Improvements in and relating to Sheet Metal Vessels.
Year: 1895

page_text: Date of Application, 17th Sept., 1895-Accepted, 14th Dec., 1895
[Communicated from abroad by FREDERICK EDWARD HEINIG, Manufacturer, of
228 8th Street, Louisville, Kentucky, U.S.A.]
Improvements in and relating to Sheet Metal Vessels.
I, WILLIAM HUMPHREY WHEATLEY of the Firm of Wheatley & Mackenzie
Engineers and Patents Agents of 40 Chancery Lane London 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 :-
This invention relates to sheet-metal vessels and an improved process of
manufacturing the same, to be used particularly as receptacles for the transportation
of lard and similar substances, and is hereinafter more fully described, and
specifically pointed out in the claims.
In the annexed drawings similar letters of reference denote corresponding parts
in all views in which Figure 1 is a sectional side elevation of a part; Fig. 2 is a
side elevation of the same in connection with the device for closing it, and Fig. 3 is
a vertical cross section through the cover.
The body of the pail shown at 1 and its upper edge is beaded by being turned
inwardly, and may be strengthened by a wire ring 5. The cover of the vessel is
shown at 2 and has a flange 4 fitting over the upper edge thereof. The cover is
dome shaped with a central depression and with an annular marginal depression
inside the line of the flange, and when the cover is placed in position this annular
depressed part is still further depressed to cause it to extend beneath the beaded
edge of the vessel, leaving a slight space between its point of contact with the
body portion and said edge as shown in Figure 2.
3 is an annular bead which serves to stop the downward thrust of the cover, and
may be plain or ornamental at will. 6 is the bail by means of which the vessel is
carried, and 7 are the ears by means of which the bail is connected to the body of
the pail.
An annular flange is also shown at the bottom of the pail, which flange is formed
by the union of the bottom with the side walls thereof.
I first manufacture the body of the vessels 1 with inturned head 5, and provide
the bead 3, while the top or cover is made dome shape as shown, with straight
downturned flange 4 adapted to fit closely over the neck of the vessel 1.
The cover is placed in position ou the body, the clamping collar F is placed in
position to hold the flange 4 and the whole is placed in position on a suitable
platform of any machine adapted to perform the work of finishing.
Having the parts in position the forming rolls H are brought to bear upon the
metal of the top with sufficient force to bend the same in, to force the metal of the
top in and around the head 5 of the body of the vessel, thus securely holding it in
position to prevent displacement thereof.
It is essential that the vessel be provided with the inturned head 5 or its
equivalent in order that the metal of the cover may embrace the same, and I so
construct the head that it will have an inclosed wire reinforce as it thereby gains
strength, and provides a stop to prevent accidental displacement of the cover after
it is secured in its final position.
To prevent swelling of the lower portion of the flange 4 while closing the metal
of the top in upon the head the clamping collar F is required, or some equivalent
must he substituted.

page_text: When the parts are forced into the position as shown in Figure 2, it will be
impossible for said cover to be accidentally displaced, and the sealing thus
effected is practically air tight, and will prevent the contents of the pail from
leaking out.
It will be observed that the dome shaped portion of the cover furnishes a surplus
of material, thus allowing the marginal portion to be forced under the bead 5
without stretching the metal of the top in its whole surface.
No claim is made in this application for the peculiar mechanism shown to carry
out the steps of manufacture, but for a better understanding thereof the same is
here described in brief.
Referring to the drawing D is a suitable spindle to hold the operative parts in a
chuck or other clamping device; E-E are the arms of a two part yoke carrying
the rolls, E' E' designed to hold the clamping collar down. H-H are forming
rolls which bend the sheet metal down and under the head 5. K is a thrust block
into which the inner ends of the levers H¹ are held, and by means of which the
elevation of the inner ends of said levers is controlled in carrying out the manu-
facture of the vessel, and sealing the same. Suitable compression springs a—a² are
provided so that the work of the machine will be without unnecessary jars, and the
operative parts are suitably connected together.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a sheet-metal vessel, a body portion terminating in an inner beaded edge,
a dome shaped cover 2 with an annular flange and a marginal portion depressed
below the level of the dome shaped center, and extending beneath the beaded edge,
leaving a slight space between its point of contact with the body portion and said
edge, substantially as described.
2. The hereinbefore described process consisting in first placing a flanged cover
over the end of a vessel having a beaded edge and then pressing down and out-
wardly the top surface of the cover within the margin of the flange beneath the
head of the vessel, substantially as specified.
Dated this 17th day of September 1895.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.