Metal Plates and in Apparatus Employed therein.
Year: 1886

page_text: Metal Plates and in Apparatus Employed therein.
We ALBERT THOMAS DAVIES, THOMAS HARRY GRIFFITHS and DAVID GRIFFITHS
all of Morriston in the County of Glamorgan, Manufacturers of Tin, Terne and
Black Plates do hereby declare the nature of our invention for IMPROVEMENTS IN
THE MANUFACTURE OF TIN AND OTHER COATED METAL PLATES AND IN APPARATUS
EMPLOYED THEREIN to be as follows:-
The object of the invention is to improve the manufacture of plates of metal
coated with tin, terne or other similar alloy or substance employed as the coating
material, or as the covering matter, to economise such material and prevent waste
in manufacture; and to enable the successive steps in the operation to, be effected*
with greater celerity and certainty of excellence in results attained by means of
improved apparatus employed in such manufacture.
In carrying our invention into effect we pass the sheets to be coated through
a chamber containing flux, and this may be effected by causing the sheet to enter
the chamber at an oblique angle between a pair or successive pairs of rollers or a
shoot or hopper, or a combination of the two and so into the body of the molten
terne, tin or other matter or alloy adapted to coat the sheets. After having passed
to the body of this bath and into a cradle or support therein contained, the sheets
as they successively enter are raised out again therefrom by means of this cradle
or supporting means and delivered to another pair of rollers which may con-
veniently be arranged horizontally, and submerged in the molten matter, in the
bath and these rollers either alone or aided by guide bars serve to guide the plates
upwards to a chamber, situated above the bath of molten matter, which chamber
or vessel contains a substance such as grease, tallow, palm oil or other suitable
lubricating and protective material and also a pair or successive pairs of rollers,
which rollers serve to equalise and remove superfluity of applied coating material
and pass the plates successively out of the greasy material to be further treated by
dipping, or further coating in a bath of molten tin, terne or coating metal if
desired. The plates from the previous operation pass to a double pot containing
grease, tallow, palm oil or other suitable covering coating or "finishing" matter so
arranged that two coated sheets can be alternately lowered and raised therein by
means of cradles or supports which may be suspended and operated by double T, or
other suitable form of levers, or supports, suitably actuated by a series of rods axes
and levers or otherwise by manual or other power.
•
The shape or construction of the tinning pot we employ is by its constricted
form adapted to confine the molten metal to the least possible space consistent
with a sufficient body of molten metal, and in the sides of the pot are secured
guides which serve to control the motion of the cradle for lifting the plates. The
lifting cradle which may be.of wrought iron or other suitable material, is adapted

page_text: in form to receive and convey the successive plates to the rollers next to operate on
each plate, aided by the said guides or bars.
One arrangement which we find convenient consists of a tinning pot having
its lower sides substantially parallel and whilst of about the width of the
plates, yet of shallow depth from back to front, with its upper part inclined
outwards towards the front, so as to admit of a set of rollers in pairs being
arranged, as already described, for supply of plates to, and other sets for delivery
of plates from, the tinning matter, in order to their passage to the greasing pot or
vessel, and a convenient number of sets of such rollers is five pairs, two pairs on
the supply side and two pairs in the greasing vessel whilst the fifth pair is at the
point where the plates diverge from the course of entry to the course of exit and
may be arranged so that a central roller does double duty alternately forming one
of the inner pair of entering rollers and then of the inner pair of delivering rollers
and this central roller may with advantage be grooved in a longitudinal direction.
The upper rollers of the supply pairs are acted upon by parts under the influence
of a spring or springs borne upon by a lever or levers which can be adjusted as to
the pressure exerted, say, by screw pressure and the effect of such pressure on the
rollers is to give the desired nip. The longitudinal grooves guide the plate into
proper position in the pot.
The adjusting screw nut referred to may be substituted by or supplemented by
spring pressure.
The proper relative motions to the parts are obtained by suitable gearing.
Finger levers suitably pivotted and balanced serve to give inclination to the
successive plates to cause them after entrance to present themselves correctly to
the exit rollers on the rising of the cradle.
1340
Improvements in the Manufacture of Tin and other Coated
Metal Plates and in Apparatus Employed therein.
We ALBERT THOMAS DAVIES, THOMAS HARRY GRIFFITHS and DAVID GRIFFITHS
all of Morriston in the County of Glamorgan, Manufacturers of Tin, Terne and 35
Black plates do hereby declare the nature of our invention for "IMPROVEMENTS IN
THE MANUFACTURE OF TIN AND OTHER COATED METAL PLATES AND IN APPARATUS
EMPLOYED THEREIN, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
The object of the invention is to improve the manufacture of plates of metal 40
coated with tin, terne or other similar alloy or substance employed as the coating
material, or as the covering matter, to economise such material and prevent waste

page_text: in manufacture; and to enable the successive steps in the operation to be effected
with greater celerity and certainty of excellence in results attained by means of
improved apparatus employed in such manufacture.
In carrying our invention into effect we pass the sheets to be coated through a
chamber containing flux or other suitable substance that will beneficially act upon
the sheet before it is passed into the alloy and this may be effected by causing the
sheet to enter the chamber at an oblique angle between a pair or successive pairs
of rollers or a shoot or hopper, or a combination of the two and so into the body of
the molten terne, tin or other metal, matter or alloy adapted to coat the sheets.
After having passed to the body of this bath and into a cradle or on to a suitable
platform or support therein contained which cradle is so balanced in the bath that
it will under the pressure of the incoming plate be pressed downwards when acted
upon by these rollers. Each sheet as it is successively entered and immediately it
leaves the rollers is raised out again therefrom by means of this cradle or
supporting means being thrown forward automatically by balanced fingers and
delivered to another pair of rollers which may conveniently be arranged horizontally,
and submerged in the molten matter, in the bath and these rollers either alone or
aided by guide bars serve to guide the plates upwards to a chamber, situated above
the bath of molten matter, which chamber or vessel contains a substance such as
grease, tallow, palm oil or other suitable lubricating and protective material and
also a pair or successive pairs of rollers, which rollers serve to equalize and remove
superfluity of applied coating material and pass the plates successively out of the
greasy material to be further treated by dipping, or further coating in a bath of
molten tin, terne or coating metal if desired. The plates from the previous
operation pass to a pot containing grease, tallow, palm oil or other suitable covering
coating or "finishing" matter in which the parts are so arranged or duplicated
that two coated sheets can be alternately lowered and raised therein by means of
two cradles or supports the action of which is the same as in the tinning pot.
The shape or construction of the tinning pot we employ is by its constricted or
contracted form adapted to confine the molten metal to the least possible space
consistent with a sufficient body of molten metal, and at the side of the pot are
secured guides which serve to control the motion of the cradle for lifting the plates.
The lifting cradle which may be of wrought iron or other suitable material, is
adapted in form to receive and convey the successive plates to the rollers next to
operate on each plate, aided by the said guides or bars.
One arrangement which we find convenient consists of a tinning pot having its
lower sides substantially parallel and whilst of about the width of the plates, yet
of shallow depth from back to front, with its upper part inclined outwards towards
the front, so as to admit of a set of rollers in pairs being arranged, as already
described for supply of plates to, and other sets for delivery of plates from, the
tinning matter, in order to their passage to the greasing pot or vessel, and a
convenient number of sets of such rollers are four or five pairs, two pairs on the
supply side and two pairs on the greasing vessel whilst the fourth or fifth pair
which are banded is at the point where the plates diverge from the course of entry
to the course of exit and may be arranged so that a central roller does double duty
alternately forming one of the inner pair of entering rollers and then of the inner
pair of delivering rollers and this central roller may with advantage be grooved in
a longitudinal direction.
↓
"
43
The upper rollers of the supply pairs are acted upon by parts under the influence
of a spring or springs borne upon by a lever or levers which can be adjusted as to
the pressure exerted, say, by screw pressure- and the effect of such pressure on the
rollers is to give the desired nip. The longitudinal grooves guide the plate into
proper position in the pot.
The adjusting screw nut referred to may be substituted by or supplemented by
spring pressure.
The proper relative motions to the parts are obtained by suitable gearing.
Finger levers suitably pivoted and balanced serve to give inclination to the succes-
*.*1
1)

page_text: sive plates to cause them after entrance to present themselves correctly to the exit
rollers on the rising of the cradle.
DESCRIPTION OF THE DRAWINGS.
Figure 1 represents in section a side view of the tinning pot, the lower side
walls a a of which are substantially parallel, of about the width of the plates but
of shallow depth from back to front i.e. from a.to a, the upper part a' inclining to
the front to accomodate the rollers 6 6¹ for supplying the plates passed in by the
guide c, to the bath below.
The plates pass down this guide c between the rollers b and b¹ into the carrier or
cradle à between guide bars d¹ serving also as guides to the carrier d and as soon
as this pair of rollers 6 6¹ releases the plate it is at its upper end pressed away by
the swing lever e centred at e¹ and weighted at e' on its shorter arm e³, so that on
the rising of the carrier d by means of counter weight or equivalent means or it
may be by hand lever, the plate. therein will be raised and delivered to the
rollers f, b₁ and by them be passed between the guides g g to the rollers h h and
thence to other rollers i i.
The framing of the apparatus a², shewn in Figures 1 and 2, may be of wrought
iron, cast iron or other suitable material provided with recesses or openings into
which are fitted block bearings to carry the rollers arranged as shewn, and above
is a spring lever a³ acting upon the rollers h and ii then a spring a which acts
on two pegs as as which again act on the bearing blocks k of the rollers ƒ and,b¹
and b and serve to tighten the rollers to the desired extent of pressure which
rollers have on the body longitudinal grooves for the purpose of guiding each
successive plate to its vertical position. Spiral or similar springs may if desired be
interposed between the pressing parts and the roller bearings, or be applied to the
lever below the adjust nut or device.
Motion to the parts is conveyed from the upper driver (1 and 1¹) through an
intermediate wheel (2) to another driver (3) secured to the upper roll and as shewn
this driver on the upper roll gears into another driver on the axis of the roll next
below it and like motion to the other rollers is given by tooth gearing, indicated
by dotted lines.
Figure 2 is a cross sectional view and Figure 3 is a longitudinal section of a
grease pot according to our invention. a a being the front and back walls of the
bath or pot. d being the carrying or cradle frame and the guide bars in the
pot. e is a finger or swing lever weighted at its end e by the adjustable weight e³.
e is another like weighted finger lever, f is a roller which cooperating with the
roller 6' form a pair of first withdrawing rollers delivering the plate to a second
pair g g which again deliver to a third pair h, h.
The roller b¹ in both the arrangements of apparatus shown by Figures 1 and 2
does double duty first as an entering roller cooperating with the roller b and next
as a delivering roller cooperating with roller f.
The cradles or holders d are operated both in this case and in the tinning pot,
shewn by Figure 2, by means of a counterweighted lever, having a centre or
rocking bearing d³ and two arms d' d' the arm d being jointed to dat d¹ and the
arm d' carrying the weight do, serves to raise the plate dropped into it as soon as
ever it is released from the entering rollers b and b¹ and this rising of the holder d
as already described brings the plate up to the rolls fb, the finger lever e aiding
the operation by pressing the plate into a direct line with these rolls f, b³.
In operation the sheet to be coated is passed through the chamber A Figure 1
containing flux or other suitable matter obliquely to rollers b¹ b at foot of guide c
into the holder d in the molten tinning metal or alloy B then up as described
between the rollers f b¹, guides g g, rollers h, h and rollers i, i in the chamber C
which contains grease, tallow or other suitable matter.
The holder d being, as stated, so balanced in the bath that it is pressed
downwards by the incoming sheet as that sheet is pushed in by the rolls b₁b and
"

page_text: immediately the sheet is free of those rolls it is tilted forward automatically by
the balanced fingers e and being raised by the balanced holder d the sheet is
brought up within the grip of the pair of rolls f, b¹-the roller b¹ acting as shewn
in common with both the roller b and f but as the sheet in entering comes
in contact with one side of that roll 61 the direction of motion imparted is
inwards or downwards whilst when pressed by the balanced finger into contact
with its other side and the roller f the direction of motion is outwards or.
upwards, thus enabling the roller b¹ to do double duty.
From this upper chamber C the plates are passed out to the workman who takes
hold of the sheets successively and dips them into a dipping pot and then into a
grease pot the construction of which is shewn by Figure 2 in cross section as
stated and the operation of the parts of which is substantially similar to that of
the tinning pot Figure 1.
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 in the manufacture of tin and other coated metal plates
1. The method of and apparatus for conveying the plates successively into,
through and away from the coating or other matters as set forth.
2. The arrangement or combination of parts of apparatus forming a tinning or
coating pot as described and shewn in respect of Figure 1.
3. The arrangement or combination of parts of apparatus forming a grease pot
as described and shewn in respect of Figures 2 and 3.
4. The construction and employment of an automatic or self acting holder or
cradle d for receiving the plates from one pair of rollers and delivering the same
to another pair of rollers substantially as set forth.
5. The form or construction of the pot for containing the molten metal whereby
the space occupied by the same is confined or narrowed as set forth.
Dated this 30th day of September 1886.
"
WM BROOKES & SON,
55 & 56, Chancery Lane, London,
Agents for the said Albert Thomas Davies,
Thomas Harry Griffiths, and David Griffiths.