Improvements in Paint Cans.
Year: 1890

page_text: Date of Application, 17th Jan., 1890-Accepted, 22nd Feb., 1890
COMPLETE SPECIFICATION.
Improvements in Paint Cans.
I, EDWIN NORTON residing in Maywood in the County of Cook in the State of
Illinois, United States of America, Manufacturer, 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 :-
My invention relates to improvements in paint cans.
The object of my invention is to provide a paint can of simple and cheap construction,
which may be securely closed without the use of solder after the can is filled, by a
seam folded or formed upon the top of the can, so that the ordinary slip-cover may
fit snugly over the same.
In my invention the interior support or shoulder which supports the head and resists
the pressure of the seaming rollers while the seam is being folded is formed by making
an interior annular fold in the can body a slight distance from the top of the same,
so as to leave a flange on the can body above this interior fold or shoulder, which
flange may be folded into a double or other seam with the flange of the can head.
This annular fold or shoulder is formed by first making an inturned annular bead in
the can body, when the can body is placed on a suitable horn, and a punch applied
having an annular groove to receive the flange or edge of the can body which projects
above the bead, and then, upon pressure being applied, the stock in the bead is pressed
into a flat fold or shoulder. As this operation may tend to crack the stock at the fold
or shoulder and thus produce leaks, I roll the end of the can through a solder bath,
or apply solder to the fold in any suitable manner, and thus securely unite the parts
of the fold together. By thus soldering together the parts of the fold the same is also
strengthened and adds materially to the stiffness and rigidity of the can produced by
this annular shoulder. After the interior shoulder is thus formed the bottom end or
head of the can is soldered in place, and then after the can is filled its upper head is
seamed to the upwardly projecting flange on the can body above this interior
shoulder by a suitably rolled or folded seam, preferably by what is known as a
"double seam."
"
In the accompanying drawings, which form a part of this specification, and in which
similar letters of reference indicate like parts, Figure 1 is a central vertical section of
a can embodying my invention. Figure 2 is a similar sectional view of the can body
after the annular bead or groove is folded or pressed into the annular fold or shoulder,
and showing, also, a suitable form of horn and punch for this purpose. Figure 3 is
a similar view of the can body after the inner shoulder has been formed, ready for the
application of the head.
In said drawings, A represents the can body provided with an interior fold, a, in
its stock, formed by pressing an interior annular bead into said form.
a is an upwardly-projecting flange above the annular interior fold or shoulder a,
which flange is folded, with the flange b of the head B, into a suitable folded or rolled
seam, preferably a double seam, as shown in Fig. 1.
Crepresents a slip cover having a depending flange c, which fits over the end of the
can in the ordinary manner. Solder a should be applied on the outside of the can
body at the crevice or joint between the parts of the fold a, so as to securely unite the
parts together, and thereby give additional stiffness and rigidity to the annular fold
or shoulder a, which stiffens the upper end of the can. This solder will also close any
cracks or leaks which might possibly be produced by the operation of pressing the
bead into such fold. The head B should preferably be made of thin stock, so as to be
readily cut or removed. The slip-cover Ċ serves to protect the inner head, B, and also
to close the can after the head has been once cut out.

page_text: D represents a horn, and D' a punch having an annular groove, d, to receive the
upper flange or edge of the can body. The annular rim or shoulder d' of the punch D¹,
should project below the bead in the can body, as shown in Fig. 2, so as to retain the
can body in shape below the bead when the punch is forced down.
The size and form of the bead may be varied without departing from my invention,
as well the degree or extent to which its walls are forced together to form the fold or
shoulder a.
It is this interior fold or shoulder a, which supports the head B and
resists the action of the seaming tools or rollers when the flange b of the head; B
and the flange a¹ of the can body are being folded inwardly to form the seam on top
of the can.
The outer wall or edge of the seam is thus formed on a line with
the wall of the can body, so that the slip-cover C has a secure and snug fit over the
same.
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. The combination, with can body having an interior shoulder consisting of
an interior annular fold, a, in the stock of the can body, the parts of said fold being
pressed together and provided with a flange, a', above said annular shoulder, of a
head, B, having an upwardly projecting Hange, b, turned down and folded, with
the flange on said can body, into a seam, substantially as specified.
2nd. The combination, with can body A, having an interior annular fold, a,
in its stock, the parts of said fold being closed together and the joint or crevice
between the parts of said fold being soldered together, and provided with an upwardly
projecting flange, a¹, of a head, B, having an upwardly projecting flange, b, turned
down and secured with the flange of the can body, substantially as specified.
1000
EDWIN NORTON.
Witnesses:
H. M. MUNDAY.
EMMA HACK.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.