Improvements in or Additions to Machinery for the Coating of Metals.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in or Additions to Machinery for the Coating of
Metals.
I, WILLIAM THOMPSON LEYSHON, of 30 Wellington Road, Dudley, in the County
of Worcester, Engineer, do hereby declare the nature of this invention to be as
follows
My invention relates primarily to an attachment for removing superfluous metal
from the surfaces of the delivery, exit or finishing rolls employed in the coating
of metals by immersion.
In ordinary rolls, the superfluous metal removed from a plate on its delivery is
allowed to remain upon their peripheries until it becomes so thick that it is squeezed
off only through the medium of the plate being delivered, and as the top surfaces
of the rolls may come in contact with the outside atmosphere, considerable oxidization
ensues, and the accumulated metal becomes cooled and to an extent, solidified in
consequence of which, the free flowing of the metal from the surfaces of the plates
is hindered.
My invention has for its object, the equalizing of the metal coating of the plates
by removing the semi-solidified metal on the surfaces of the rolls, and taken from
the plates by frictional contact, before it can pass a second time to the plate or
a plate under treatment.
According to my invention, I mount within the coating pot, below the surface
of the grease and in direct contact with the full length of the peripheries of the
rolls, wipers, made of asbestos, and preferably cylindrical and encased within open-
fronted sheaths, so as to admit of the material of the inner sides of the said asbestos
wipers coming into intimate or wiping contact with the opposed faces of the
peripheries of the rolls, and which wipers are forced home, or into their acting
positions, through the medium of springs, or through the medium of a counterpoise
weight or weights mounted upon the ends of levers connected to the said wipers
by links or equivalents, or the said wipers may be brought into their acting positions
by screws.
The asbestos wipers strip from the surfaces of the rolls, all the superfluous metal
taken from the plates, so that the returning part of the rolls are always relatively
reed of the metal removed from the plates.
These asbestos wipers are preferably situated at the two opposite sides of the rolls,
nd lignable with their centres, although I do not limit myself to their exact
lispositions relative to the rolls.
If necessary the asbestos wipers, which may be suspended by hanging or other
uitable brackets, may be made to rotate, and be provided with necked or spindle
nds, working within bearings and driven by gear, so that the same may be made
o rotate in opposite directions to the rolls with which they are in contact.
By my improvements, the saving of coating metal upon a box of sheets amounts
a quarter of a pound.
The rolls and the pot may be made to coat sheets one at a time or two or more
t a time. When two plates are required to be coated at the same time, then I make

page_text: he rolls and the asbestos wipers of a greater length than the combined breadths
of two plates and the pot, guides, flux box and other cognate parts of a like
corresponding breadth.
Dated this 20th day of September 1895.
Improvements in or Additions to Machinery for the Coating of
Metals.
I, WILLIAM THOMPSON LEYSHON, of High Street, Dudley, in the County of
Worcester, Mechanical Engineer, 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 :-
My invention relates primarily to an attachment for removing superfluous metal
from the surfaces of the delivery, exit or finishing rolls employed in the coating of
metals by immersion.
In ordinary rolls, the superfluous metal removed from a plato on its delivery is
allowed to remain upon their peripheries until it becomes so thick that it is squeezed
off only through the medium of the plate being delivered, and as the top surfaces
of the rolls may come in contact with the outside atmosphere, considerable oxidization
ensues, and the accumulated metal becomes cooled and to an extent, solidified in
consequence of which, the free flowing of the metal from the surfaces of the plates
is hindered.
My invention has for its object, the equalizing of the metal coating of the plates
by removing the semi-solidified metal on the surfaces of the rolls, and taken from
the plates by frictional contact, before it can pass a second time to the plate or a
plate under treatment.
According to my invention, I mount within the coating pot, below the surface
of the grease, and in direct contact with the full length of the peripheries of the
rolls, wipers, made of asbestos, and preferably cylindrical and encased within opon-
fronted sheaths, so as to admit of the material of the inner sides of the said asbestos
wipers coming into intimate or wiping contact with the opposed faces of the
peripheries of the rolls, and which wipers are forced home, or into their acting
positions, through the medium of springs, or through the medium of a counterpoised
weight or weights mounted upon the ends of levers connected to the said wipers
by links or equivalents, or the said wipers may be brought into their acting positions
by screws.
The asbestos wipers strip from the surfaces of the rolls, all the superfluous metal
taken from the plates, so that the returning parts of the rolls are always relatively
freed of the metal removed from the plates.
These asbestos wipers are preferably situated at the two opposite sides of the rolls,
and lignable with their centres, although I do not limit myself to their exact
dispositions relative to the rolls.
If necessary the asbestos wipers, which may be suspended by hanging or other
suitable brackets, may be made to rotate, and he provided with necked or spindle
ends, working within bearings and driven by gear, so that the same may be made
to rotate in opposite directions to the rolls with which they are in contact.
By my improvements, the saving of coating metal upon a box of sheets amounts
to a quarter of a pound.
The rolls and the pot may be made to coat sheets one at a time or two or more

page_text: at a time. When two plates are required to be coated at the same time, then I make
the rolls and the asbestos wipers of a greater length than the combined breadths
of two plates and the pot guides, flux box and other cognate parts of
corresponding breadth.
like
Figure 1 of the accompanying drawings represents a longitudinal vertical section
of a tinning pot fitted with rolls having asbestos wipers, with the surfaces of the
said wipers coming continuously in contact with the peripheries of the said rolls.
Figure 2 is a topside plan of the same.
a is the pot surrounded by brickwork a¹ and fitted with guides a³, a³, exit and
entrance flux boxes b, b1, coupled rolls c, d, driven by any suitable means and
cylindrical asbestos roll-wipers e, directed throughout the entire lengths of the rolls
and with their surfaces impinging upon the faces of the said rolls which rotate
within flux. These wipers, which remove all superfluous metal from the surfaces
of the finishing rolls c and d, and are enclosed within sheaths, cases or holders f
carried by short arms g', of levers g, turning about centres or pivots g³, carried
by supporting brackets 9³, carried by the holsters 9, within bearings in which the
necks of the rolls work. These levers g, are provided with adjustable weights g³,
for automatically bringing the wipers into contact with the rolls and making them
to exert greater or less pressure upon the rolls surfaces in removing superfluous
molten metal therefrom, the amount of such pressure being determined by the
position of the weights relative to the fulcra of the levers.
Figure 3 represents a vertical section of another form of pot whose finishing
rolls are provided with another form of asbestos wipers.
Figure 4 is a plan of the pot and Figure 5 shows an end of one of the asbestos
wipers and the short arm of the lever carrying it.
d
a is the pot a², a³ the guides, b, the entrance and exit flux boxes, and C,
the coupled rolls, situated at the exit end of the pot and mounted in holsters g*,
and e are asbestos wipers running from end to end of the rolls and carried in sheaths,
holders or cases f, secured to the short arms g¹, of levers g, operated by adjustable
weights, and turning on pins or fulcra ³, carried by outstanding brackets y³,
bolted to the top of the pot.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
First. In pots or machinery for the coating of metals, employing in conjunction
with the rolls in the pot or the finishing rolls at the exit side of the pot, asbestos
wipers, which are kept in close contact with the peripheries of the said rolls and
remove all superfluous coating metal therefrom, substantially as described and set
forth.
Secondly. In pots or machinery for the coating of metals, the auxiliary means for
removing superfluous coating metal from the surfaces of the rolls of the same
substantially as herein described and set forth.
Dated this 20th day of June 1896.
WILLIAM THOMPSON LEYSHON,
By Henry Skerrett,
24 Temple Row, Birmingham, Agent for Applicant.