Improvements in Stamping Presses, and in Dies and Feed-mechanism therefor.....
Year: 1899

page_text: Date of Application; 3rd Mar., 1899-Accepted, 24th June, 1899. .
[Communicated from abroad by JAMES LOUIS BOARD, of Chicago, Illinois, United
States of America, Manufacturer.].
Improvements in Stamping Presses, and in Dies and Feed-mechanism
therefor.....
I, DAVID YOUNG, Patent Agent, of the Firm of D. Young & Co., of 11 and 12,
Southampton Buildings, London, W.C., do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
My invention has for its object the production of a press for stamping out the
tops and bottoms of cans or other sheet metal vessels and consists of a combination
of devices and appliances hereinafter described. and claimed.
In the drawings,
Figure 1, is a. perspective view of my press.
Figure 2, is a side elevation showing the opposite side from that. shown in
Figure 1..
Figure 3, is a horizontal section on the line 3-3 of Figure 2.
Figure 4, is an elevation showing the female dies and the shovel for picking up
the parts.after they have been stamped.
Figure 5, is. a plan view of the sheet feeding, mechanism.
Figure 6, is a sectional view on the line 6-6 of Figure 5.
Figure 7, is a sectional view on the line 77 of Figure 5.
Figure 8, is a sectional view of a set of male and female dies used for stamping
out the bottoms of cans...
Figure 9, is. a sectional view of a set of male and female dies for stamping out
the tops of. cans.
Figure 10, is a vertical section of the press on the line 10-10 of Figure 1.
In carrying out my invention A represents a suitable frame work on which the
operating parts of the machine are supported. B, is the main driving or crank
shaft provided with balance wheel B and driven from any suitable source of
power. The shaft B is provided with the usual crank and C is the usual pitman
connecting the crank with the reciprocating head carrying the male dies. (The
construction in this respect is no different from the well known form of press in
which the dies are operated by a crank shaft.) This head is shown at E,
(Figure 10). On the frame of the machine, is supported a bar E (Figures. 1
and 10) carrying adjustable pins E. Carried by the head E are bars E³ (Figs. 1
and 10) movable with respect to the head. Each of the male dies is provided with
a pin (Figs. 8.and 9) and as the head-comes upward, the bars 3 strike the
pins E and thus eject the blank from the male die as hereinafter explained. The
construction thus far explained, is now in use in many forms of presses and need
not be further described. Also the forms of the cutting dies except in some
particulars hereinafter mentioned, are of the usual well known style. The male
die 'for instance, as shown in Figure 8, comprises the head E, supporting the
ring and a fitting. E screwed into said ring and held in place by the lock nut or

page_text: -
ring E.
A ring Es, is screwed on to the exterior of this fitting E, and has a pro-
jecting flange E. This flange engages a corresponding flange E on the punch
proper E. The fitting E, is bored to receive the plunger or pin E, as shown and
the plunger is provided with a flange E, adapted to limit the upward movement
of the plunger. A spring E13 tends to keep the plunger always in its upper position,
said spring encircling the plunger, and one end bearing on the end of the
plunger, while the other end bears upon the fitting. On the lower end of the
plunger is a plate E, constituting what is technically known as a "flipper." Its
function is to discharge the blank after it has been cut out. As before explained,
when the head of the machine recedes or moves upward, the plunger E, is struck,
which causes it to move with respect to the fitting E, and punch proper E" and
plate E15, striking the blank, forces it out of the punch E. The construction
of the corresponding female die shown in the lower part of Figure 8, is as follows;
There is a stationary plate or head F with a centre block carrying a stem F2 and
with a filling plate 3. Surrounding the centre block F is the cutting die F
Between these, the drawing ring, 13, is held as shown. F6, is a plate surrounding
the stem F2 and held normally against the head by the spring F, one end of the
latter bearing on the stationary piece F8, while the other end bears on the plate F³,
As will been seen, the drawing ring F, is held between the rings F-F, but free
to move vertically. Pins F9 extend from the ring to the plate F". It will thus
be seen that pressure on the ring F will through the pins F be transmitted to the
plate F and the latter will yield against the spring F. A bolt F10 holds cutting
die in place. The above described male and female dies shown in Figure 8, are
for use in stamping out blanks for the bottoms of the vessels. In Figure 9, I
have shown those for use in stamping out the top of the vessel where an additional
orifice must be made in the blank. In this case, the fitting E, is provided in the
centre with a male die E and the plunger E, instead of extending through the
fitting is provided with a plate E" and the latter is connected with the flipper Es
by the pins E. In the female die, the centre block F1 is provided with an
orifice and the other cutting ring F is provided, the structure in other respects
being similar to the other female die.
Referring to Figures 8 and 9, it will be observed that the punch E", has its
interior face at the end, cut away as at E2, and for a considerable distance up from
the end. That is to say, the recess is carried up beyond the lower face of the
Hipper E18 when the latter is in its upper or normal position. The purpose of this
recess is twofold.
First, the provision of the cut-away portion or recess leaves the lower end of the
punch the requisite thickness to properly form the blank while it leaves the body
of the punch, thick enough to give the requisite strength and this thin lower end
of the punch as just described, also enables the punch to be easily dressed.
Second, the provision of this recess E, extending up above the surface of the
flipper, leaves a space between the punch and the edge of the flipper in which the
bead on the blank can form and with plenty of space above to take care of any
foreign substance that may be on the tin.
By this construction of punch and by engaging the punch to the fitting E" as
above explained, the parts can be easily taken apart for the purpose of dressing the
punch and can also be easily and cheaply manufactured in the original instance.
I will now describe more fully the construction of the press and my improvements
thereon. Carried by the main frame of the machine and held at an angle of about
45 degrees more or less, is a table G (Figure 10). This table constitutes the feed
table. Located on the reciprocating head, E which carries the male dies, is an
adjustable socket G¹ carrying a pin G2. H (Figs. 4, 5, 6 and 7) are strips held in
place by suitable strips H¹; said strips H, constituting slides which carry the feed
mechanism. Engaged to each strip, a lug H2, (Figs. 2 and 10). H³, is a link
connected with the lug H2 and connected also with the arm H, fixed on the
shaft H. Fixed on said shaft is also the arm H. Pivoted to the end of the
arm H6, is a rod H7, (Figs. 1, 2 and 10). This rod H7, extends up to the shaft B

page_text: where it is forked to embrace the shaft and is provided with a roller which travels
in the cam groove, H8, in the cam wheel H, the latter being fixed to the shaft B.
Thus a revolution of the latter causes the rod H7, to reciprocate and this through
the mechanism just described, causes the strips H to reciprocate. A counter-
weight Ho is provided to balance the parts. Fixed to and carried by the strips H,
is a sheet feeding mechanism which I will now describe. J, (Figures 6 and 7)
are bearings engaged to the strip H and carrying a shaft J. On each end of this
shaft, are arms J2. On the end of each arm J2, is an elongated bearing J3, the
said bearing being split to receive the screws J, the latter are pointed on the
ends as shown in Figure 7, and are held in place by suitable clamping screws.
On each shaft is an arm J, provided on its end with a roller J10.
Un each arm
is also located one or more screws J, the lower ends terminating in sockets J12,
engaged to the strip H. In each socket, below the end of the screw J, is a
spring J. It will be at once seen, that a depression of the roller J10 will tilt the
arms J and raise the screws J and as soon as the pressure is removed from the
roller Jo, the spring J13 will return the screws J to their normal position.
K, is a. rod provided on its lower end with a foot K³, the latter being located
adjacent to and above the roller J10 (Figure 2). The rod K extends up to the
counter shaft M where it is forked to embrace the shaft and the rod is provided with
a roller K2, which travels in the cam groove K3 (shown in dotted lines Figure 2)
on the cam wheel K. The counter shaft M is driven by the gear M¹ meshing
with the gear M on the shaft B. Through the medium of the cam groove K³, the
rod K, is thus given a vertically reciprocating motion. There is of course, a rod K",
for each side of the machine, the foot on one rod extending in the opposite direction
from the foot on the other side as shown by dotted lines Figure 2, and when each
foot K' is depressed, it presses upon the roller J10, and tilts the screws J* upward.
In the cam wheel K4, is another cam groove K. Pivoted to the arms M³, which are
engaged to the main frame of the machine (and these arms also support the counter
shaft M) is a rod M. Pivoted on this arm M, is the arm or rod N. This rod is
provided with a roller N¹ which travels in the cam groove K³, so that the lower end
of the rod N has a reciprocating motion along the bed of the machine. There is
of course, one of the arms N for each side of the machine. Pivoted to the lower
ends of these rods, is what I will term, a shovel O. This shovel is also shown in
Figures 4 and 10. It travels in suitable ways immediately above the bed G and
when in its inner or upper position, it is located between the male and female
dies. Its purpose is to catch the blanks after they are ejected from the male dies
and carry them out of the way. It will be observed by reference to Figure 3, that
the elongated bearings J3, are alternately disposed so that they will engage and
feed more than one sheet of tin and will also engage a single sheet at more than
one point.
I will now describe the operation of the mechanism. The operator places a
sheet of metal in the table G (Figures 2 and 10) and carries it down until it strikes
the pin G2. The mechanism is so timed that as the male dies and pin G2, recede,
the feeding strips H have been carried forward so that the first of the feeding
pins (we will say J, Figure 3) is directly above the edge of the strip, the foot Ki
meantime keeping the screws tilted away from the sheet, As the male dies recede,
the rod K, lifts the foot K' and allows the feeding screws to drop down and engage
the sheet and at the same time the rod H7, operates to carry the feeding strips
down or out, thus moving the sheet which has been inserted, down under the dies.
Simultaneously with the above movement, the rods N, have moved the shovel.0,
up to a point underneath the male dies as shown in Figure 10, and shown also by
dotted lines, Figure 3, and as soon as the dies have reached their upper position
and the blanks ejected, as herein before described, they drop onto the shovel and
when the dies start down again, the shovel is drawn out of the way by the rods N
and the blanks thus carried away. As soon as the sheet which has originally
been inserted, is struck by the dies and the punching accomplished, the feeding
pins are lifted by the foot K¹ and a reciprocation upward or inward of the strips H,

page_text: carries the pins up, so that those marked J15 and J16 (Figure 3), grasp the sheet,
while. those marked J", (Figure 3) grasp the sheet, which had therefore been
employed and force it out of the machine. The operation of the parts is so timed
that the feeding pins hold the sheet in place until the punches have passed through
the sheet sufficiently to hold it in place; thereupon the feeding pins leave the
sheet, move upward to get a new hold, engage the sheet and hold it while the
punches recede from the sheet as soon as the punches have left the sheet, the
feeding pins again move down with the sheet, and hold the latter while the punches
again enter the sheet...It is of course understood that some form of stripping
mechanism for stripping the sheet off the punches after the blanks have been cut
out, is employed, but as this is an old feature in presses of this nature, I have not
shown and will not further describe it.
I will now call attention to the peculiar arrangement of dies as shown in Figure 3.
They are arranged in pairs and each pair as for instance. P, alternates with the
adjacent pair, as for instance P¹. Now as the operator feeds in a sheet, the first
operation, is to stamp out the blanks by means of dies P¹ and this will leave
untouched a space in the sheet equal to a distance between the dies P¹.
dics recede and the sheet is fed forward, the dies P', cut out a blank from this unused
space in the first stamping while the dies. P also cut out a blank each. The
operation thus goes on until the entire sheet is consumed and all of the metal in
the sheet is utilized.
As the
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is-
1. In a press, the combination, with two or more dies, of mechanism for auto-
imatically feeding the sheet of metal past said dies, substantially as described.
2. In a press, the combination, with two or more dies adapted to simultaneously
operate on a sheet of metal, of mechanism for feeding said sheet past said dies,
substantially as described.
3. In a press, the combination; with two or more vertically-reciprocating cutting
dies adapted to simultaneously operate on a sheet of metal, of mechanism for
feeding said sheet past said dies, substantially as described.
4. The combination, with a cutting die, of a shovel and mechanism to auto-
matically insert the same between the male and female portions of said die as the
portions recede from each other, substantially as described.
5. The combination, with vertically-reciprocating cutting dies, of a shovel and
mechanism to automatically insert the same between the male and female portions
of said dies as the portions recede from each other, substantially as described.
6. In a press, the combination, with the cutting die or dies and a table along
which the sheet is fed, of reciprocating feeding-pins adapted to engage the edge
of the sheet and carry it under the dies, substantially as described.
7. In a press, the combination, with the cutting die or dies and a table along
which the sheet is fed, of reciprocating feeding-pins arranged to engage the sheet
before it reaches the die and to carry it beyond the die, substantially as described.
8. In a press, the combination, with the cutting die or 'dies and a table. along
which the sheet is fed; of feeding-mechanism adapted to move said sheet along the
table, said feeding-mechanism on the two edges of the sheet being out of alignment
with each other, substantially as described.
9. In a press, the combination. with the cutting die or dies and a table along
which the sheet is. fed, of a set of sheet-feeding mechanism on each edge of the
sheet, each set being out of alignment with the corresponding set on the opposite
edge, substantially as described:
10. In a press, the combination, with the cutting die or dies and a table along
which the sheet is fed, of sheet-feeding: mechanism on each side of the sheet, each
set consisting of two pins mounted on a common, tilting bar, said bar adapted to

page_text: move longitudinally along the table and to tilt the pins vertically to and from the
sheet, substantially as described.
11. In a press, the combination, with the cutting die or dies and a table along
which the sheet is fed, of a set of sheet-feeding mechanism on each edge of the
sheet, each set consisting of two pins adapted to engage the sheet, the pins in one
set being out of alignment with the pins in the set of the opposite edge of the
sheet, substantially as described.
12. In a sheet-feeding mechanism consisting of a feeding-strip and mechanism
for moving the same longitudinally along the feeding-table, a bar mounted on said
strip, one or more feeding-pins mounted on an arm extending from said bar, a
roller mounted on an arm extending from said bar in the opposite direction and
mechanism adapted to bear on said roller and thereby tilt the feeding-pins, sub-
stantially as described.
13. In a press, the feeding-mechanism consisting of a feeding-strip and mechan-
ism for moving it longitudinally, a bar pivoted thereon, provided with at least
two arms extending from said bar, to a point over the table, each bar provided with
a feeding-pin adapted to engage the sheet, another arm extending from the bar
in the opposite direction and means for tilting the latter bar and thus tilt the pins
away from the sheet, substantially as described.
14. In a cutting die, the metal punch having its inner face recessed for a diş-
tance up from the end, substantially as described.
15. In a cutting die, the metal punch having its inner face cut away a distance
up from the end of the flipper plate, said recess extending up beyond the lower
face of the flipper, substantially as described.
16. In a cutting die, the metal punch having its upper end flanged and held by
a flanged ring in engagement with the main portion of the die, substantially as
described.
tay or arch
17.
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.