Improved Self Sealing Can.
Year: 1898

page_text: Date of Application, 5th Nov., 1898
Complete Specification Left, 3rd Aug., 1899-Accepted, 23rd Sept., 1899
Improved Self Sealing Can.
We, DAVID MACDONALD, of 23, Grange Avenue, and WILLIAM TASSIE TASSIE,
of 163, Beverley Street, both in the City of Toronto, in the County of York, and
Province of Ontario, Canada, Manufacturers, do hereby declare the nature of this
invention to be as follows:-
Our invention relates to that class of package for paints, jellies, &c. known as
self sealing cans," that is, cans in which the cover is held in position without
the use of solder, and has for its object the production of a can or other vessel
which, while absolutely tight when sealed, can be easily and quickly opened
without injury to the cover, and when opened is absolutely free from internal
circular projections or flanges, and it consists, essentially, of a can body with
an enlarged rim; a cover with an annular recess formed therein, the sides of
which are adapted to embrace the rim; and of a screw threaded through the cover
and adapted to engage a lug upon the side of the body.
Figure 1, is a perspective view of our improved can.
Figure 2, is a perspective view of the under side of the lid, partly broken away
to expose a section of the rim.
Figure 3, is a perspective view of the upper portion of the body of the can.
Figure 4, is a sectional detail showing the lid placed in position for the
operation of sealing the can.
Figure 5, is a similar view showing the lid in the position in which it appears
when the can is sealed.
In the drawings, like letters of reference indicate corresponding parts in the
different figures.
A, is the body of the can, with the enlarged rim B, preferably formed by
turning outward the upper edge of the body in a roll circular in cross section.
C, is the cover, the edge of which is so shaped as to form the upwardly-turned
flange D, and the downwardly turned flange E, enclosing between them the
annular recess F, the bottom of which in cross section is preferably substantially
similarly curved to the top of the rim B.
G, is a lug, preferably bracket shaped, which is connected to the side of the
can in any suitable manner.
H, is a nut securely soldered to the lid. Through this nut is threaded the
screw I, which, when the can is closed, should be directly above the lug G.
Before the cover is placed in position on the can, a flat annular strip of packing,
such as card-board, is inserted within the annular recess F, as shown in Figure 4.
J, are the pail ears which are well known and therefore do not require special
description in the present application.
When the can is to be sealed the cover is placed in position as shown in
Figure 4, and by means of any suitable press forced down into the position
shown in Fig. 5.
As the Hange E, is of such a diameter as to fit tightly within the body A,
of the can, and as the flange D, is made to tightly embrace the enlarged rim B,

page_text: the lid is very securely held in position by the frictional contact between the
parts mentioned. Under most circumstances the fit will also be air and water
tight, but we deem it desirable to use the packing strip of card, as previously
described.
When the cover is forced down into the sealed position, this flat card-board
strip is bent around the curved upper surface of the rim B, and very effectively
seals the joint between the flange D, and body A, and between the flange E, and
the side of the rim B. It also fills up the space between the top of the rim and
the bottom of the annular recess F. It will be found that the can is now so
securely held that great difficulty would be experienced in opening it unless
special means were provided for that purpose.
The screw I, and the lug G, furnish the micans desired. By turning the
screw I, by means of a screw-driver, one edge of the lid is quickly raised again
to substantially the position shown in Fig. 4, when the lid may readily be
removed. As the lid has not been damaged in any way in the process of removal,
it is easily placed in position again by hand, if it be desired to again seal the can.
Many variations of construction might, of course, be made without departing
from the spirit of our invention, and we do not desire to limit ourselves to the use
of the precise construction shown.
While in general the whole can will be formed of sheet metal, yet any material
may be used for the body of the can, and also for the cover, the only limitation
being that the flanges at the edge of the cover be of some material of a springy
or slightly stretchable nature, so that they may be forced over the rim of the
body, and will then firmly embrace it.
From the above description it will be seen that we have devised a self sealing
can which is very simple and cheap in construction; which can be easily and
rapidly sealed; which, when sealed, will be absolutely air and water proof, and
which may be unsealed at any time without destroying the serviceableness of
the cover for future use.
It will further be noticed that the inside of the body of the can has no circular
flanges or projections at the top as is the case with ordinary self sealing cans;
thus the can is very easily emptied and easily cleaned.
Dated this 5th day of November 1898.
WHITE & WOODINGTON,
Rooms 221-225, Birkbeck Bank Chambers,
Southampton Buildings, London, Agents;
Apron Bearing Can.
We, DAVID MACDONALD, of 23, Grange Avenue, and WILLIAM TASSIE TASSIE,
of 163, Beverley Street, both in the City of Toronto, in the County of York, and
Province of Ontario, Canada, 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, reference being
had to the drawings accompanying our Provisional Specification and to the
figures and letters marked thereon, that is to say:―
Our invention relates to that class of package for paints, jellies, &c. known as
"self sealing cans," that is, cans in which the cover is held in position without
the use of solder, and has for its object the production of a can or other vessel
wbich, while absolutely tight when sealed, can be easily and quickly opened

page_text: without injury to the cover, and when opened is absolutely free from internal
circular projections or flanges, and it consists, essentially, of a can body with
an enlarged rim; a cover with an annular recess formed therein, the sides of
which are adapted to embrace the rim; and of a screw threaded through the cover
and adapted to engage a lug upon the side of the body.
Figure 1, is a perspective view of our improved can.
Figure 2, is a perspective view of the under side of the lid, partly broken away
to expose a section of the rim.
Figure 3, is a perspective view of the upper portion of the body of the can.
Figure 4, is a sectional detail showing the lid placed in position for the
operation of sealing the can.
Figure 5, is a similar view showing the lid in the position in which it appears
when the can is sealed.
In the drawings, like letters of reference indicate corresponding parts in the
different figures.
A, is the body of the can, with the enlarged rim B, preferably formed by
turning outward the upper edge of the body in a roll circular in cross section.
C, is the cover, the edge of which is so shaped as to form the upwardly-turned
flange D, and the downwardly turned flange E, enclosing between them the
annular recess F, the bottom of which in cross section is preferably substantially
similarly curved to the top of the rim B.
G, is a lug, preferably bracket-shaped, which is connected to the side of the
can in any suitable manner.
H, is a nut securely soldered to the lid. Through this nut is threaded the
screw I, which, when the can is closed, should be directly above the lug G.
Before the cover is placed in position on the can, a flat annular strip of packing,
such as card-board, is inserted within the annular recess F, as shown in Fig. 4.
J, are the pail ears, which, having been previously patented, do not require
special description in the present application.
When the can is to be sealed, the cover is placed in position, as shown in
Fig. 4, and by means of any suitable press, forced down into the position shown
in Fig. 5.
•
As the flange D, is of such a diameter as to fit tightly within the body A, of
the can, and as the flange E, is made to tightly embrace the enlarged rim B,
the lid is very securely held in position by the frictional contact between the
parts mentioned. Under most circumstances the fit will also be air and water
tight, but we deem it desirable to use the packing strip of card as previously
described.
When the cover is forced down into the sealed position, this flat card-board
strip is bent around the curved upper surface of the rim B, and very effectively
seals the joint between the flange D, and body A, and between the flange E, and
the side of the rim B. It also fills up the space between the top of the rim and
the bottom of the annular recess F. It will be found that the can is now so
securely held that great difficulty would be experienced in opening it unless
special means were provided for that purpose.
The screw I, and the lug G, furnish the means desired. By turning the
screw I, by means of a screw-driver, one edge of the lid is quickly raised again
to substantially the position shown in Fig. 4, when the lid may readily be
removed. As the lid has not been damaged in any way in the process of removal,
it is easily placed in position again by hand, if it be desired to again seal the can.
Many variations of construction might, of course, be made without departing
from the spirit of our invention, and we do not desire to limit ourselves to the use
of the precise construction shown.
While in general the whole can will be formed of sheet metal, yet any material
may be used for the body of the can, and also for the cover, the only limitation
being that the flanges at the edge of the cover be of some material of a springy

page_text: or slightly stretchable nature, so that they may be forced over the rim of the
body, and will then firmly embrace it.
From the above description it will be seen that we have devised a self sealing
can which is very simple and cheap in construction; which can be easily and
rapidly sealed; which, when sealed, will be absolutely air and water proof, and
which may be unsealed at any time without destroying the serviceableness of
the cover for future use.
It will further be noticed that the inside of the body of the can has no circular
flanges or projections at the top as is the case with ordinary self sealing cans;
thus the can is very easily emptied and easily cleaned.
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:
1. In a self-sealing can, a body provided with an enlarged rim, in combination
with a cover having an annular recess formed round its edge, the sides of which
are adapted to tightly embrace the aforesaid rim, substantially as and for the
purpose specified.
2. In a self sealing can, a body provided with an enlarged rim, in combination
with a cover having an annular recess formed round its edge, the sides of which
are adapted to tightly embrace the aforesaid rim, and an annular strip of packing
inserted in the said recess, substantially as and for the purpose specified
3. In a self-sealing can, a body provided with an enlarged rim, in combination
with a cover having an annular recess formed round its edge, the sides of which
are adapted to tightly embrace the aforesaid rim; a lug fast on the side of the
body; and a screw threaded through the cover and adapted to engage the said
lug, substantially as and for the purpose specified.
4. In a self-sealing can, a body and a cover held upon the body by frictional
engagement between suitably shaped portions of the body and cover; a lug fast
on the side of the body; and a screw threaded through the cover and adapted
to engage the said lug, substantially as and for the purpose specified.
5. In a self-sealing can, a body provided with an enlarged rim of curved
section as to its upper surface; in combination with a cover having an annular
recess formed round its edge curved in section to fit the aforesaid rim, and having
its sides adapted to tightly embrace the rim, substantially as and for the purpose
specified.
6. In a self-sealing can, a body provided with an outwardly turned enlarged
rim of curved section as to its upper surface; in combination with a cover having
an annular recess formed round its edge curved in section to fit the aforesaid
rim, and having its sides adapted to tightly embrace the rim, and an annular
strip of normally flat packing placed within the recess, substantially as and for
the purpose specified.
7. In a self-sealing can, a body provided with an outwardly turned enlarged
rim of curved section as to its upper surface; in combination with a cover having
an annular recess formed round its edge curved in section to fit the aforesaid
rim, and having its sides adapted to tightly embrace the rim; an annular strip
of normally flat packing placed within the recess; a lug fast on the side of the
body; and a screw threaded through the cover and adapted to engage the said lug,
substantially as and for the purpose specified.
8. In a self-sealing can, the body A provided with an outwardly turned
enlarged rim B, curved in section as to its upper surface, in combination with
the cover C; the upwardly-turned flange 1), formed on the cover and adapted to
fit closely within the body A; the flange E, formed on the cover, and so shaped
as to tightly embrace the rim B, and also to form the recess F, with curved
bottom, substantially as and for the purpose specified.
9. In a self-sealing can, the body A, provided with an outwardly-turned
enlarged rim B, curved in section as to its upper surface, in combination with

page_text: the cover C; the upwardly-turned flange D, formed on the cover and adapted
to fit closely within the body A; the flange E, formed on the cover and so shaped
as to tightly embrace the rim B, and also to form the recess F, with curved
bottom; the nut H, secured to the cover; the screw I, threaded through the
nut and the lug G, secured to the side of the body, substantially as and for the
purpose specified.
Dated this Thind dow of Avanot A D 1800

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