Improvements in Machines used in Heading or Fixing the Covers on Sheet Metal Drums, Pails, or other Vessels.
Year: 1895

page_text: Date of Application; 17th Sept., 1895-Accepted, 23rd Nov., 1895
[Communicated from abroad' by FREDERICK' EDWARD HEINIG, Manufacturer,
of 228 8th Street, Louisville, Kentucky; U.S.A.]
Improvements in Machines used in Heading or Fixing the Covers
on Sheet Metal Drums, Pails, or other Vessels.
I, WILLIAM HUMPHREY WHEATLEY of the Firm of Wheatley & Mackenzie
Engineers and Patent 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 working machines and particularly to that
class of machines used in heading sheet-metal pails etc. and is hereinafter more
fully described and specifically pointed out in the claims.
In the annexed drawings
Figure 1 is an elevation of the machine, with a sheet metal pail supported in
position on the carrying bracket at the left as the parts are in position for
performing their functions in securing the cover of the said pail in position;
Figure 2 is an enlarged detail view of the devices used in closing the vessel
and
Figure 3 is a separate plan view of the roller carrying yoke E and'
Figure 4 is a detached view showing parts in their extreme position.
The object sought to be accomplished is to securely fasten the cover of the vessel
in position so that it can not be accidentally removed when once placed in the
desired position.
In the drawings A is the standard of the machine; B is the supporting bracket
for the work; C are the driving pulleys; C is the vertical driving shaft; Cis
the foot treadle for bringing the parts into operative position; D is the main
supporting spindle for the heading devices, E is a roller carrying yoke carrying
the two pressure rolls E¹ at its end. F is the clamping collar adapted to securely
hold the downwardly extending flange 4 of the cover 2 in form and position. Gis
a spring held step adapted to serve as a bearing plate to press on the upper face of
the top and hold it down cooperating with a clamping collar F; H H are forming
rolls rounded on their peripheral faces and are used to bend the sheet metal top
into position and compress the metal thereof under the inturned circumferential
bead 5 which may cousist of a wire inclosed within the inturned portion of the
metal or it may be merely an intruding bead, at the will of the manufacturer,
though the inclosed wire is preferred as it forms a much stronger head.
downwardly projecting ears to which one end of the levers H' are securely pivoted
while the inner ends of said levers H' are loosely held in open sockets k in the
thrust block K.
e e are
a is an expansion spring bearing on the yoke E, to hold it and its connected
parts yieldingly in their operative position.
a² is a similar spring, bearing on the upper end of the shank g of the step G so
as to make it more or less yielding, while the pin 6 entering said shank through
the slot prevents the same from dropping out when the working parts are raised
from their duty.
In practice a shoulder c is provided on the inner face of the clamping collar F so
as to prevent angularity in the bend of the metal at that point, the under sides of

page_text: said clamping collar being formed substantially in the arc of a circle struck from
the center of the head 5 of the vessel. The vessel 1 is preferably provided with
the bead 3 which serves as a stop for the down turned flange 4 of the cover 2.
The operation of the machine is as follows. The sheet metal vessel 1 with its
top 2 provided with down-turned flange 4 is placed upon the bracket B with the
clamping.collar F in position as shown in the drawings.
F
The treadle C is depressed so as to bring the spindle D with its suspended
connections down, the step G resting on the upper face of the top 2. Continuing
the pressure the rolls E' are made to bear upon the upper side of the clamping
collar so as to hold it in position. Additional pressure upon the treadle C" will
cause the spindle D to descend carrying with it the thrust block K. The position
of the yoke in Fig. 2 brings the forming rollers H into close contact with the metal
of the covers and, as the spindle D moves down, the inner end of the lever H¹ is
carried down by the thrust block K until finally the forming rollers H are made to
assume the position shown in Figure 4.
In the meantime the spindle D and its dependent connections are made to
revolve more or less rapidly, causing the rollers E¹ to travel around on the upper
side of the collar F and to carry with them, through the ears e'e depending from
the yoke E, the forming rollers H which continue to bear upon and form the metal
of the top down and under the bead of the pail there sealing the same securely in
position as is more clearly illustrated in Figure 4 of the drawings in which the
parts are at their extreme position ready to be extracted upon releasing the
pressure upon the post treadle C".
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 machine for the described purpose, a base step a carrying spindle, a
thrust block connected thereto, a roller carrying yoke, pressure levers pivotally
connected to said yoke at one end and to thrust block at the other end and forming
rollers on said levers all combined substantially as specified.
2. In a machine for the described purpose, a support for the work, a collar for
clamping the cover flange, a yoke, a thrust block above the position of the work,
levers connected at one end to said yoke and adapted to be carried at the opposite
end in said thrust block, and forming rollers on said levers all combined sub-
stantially as specified.
3. In a machine for the described purpose, a support for the work, a clamping
collar above the same, a pair of pressure rolls, a carrying yoke for said rolls a pair
of forming rolls a pair of pivoted levers carrying said forming rolls, and a thrust
block carrying the inner ends of said levers, substantially as specified.
Dated this 17th day of September 1895.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.