IMPROVEMENTS IN APPARATUS OR APPLIANCES EMPLOYED IN THE MANUFACTURE OF TIN PLATES
Year: 1876

page_text: LETTERS PATENT to Francis Prange, of Liverpool, in the County of Lancaster,
Merchant, for the Invention of "IMPROVEMENTS IN APPARATUS OR APPLIANCES
EMPLOYED IN THE MANUFACTURE OF TIN PLATES." A communication from
abroad by Lewis Mannstaedt, of Westphalia, in the Kingdom of Prussia.
PROVISIONAL SPECIFICATION left by the said Francis Prange at the Office
of the Commissioners of Patents on the 17th June 1876.
"IM-
FRANCIS PRANGE, of Liverpool, in the County of Lancaster, Merchant.
PROVEMENTS IN APPARATUS OR APPLIANCES EMPLOYED IN THE MANUFACTURE OF
TIN PLATES."
The object of the Invention is to facilitate and cheapen the manufacture or pro-
duction of tin plates of good and fine qualities. For that purpose the following
operations are performed in the order named by the apparatus or appliances con-
structed and operating in combination, as hereafter described :-First, wet rubbing;
second, tinning; third, greasing; and fourth, dry rubbing.
The apparatus for wet rubbing consists of one or more pairs of brushing rollers;
three pairs are preferred, the first two pairs working in and with water, and the
last pair without water. The speeds under the best arrangement vary so as to
obtain more effectual cleaning; the first pair may run at 30, the second at 48, and
the third at 68 revolutions in a minute.
The tinning apparatus consists of two tanks, each with a pair of rollers. The
level of the melted tin in both tanks stands a little above the upper roller, and is
covered in the second tank with a thin layer of grease. In the first tank there is a
narrow box or frame filled with hydrochloric or other acid. The plates from the
rubbing apparatus pass through the said acid, and are conducted by a guide or
guides, to and between the rollers, thence by another guide or guides out of the
tank edgewise and onwards into the second tank. Such second tank does not
contain acid, but is provided with the rollers as mentioned, and also with the guide
or guides.
Greasing is effected in a tank containing two pairs of rollers the one pair con-
siderably below the surface of the melted grease, and provided with guides for

page_text: directing the sheets upwards to the higher pair, from which latter the greased sheets
are delivered.
The apparatus for dry rubbing consists of two or more pairs of rolls; four are pre-
ferred, one pair having a roller or intercepting piece for removing and rolling back
into the tank any matter brought over with the plates. Under one arrangement
with four pairs of rollers the first revolves 30, the second 45, the third 68, and the
fourth 100 times a minute; and the intercepting roller for removing matter carried
over is below the third pair.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Francis Prange in the Great Seal Patent Office on the 16th December
1876.
FRANCIS PRANGE, of Liverpool, in the County of Lancaster, Merchant.
"IM-
PROVEMENTS IN APPARATUS OR APPLIANCES EMPLOYED IN THE MANUFACTURE Of
TIN PLATES." A communication from abroad by Lewis Mannstaedt, of Westphalia,
in the Kingdom of Prussia.
The object of the Invention is to facilitate and cheapen the manufacture or pro-
duction of tin plate of good and fine qualities. For that purpose the following
operations are performed in the order named by the apparatus or appliances con-
structed and operating in combination, as hereafter described :-First, wet rubbing;
second, tinning; third, greasing; and fourth, dry rubbing.
The apparatus for wet rubbing consists of one or more pairs of brushing rollers;
three pairs are preferred, the first two pairs working in and with water, and the
last pair without water. The speeds under the best arrangement vary so as to
obtain more effectual cleaning; the first pair may run at 30, the second at 48, and
the third at 68 revolutions in a minute.
The tinning apparatus consists of two tanks, each with a pair of rollers. The
level of the melted tin in both tanks stands a little above the upper roller, and is
covered in the second tank with a thin layer of grease. In the first tank there is
a narrow box or frame filled with hydrochloric or other acid. The plates from the
rubbing apparatus pass through the said acid, and are conducted by a guide or
guides to and between the rollers, thence by another guide or guides out of the
tank edgewise and onwards into the second tank. Such second tank does not
contain acid, but is provided with the rollers as mentioned, and also with the guide
or guides.
Greasing is effected in a tank containing two pairs of rollers, the one pair con-
siderably below the surface of the melted grease, and provided with guides for
directing the sheets upwards to the higher pair, from which latter the greased sheets
are delivered.
The apparatus for dry rubbing consists of two or more pairs of rolls; four are pre-
ferred, one pair having a roller or intercepting piece for removing and rolling back
into the tank any matter brought over with the plates. Under one arrangement
with four pairs of rollers, the first revolves 30, the second 45, the third 68, and the
fourth 100 times a minute; and the intercepting roller for removing matter carried
over is below the third pair.
Figs. 1, 2, 3, 4, and 5 are sectional elevations of apparatus or appliances arranged
for carrying out my Invention.
Fig. 1 represents the apparatus or appliances for wet rubbing, and is provided with
three pairs of brushing or rubbing rollers a, a¹; b, b¹; c, c¹. The rollers, as will be
seen, are formed of metal coated with wood surrounded with a layer or sheet of cocoa-
nut, Manilla, or like cloth to form a rubbing surface. Water is supplied to the two
first pair of rubbing rollers by the pipes d. If desired, water may, as shown, be also

page_text: supplied to the last pair of rollers. The sheets of metal pass through in the direction
of the arrows. e, framework.
Figs. 2 and 3 illustrate the first and second tinning tanks. The first tinning tank
is provided with a chamber g, which may be adjustable in position for holding acid;
h, h, rollers preferably formed of cast iron; i, guide pieces. The molten tin rises
in the bath to the height shown by the dotted line. c, framework. A layer of
grease rests on the molten metal in the second tank.
Fig. 4 illustrates the greasing apparatus or appliances. Here two pair of rollers
jk, k, are employed. The pair of rollers j, j, are considerably below the surface
of the grease . The higher pair of rollers k, k¹, serve for delivering the tinned
sheets; i, guide pieces; e, framework.
Fig. 5 illustrates the dry rubbing apparatus or appliances. Here three pairs of
rollers are employed m, m²; n, n¹; o, o¹. An intercepting piece p is provided to
wipe off any grease and water carried round by the upper roller m, and cause such
grease and water to fall into the tank q. The rollers are coated with wood, caout-
chouc, or like substance, and rotate at different surface speeds.
In all the views like letters denote like parts, and the arrows show the direction
of motion.
Having now described the nature of the said Invention in such manner that
others will be enabled to carry ny improvements into effect, I claim, the improve-
ments in apparatus or appliances employed in the manufacture of tin plates, sub-
stantially as herein set forth.
In witness whereof, I, the said Francis Prange, have hereunto set my hand
and seal, the Fifteenth day of December, in the year of our Lord One
thousand eight hundred and seventy-six.
Witness,
J. JOHNSON,
Patent Office,
Clayton Square,
Liverpool.
FRANCIS PRANGE. (L.S.)