IMPROVEMENTS IN TINNING OR SIMILARLY COATING SHEETS OR PLATES OF METAL
Year: 1884

page_text: PROVISIONAL SPECIFICATION..
I, EDMUND MOREWOOD of Llanelly in the County of Carmarthen Tin Plate
Manufacturer do hereby declare the nature of my invention for "IMPROVEMENTS
IN TINNING OR SIMILARLY COATING SHEETS OR PLATES OF METAL
to be as
follows:-
"1
1 When plates or sheets in the process of tinning or coating with melted metal
have obtained their coating and pass on to the after stage of reducing such coating
and giving finish, or appearance to it by passing the plates out through what are
called finishing rollers revolving in contact with finishing flux it is usual to cause
them to rise up between a last or finishing pair of rollers revolving near the surfaco
and in contact with the flux and thus obtain their finish although the coating may
be or is also somewhat or partly reduced by the action of other rollers under, or in
contact with the flux.
But I find that I obtain a lighter coating or what is usually called a better yield
or less weight of coating in proportion to the weight of the iron or steel of the
sheet or plate if I arrange four or more rollers so that they form two or more pairs
more or less abreast or near the surface of the finishing flux and cause them both
to act and work as reducing and finishing rollers up and between which the sheets
or plates rise in making their exit from the finishing flux.
These two or more pair of finishing rollers then although arranged to travel at a
slow speed are able and suited to finish and pass out the coated sheets or plates
produced by a coating or tinning or washing pot or vessel of melted metal which
when used with one pair of finishing rollers is usually called a set.
I cause or arrange so that the sheets or plates before or when they reach these
two or more pair of finishing and reducing rollers which revolve near to the surface
of the flux or in contact with it and between which the plates rise up and out shall
dwell longer in the finishing flux or travel more slowly than they would if only
one pair of finishing and reducing rollers were used in passing the plates or, sheets
up and out of the finishing flux pot.
And to assist me I employ a suitable cradle or rack or transfer arrangement for
feeding or supplying these reducing and finishing rollers.
Having two or more abreast instead of only one pair of reducing and finishing
rollers one workman is still able to attend to both pairs and to pass over and finish

page_text: the usual number of plates although he allows them to travel more slowly and to
drain more completely than if there were only one pair of reducing and finishing
rollers.
If I make two pairs of reducing and finishing rollers out of four rollers abreast
near the surface of the finishing flux I use both to raise the plates or sheets out
of the finishing flux and to give finish.
ر
But I prefer to use more rollers near the surface of the flux and more or less
abreast and then I sometimes use two pairs for passing the plates down and one
or two or more pairs for passing them up-I also sometimes use the advantages as
specified in my Patent N° 5938 December 31st 1883.
I find it well to use a swinging or travelling or transfer rack or cradle or arrange-
ment for feeding the reducing or finishing rollers or receiving or carrying the sheets
or plates to or into or in the finishing flux or rollers.
Also I find it well to make pins or divisions in such racks or cradles or arrange-
ments for holding or carrying the plates or sheets therein to be afterwards passed
into the rollers."
1
I also use a worm wheel or have other arrangements for giving slow even and
steady motion to the two or more pairs of rollers and to avoid as far as possible
wear and tear to the necks or bearings.
Sometimes I find it well to use a guard which is similar to that which I call a
face plate or face plates when under the surface of the flux. This face plate. I now
arrange above around or on the sides of the reducing rectifying and finishing rollers
so as to increase collect confine or retain more or less of the heat or vapour of flux
in the space just above the surface of the finishing flux between or through which
the plates pass up from the reducing rectifying and finishing rollers.
In order to give a better appearance or finish to the plates, or sheets the coating
of which may be more or less drained by dwelling in or in travelling slowly.
through the finishing flux or the reducing or finishing rollers I find it desirable to:
use appliances or arrangements for causing the pores or surfaces of the sheets or
plates to be more closed than usual either before or in the process of coating.or
reducing or finishing so far as I can consistently with the quality of the sheets.
or plates.
At times I cause the sheets or plates to pass out between these finishing rollers
with the flux above their nip at other times below it according to the character
and appearance of coating required.
Sometimes instead of having many pairs of rollers for reducing or finishing in
one finishing pot I use what may perhaps be called two pots for finishing or
reducing rollers.
P
5
,
My object being to work two or more pairs of finishing or reducing rollers more
or less abreast or near the surface of the finishing flux and between which the
coated plates travel in or rise up from the finishing flux at such slow speed that
the said sheets or plates have longer time in travelling or passing into or through
or out of the finishing flux pot than usual-and so that the workman can attend to
and pass on as many plates or sheets as he does when such sheets or plates are
rising up more rapidly or as they usually do from an ordinary pair of reducing or
finishing rollers which are one pair for a set.
And thus I prevent hindrance or delay in the coating or washing, departments
which may proceed at their usual or most convenient speed irrespective of the time
or speed which it is found well or desirable to give in the reducing rectifying
improving or finishing arrangements or department when I use what I call an
extra set.

page_text: COMPLETE SPECIFICATION.
I, EDMUND MOREWOOD of Llanelly in the County of Carmarthen Tin Plate
Manufacturer do hereby declare the nature of my invention for "IMPROVEMENTS
IN TINNING OR SIMILARLY COATING SHEETS OR PLATES OF METAL and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
When plates or sheets in the process of tinning or coating with melted metal
have obtained their coating and pass on to the after stage of reducing such coating
and giving finish or appearance to it. by passing the plates out through what are
called finishing rollers revolving in contact with finishing flux it is usual to cause
them to rise up between a last or finishing pair of rollers revolving near the sur-
face and in contact with the flux and the plates or sheets thus obtain their finish.
Sometimes also the coating is somewhat or partly reduced by the action of other
rollers under or in contact with the flux.
•
Now I find that I obtain a lighter coating or what is usually called a better
yield or less weight of coating in proportion to the weight.of the iron or steel of
the sheet or plate if I arrange four or more rollers so that they form two or more
pairs more or less abreast or near the surface of the finishing flux and cause them
both to act and work as reducing and finishing rollers up and between which the
sheets or plates rise in making their exit from the finishing flux.
These two or more pair of finishing rollers then although arranged to travel at a
slow speed are also arranged so as to be able and suited to finish and pass out the
coated sheets or plates produced by a coating or tinning or washing pot or
vessel of melted metal which when used with one pair of finishing rollers is usually
called a set.
I thus arrange that the sheets or plates shall dwell longer in the finishing flux or
travel more slowly than they would. if only one pair of finishing and reducing
rollers were used in passing the plates or sheets up and out of the finishing
flux pot.
And to assist me I employ a suitable cradle or rack or transfer arrangement for
feeding or supplying these reducing and finishing rollers.
.
Having two or more rollers abreast instead of only one pair of reducing and
finishing rollers one workman is still able to attend to both pairs and to pass over
and finish the usual number of plates although he allows them to travel more
slowly and to drain more completely than if there were only one pair of reducing".
and finishing rollers.
The annexed drawing shews the finishing flux or grease pot which I usually
employ in carrying out my invention.
.
Figure 1 is a transverse vertical section of the pot and Figure 2 is a perspective
view of the cradle for operating the sheets or plates thereon.
a a is the pot, it is made wider than usual to accommodate additional rollers, it
is set in the usual manner with a fire place and flues in order that the grease which
it contains may be kept at a proper working temperature,

page_text: 61 61 and 62 62 are two pair of finishing rollers each pair similar to the single pair
of finishing rollers commonly employed.
Each pair of finishing rollers is supplied also with ordinary driving gear but in
place of driving them at such a speed as is necessary when one pair of rollers is
required to deal with all the sheets or plates which come forward from the
pot containing melted tinning or coating metal I prefer to drive them at a slower
speed which becomes possible and desirable when one pair of rollers has to deal
only with half of the sheets or plates brought forward from the tinning or coating
operation. c¹ c¹ c² c³ are pairs of reducing rollers which may or may not be
employed in connection with the finishing rollers. d d is the stationary frame of
the cradle. e¹e are adjustable rising and falling platforms. f'f' are stems con-
necting these platforms, with arms on axes g¹ g² on which axes there are also
handles gxx h¹ h² are fingers also connected with arms on the axes 91 g³.
hh are inclines on the fingers which by coming against stationary parts of the
cradle cause the fingers to assume the positions indicated by dotted lines when the
handles gxgx are depressed. The action is as follows:-the sheets or plates as
they come forward from the tinning or coating pot are dropped one at a time into
the finishing pot. This is done alternately one sheet or plate is put in by the space
to the right of the pair of rollers b₁ b¹ and it descends until its lower edge rests on
the movable platform e¹ and the next sheet or plate is put in by the space to the
right of the pair of rollers 62 62 and it descends until its lower edge rests on the
moveable platform e².
.Similarly the plates or sheets are taken out alternately between the finishing
rollers b¹¹ and 66. Say the handle glx is first put down the effect is by means of
the fingers h¹ to throw the sheet or plate in the cradle with which these fingers
come into contact over towards the left until the sheet or plate is stopped by
coming against the guide frame of the cradle. Then by the rising of the platform e¹
the sheet or plate is presented to the nip of the rollers c¹ c' and from these it passes
to the rollers b¹ 61. At the next operation the handle g₁x is put down and then
in like manner a sheet or plate emerges through the finishing rollers 62 62. . In the
routine of working the attendant first takes a sheet or plate brought forward from
the tinning or coating pot and drops it into the unoccupied. part of the cradle of
the finishing pot say beneath the rollers b₁ 61-next he receives a finished plate
which these rollers present; then he operates the cradle so as to present a plate to
the rollers baba. Afterwards he receives another sheet or plate from the tinning
or coating pot and drops it beneath the rollers 6² 6³. Finally he raises a plate by
means of the cradle to the rollers.b¹ b¹ and this completes the cycle of operations.
At times I cause the sheets or plates to pass out between these finishing rollers
with the flux above their nip at other times below it according to the character
and appearance of coating required.
Sometimes instead of having many pairs of rollers for reducing or finishing in
one finishing pot I use what may perhaps be called two pots for finishing or
reducing rollers.
My object being to work two or more pairs of finishing or reducing rollers more
or less abreast or near the surface of the finishing flux and between which the
coated plates travel in or rise up from the finishing flux at such slow speed that
the said sheets or plates have longer time in travelling or passing into or through
or out of the finishing -flux pot than usual-and so that the workman can attend
to and pass on as many plates or sheets as he does when such sheets or plates are
rising up more rapidly or as they usually do from an ordinary pair of reducing or
finishing rollers which are one pair for a set.
And thus I prevent hindrance or delay in the coating or washing departments
which may proceed at their usual or most convenient speed irrespective of the time
or speed which it is found well or desirable to give in the reducing rectifying
improving or-finishing arrangements or department.
ン

page_text: 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.) My improvements in the process of coating sheets or plates of metal
consisting in passing the sheets or plates as they come from the pot or vessel.from
which they receive or obtain melted tin or coating metal into contact with finishing
flux and taking them out therefrom alternately between one or other of two (or
more) pairs of finishing rollers by which means I ensure that the finishing operation"
sball not be unduly hurried.
(2.) My improvements in the process of coating sheets or plates of metal con-
sisting in employing two or more pair of rollers revolving at a slow speed in a
vessel or vessels containing flux and operating alternately to receive and deliver
the said sheets or plates by which means I ensure that the action of flux and
rollers upon the sheets or plates shall not be unduly hurried.
CARPMAEL & Co.,
Agents for the Applicant..