s for the same.
Year: 1885

page_text: in Covers for the same.
We JOHN ALEXANDER LLOYD and ALFRED LLOYD, both of Bush Lane, in the
City of London, Manufacturers do hereby declare the nature of our invention
for "IMPROVEMENTS IN SHEET METAL CANS, BOXES, OR OTHER VESSELS, AND IN
COVERS FOR THE SAME" to be as follows:-
Our invention relates to cans, boxes, or other vessels of sheet metal such as
tinned plate, and it has for its object a novel method of forming the mouth of such
vessels and the cover by which such mouth is closed when required, in such
manner that the vessels can be readily closed or opened as often as desired, whilst
they are simple, cheaply made, and effective in operation.
Supposing our invention to be applied to an ordinary cylindrical can of tinned
plate, we use such tinned plate sufficiently flexible and ductile in character and we
forn round the open cylindrical end of the can a screwed thread of sufficient depth
and pitch and shape of thread, which may be varied according to the size and
character of the can. This screwed thread is formed preferably by adjusting the
can upon a mandrel in a lathe or other equivalent tool where it can be made to
revolve, and forming the screwed thread by the pressure of a suitable tool by which
the circumference of the can is sufficiently indented to form a helical groove
constituting the thread. Such cans as ordinarily made consist of tinned plate bent
into the form of a cylinder, and having its longitudinal edges soldered or other-
wise united, and the screwed thread is readily formed in the manner described
across such double united part as well as round the remainder of the circumference.
The cap or cover of the can is preferably formed by stamping in the ordinary
well known way, so that its projecting cylindrical flange which fits over the open
end of the can is formed without seam or joint, and round such projecting
cylindrical flange we form in the manner already described a screwed thread
corresponding with that upon the can but of somewhat greater diameter, so that
the cap or cover so formed can when desired be readily screwed upon or unscrewed
from the screwed top of the can.
The upper edge of the can may, if preferred, be bent over inwards so as to form
a flange against which the top of the cover presses when the latter is screwed
down into its place, and a ring or disc of cork or other packing may be inserted
into the cap in order to make a tight joint between it and the top of the can.

page_text: When the can or vessel is of very shallow depth as compared with its diameter,
it may be formed, as well as the cover, of a sheet of ductile metal having a
cylindrical flange formed round it by stamping, the screwed thread being formed
round the flange as described, or the cover, as well as the can itself may be formed
of sheet metal bent into a cylinder and having its edges united as already described,
the circular ends being united to the cylindrical part by solder or otherwise.
It is evident that our invention may be applied to vessels square, rectangular,
or of any other shape, the mouth being formed of a separate cylindrical flange
fixed to it and having a screwed thread formed round it as desired.
By our invention, the covers of cans or other vessels are firmly and strongly
applied and removed without difficulty, the joint between them being readily
made perfectly tight, and they are very simple, cheap, and effective.
1
20
1
CT
1007

page_text: in Covers for the same.
We, JOHN ALEXANDER LLOYD and ALFRED LLOYD, both of Bush Lane in the
City of London, Manufacturers, do hereby declare the nature of our said invention
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement and accompanying drawing
(that is to say):-
Our invention relates to cans, boxes, or other vessels of sheet metal such as
tinned plate, and it has for its object a novel method of forming the mouth of such
vessels and the cover by which such mouth is closed when required, in such
manner that the cans or vessels can be readily closed or opened as often as desired,
whilst they are simple, cheaply made, and effective in operation.
In the accompanying drawing, which is in illustration of our invention, figures 1,
2, 3, 4, 5, 6, 7, and 8, represent an ordinary cylindrical tin can, figure 1 being a
vertical section figure 3 a transverse section, and figure 2 a vertical section of a
cover for the saine. Figures 4, 5, and 6 are similar views of the same can and
cover having our invention applied to them for the purpose of attaching the cover
to the body of the can.
Figure 7 is a side view, and figure 8 a section of the same can having the cover
fitted upon it. The same letters of reference indicate the same parts in the several
figures.
a is an ordinary cylindrical can of tinned plate, sufficiently flexible and ductile
in character, provided with a bottom c, fixed upon it in the usual way.
Round the open cylindrical end of the can we form a screwed thread d of
sufficient depth and pitch and suitable shape of thread which may be varied
according to the size and character of the can. This screwed thread is formed
preferably by adjusting the can a upon a mandrel in a lathe or other equivalent
tool where it can be made to revolve, and forming the screwed thread by the
pressure of a suitable tool by which the circumference of the can is sufficiently
indented to form a helical groove constituting the thread d.
The longitudinal seam of the can at b is soldered or otherwise united in the
usual way, and the screwed thread d is readily formed in the manner described
across such double united part as well as round the remainder of the circumference.
The cap or cover e of the can is preferably formed by stamping in the ordinary
well known way, so that its projecting cylindrical flange which fits over the open
end of the can a is formed without sean or joint, and round such projecting
cylindrical flauge we form in the manner already described a screwed thread f
corresponding with that d upon the can but of somewhat greater diameter, so that
the cap or cover so formed can when desired be readily screwed upon or unscrewed
from the screwed top of the can.
The upper edge of the can a may, if preferred, be bent over inwards so as to
form a flange against which the top of the cover presses when the latter is screwed
down into its place, as shewn at g in figure 8, and a ring or disc of cork or other
packing may be inserted into the cap as shewn in order to make a tight joint
between it and the top of the can.

page_text: When the can or vessel is of shallow depth as compared with its diameter, it
may be formed as well as the cover, of a sheet of ductile metal having a cylindrical
flange formed round it by stamping as illustrated in figure 10, the screwed thread
being formed round the flange as described; or the cover, as well as the can itself
may be formed of sheet metal bent into a cylinder and having its edges united as
already described, the circular ends being united to the cylindrical part by solder
or otherwise.
It is evident that the cap or cover may be made of such diameter as to screw
inside instead of outside the can.
The upper screwed part of the can may be made of different diameter to the
remainder, before the screwed thread is formed upon it.
Our invention may be applied to vessels square, rectangular, or of any other
shape, the mouth being formed of a separate cylindrical flange fixed to it and
having a screwed thread formed round it as described, and as illustrated in section
in figure 9.
By our invention, the covers of cans or other vessels of sheet metal are firmly
and strongly applied and removed without difficulty as often as desired, the joint
between them being readily made perfectly tight, and they are very simple, cheap,
and effective.
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 :-
In sheet metal cans, boxes, or other vessels, the method of attaching the cap
or cover, by means of a screwed thread formed round the can, box, or vessel,
and the cap or cover, respectively, substantially as described and shewn in the
drawing.