Improvements in the Treatment and Utilization of Old or Disused Vessels or other Articles of Tin Plate.
Year: 1894

page_text: Date of Application, 5th May, 1894
Complete Specification Left, 5th Mar., 1895-Accepted, 13th Apr., 1895
Improvements in the Treatment and Utilization of Old or Disused
Vessels or other Articles of Tin Plate.
We, FREDERICK REDMAN of Dockhead, Bermondsey in the County of London,
Manufacturer, and THE LONDON AND PROVINCIAL TIN PLATING COMPANY
LIMITED of the same place, Manufacturers, do hereby declare the nature of this
invention to be as follows:--
The object of this invention is to treat old or disused vessels or other articles of
tin plate, such for example as old sardine tins and the like, and to render the larger
or better pieces of which they are composed fit to be again used in the manufacture
of tin plate goods or other goods; also to recover the solder which has been used
in making these vessels.
With this object we first open out or separate the pieces of which the vessels are
composed and eliminate the solder which we collect for subsequent utilization. We
then flatten out those pieces which are sufficiently large and good to be utilized for
the manufacture of tin plate or other goods; we clean these flattened pieces by any
suitable chemical or other treatment and then re-tin them or plate them with
nickel, copper or other desired metal. These re-tinned or plated pieces are thus
reudered fit for use in the manufacture of tin plate or other goods.
The opening out or separating, as hereinbefore stated, of the pieces of which the
vessels are composed, and the elimination of the solder, can be effected by dipping
the vessels in boiling fat or oil, so that the solder which unites the pieces melts and
falls to the bottom of the bath from which it can be subsequently removed; or the
vessels can be placed in a furnace such as that described in Specification No. 7151
of 1892 having a gutter into which the solder which becomes melted by the heat of
the furnace runs and by which it is conducted to a receiver outside; or the vessels
can be opened out by cutters, the parts containing the solder being separated from
the remainder and treated in either of the above ways so as to eliminate and collect
the solder. In all cases the greater part of the solder is recovered.
The flattening of the larger or better pieces can conveniently be effected by
passing them once or oftener between rollers.
When we re-tin the plates we adopt the ordinary tinning process, but inasmuch
as they have, prior to their original tinning, been submitted to the usual scaling
process and other treatments, all that need be done with the flattened plates is to
give them a clean metallic surface and to immerse them in the usual tinning trough.
Further, as these flattened plates generally retain a considerable part of their
original tin coating, this tin becomes mixed with the tin in the trough and is
consequently used again.
In order to allow of rolling several sheets at the same time the cradle of the
grease pot may be provided with suitable guides.
Deted this 5th day of May 1894.
J. C. MEWBURN & ELLIS,
55 and 56, Chancery Lane, London, Patent Agents.

page_text: Improvements in the Treatment and Utilization of Old or Disused.
Vessels or other Articles of Tin Plate.
We, FREDERICK REDMAN of Dockhead Bermondsey in the County of London,
Manufacturer and THE LONDON AND PROVINCIAL TIN PLATING COMPANY
LIMITED of the same place, Manufacturers, 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 :-
The object of this invention is to treat old or disused vessels or other articles of
tin plate, such for example as old sardine tins and the like, and to render the
larger or better pieces of which they are composed fit to be again used in the
manufacture of tin-plate goods or other goods; also to recover the solder which
has been used in making these vessels.
With this object we first open out or separate the pieces of which the vessels are
composed and eliminate the solder which we collect for subsequent utilization. We
then flatten out those pieces which are sufficiently large and good to be utilized for
the manufacture of tin plate or other goods; we clean these flattened pieces by
any suitable chemical or other treatment and then re-tin them or plate them with
nickel, copper or other desired metal. These re-tinned or plated pieces are thus
rendered fit for use in the manufacture of tin plate or other goods.
The opening out or separating, as hereinbefore stated, of the pieces of which the
vessels are composed, and the elimination of the solder, can be effected by dipping
the vessels in boiling fat or oil, so that the solder which unites the pieces melts and
falls to the bottom of the bath from which it can be subsequently removed; or the
vessels can be placed in a furnace (such as that shown in Figures 1 and 2 of the
accompanying drawings and hereinafter described) having a gutter into which
the solder which becomes melted by the heat of the furnace runs and by which it
is conducted to a receiver outside; or the vessels can be opened out by cutters ;
the parts containing the solder being separated from the remainder and treated in
either of the above ways so as to eliminate and collect the solder. In all cases the
greater part of the solder is recovered.
The Hattening of the larger or better pieces can conveniently be effected by
passing them ouce or oftener between rollers.
When we re-tin the plates we adopt the ordinary tinning process, but inasmuch
as they have, prior to their original tinning, been submitted to the usual scaling
process and other treatments, all that need be done with the flattened plates is to
give them a clean metallic surface and to immerse them in the usual tinning trough.
Further, as these flattened plates generally retain a considerable part of their
original tin coating, this tin becomes mixed with the tin in the trough and is
consequently used again.
In order to allow of rolling several sheets at the same time the cradle of the
grease pot used in the tinning process may be provided with suitable guides.
Referring now to the drawings. Figure 1 is a longitudinal section and Figure 2
a transverse section of the furnace herein before referred to, which we preferably
employ for opening out the pieces of which the old tin vessels are composed and
for effecting the elimination of the solder from the tin plate. Figure 3 a vertical
section. Figure 4 a section on the live 4-4 of Figure 3 and Figure 5 a plan of
the grease pot used in the tinning process provided with guides to allow of several
sheets being rolled together as hereinbefore described.
In Figures 1 and 2 A is the furnace proper in which we preferably burn fuel
such as anthracite coal or coke that produces little smoke, B is a heating chainber;
it is shown as divided into two compartments by the wall C but this division is

page_text: optional. D is a plate for causing the heat to be distributed more or less equally
to all parts of the heating compartments. E E are troughs one in each com-
partment into which the old tin vessels to be treated are placed through the top
which is fitted with removable covers F F. The troughs E E are perforated at
the bottom as shown. Below the troughs are gutters G G which are inclined and
lead to the outside of the furnace as shown. It will readily be understood that
the heat of the furnace will melt the solder of the tin vessels placed in the
troughs E E; the vessels consequently open out and the melted solder runs through
the perforations at the bottom of the troughs into the gutters G G which conduct
it to the outside of the furnace where suitable receivers may be placed for it.
The pieces of tin plate remaining in the troughs can be removed through the end
doors H H.
The grease pot shown in Figures 3, 4 and 5 is in its manufacture constructed in
the same manner as the grease pots usually employed in the process of tinning
plates but inasmuch as the plates obtained according to our invention from old tin
vessels are of small dimensions it is desirable for economical reasons to provide for
rolling more than one at a time in the pot. With this object we provide the pot
with guides for the edges of the plates and we make these guides adjustable so
that they can be adapted to the varying sizes of plates we have to deal with.
a a represent the guides of which four are shown but the number is optional; they
are attached at their upper ends to a slotted bar bin the slot of which they are
adjustable and they are secured in the position at which they are for the time
being adjusted by a screw bolts and clamping nuts c c or in any other convenient
manner. These guides serve to guide the edges of the plates g when the plates
are passed down the inclined bars d d in the usual way until their lower ends rest
on the ordinary adjustable support e. ff are stops on the guides a a to prevent
the plates going too far when they are moved by the ordinary mechanism into the
position (shown in dots at g' in Figure 3) from which they are passed up as usual
between the rollers. The other parts of this apparatus being of ordinary
construction require no further explanation.
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 is :-
1. The mode or manner of treating and utilizing old or disused vessels or other
articles of tin plate which consists in opening out or separating the pieces of which
the vessels or articles are composed, eliminating and collecting the solder, then
flattening out the larger or better pieces, then cleaning the flattened pieces and
then re-tinning or plating them, all substantially as set forth.
2. The employment for the purpose of opening out or separating the pieces of
which the vessels or articles are composed and eliminating and collecting the
solder as referred to in Claim 1 of a furnace such as that shown in Figures 1 and 2
in which the solder is melted out from the tin plate pieces, received in a gutter or
gutters and conducted by the gutter or gutters to the outside of the furnace,
substantially as set forth.
3. The employment for the purpose of effecting the re-tinning of the flattened
pieces as referred to in Claim 1, of a grease pot provided with guides, substantially
as herein before described with reference to Figures 3, 4 and 5 whereby several
plates can be treated at one time as set forth.
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1 2008
J. C. MEWBURN & ELLIS,
55 and 56, Chancery Lane, London, Chartered Patent Agents.