Improvements in the Method of Finishing Metal Plates Coated with Tin or other Metal or Alloy and in Apparatus Connected therewith.
Year: 1887

page_text: Date of Application, 25th Mar., 1387
Complete Left, 27th Dec., 1887
Complete Accepted, 27th Jan., 1888
Improvements in the Method of Finishing Metal Plates Coated
with Tin or other Metal or Alloy and in Apparatus Connected
therewith.
We, HENRY FRANCIS TAYLOR and WILLIAM PEDDIE STRUVÉ, both of the firm of
Taylor Struvé Eaton and Price of Neath and Briton Ferry in the County of
Glamorgan Engineers do hereby declare the nature of this invention to be as
follows:-
Heretofore in the manufacture of plates coated with tin or other metal or alloy the
coated plates when leaving the finishing rolls are found to have a thicker coating or
so-called "list" along the bottom edge owing to the plate catching a part of the
head of metal which is squeezed off from the rolls and retained between them above
the nip of the rolls.
This socalled "list" not only involves a loss of coating metal but it also very often
detracts from the usefulness and appearance of the plate. Now according to our
invention we cause the plates to leave the finishing rolls in such manner that the
bottom edge of the plate will leave the nip of the rolls gradually or one bottom corner
before the other so that at most a small portion viz. the portion or corner that leaves
the nip of the rolls last will be found to have such "list." As the one corner of the
plate leaves the rolls before the other the springs or levers which press together the
rolls on the side which the plate has left will by the said pressure close gradually and
the other end will be kept open as long as any part of the plate is between the nip of
the rolls and therefore not allow the plate to come in contact with the aforesaid small
bead of metal when leaving the roll. The means employed for carrying out this
method may be various. One means is to employ finishing rolls made slightly conical
and with the larger diameters at the same end. Another means is to employ parallel
rolls placed at a slight angle or raised at one end above the horizontal level of the
grease or other finishing material. Or we may so construct or arrange the appliance
for lifting the plate into the nip of the exit or finishing rolls that the plate comes out
from them in the aforesaid required direction. Or we may provide special guides or
other appliances for carting the plate as required. By this means an important saving

page_text: in coating metal is effected as stated, while the appearance and usefulness are
enhanced. As an instance of usefulness we may name the application of such coated
plates for printing and decorating on where with our improvement the plate would be
brought down more evenly on the stone enabling the roller of the printing machine
to bear with even pressure over the whole surface of the plate thus producing a clearer
and more sharply defined impression.
The conical rolls and other means described are applicable to the apparatus for
coating and finishing tin and other plates in one operation and in one apparatus
described in the specification of Taylor & Leyshon's patent. dated 4th May 1882
No. 2106, and to finishing apparatus generally.
HENRY FRANCIS TAYLOR.
WILLIAM PEDDIE STRUVÉ.
By Jensen & Son,
77, Chancery Lane, London, W.C.,
Patent Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in the Method of Finishing Metal Plates Coated
with Tin or other Metal or Alloy and in Apparatus Connected
therewith.
We, HENRY FRANCIS TAYLOR and WILLIAM PEDDIE STRIVE both of the firm of
Taylor, Struvé, Eaton and Price of Neath and Briton Ferry, in the County of
Glamorgan, Engineers, 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 :-
-
Heretofore in the manufacture of plates coated with tin or other metal or alloy the
coated plates when leaving the finishing rolls are found to have a thicker coating or
so-called "list" along the bottom edge owing to the plate catching a part of the bead
of metal which is squeezed off from the coating metal or finishing rolls and retained
between them above the nip of the rolls. This so-called list" not only involves a loss
of coating metal but it also very often detracts from the usefulness and appearance
of the plate. Now according to our invention we cause the plates to leave the
finishing rolls at an angle or in such manner that the bottom edge or edges of the
plate will leave the nip of the rolls gradually so that at most a small portion viz.:
the portion or corner that leaves the nip of the rolls last will be found to have such
"list." The means employed for carrying out this method may be various. One
means is to employ finishing rolls made slightly conical, and with the larger diameters
at the same end. Or we so construct or arrange the appliance for lifting the plate
into the nip of the exit or finishing rolls that the plate comes out from them in the
aforesaid required direction. Or we provide special guides or other appliances for
canting the plate as required, but it is advisable not to use any appliance whereby the
edge of the plate is rubbed as it rises into the nip of the rolls.
In the accompanying drawings Figure 1 is a vertical transverse section Figure
a vertical longitudinal section and Figure 3 a plan of a finishing apparatus provided
with two sets of rolls constructed according to our invention. The rolls a and b are
made conical and the cradle d for the plate c is arranged slanting on the lifting rod or
screwfe, e, are the bars on which the cradle slides.
As will be seen in Figure 1 there is in actual work always when the rolls are
pressed against each other a small "bead" g of molten metal above the nip of the
finishing rolls. This "bead clings to the bottom edge of the plate as it is lifted
22
from the rolls and is the cause of the so-called "list."
By the combined action of the slanting cradle d, and the conical rolls a and b, the
plate c entering the nip of the lower rolls a in a slanting direction will leave the upper
rolls in a still more slanting direction and as thus the rolls will be kept apart all
the time the plate is passing through it until the last corner (and not as heretofore the
whole bottom edge) leaves the nip of the rolls, there will be no "list" except on this
last corner.
The cradle and other parts of the apparatus may in other respects be of
any suitable or ordinary form.

page_text: Figure 4 is a vertical longitudinal section through another construction of an
apparatus in which we employ an ordinary square or parallel cradle d in which the
plate is placed, while the rolls a and b are made conical so that the plate e as it passes
up between the rolls a and gradually assumes the slanting position required for the
purpose of our invention.
In the vertical longitudinal section Figure 5 we have shewn another modification
wherein is employed a slanting cradle d but parallel rolls a and by which arrange-
ment the plate is similarly caused to leave the rolls at angle.
By the means described an important saving in coating metal is effected as stated,
while the appearance and usefulness are enhanced. As in instance of usefulness we
may name the application of such coated plates for printing and decorating on, where
with our improvement the plate would be brought down more evenly on the stone
enabling the roller of the printing machine to bear with even pressure over the whole
surface of the plate, thus producing a clear and more sharply defined impression.
The conical rolls and other means described are applicable to the apparatus for
coating and finishing tin and other plates in one operation and in one apparatus
described in the Specification of Taylor and Leyshon's Patent dated 4th May 1882
No. 2106, and to finishing apparatus generally.
Figure 6 is a vertical longitudinal section of the said patented apparatus with our
present improvements applied thereto. The rolls a and bare formed conical and the
cradle d works in a slanting direction on the bars e, so as to assist in canting the
plate into the required position.
The angle at which the edges of the plate leave the rolls in the apparatus herein-
before described and shewn is from about 25° to 45° which we have found suitable.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we
claim is :-
:―
:list
First The improvement in the method of finishing metal plates consisting in
causing the plate to leave the nip of the finishing rolls in a slanting or angular
position in order to avoid the head of molten metal above the nip of the finishing roll
coming in contact with the whole of the bottom edge or edges of the plate as hereto-
fore and for the purpose of thus minimising the amount of or unduly thick
coating metal substantially as set forth.
Second The manufacture and use of conical finishing rolls, and of slanting plate
carrying appliance or cradle, separately or in conjunction, substantially as set
forth.
:-
Third The construction of apparatus for the purpose set forth and substantially
as described and shewn.
HENRY FRANCIS TAYLOR.
WILLIAM PEDDIE STRUVÉ.
By Jensen & Son,
77, Chancery Lane, London, W.C.,
Patent Agents.