provements in the method of koшing Steel and iron bars or Plates for the Manufacture of Tin and Terne Plates.
Year: 1885

page_text: provements in the method of koшing Steel and iron bars or
Plates for the Manufacture of Tin and Terne Plates.
I, JOHN DAVID GREY, of Sarn House, near Bridgend, Glamorganshire, Iron
Manufacturer, do hereby declare the nature of the said Invention, to be as
follows:-
This Invention relates to certain improvements in the method of rolling steel
and iron bars or plates for the manufacture of tin and terne plates, and its main
objects are to reduce the cost of manufacture of tin and terne plates by saving the
first heating and rolling, and also by saving the use of one pair of rolls in each
mill as now used by the trade, and to enable existing plant to produce an increased
amount of work in a given time.
According to the present process of rolling steel and iron bars for the manu-
facture of tin and terne plates, steel or iron blooms (which before being rolled out
into bars in the forge are about 7 inches wide by 4 to 4 inches thick) are placed in
a furnace and heated therein to the required degree, and are then rolled into bars
in a pair of grooved rolls the grooves in which are about 7 inches wide and are
made of such decreasing depths as to admit such blooms of steel or iron and as to
gradually reduce them in thickness down to about gths or inch in the last groove,
according to the size of the plates required in the mills.
After the bars have been passed through the last groove in the bar rolls (and
while still at a very high degree of heat) they are plunged into a tank of water for
the purpose of raising the surface scale formed on them by the rolling process, and
when taken from the water tank they are allowed to get cool before being cut to
the required size for the mills, and consequently their heat is not utilized and is
wasted as in the subsequent process they have to be reheated; and it is one of the
objects of this Invention to avoid this waste of heat and to utilize this heat for the
purpose of reducing the bar or plate to the same thickness to which the pieces are
now reduced, after being reheated and rolled in the first pair of rolls in the mill.
The next process (as now practiced) is to cut the bars, in the bar shears to the
required size and weight according to the size of the plates manufactured in the
mills. For example when rolling the size of 14 × 20 IC plates, the bars are cut
in the bar shears into pieces about 14 inches long by about ths of an inch thick,
and after being cut to the size required the pieces are taken to the mills.

page_text: Each tin and terne plate mill consists of two pairs of rolls one pair being used
for rolling the pieces received from the bar shears into plates and the other pair
being used for finishing the plates to the required size and thickness when finished
in the mills.
When the pieces or plates are taken to the mill, they are placed in a furnace
(known in the trade as a pair furnace) and are heated therein to the proper heat,
and are then taken to the first pair of rolls in the mills and are several times
passed through the rolls crossways of the piece until they are reduced from about.
the of an inch thick into plates varying in thickness from about to the of an
inch on the first heat. The plates are then placed in another furnace to be reheated
the second time for the purpose of reducing the plates down in the finishing rolls
to the proper thickness required in the mills.
To attain the object of this Invention, and in carrying out the present improve-
ments, I proceed to form the steel or iron blooms or plates in the forge by forming
the ingots into blooms of about 14 inches wide or of whatever other width the
plates are required for the mills, by about 1 inch thick, and after thus forming
the blooms in the forge I place them in a furnace and heat them therein to the
required degree, and then remove them to and pass them through a pair of recess
rolls there reducing them down from about 11 inch thick to about of an inch
thick, and while still at a high degree of heat after leaving the recess rolls I pass
the plates through a pair of plain smooth rolls, placed conveniently adjacent to the
recess rolls for the purpose of reducing the plates on the same heating to the same
thickness as the pieces are at present reduced after the reheating and after being
passed through the first pair of rolls in the mills, therefore by passing the plates
while still hot from the recess rolls directly through the said pair of plain smooth
rolls, I am enabled to avoid the said waste of heat caused by cooling the highly
heated plates in the water tank, and by utilizing this heat for the purpose of
reducing the bars or plates as described, to save the expense of reheating and rolling
and also the use of the first pair of rolls in the mills.
After such improved process, the plates are cut to the proper weight required
for the different size plates, and are taken to the mills and reheated and passed
through the finishing rolls lengthways of the plate, and then through the different
stages now practiced by the trade.
D1011 1
1
1007

page_text: Improvements in the Method of Rolling Steel and Iron Bars or
Plates for the Manufacture of Tin and Terne Plates.
I, JOHN DAVID GREY, of Sarn House, near Bridgend, Glamorganshire, Iron
Manufacturer, do hereby declare the nature of the said Invention, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This Invention relates to certain improvements in the method of rolling steel
and iron bars or plates for the manufacture of tin and terne plates, and its main
objects are to reduce the cost of manufacture of tin and terne plates, to dispense
with the first heating and rolling and with the use of one pair of rolls in each mill
as now used by the trade, and to enable existing plant to produce an increased
amount of work in a given time.
According to the present process of rolling steel and iron bars for the manu-
facture of tin and terne plates, steel or iron blooms (which before being rolled out"
into bars in the forge are about 7 inches wide by 4 to 4 inches thick) are placed
in a furnace and heated therein to the required degree, and are then rolled into
bars in a pair of grooved rolls the grooves in which are about 7 inches wide and are
made of such decreasing depths as to admit such blooms of steel or iron, and as to
gradually reduce them in thickness down to about the or inch in the last groove,
according to the size of the plates required in the mills.
After the bars have been passed through the last groove in such rolls, (and
while still at a very high degree of heat) they are plunged into a tank of water
for the purpose of raising the surface scale formed on them by the rolling process,
and when taken from the water tank they are allowed to get cool, and they are
then cut in the bar shears in pieces or plates of the size and weight required for
the mill according to the size of the. plates to be manufactured. For example,
when rolling the size of 14 x 20 IC plates, the bars are cut in the bar shears into
pieces about 14 inches long by about the of an inch thick and after being cut to
the size required the pieces are taken to the mills.
Each tin and terne plate mill consists of two pairs of rolls, one pair being used
for rolling the pieces received from the bar shears into plates, and the other pair
being used for finishing the plates to the required size and thickness when finished
in the mills.
When the said pieces or plates are taken to the mill, they are placed in a
furnace (known in the trade as a pair furnace) and are re-heated therein to the
proper heat, and are then taken to the first pair of rolls in the mills and are several
times passed through the rolls crossways of the piece until they are reduced from
about ths of an inch thick into plates varying in thickness from about to the of
an inch on the first heat. The plates are then placed in another furnace to be again
re-heated for the purpose of reducing the plates down in the finishing rolls to the
proper thickness required in the mills.
To attain the objects of this Invention, and in carrying out the present improve-
ments, I proceed to form the steel or iron ingots or blooms in the forge, or by

page_text: pouring the steel into a mould or moulds, of about 14 inches wide or of whatever
other width the plates are required for the Mills, by about 2 inches thick,
or of any other suitable thickness, and after thus forming the blooms or
ingots of the width required, I place them in a furnace and heat them therein to
the required degree, and then remove them to and pass them through a pair
of recessed or grooved rolls there reducing them in thickness down to about + of
an inch thick, and while still at a high degree of heat, after leaving the recessed or
grooved rolls, I pass the plates through a pair of plain smooth rolls placed
conveniently adjacent to the grooved rolls for the purpose of reducing the plates
on the same heating to the same thickness as the pieces are at present reduced
after the re-heating and after being passed through the first pair of rolls in the
Mills; or the plates may be reduced to such thickness in the grooved rolls without
being passed through the plain rolls, but I prefer using the latter in order to
obtain a smooth surface on the plates;-therefore, by passing the plates while still
hot from the grooved rolls directly through the said pair of plain smooth rolls, or
by effecting the reducing operations at one heating, I avoid the said waste of heat
caused by cooling the highly heated plates in the water tank, and the expense of
re-heating the plates for further rolling, and the present necessity of the first pair
of rolls in the Mills.
After such improved process, the plates are cut to the proper weights required
for the different sized plates, and are taken to the mills and re-heated and passed
through the finishing rolls lengthways of the plate, and then through the different
stages now practiced by the trade.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is :-
1. The herein before described improved method or process of rolling steel or
iron bars or plates for the manufacture of tin and terñe plates; the same consisting,
in forming the steel ingot or iron bloom in the forge of about the required width
of the plates for the mills, and of any required thickness; in subsequently reducing
the thickness to about that at which the plates are at present reduced in the first
pair of rolls in the Mills, at one beating in the recessed or grooved rolls and in
smooth rolls which impart a clean smooth surface to the bar or plate, or in such
recessed or grooved rolls only; and, after the plates are cut in the shears to the
proper size and weight as required for the plates to be manufactured, in rolling the
same in the finishing rolls lengthways of the plates, all substantially as hereinbefore
described.
2. In the aforesaid manufacture, forming the steel or iron ingot or bloom in the
forge of about the required width of the plates for the mills, and subsequently
reducing the thickness thereof as aforesaid at one heating by recessed or grooved rolls
and smooth rolls, or by recessed or grooved rolls only, substantially as herein before
described.
3. In such manufacture, rolling steel ingots or iron blooms in a pair of recessod
grooved rolls into bars or plates, as aforesaid, and passing the latter while still hot
through a pair of smooth rolls for the purpose of imparting a clean smooth surface
thereto, substantially as hereinbefore described.
DAY, DAVIES & HUNT,
Agents for the Applicant.