Improvements in Apparatus Employed in Coating Metal Plates or Sheets with Tin, Terne, or Lead.
Year: 1888

page_text: Date of Application, 15th Oct., 1889
Complete Specification Left, 15th July, 1889-Accepted, 17th Aug.,
1889
PROVISIONAL SPECIFICATION.
Improvements in Apparatus Employed in Coating Metal Plates or
Sheets with Tin, Terne, or Lead.
We, EXOCH BRAZIER, of Broad Lanes, Bilston in the County of Stafford, manager
of tin-plate works, and JOHN THOMPSON, of Penn Fields, Wolverhampton in the said
County, managing director of tin-plate works, do hereby declare the nature of this
invention to be as follows :-
According to this invention, a pot or bath which contains the molten coating metal
or alloy is carried within a grease pot or bath below the level of the upper surface
of the grease. A pair of rolls is mounted side by side to revolve within the grease
pot in position over the rear end or side of the metal pot, and curved guides are
carried from the feeding-in side of the grease pot down through the surface of the
grease, thence through the molten metal in the metal pot, and thence upwards
The plates or sheets are
through the grease again to the underside of the rolls.
pushed, preferably endways, through the guides and are thus passed first through
the grease, then through the coating metal, and finally through the grease again,
and are drawn up and delivered by the rolls.
It will be readily seen that the coating pot containing the metal or alloy may be
made very shallow and of such size and shape as will hold the minimum quantity of
metal or alloy for passing the plates or sheets through, as the body of the grease
within the grease pot maintains the metal or alloy at the required degree of
temperature, and renders it unnecessary to have a large body of metal or alloy such
as is usually necessary in order to maintain an equal temperature. The metal pot,
also, being carried within the grease pot, cannot be overheated and any waste due to
overheating of the metal in the pot is therefore avoided; and, moreover, the risk of
leakage from the metal pot is practically obviated, but even should any slight
leakage of metal take place, such is received within the grease pot, from which it may
afterwards be recovered.
The metal pot may be suspended by hangers on which it can be turned up to
empty out the. metal and any burnt grease or dirt which may have settled therein.
The turning up may be effected by the aid of screw pins pivotted to the pot and
passing up through a bar fixed across the top of the grease pot, and the metal pot
may be formed with an inclined end which rests, when the metal pot is in use, upon
a correspondingly inclined end of the grease pot.
In the case of passing short plates through the apparatus above described, pairs of
guide rolls may be employed within the bath for carrying forwards the plates.
The apparatus is designed for employment in giving the finish, and answers the
purpose of a wash-pot" and grease pot combined.
"
STEPHEN WATKINS,
Wolverhampton and Walsall, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Apparatus Employed in Coating Metal Plates or
Sheets with Tin, Terne, or Lead.
We, ENOCH BRAZIER, of Broad Lanes, Bilston in the County of Stafford, inanager
of tinplate works, and JOHN THOMPSON, of Penn Fields, Wolverhampton in the said
County, managing director of tinplate works, 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 :-
In describing this invention reference is made to the accompanying drawings, of

page_text: which figure 1 represents a plan of the improved apparatus for use in coating metal
plates or sheets with tin, terne or lead, and of which figure 2 is a longitudinal
section taken on line of figure 1. The apparatus is for use as a wash pot and
grease pot combined, and supersedes the separate wash pot and separate grease pot
usually employed.
According to this invention a pot cor bath. A which contains the molten coating
metal or alloy is carried within a grease pot or bath B in position below the surface
of the grease therein. The pot A is carried towards its rear end by hangers a
suspended from a bar & passing across the top of the pot B, and rests at its forward
end against a slanting end of the bath B, as shewn. A pair of rolls cc is mounted
side by side to revolve within the grease pot B in position over the rear end of the
metal pot, and curved guides d are carried from the feeding-in end of the grease pot,
down through the surface of the grease, thence through the molten metal in the pot A,
and then upwards through the grease again to the underside of the rolls c c. It is
preferred also to carry a pair of revolving rolls e e at the front end of the pot A for
use in feeding the sheets along the guides and up to the rolls c c.
A pair of loose
plates are fixed by means of bolts g against the inner faces of the sides of the
pot A. These plates carry the ends of rods which support the parts of the guides d
which are between the rolls c and e, and carry also the ends of bars h¹ which support
the lower ends of the parts of the guides which are on the forward side of the rolls e.
The upper ends of the upper of these latter portions of the guides are fixed to a bar b
which passes across the top of the pet B, and the corresponding ends of the lower
of these portions of the guides rest on the slanting end of the pot B. The plates f
carry also the bearings for the rolls e. The lower ends of the hangers a are preferably
fixed to the plates fdirect instead of to the sides of the pot A. The upper roll e is
driven from the spindle of one of the rolls c through the medium of cog wheels
carried by a plate fixed to a part carried up therefor from one of the plates f, as
shewn. When it is required to renew the pot A it is lifted out, together with the
plates guides d rolls e and plate i with the wheels carried by such plate, and is then
unbolted from the plates to which a fresh pot is fixed and the parts then replaced
altogether within the pot B. If the rolls e are dispensed with the plates or sheets
are pushed, preferably endways, between the upper and lower guides d, and are thus
passed first through the grease, then through the coating metal, and finally through
the grease again, and are drawn up and delivered by the pair of rolls c c. If the
rolls ee are employed the sheets need to be pushed down (preferably end ways)
between the guides only until they are caught between these rolls which then deliver
them through the remaining length of the guides and into the rolls c c. It is
preferred to mount a pair of rolls c c above the pair c c so that the sheets or plates
may be acted upon by both the pairs of rolls as they are drawn up out of the metal
pot A, thus giving a better surface and finish and economizing the coating metal.
One roll of each of the pairs c c and c¹ c¹ is set towards the other by means of springs
in the usual or any convenient manner of setting up rolls used for analogous purposes.
The chocks which carry the journals of the outer roll e may be conveniently pressed
forward by means of springs such as that shewn at k, figure 2, and to an enlarged
scale by figure 3. The upper end of this spring is carried in a suitable recess, as
shewn. by figure 2, to prevent, it slipping out of place sideways. The inner roll c¹ is
pressed up in the manner shewn, which is common with rolls of this character.
No flux whatever is used in the above apparatus, but grease only in addition to
the molten metal, and such may consist of palm oil or tallow or of the two combined,
as will be readily understood.
The passing of a sheet or plate through the apparatus above described effects the
purpose usually accomplished by the operations of washing and finishing in separate
pots, and thus the entire process of coating is reduced by one operation.
It will be readily seen that the pot A containing the metal or alloy may be made.
very shallow, and of such size and shape as will hold the minimum quantity of
metal or alloy for passing the plates or sheets through, as the body of the grease
within the grease pot B maintains the metal or alloy at the required degree of

page_text: temperature, and renders it unnecessary to have a large body of metal or alloy such
as is usually necessary in order to maintain an equal temperature. The metal pot,
also, being carried within the grease pot, cannot be overheated, and any waste from
such cause is therefore avoided; and, moreover, the risk of leakage from the metal
pot is practically obviated, but even should any slight leakage of metal take place,
such is received within the grease pot, from which it may afterwards be recovered.
The above apparatus is intended more especially for use with thin sheets say
from about 22 B.W.G. to the thinnest used for coating.
The metal pot may be suspended by hangers on which it can be turned up to
empty out the metal and any burnt grease or dirt which may have settled therein.
The metal thus poured out into the grease pot may be pumped up therefrom in the
usual way.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim in respect of apparatus employed in coating metal plates or sheets with tin,
terne, or lead, is
1. A metal pot carried within a grease pot substantially as described, for the
purpose set forth.
2. The general combination and arrangement of parts forming the apparatus
described with reference to the drawings herewith, for the purpose set forth..
3. The combination of a metal pot A within a grease pot B guides d and rolls c
(and preferably also rolls c¹) substantially as described, for the purpose set forth.
4. The combination of a metal pot A within a grease pot B guides d rolls c (and
preferably also rolls c¹) and rolls e, substantially as described, for the purpose
set forth.
Dated this 13th day of July 1889.