IMPROVEMENTS IN THE MEANS OF CLOSING CANS AND OTHER LIKE RECEPTACLES
Year: 1884

page_text: I, THOMAS GEORGE FONNEREAU DOLBY of Dulwich in the County of Surrey,
Manufacturer do hereby declare the nature of my Invention for IMPROVEMENTS
IN THE MEANS OF CLOSING CANS AND OTHER LIKE RECEPTACLES to be as
follows:-
This Invention relates to the closing of cans and other like receptacles of sheet
metal or other material and adapted for a variety of uses but especially for
containing and preserving butter, lard and other provisions, also paints and other
substances.
The Invention essentially consists in the employment of what I call a plug lid
or plug stopper in combination with a screw for holding down the same.
In carrying out my Invention I take a female screw of sheet metal and of larger
diameter than the opening or mouth of the can (or other receptacle); and I form
this screw with a plain portion at the lower part which is tapered like the mouth
of a stoppered bottle to receive the plug or stopper hereinafter described.
make a sheet metal lid with an upturned flange at its outer edge all round to
form the plug or stopper before referred to and I use in connection with the lid a
screw ring of sheet metal the screw of which fits the female screw before described.
The upturned flange of the lid should be of such diameter as to tightly fit into the
plain part of the female screw which is slightly tapered as before described.
The female screw is soldered or otherwise secured around the opening or mouth
of the can or receptacle to which my Invention is to be applied.
In order to close the can the lid is placed within the female screw and the screw
ring is then inserted into this screw and screwed down so as to force down the lid
until the upturned flange acting like a plug or stopper makes a tight joint or
closing with the tapered plain portion of the fernale screw.
I prefer to raise the middle portion of the lid in order that the male screw may
sooner come in contact with it and produce the requisite pressure thereon; the
raising of the middle of the lid also increases its stability.
It will be evident that the arrangement of the parts may be reversed that is to
say the male screw may be soldere to the can and receive the plug or stopper
within it, while the female screw is the detached piece which is screwed upon the
male screw so as to exert the requisite pressure on the lid.
Dated this 1st day of Janua 1001
J. C. MEWBURN,
Agent for the Applicant.

page_text: "
"
I THOMAS GEORGE FONNEREAU DOLBY, of Dulwich, in the County of Surrey,
Manufacturer, do hereby declare the nature of my Invention for IMPROVEMENTS
IN THE MEANS OF CLOSING CANS AND OTHER LIKE RECEPTACLES 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 the closing of cans and other like receptacles of sheet
metal or other material and adapted for a variety of uses but especially for
containing and preserving butter, lard and other provisions, also paints and other
substances.
The Invention essentially consists in the employment of what I call a plug lid or
plug-stopper in combination with a screw for holding down the same.
In carrying out my Invention I take a female screw of sheet metal and of larger
diameter than the opening or mouth of the can (or other receptacle); and I form
this screw with a plain portion at the lower part which is tapered like the mouth
of a stoppered bottle to receive the plug or stopper hereinafter described. I make
a sheet metal lid with an upturned flange at its outer edge all round to forin the
plug or stopper before referred to and I use in connection with the lid a screw ring.
of sheet metal the screw of which fits the female screw before described. The
upturned flange of the lid should be of such diameter as to tightly fit into the plain
part of the female screw which is slightly tapered as before described. The female
screw is soldered or otherwise secured around the opening or mouth of the can or
receptacle to which my Invention is to be applied.
In order to close the can the lid is placed within the female screw and the
screw ring is then inserted into this screw and screwed down so as to force down
the lid until the upturned flange acting like a plug or stopper makes a tight joint
or closing with the tapered plain portion of the female screw.
I prefer to raise the middle portion of the lid in order that the male screw may
sooner come in contact with it and produce the requisite pressure thereon, the
raising of the middle of the lid also increases its stability.
It will be evident that the arrangement of the parts may be reversed that is to
say the male screw may be soldered to the can and receive the plug or stopper
within it, while the female screw is the detached piece which is screwed upon the
male screw so as to exert the requisite pressure on the lid.
The accompanying Drawings illustrate my Invention applied to a can or tin
whose mouth or opening forms only a portion of the top. Figure 1 is a vertical
section and Figure 2 a plan of the can with the parts in position and the mouth
closed. Figure 3 is a vertical section, and Figure 4 a plan of the plug stopper or
plug lid and Figures 5 and 6 are respectively a vertical section and plan of the
screw ring. a is the can and b the mouth of the same, c is a female screw of sheet
metal and of larger diameter than the mouth b. This screw has a plain tapered
portion d at the lower part to receive the plug or stopper and is soldered around
the can mouth as seen in Figure 1, (or the tapered part d may be made in the can
body in which case only the screw c would be soldered around the mouth). e is a
sheet metal lid with an upturned flange f.at its outer edge to form the plug or
stopper; this flange should be of such diameter as to tightly fit the part d. g is a
screw ring of sheet metal the screw of which fits the female screw c. h is a handle
by means of which the screw ring g is turned. i is a ring on the lid e to enable it
to be lifted or pulled out of the can mouth.

page_text: In applying my Invention to a can or receptacle whose opening is the full
diameter of the can or receptacle the female screw should be soldered around the
outer edge of the mouth.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is
The means herein before described of closing cans and other like receptacles that
is to say a plug lid or plug stopper in combination with a screw for holding it
down, these parts being arranged substantially as set forth.