An Improved Air-tight Lid for 'Canisters.
Year: 1894

page_text: Complete Specification Left, 10th Nov.. 1894-Accepted, 22nd Dec., 1894
PROVISIONAL SPECIFICATION.
An Improved Air-tight Lid for 'Canisters.
I, CHARLES WILLIAM TODD of 22 Wyldes Lane, Worcester, in the County of
Worcester Fitter, do hereby declare the nature of my said invention to he as
follows:-
My invention as for its object an improved air tight lid for canisters for
containing coffee, oatmeal, or any other dry goods & by which the lid can be
readily taken off and put on frequently without in any way affecting its air tight
properties, and this I successfully accomplish in a simple, cheap, & effective
manner.
In carrying my invention into effect I form within the angle of the flange, and
the top of the lid a hollow recess which runs around the lid this being accomplished
by soldering or otherwise securing to the lid a double angle piece of metal which
has previously been formed to fit it. Within the recess previously to soldering
on this inner angle piece I place an endless piece of rubber tube shaped to fit
the canister and a space is left between the ordinary flange of the lid and the
inner flange sufficient for the top edge of the canister to enter which then com-
presses the rubber tube and thus forms an air tight joint. The extreme angle of
the lid is raised above that of the centre of the lid so that the top edge of the
canister can be pushed up above the tube. It will thus be seen that the one part
of the inner angle flange prevents the contents of the tin from coming in contact
with the rubber while it also keeps in the rubber compression.
Dated this 24th day of March 1894.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.
COMPLETE SPECIFICATION.
An Improved Air Tight Lid for Canisters.
I, CHARLES WILLIAM TODD, of 22 Wyldes Lane, Worcester, in the County
of Worcester, Fitter, do hereby declare the nature of my said invention and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
My invention has for its object an improved air-tight lid for canisters for
containing coffee, tobacco, oatmeal, or any other substance and by which the lid
can be readily taken off and put on frequently without in any way affecting its
air-tight properties and this I successfully accomplish in a simple, cheap and
effective manner.
In carrying my invention into effect I form within the angle of the flange and
the top of the lid a hollow recess which runs around the lid this being accomplished
by soldering or otherwise securing to the lid a double angle piece of metal which
has previously been formed to fit it. Within the recess, previously to soldering on
this inner angle piece, I place an endless piece of rubber tube shaped to fit the
canister and a space is left between the ordinary flange of the lid and the inner
flauge sufficiently for the top edge of the canister to enter which then compresses
[Price 8d.1

page_text: the rubber tube and thus forms an air tight joint. The extreme angle of the lid is
raised above that of the centre of the lid so that the top edge of the canister can
be pushed up above the tube. It will thus be seen that the one part of the inner
angle flange prevents the contents of the tin from coming in contact with the
rubber while it also keeps the rubber in compression.
In order that my invention may be clearly understood and more easily carried
into practise I have appended hereunto a double sized sheet of drawings upon
which I have illustrated the nature of my said improvements and the mode of
carrying the same into effect..
Figure 1., is a general view of the canister and lid with the latter removed.
Figure 2., is a section through the lid A and angle box D separately.
Figure 3., is a view of the rubber ring tube C.
Figure 4., is a section through the lid complete.
Figure 5., is an elevation of the interior of the lid.
Figure 6., is a similar elevation to Figure 5 but showing a modification in the
shape of the lid.
Figure 7., is an enlarged section through one side of the lid when detached from
the canister.
Figure 8., is a similar section to Figure 7 but showing the lid attached to the
canister.
Referring to the drawings I form a hollow recess within the angle a¹ of the lid A
by means of the circular plate D which is stamped up into the circular box d¹ which
is soldered to the lid A to form the hollow recess into which the ring of rubber
tube C is first placed. Sufficient space is left between the edge d2 of the box (¹
and the flange a² of the lid A for the top edge of the canister B to enter which
thus compresses the rubber at C' and forms an air-tight joint between the lid A
and the canister B. The extreme angle a¹ of the lid is raised up as shown so that
the top edge b' of the canister can be forced up above the rubber tube. It will be
seen that the angle d' protects the rubber from contact with the contents of the
canister and further that the edge b' of the canister is free from any projection and
consequently the canister can be perfectly cleared of its contents.
My improvements may be applied to canisters of various shapes as for instance
an oval canister as shown by Figure 6 the ring C accomodating itself to any
inequalities in the canister such as the lap of the joint b².
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
-
1st. An improved air-tight lid for canisters, substantially as and for the purpose
herein set forth and shown upon the accompanying drawing.
2nd. An air-tight lid for canisters consisting of the rubber tube C confined in
position by the angle box d substantially as herein set forth and shown upon the
accompanying drawing.
Dated this 9th day of November 1894.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.