Oct. 25, 1932.
‘ G_ R. JENESON
1,884,708‘
APPARATUS FOR FORMING SHEET METAL CAPS
Filed Sept. '27, 1950
' 3 Sheets-Sheet
INVENTOR
1
Oct. 25, 1932.
G_ R, JENESON
I
1,884,708
APPARATUS FOR FORMING SHEET METAL CAPS
Filed Sept. 27, 1930
/Z/
/09
I5 Sheets-Sheet
2
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'TQ
g’
INVENTOR
0‘?
Patented Oct. 25, ‘1932 '
1,884,708
UNITED STATES‘ PATENT OFFICE
‘ unease a. Jamison, or cmcmuar'r, c1110, assrenon "ro Alumni can
' OI‘ NEW YORK, 11’. Y, A CORPORATION or NEW .rnasmr
COHPANY,
iAPPABATUS FOR FORMING SHEET MET-AI.
Application and September e1, 1830. . serial means“.
The present. invention relates to an ap ‘views of a portion of the
left-hand side of
aratus for forming sheet metal caps and Fig. 1, these views ‘illustratingdi?'erent
po
as particular reference to a self-contained
forming mechanism during the
press. mechanism wherein a series of opera sitions ofthe
stages of formation of the cap;
tions are performed upon the can during its different;v
Fig. 5 is a fragmentary end elevation of
formation.
_
'
cap forming apparatus;
The principal object of the present inven theFig.
6 is a sectional view of a disc of sheet
tion'is the provision of a cap formin mecha
nism' having punch and die mem rs for material from which a cap is formed {and
7 and 8 are sectional views of the
drawing the cap into cup shape and curling ca Figs.
in
different
stages of formation.
or otherwise‘ bending its edge by means of
the present embodiment of the inven
an independent curling die device, all of tionn there
is illustrated a cutting die for
these operations being rformed during one ?rst severing
a disc from a strip of sheet
cycle of movement of t e mechanism.
material. It will ‘bezobvious that this step
16
An important. object of the invention is ' of
cutting ma be eliminated and‘ a
prev1~ .
the provision of a ‘cap-forming mechanism ously formed
‘so blank used in the ?rst'in
which draws an incomplete cap or shell ‘from stance.
'
10
. ?at stock while forming a peripheral edge or
The apparatus disclosed for the purpose of,
started ?ange between shaping members.
illustratm
the invention is embodied in a
An important object of the invention is standard orm
and comprises a die
the provision of alocking device for holding plate 21 (Figs.of1 press
to 4 inclusive) which is 70
the cap, after, being part1ally drawn2 during mounted
on a (press bed or bolster plate 22 .
certain further stages of its formation.
.
in
the
usual
an preferred manner. The die‘
An important object of the invention is
plate
21
sup
orts an annular die ,cutedge 23
the provision of a cap forming mechanism
adapted‘ to sever a disc from a strip of sheet
metal a-nd'to form and completely shape the
securely he cl] in position by a clamping ring
24.
'
~
Mounted concentric with the‘ cutedge 23 is
a die center or anvil consistin of an anvil
operating stroke of the forming mechanism. ring
25 and an inserted pane??ock 26, the
Afurther important object of the inven?
tion is the provision of a cap forming mecha former being embedded in the die plate 21.
cap in a novel and e?icient manner within one
30
a
nism
of the character described having a The
f outer wall of the anvil ring 25 is spaced .
lccking ‘device for’ holding the partially‘ rom the inner wall of the ,cutedge 23 and
a draw ring 27 and a curling die 28 operate
.l’ormed cap during the time its edge is being vertically
this space.
‘
curled, this holding device being adjustable '. The drawwithin
ring 27 rests upon and is sup
in its-time operation relative to the other
ported by‘ an annular member 31 which, in‘
W
turn, rests upon the upper ends of verticalNumerous other objects ofthe invention ly
extending rods 32 projecting from a disc
will be apparent as it is better understood
operations of the mechanism.
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45
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‘from the following description, which, taken Sresting on a drawing rubber 34 which is
in connection with the accompanying draw con?ned between the disc 33 and a lower disc
ings, discloses . a preferred embodiment 35, as illustrated in Fig. 1. The rods 32 ex
tend through vertical bores 36 and 37 formed
thereof.
Referring to the drawings:
"
" res actively in the die plate '21 and'in the
Figure ‘.1. 's a transverse sectional view bedP 22 and these rods have vertical move
taken through a cap‘ forming apparatus em ment therein as will be hereinafter described. as
' A bolt 41 1s threadedly engaged in the die v
bodying the present invention, the view illus plate
21 and extends through an openin
trating the relation of parts prior to opera 42 formed
in the bed 22. The lower end 0
' tion on a strip of sheet material;
the
bolt
extends
through vertical bores 43"
50 ' Figs. 2, 3 and 4 are
enlarged fragmentary and 44 formed centrally
of the discs 33 and
aesavos
35. A vertical opening 45 cut centrally in
the drawing rubber 34 provides clearance for
this bolt 41. An initial compression of the.
drawing rubber 34 is adjustably made by
clamps it against the draw rin 27, forcin it
and the strip downwardly. T e pad63aso .'
engages the strip as the outer cuttlng wall of '
the member 57 cooperates with the inner cut
70
a locknut 46 threadedly engaging the lower ting wall of the member 23 and severs a disc
‘end of the bolt 41, a washer 47 being inter 79 (Fig. 6) from the strip 78.
The members 57 and 27, in their clamping .
posed between the disc 35 and the nut 46.
The cuted e 23 provides an annular cham action on the disc, produce a slip grip which
ber 48 interiorly thereof and this chamber holds the oumr edge of the disc durin the
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75
unites with a depressed annular countersink drawing operation that immediatel fol ows.
This
slip
grip
is
produced
in
part
y
the
re
49 formed in the die plate. It is in these
chambers 48 and 49 that the draw ring 27 sisting actlon of the drawing rubber 34 which
and the annular member 31 move during cer at all times resists the downward movement
the member 27 under the depressing action
tain operations of the mechanism. The parts of
of
the
moving parts 55 and 57. This drawing
of the press just described constitute the die
rubber
resistance is transmitted through the
elements for the apparatus.
I
annular
member 31, its vins 32 and disc 33.
The punch parts of the apparatus are car
ried in the usual manner as by a slide mem
The curling die 28 ( ig. 2) is provided
ber which moves up and down above the die with a tapered shoulder 80 which is engaged
parts. This slide member forms no part of by a similar shoulder 81 formed on the in
of the draw ring 27 and lowering move
the novelty of the present invention and il terior
ment
of the latter forces the curlin die
lustration and further description is, there downwardly
The curling ie 28
fore, omitted. Such a slide, however, carries rests upon thetherewith.
upper
ends
of vvertically ex
a punch member 55, having a usual form
of stem 56.’ This punch member moves up tending ins 82 (Fig. 1) which extend
t e chambers 481and 49 through a
and down above the die parts and carries through
vertical
bore
83 formed in‘ the die plate 21
an annular punch cutedge 57 which moves in
and through a similar bore 84 formed in the
alignment with the draw ring 27.
An annular holding ring or member 61 is bed 22.
The rods 82 at their lower ends are car
99
95
located on the inside of the member 57 and
in a collar 85 which is slotted at 86 to
‘has sliding vertical movement therein. This ried
ring is counter-bored at 62 to provide slid provide clearance for the rods 32,'the collar
up and down with the curling die.
ing clearance for a combined knockout and moving
The
collar
has sliding movement on the
forming pad 63 carried on the lower end of bolt41 and85extends
downwardly in a hub
a knockout rod 64 extending upwardly section 87 in which is cut
a peripheral groove
through the punch member 55 and through 88. A roller 89 loosely mounted
on a pin 91
its stem 56, as illustrated in Fig. 1.
100
The stem 56 is counter-bored at 65 and a carried by one arm of a lever 92 operates
the groove 88.
spring 66 extends therein, encircling the within
The
lever
92 rocks on a shaft 93 carried in
upper end of the rod 64, the spring'being
105
94 projecting downwardly from
con?ned between the stem and locknuts 67 athebracket
bed
22.
The opposite end of the lever
which threadedly engage the upper end of
the rod 64. A lower face 68 of the pad 63 92 carries a pin 95 on which is rotatably
is formed according to the panel con?gura mounted a roller 96 operating in a cam groove 110
45 tion desired in the ?nisheddrawn cap and 97 formed in the face of a cam 98 which is
this surface cooperates with a similarly carried by a shaft 99. Rotation of the shaft
99 is in 'sy'nchronism with the raising and ’
formed face 69 of the panel block 26.
of the punch member 55 and the
The member 57 is slotted on opposite sides lowering
cam
98
carried
by the shaft thus controls
at 71 and a plate 72 (Figs. 1, 3 and 5)- ex
115
tends diametrically across the member and rocking of the lever 92 and through the de
scribed connections raises and lowers _ the
projects outwardly on both sides thereof. curling die 28. It will be understood that
This plate 72 carries the holding ring 61 to this
98 cooperates'with the movement
which it is secured and controls its posi of thecam
draw
ring 27 when the latter is being
tion during certainsteps in the cap forming depressed and
when the shouiders 80 and 81
operation, as will be hereinafter'described.
are
locked
together.
A lower surface 75 of the ring 61 is pro?led By the time the punch member 55 and' the '
or shaped to ?t the upper edge of the shell
carried thereby, have reached the end
being drawn and this e ge corresponds with parts
of their downward travel, the disc 79 has
agigisilarly formed upper edge 76 of the an been drawn on into a shell 101, (Figs. 2 and
‘ The punch ‘member 55 and parts carried 7). In producing this shape, cooperation of
\ thereby are ?rst lowered for the cutting and the members 26 and 63 have formed the cen
panel a, the holding member 61 and the
cap forming operations and in this lowering tral
action the member 57 comes down on to the edge 76- of the anvil 25 have coo rated to
strip designated by the numeral 78 (and
form the upper curved ridge 6 o the shell
130
.
1,884,708
3
and an outer. peripheral wall 0 of the shell
has been drawn over the anvil 25 and inside member 57, this follovn'ng movement being
effected by the drawing rubber 34. The
of the member 57. .'
shoulder
81 moves away from the shoulder
The two members 57 and 27 provide the
5 proper slip grip throughout this drawing 82, the annular member 31 moving upward‘
ly into engagement with the lower edge of
action and prevent formation of wrinkles.
' An_ edge (i of the shell is not drawn off but the curling die 28.
The parts are now in position for the curl~ 7
is left projecting at a slight angle to wall 0
and is shaped between a convex edge 102 ing operation which takes place as the punch
' 10 formed on the member 57 and a cooperating member 55 continues its upward movement
and until the parts. are brought into the posi
concave groove 103 formed on the upper edge
tion illustrated in Fig. 4. During such move
of the curling die 28.
During the last part of the forward or ment the holding member 61 prevents any
upward movement of the drawn shell 101.
15 downward stroke of the punch member 55, ' The drawing rubber 34, acting through
certain devices operate to lock the plate 72 the annular member 31, causes the draw ring
in its lowermost position. These devices
comprise a pair of blocks 105 (Fig. 1) in~ 27 to follow the rising punch member. Si
serted in slots 106 cut in opposite faces of multaneously the cam 98 rocks the lever 92
V the punch member 55, each block being held and lifts the curling die 28 in unison there
in its slot by a screw 107. Each block pro; with. The edge d, resting against the rising
jects outwardly beyond the outer wall of curling die, is thus bent or curled outward
the punch member 55 and carries a screw~108 l3’ and into an annular groove 125 formed
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. threadedly secured therein, ‘the screw having on the inside wall adjacent the upper face
a squared head 109 adapted for engagement of the draw ring 27. This wall forms a. con
with
i
tinuation of the concaveupper die surface of
a. wrench or other tool for the purpose
the curling die 28 and completes the curling
of adjustment.
Near the end of the downward movement action on the edge of the shell forcing it up
of the member 55, the lower end of the screw ward and inward, thus producing an annu
a
’
108 engages a projection 111 of a latch mem lar curled edge e (Figs._4_,.and 8). ‘
During such upward- movement of the
her 112 which is pivoted on a pin 113 carried.
in spaced lugs 114 formed in a stationary
frame 115. This. frame 115 is preferably a
part of the press frame. The latch 112 is
thereupon‘ rotated on its pivot into the posi
- tion illustrated in Fig. 2 wherein ashoulder
V 116 formed in the ‘latch engages the outer
end of the plate 72. Thelatch member 112
in this position rests along side a projection
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117 of the block 105.
a
Each latch 112 carries a bolt 118 threadedly
secured thereto and locked in place by a nut
119. A roller 121 is rotatably mounted on
the bolt 118 and, therefore, moves with the
latch member. An upper inclined cam sur
as face 122 is formed on the upper edge of the
‘ rojection 117 for a purpose which will now
‘ e described.
60
"
,
punch member 55, the‘t-apered cam surfaces
122 of the blocks 105 engage their respective
rollers 121 and swing the upper ends of the
latch members 112 outwardly on their pivots
113 and into the position illustrated in Fig. 11
as the end of the curling operation takes
place. The shoulder 116 of each latch 112 100
frees the end of the latched bar 72 and the
remaining upward movement of the punch
member 55 takes place without interference
with these latch members.
. During the ?nal upward movement of the
punch parts, the bottom edges of the slots 71
of the punch members 57 pick up the bar 72
and carry its holding member 61 upwardly,
releasing the shell. The draw ring 27 at such 110
'time continues upwardly under the continued
Beginning from the position assumed by action of the drawing rubber 311. The shell
the parts at the lowermost end of travel of 10], being also'released from the holding ac
tion of the knockout pad 03, moves upward
the punch member 55 and the parts carried ly,.the‘
ring 27 acting as a knockout 31 $1
thereby (gig. 2), consideration should be member draw
for
the
shell.
given to “ ig. 3 which illustrates the parts
The
drawn
shell
is thus stripped from the
alter the first upward movement. The plate
anvil ring 25 and moves upwardly inside
'72, it will be observed, is held by the latch of
the punch member 5'4". its the punch mem
members 112 and this retains the holding
55 approaches the end of its upward so
member 61 in lowered position on the drawn leer
stroke,
the upper end of the knockout- rod
shell 101 holding the shell on the anvil25.
64
(Fig.
'1) is engaged by any suitable pro~
During this initial upward movementlhe jecting member
127 associated. with the press
punch member
moves away from the up frame in any. suitable
manner. This mo~
per surface of the plate 72 and the member 57 mentarily stops the upward
movement of the M5
carries its rounded edge 102 away from the knockout rod 04 and the knockout
pad 03
extending edge d of the shell 101. The curl
‘while the’punch parts
till
55 and 5”." continue np~
ing die 28 remains in its lowermost position, wardly to the end of their
travel. This strij'is
the draw ring 27 moving upwardly and re the
drawn shell from the punch member 5?
maining in contact with the lifting punch and allows it to fall out of the machine.
1,884,708
tties, a curling die se arate from the lower
It is thought‘ that the invention and many gripping instrumenta ity and located within
of its attendant advantages will be under one of said instrumentalities and in align
stood‘ from the foregoing description, and ment with the said .projectin cap edge, means
it will be apparent that various changes may for actuating said curlin me‘ while the said
be made in the form,'construction and ar¢ cap is held on said anv-i and shaping said
rangement of the parts without departing projecting .edge into an annular curl, an
from the spirit and scope of the invention or means operating through said locking de
sacri?cing all of its material advantages, the
for releasing said holdinglmember from
form hereinbefore described being merely a vices
cap holding position during t e ?nal return
10 preferred embodiment thereof.
I claim:
.
movement 0
_
said instrumentalities.
70
_
4. In a cap formingapparatus, the combi
1. In a cap forming apparatus, the com nation of a pair of opposed, substantially
bination of a pair of opposed, substantially concentric instrumentalities having a for
concentric ,instrumentalities having a for, ward and a return movement and clamping
ward and a return movement and clamping a a strip of sheet material positioned therebe
disc positioned therebetween in a slip grip, tween in a slip grip, a die cooperating with
15
an anvil coactive with said instrumentalities said instrumentalitzes and cutting a disc from
durin their forward movement for drawing said
strip, an anvil coactive with said instru
said isc from between~ the slip grip of said mentalities
during their forward movement
instrumentalities and into one of them there for drawing said disc from between the slip
by shaping the disc into a cap having its edge grip of said instrumentalities and into one
. left projecting, a curling die located within of them thereby shaping the disc into a cap
one of said instrumentalities and in align having its edge left projecting, a curling die
ment with the said projectin cap edge, and located within one of said ins'trumentalit-ies at
means for actuating saidcur ing die during and in alignment with the said projecting cap
the return movement of said instrumentali edge, and means for actuating said curling
ties and shapinor said projecting edge into an die during the return movement of said in
annular curl thereby producing a ?nished.
25
cap.
strumentalities and shaping said projecting
2. In a cap forming apparatus, the combi edge into an annular curl thereby producing
cap.
'
nation of a pair of opposed substantiallyv a ?nished
5. In a cap forming ap aratus, the combi
concentric instrumentalities having a for nation
of a pair of oppose , substantially con
ward and a return movement and clamping a
centric‘
instrumentalities having a forward
disc positioned therebetween in a slip grip, and areturn
movement and clamping a disc
100
an anvil coactive with said instrumentalities positioned therebetween in a slip grip, an
durin their forward movement for drawing
85
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£5
coactive with said instrumentalities
said isc from between the slip grip of said anvil
during
their forward movement for drawing
instrumentalities‘and into one of them there said disc
from between the slip grip’ of said
by shaping the disc into a cap having its edge instrumentalities
into one of them there
loft projecting, a holding member cooperat by shaping the discand
into
a cap having its edge
ing with said anvil for holding said cap there left projecting, a holding
member cooperat
on during the initial return movement of said
ing
with
said
anvil
for
holding
cap there
instrumentalities, a curling die separate from on, looking devices for lockingsaid
said'holding
the lower gripping instrumentality and ‘lo
cated within one of said instrumentalities member in cap holding position during the
and in aligment with the said projecting cap initial return movement of said instrumen
edge, and means ‘for actuating said curling die talities, a curling die located within one of
while the said- cap is held on said anvil and said instrumentalities and in alignment with
said projecting cap edge, means for actu
shaping said projecting edge into an annular the
ating said curling die while the said cap is
101
curl thereby producing a ?nished cap.
3. In a cap forming apparatus, the combi held on said anvil and shaping said project
nation of a pair of opposed, substantially con ing edge into an annular curl, means operat- _
centric instrumentalities having a forward ing through said locking devices for releasing
and a return movement and clamping a disc said holding member from cap holding posi
tion during the ?nal return movement of said
55 positioned therebetween in a slip grip, an an instrumentalities, and adjusting means for
vil coactive with said instrumentalities dur
ing their forward movement‘for drawing said altering the time of operation of said releas
disc from between the slip grip of said in ing means.
6. In a cap forming apparatus, the combi
strumentalities and into one of them thereby
nation of a pair of opposed, substantially con
shaping
the
disc
into
a
cap
having
its
edge
60
left projecting, a holding member'cooperat centric instrumentalities for clamping a disc
therebetween in a slip grip, an
ing with said anvil for holding said cap there ‘positioned
anvil and a curling die separate from the low
60
65
on, looking devices for locking said holding er' gripping instrumentality and located in
member in cap holding position during the one of said instrumentalities, actuating
initial return movement of said instrumental
12L
1,884,708
means for moving one of said instrumentali
ties and drawing sald disc over said anvil into
'cap form with a projecting ed e clamped
and shaped between said curling die and said‘
instrumentality, and‘ means for actuating
said curling die to reshape said pro]ect1ng
edge into annular curled form.
~
In a cap forming apparatus, the comhi-.
nation of a pair of opposed, substantially
concentric instrumentalities for clamping a
disc positioned therebetween in a slip grip
an anvil and a curling die located in one 0
said instrumentalities, actuating means for
moving the other of said instrumentalities
15
and drawing said disclfrom its slip rip and
over said anvil into cap form, means or actu
ating said curling die operable separately
from the lower gripping instrumentality to
reshape the edge of'said drawn cap into annu
lar curled form, and devices preventing re
turn of a part of said last mentioned instru
mentality while holding said cap on said an
vil during its edge curling operation.
8. In a cap forming ap aratus, the combi
25
nation of a pair of oppose , substantially 0011-.
centric instrumentalities having a forward
and a return movement and clamping a disc
positioned therebetween in a slip grip, an
anvil coactive with said instrumentalities
30
during their forward movement for drawing
said disc from said slip 'gri thereby shaping
35
the disc into a cap, means For actuating said
curling die during the return movement of a
part of said instrumentalities and thereby
curling the edge of said disc, and means for
holdino' other parts of said instrumentalities
in ?xed position and“ said cap on said anvil
during said edge curling operation.
_
GEORGE R. ‘JENESON.
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