Improvements in Air-tight Canisters and the like.
Year: 1898

page_text: Date of Application, 19th Apr., 1898-Accepted, 28th May, 1898
COMPLETE SPECIFICATION.
Improvements in Air-tight Canisters and the like.
I, EBENEZER THOMAS, of 6, Stanley Terrace, Mount Pleasant, Swansea, Com-
mercial Traveller, 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 :-
This invention relates to air tight canisters and the like of the class in which the
closure is effected by means of a strip of metal, soldered all round to the canister
and to the closing disc or cover, the strip being pulled off to open the canister and
has for its object an improved arrangement for applying the said strip and by
means of which the strip can be readily pulled off for opening the canister or the
like and for facilitating the removal of the cover.
According to this invention a disc or cover is fitted to rest ou a ledge formed on
the interior surface of the canister or the like. A strip of metal is attached at one
end to the disc and is then placed all round in an inclined position. The strip is
soldered at its edges to the disc and to the canister and wires are attached to the
end by means of which the strip can be readily pulled off and when the end which
is attached to the disc is reached, the said disc will be lifted out of the canister and
the contents exposed. When the strip is arranged outside the canister the ledge is
formed to project outwardly and the strip is soldered to the ledge and to the cover
of the canister or the like.
In order to more clearly indicate the nature of this invention reference is had to
the accompanying sheet of illustrative drawings in which
Fig. 1 is a perspective view showing a canister arranged according to this in-
vention.
Fig. 2 is a section of same and
Fig. 3 is a view showing the metal strip.
Figs. 4 and 5 are similar views to Figs. 1 and 2 but having the metal strip
applied on the outside.
Referring first to the arrangement shown in Figs. 1, 2 and 3, a ledge a is formed
on the interior of the canister A and upon this ledge the disc b which just fits the
canister rests. A strip of metal c which is doubled over and attached by solder-
ing or other means at c¹ to the disc b is then placed all round inside the canister A
in an inclined position as shown and its end c² overlaps the end c¹ so that the strip c
completely covers the edge of the disc b. The end c² of the strip c is soldered to
the canister A and is formed with holes in which the wire d is inserted and is
doubled over as shown so as to cover the holes and make them air tight. The
edges of the strip c are then soldered all round to the disc band to the surface
of the canister A the result being an air tight joint all round. A cap e is prefer-
ably also fitted to the canister.
In order to opeu a canister the cap e is first removed, the strip c is pulled away
from the canister at c² by means of the wire d and then detached all round, until
the end c is reached, when the disc b will be lifted out and the contents
exposed.
The soldering used all round for the strip c will of course be sufficiently soft to
allow of the strip c being readily pulled away or in some cases it may be simply

page_text: pressed down by suitable appliances all round, and only soldered at c¹ and c². At c¹
the attachment must of course be of sufficient strength to prevent the strip c
becoming entirely detached from the disc b.
In the arrangement illustrated in Figs. 4 and 5 the ledge a is formed on the
outside of the canister A and the disc b is dispensed with, the attachment being
directly made to the cover e. The strip c is applied in substantially the same
manner as in the arrangement above described.
It will be readily understood that this invention can also be applied to canisters
and the like of square, oval or other shape.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
(1) An improved arrangement for the air tight closing of canisters and the like,
consisting of a disc resting on a ledge formed on the interior surface thereof and a
strip of metal attached at one end to the said disc and passed round in an inclined
position, being finally secured at its other end to the canister itself and its edges
either soldered or not so that, on detaching the strip by means of suitable wires at
one end it can be pulled away all round and will finally lift the disc out and expose
the contents of the canister or the like substantially as described and for the
purposes specified.
(2) An improved arrangement for the air tight closing of canisters and the like,
consisting of a cap fitting on to a ledge formed on the exterior surface thereof and a
strip of metal attached at one end to the canister or the like and passed round
upon the ledge in an inclined position, being finally secured at its other end to the
cap itself and its edges being either soldered or not, so that on detaching the strip
by means of suitable wires at one end it can be pulled away all round and will
release the cap substantially as described and for the purposes specified.
(3) An improved arrangement for the air tight closing of canisters and the like
substantially as described with reference to Figs. 1 and 2 and 3 of the accompanying
drawings and for the purposes specified.
(4) An improved arrangement for the air tight closing of canisters and the like
substantially as described with reference to Figs. 4 and 5 of the accompanying
drawings and for the purposes specified.
Dated this 19th day of April 1890.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.