdrawn and brushed to remove the surplus metal, and are plunged
into another bath of molten tin or terne metal, and withdrawn and passed between
rollers and cleaned.
The object of my Invention is to simplify this process and to economise the
materials used.
My improvements consist in covering the water in which the plates are immersed
with a layer of oil, or in using a solution of carbonate of soda or other suitable
alkaline salt instead of water, the said solution being covered with a layer of oil
or used alone, and in the use of a bath of hot grease instead of the cold grease, and
in the use of one bath of molten metal instead of two such baths, and in dispensing
with the brushing of the plates, the second bath of metal and the said brushing
being rendered unnecessary by the use of the hot grease.
In carrying out my said Invention I place the plates after they have been
washed into the said solution of soda or other alkaline salt, or into the bath of
water if the solution of the alkaline salt be not used, and on removing them there-
from I place them in a rack, and allow them to stand until the greater part of the

page_text: moisture has drained off. I then place the plates in the bath of hot grease, and
remove them and place them in the bath of molten tin or terne metal. When the
plates have remained a sufficient length of time in this bath I remove them,
and finish the manufacture by passing them between rollers and cleaning them as
usual.
The use of the solution of soda or other alkaline salt in which the plates are
immersed, and the layer of oil on the surface of the solution or on the surface of
the water, may be dispensed with, and water alone may be used, as usual, if the
plates be thoroughly drained after removing them therefrom and before placing
them in the hot grease.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Daniel Leyshon in the Great Seal Patent Office on the
12th November 1881.
DANIEL LEYSHON, of Penclawdd, in the County of Glamorgan, Tinman.
"IMPROVEMENTS IN THE MANUFACTURE OF TIN AND TERNE PLATES."
In the manufacture of tin and terne plates as ordinarily conducted the plates to
be coated with tin or terne metal, after being pickled and annealed and washed, are
placed in water to await the coating operation. When the plates are to be coated
they are removed from the water and plunged into cold palm oil or grease, from
which they are removed and plunged into a bath of molten tin or terne metal.
They are then withdrawn and brushed to remove the surplus metal, and are plunged
into another bath of molten tin or terne metal, and withdrawn and passed between
rollers working in oil or grease and cleaned.
The object of my Invention is to simplify this process and to economize the
materials used.
My improvements consist in the use of a bath of hot palm oil or grease instead
of the cold palm oil or grease, and in the use of one bath of molten metal instead
of two such baths, the second bath of metal ordinarily required being rendered
unnecessary by the use of the hot grease.
In carrying out my said Invention I place the plates after they have been washed
into the bath of water, and on removing them therefrom I place them in a rack,
and allow them to stand until the greater part of the moisture has drained off; I
then place the plates in the bath of hot grease, and remove them therefrom and
place them in the bath of molten tin or terne metal. When the plates have
remained a sufficient length of time in this I remove them, and finish the manu-
facture by passing them between rollers working in oil or grease and cleaning them
as usual.
The use of the hot oil admits of the brushing of the plates being dispensed with,
fair results being obtained without brushing them after removing them from the
molten metal. In order however to produce the best results I pass the plates
between a pair of roller brushes or rubbers arranged in the bath of oil or grease in
which the finishing rollers work, or I brush or rub them in any convenient way.
My process may be worked with good results if the oil in which the plates are
immersed before placing them in the molten metal be kept at about the temperature
at which tin fuses. A higher or lower temperature may however be used, but I
prefer to keep the said oil at a temperature of not less than four hundred and fifty
degrees Fahrenheit.
Having thus described my Invention of "Improvements in the Manufacture of
Tin and Terne Plates," I wish it to be understood that I claim as my said Invention,
immersing the plates to be coated in a bath of hot palm oil or grease after removing
them from the bath of water and before placing them in the bath of molten metal,
and dispensing with the use of the second bath of molten metal which is required
when the plates are immersed in a bath of cold grease as usual.
In witness whereof, I, the said Daniel Leyshon, have hereunto set my hand
and seal, this Ninth day of November, in the year of our Lord One thousand
DANIEL LEYSHON. (L.S.)