Improvements relating to the Closing of Sheet Metal Tins, Cans, or other Vessels.
Year: 1899

page_text: Date of Application, 12th July, 1899-Accepted, 12th Aug., 1899
COMPLETE SPECIFICATION.
Improvements relating to the Closing of Sheet Metal Tins, Cans, or
other Vessels.
I, REGINALD HADDAN, of the Firm of Herbert Haddan & Co., of 18, Buckingham
Street, Strand, W.C., Patent Agent, do hereby declare the nature of this inven-
tion a communication to me from abroad by Ludwig Goldstücker, of Fried-
richstrasse, 122/123, Berlin, N., Manager, 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 tins, cans and the like which are made of sheet metal
and intended to receive liquids, such as paints, varnishes and the like, or any
other materials that may be conveniently kept in such cans, and in which the
lid is fastened down by means of a self-clamping arrangement, without solder,
in order that it may be opened without the use of any special tool. The methods
of constructing these lids previously in use, and as will be more particularly here-
inafter described, have the disadvantage that if the can or the edge of the cover
or lid is bent or otherwise suffers any accidental damage, it does not close tightly
enough, and is apt to allow of leakage. Attempts have previously been made to
avoid such leakage by coating the junction of the lid with the can with some
material which will harden when dry and act as a packing or cement.
In the present invention these disadvantages are removed by making the lid
with a double closing edge by means of which any leakage of the contents of
the tin or the like is completely prevented. In the accompanying drawings
Fig. 1 is a side elevation partly in section showing a can provided with one of
the improved lids: Fig. 2 is a section on a larger scale showing the closing arrange-
ments of such lid in the position in which it is about to be closed; Fig. 3 is a
similar view showing this lid closed; Figs. 4 and 6 are similar views of lids
previously in use; and Figs. 5 and 7 are similar views of the same lids in their
closed position. As shown in the drawing in Figs. 1, 2, and 3, the tin a in the
present invention is provided with a double conical rim 6162 on which the lid c
fits; this lid being also provided with a double rim d' and d². As will be seen
on reference to Figs. 2 and 3 the inner spring-like edge 6 of the tin a is pressed
back by the inner rim d' of the lid e so that both are pressed firmly together.
By the same action the edge of the outside rim of the lid is pressed firmly
on the outer slope 2 of the tin, and this forms a second closing. In this way
the tin is doubly closed, and leakage is absolutely prevented, even if part of the
inner or outer edges of the tin or of its lid should become bent or damaged.
It will be seen from Figs. 5 and 7 that this effect is not produced with lids as
hitherto constructed. In these figs. the ordinary closing lid is shown in dotted
lines and the full lines show the position of the edge of the lid or tin when bent
by accident or otherwise thus producing places which under certain conditions
allow passage from the interior of the tin, provided the closing is not covered
with some special cement or preparation to ensure its tightness.
It may be remarked that the double edge of the lid, and of the can may have

page_text: a rounded form in cross section, but the double conical form shown in the drawing
is to be preferred..
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what
I claim is:-
A lid-closing construction for tins, cans and the like vessels a of sheet metal
in which a double preferably conical rim is made on the tin or the like a to fit
a corresponding double rim upon the lid e, these parts so fitting together that the
back pressure of the inner part 1 by the inner lid rim causes the outer lid
rim to be also pressed fast on the rim 62 of the tin.
Toted this 19th dow of Tul.. 1900