Improvements in the Lids and the Securing of the same to the Bodies of Round Tin Plate or other Sheet Metal Cans.
Year: 1886

page_text: Improvements in the Lids and the Securing of the same to the
Bodies of Round Tin Plate or other Sheet Metal Cans.
ARCHIBALD NEIL, Tinsmith & Ironmonger, Graham Street Aidrie North Britain,
LOUIS JACKSON, Engineer, William Street Wakefield Yorkshire do hereby declare
the nature of this invention to be as follows:-
Our invention relates to those classes of sheet metal cans used for containing
liquid paints, varnishes, oils, preserved fruits, preserved meats, condensed milk and
other liquids and solids which require to be packed in airtight vessels Our object
is to fix to the bodies of the above named cans covers or lids which when in
position are perfectly airtight or watertight without soldering fast and to be at the
same time easily removed from the bodies. To attain this object we employ a
combination of parts as described.
.
In one modification of our invention we employ an inner and an outer lid or
cover. The inner lid after having its outer surface corrugated or cressed in the
form of a screw thread for the whole of its depth is soldered on to the body of the
can. A round hole is also cut out of the flat part of this inner ring or lid to allow
of the can or cans being filled. The hole in the ring being of such a size as to
leave a flange all round the top which acts as a shoulder for the bevilled or sunken
part of the outer lid to come in contact with when screwed in position as described
further on. The outer ring or lid is screwed on its inner surface for its whole
depth and made to exactly fit the inner ring which is soldered to the body as
before stated. The top is sunken or recessed in the form of a bevel running
gradually from the outer surface or edge towards the centre of the lid. When this
outer lid is screwed in position the bevelled or sunken part comes in contact with
the flange of the inner ring thus forming a perfectly airtight joint without solder,
and at the same time allowing of the lid to be easily removed by unscrewing
the same.
In another modification of our invention where the joint is not required to be of
as perfect a construction, we dispense with the inner ring and corrugate or cress
the mouth of the body of the can in the form of a screw thread on its outer surface
for a depth equal to the depth of the outer lid as herein before described. The
outer lid or cover is then screwed on the mouth of the body of the caD, In this
modification, to form a joint a piece of prepared paper or cloth or any similar soft
suitable material is placed in the inside of the lid, so that when the lid is screwed
down on to the body of the can, the top edge comes in contact with the soft paper
or cloth and by the pressure which is brought to bear by screwing down the lid
the joint is made tight.
A
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page_text: Bodies of Round Tin Plate or other Sheet Metal Cans.
We, ARCHIBALD NEIL, Tinsmith and Ironmonger, Graham Street, Aidrie, North
Britain, and LOUIS JACKSON, Engineer, Willian Street, Wakefield, Yorkshire, 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, that is to say :-
Our said Invention relates to sheet metal cans for containing liquids, paints
varnishes, oils, preserved fruits, preserved meats, condensed milk, and other liquids
or solids which require to be packed in airtight vessels. Our object is to provide
such cans with lids or covers which are constructed and secured in an improved
manner, and which when in position are perfectly airtight and watertight, whilst
they can be easily removed without cutting or injuring any part or rendering
them unsuitable for being used over again any number of times. In carrying out
our Invention we form a screw thread in the rium or cylindrical flange of the lid or
cover, and this screw thread engages with one formed on the body of the can or on
a part soldered thereto, whilst with such screw threads we combine certain parts
and configurations specially adapted for securing the desired tightness when the
lid is screwed on to the body of the can.
And in order that our said Invention and the manner of performing the same
may be properly understood we hereunto append a sheet of explanatory drawings
to be hereinafter referred to and representing several modifications of our improved
lidded cans.
One modification is shown in figures, 1 to 5, of the drawings, figure, 1, being a
plau, figure, 2, a vertical section of the can with the lid closed; and figures, 3, 4,
and 5, are a plan, side elevation, and section of a part which is soldered to the can
for the purpose of receiving the lid. The lid, L, is first struck-up or formed with
a cylindrical flange, F, and then a screw thread is formed on the flange this thread
being by preference of a rounded shape. The thread may be formed by placing
the lid on a mandril in a screw cutting lathe and by applying a milling tool to
indent the metal of the flange, F, into the hollows of a thread formed on the
mandril. In this modification the lid, L, is also formed with its disk part dished
or recessed so as to present a bevilled part, B, round its inner side. The part
shown in figures, 3, 4, and 5, consists of a cylindrical flange, C, and a flat annular
flange, D, combined (and which might be described as a lid with a large part of its
disk cut out leaving the flange D). A suitable screw thread is formed on the
flange, C, and then the part C, D, is soldered upon the can body, A, in the position
in which it is shown in figure 2. When the lid, L, is screwed on, its internal
Levil, B, bears on the flange, D, close to its inner edge, and the parts being slightly
elastic a perfectly tight joint is formed by screwing on the lid sufficiently. If
preferred the body, A of the can may have a screw thread formed on it to receive
the part C, D.
In a second modification shown in plan in figure, 6, and in vertical section in
figure, 7, the lid, L, is made with an entirely flat disk, whilst the annular flange, D,

page_text: fixed to the body, A, is made of a bevilled or conical form so that the lid, L, bears
upon its inner edge, and makes a tight closure.
In a third modification shown in vertical section in figure, 8. The screw thread
to receive the lid, L, is formed on the body, A, itself and the lid is dished or
shaped with a bevilled part, B. The edge of the can body, A, is made as true as
possible so that the bevilled part, B, may bear evenly on it and a ring of cloth, or
soft paper, or other suitable compressible material is placed in the groove which
the bevilled part forms round the inside of the lid; and a tight joint is formed by
screwing the lid well down.
A fourth modification is shown in plan in figure, 9, and in vertical section in
figure, 10, and is one in which no screw thread is shown externally when the lid or
cover is closed; but in other respects we do not consider it preferable to the other
modifications. The lid, L, has fixed to it a part formed with a screw-threaded
flange, G, and with a flat annular flange, H, and a similar part is soldered inside of
the can body, A, this part having a screw threaded flange, J, into which the lid
can be screwed and a bevilled annular flange, K, against which the annular
flange, H, of the lid bears when the lid is screwed well down.
Figure, 11, is a plan and figure, 12, is a vertical section of a can of larger size
than the cans shown in the other figures, but with the lid and parts for securing
it the same as those of the first modification shown in figures, 1 to 5. With
increased size greater force is required for unscrewing the lid or for screwing it
tightly upon the can; and in figures, 11 and 12, the lid, L, is shown as having
fixed to it a lug or staple, S, into which a small bar or any convenient instrument
can be inserted to give leverage for turning the lid. This staple, S, is by preference
made as shown so as to be entirely within the recessed or dished part of the lid,
and if desired it may be applied to any size of our improved lidded cans.
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
The improved sheet-metal lidded cans having screw threads on the lid to screw
upon or into corresponding screw threads on the can bodies such screw threads
being combined with narrow annular flanges or parts for forming tight joints
substantially in the manner hereinbefore described.
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