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Sept 10, 1946-
1.. v<2. ZESBAUGH
‘
_ 2,407,465
.METHOD AND APPARATUS FOR MAKING CAPS 0R COVERS
Filed July 8, 1942
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Sept. EQ, 1946.
L. G. zEsBAUGH
:METHOD AND APPARATUS FOR MAKING CAPS 0R COVERS
Filed July 8, 1942
2,407,465
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Sept 1% 1946.
1.. <5. ZESBAUGH
METHOD AND APPARATUS FOR MAKING CAPS OR COVERS
Filed July 8, 1942
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2,407,465
3 Sheets-Sheet 5
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Inventor
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Patented Sept. 10, 1946
2,402,455
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2,407,465
METHOD AND APPARATUS FOR MAKING
CAPS on COVERS
Lawrence G. Zesbaugh, Minneapolis, Minn, as
signor, by mesne assignments, to Perma-Seal
Closure 00., a‘ corporation of St. Paul, Minn.
1
Application July 8, 1942, Serial No. 450,140‘
7 Claims. (CI. 93-13)
2
This invention relates to a method and appa- ~--'
Fig. 8 is a central vertical section through the
ratus for making a cap or cover for a‘ container,
dies shown in Fig. 6 in a different arrangement
and particularly for making a cap or cover for a
and in closed position;
cylindrical container such as a milk bottle.
Fig. 9 is a horizontal section taken on line 9—9
It is desirable in a cap for such a container to
of Fig. 8;
‘
a
have one that is suf?cientiy rigid‘so that it can >
Fig. 10 is a bottom plan View of the ?nished
be handled and placed on the container without
cap;
being distorted and one that will ?t the contain
er tightly and form a tight closure therefor.
Fig. 11 is a central vertical section through the
cap showing the same on a container which is
It is also desirable to have a cap or cover
shown in dotted lines; and
which ?ts along both the inner and outer side 1.0 Fig. 12 is a horizontal section illustrating a die
of the container.
, and blank carrying turret.
It is an object of- this invention therefore, to
Referring to the drawings an apparatus is
provide a method and apparatus for making a
shown for carrying out the method of the inven
cap which is strong and which makes a tight ?t 15 tion comprising a female die l5 carried on a
on the container.
plunger !5a and having a cylindrical recess l5b
It is a further object of the invention to pro
at its underside. Die i5 cooperates with another
vide a method and apparatus for making a cap
die it having a shallow cylindrical recess lBa in
or cover from a sheet of paper-like material in
its top surface. Die I 6 has a depending cylindri
Which the sheet is bent and formed as desired 20 cal portion I61) ?tting in openings Ila of a sta
Without undue strain or tearing of the material.
tionary frame member ll. Rim l?b carries and
It is another object of the invention to pro
is supported by a plurality of pins l8 illustrated
vide a method and apparatus for making a cap or
as three in number, which extend downward
cover of paper~like sheet material,’ which cap or
through the openings Na and are supported up
cover will ?t closely on the inner and outer sides 25 on a plate [9. Plate H! has a central hub i911
of the container.
receivable in and substantially ?tting within the
It is more speci?cally an object of the inven
inner side of a compression coiled spring 20 sup
tion to provide a method and apparatus for mak
ported at its lower end upon a plate or collar 2!.
ing a cap or cover from a sheet of paper-like ma
Collar 2| has a central hub 2Ia ?tting within
terial adapted to ?t a substantially cylindrical 30 spring 20. A nut 22 engages the lower side of
container, which cap or cover ?ts closely on the »
plate 2! and can be'adjusted to vary the tension
inner and outer sides of the container top and
of spring 20. Nut_22 is threaded upon the lower
which is strengthened by a bead or ridge formed
threaded end of a plunger 23a secured to a male
about the top thereof.
die 23 having an upper cylindrical portion of a
These and other objects and advantages of the
diameter to be received in recess I52) and of
invention will be fully set forth in the following
slightly smaller diameter than said recess. Die
description made in connection with the accom
23 ?ts within a cylindrical recess in memberv l6
panying drawings in which like reference char
and has a‘ reduced portion 23b extending through
acters refer to similar parts throughout the sev
and below member l6 and resting on frame
eral views and in which:
Fig. 1 is a vertical central section through cer
tain dies which are ?rst used;
Fig. 2 is a partial view similar to Fig. 1 shown
on an enlarged scale and showing the dies in a
di?erent position;
Fig. 3 is a horizontal section taken on line 3--3
of Fig. 1 as indicated by the arrows;
Fig. 4 is a plan view of the blank used;
Fig. 5 is a plan view of the blank after having
the ?rst operation performed thereon;
40 member H.‘ A further reduced portion 230 ?ts
in and may be secured in frame member _|‘!.
Plunger 23a depends from portion 230, having a
reduced portion threaded thereinto. It will thus
be seen that male die 23 is stationary. The re
45 cess IBaV is adapted to have placed therein a flat
circular blank 24 from which the cap or cover is
made. The ?rst step of the method is carried out
in the dies shown in Figs. 1 to 3.
_
In Fig. 6 an upper die assembly is shown com
prising an annular member 21 having a lower
. annular portion 21a of reduced thickness. Mem
Fig. 6 is a vertical section through certain dies
used; the same being shown in open position with
her 2? is internally threaded and a plunger mem
the object to be operated on therein;
ber 28 has a threaded shank 28a ?tting in mem
Fig. 7 is a partial view similar to Fig. 6 showing
ber 21. As illustrated, the lower end of plunger
the dies in closed position;
55 28 is of a diameter slightly less than the inner
2,407,465
3
liameter of portion 210. and member 28 has a re
4
member I6 is depressed and moved downward
duced portion between its lower end and the
against the tension of spring 2!}. The male die
23 remains stationary and the female die 55
threaded shank 28a. Member 2's‘ is secured to a
vertically movable member 23 by a plurality of
circumferentially spaced screws 30 shown as
therefore, moves downward around the same to
the position shown in Fig. 2. The blank 24 is thus
having their'heads countersunk in member 29.
Member 29 is carried on a plunger 29a. Mem
2. When die I5 is again elevated the blank due
to the resiliency of the material assumes the
ber 23 has a recess in its lower portion adjacent
shape shown in Fig. 6 so that the cup or cup
member 2'5 and member 28 has a cylindrical '
like portion formed at its central part is of frusto
molded or formed in the dies as shown in Fig.
shank 2% extending into said recess. Shank 10 conical form. The blank 24 is now placed in
281) has a radial hole 28c adapted to receive the
position over the member 3.3 as shown in Fig.
end of an operating tool for turning member 28.
6. The blank now has a flat annular rim at its
Member 28 is shown as having a passage 28d of
outer portion and this rests upon the upper end
comparatively small diameter extending central
of member 4!. The upper die assembly is now
ly thereof and the same extends laterally in por 15 moved downward and annular die Zla. descends
tion 28b and has connected thereto a pipe or con
in line with and centrally of annular member
duit 3|. Passage 28d at its lower end communi
40. The lower end of plunger 28 engages the
cates with radially extending passages 28c which
top of the blank 24 and holds the same flat
extend to the outer side of the reduced portion
against the top of member 35. Members 23 and
above the lower end of plunger 28. Said upper 20 Z‘la. move downward together and annular mem
assembly is adapted to be vertically reciprocated
ber 40 is depressed with members 3% and 39
by suitable means attachedto plunger 29a. A
against the tension of spring 35 so that an
lower die assembly is also shown in Fig. 6 com
nular portion Ela. moves downwardly within
prising a stationary frame member 33 through
member 4| as shown in Fig. '7. There is suffi
which extends a cylindrical passage 330.. A plate 25 cient room about annular member 21a when it
34 is supported on frame member 33, the same
is within member 4| so that the material can
having a central recess 34a in its top side and a
draw downwardly around the lower end thereof
central passage 34b of comparatively small di
without undue strain or tearing to bring the
ameter extending therethrough. A compression
blank to the form shown in Fig. 7. The ?at an
coiled spring 35 has its lower end resting on the
nular rim on the blank has now been turned
bottom of recess 34a and supports at its upper
downwardly to form an annular ?ange and an an
end a member 33 having a frusto conical top sur
nular groove is thus formed about the under
face. Member 35 also has a reduced lower por
side of the blank. Air is supplied through the
tion Sta received in the upper end of spring
pipe 3| and passes out through passages 23c and
35. A pipe or conduit 31 extends through pas 35 downwardly around the lower die assembly and
sages 33a and 34b and is secured in the upper
prevents the blank from being lifted by the up
end of member 35, the same having an upper end
per assembly when the latter is raised.
disposed at the top of member 35. Member 36
The third step in the method is performed
supports on its top surface a die 39 having a flat
with the dies in the position shown in Fig. 8.
top surface and a cylindrical periphery. Mem 40 Plunger 28 has been lowered some distance below
ber 39 is hollow or internally bored and members
the position it occupied when the second step
35 and 36 are disposed within the inner side
of the method was performed on the blank. The
thereof. Member 39 has in its cylindrical pe
blank is now in position with the central cup
riiohery adjacent its top, an annular groove 3911..
like portion ?tting over the upper end of meme
Member 39 has an annular projection 3% at its 45 ber 39. The upper assembly which has been
lower end forming an annular shoulder or ledge
raised is again lowered and the top of the blank
on which is supported an annular member All.
is held in ?at condition between plunger 23 and
In its normal non-operative position as shown in
the upper surface of member 39. As the upper
Fig. 6, the top of member Gil is substantially flush
assembly moves downward members 39 and 43
with the top of an outer stationary member 4| 50 move downwardly against the tension of spring
35. Member 46 comes to rest seated against the
within which member 4a”! ?ts and within which it '
is movable with member 35. Member 4! is sup
top of the boss 340 as shown in Fig. 8 and this is
ported upon a boss 34c on the top of plate 34.
the same position it occupies when depressed for
The second step of the method of the invention
the second step on the blank. Member 39 how
is performed in the die assembly shown in Figs. 55 ever is not stopped but moves downward into
the recess 34a as shown in Fig. 8 and it now
6 and '7.
In Fig. 8 another die assembly is shown.
occupies a position lower than the position it
While this could be separately made and be an
occupies when depressed for the second step. It
entirely separate unit from the structure shown
moves through an additional distance equal to
in Figs. 6 and '7, it may also be formed by the
the distance that plunger 28 was lowered by
change in the position of the upper die assembly
turning thereof. The distance between the top
shown in Fig. 6. A tool can be inserted in hole
of member 40 and the bottom of member 23 has
280 and member 28 rotated through a partial
therefore been reduced and the depth of the
revolution to bring member 28 to a lower posi
blank or cover will thus be reduced. The groove
39a in member 39 is now disposed substantially
tion in die 21a. In the embodiment illustrated
in line with the top of member 40. When the
the structure is the same therefore in Fig. 8 as
blank is thus reduced in depth it is compressed
in Fig. 6, except that member 28 is in a posi
and the material is squeezed into groove 39a and
tion about 111 of an inch lower than the position
this forms a tight or sharp bead or ridge about
it occupies in Figs. 6 and '7.
In carrying out the ?rst step of the method 70 the lower inside corner of the blank as seen in
Fig. 8. This has the effect of stiffening the
the flat circular blank 24 which is made of rather
cover and the outer ?ange of the blank or cover
stiff paper-like material is placed in the recess
is again pressed into the dies and ironed so to
I6a. Die I5 is then moved downward and the
speak, so that it is pressed ?rmly into place. The
blank 24 is engaged ?rst by the lower annular
dies shown in Figs. 6 and 7 and in Fig. 8 are
75
portion of die l5. As die l5 moves downward
2,407,405
heated so that a good ironing e?'ect is produced.
The dies shown in Figs. 1 and 2 have been used
in a non-heated condition.
When the upper die
assembly as shown in Fig. 8, is raised, the blank
will be helddown on the lower assembly as above
described. When the upper assembly has moved
upward a blast of air can be turned by a suitable
valve through pipe 31 and this lifts and dis
taneously and all operate on the covers. Several
operations'would thus be performed at once. The
operators removing and placing on new covers at
positions 500 and 50f could work in perfect safety
as no upper dies are located at those positions.
A very rapid production of the covers would thus
be possible.
‘
From the above description it will be seen that
I have produced a simple method and apparatus
charges the blank from the lower die assembly.
The blank has now been brought to ?nal form 10 for making a very e?‘icient cap or cover for a con
and the cap or cover is in ?nished condition.
The outer ?ange is substantially cylindrical in
tainer. The successive steps are necessary on the
blank in order that it be properly molded and
form although it may have a very slight ?are.
drawn without damage or tearing. It would not
This would assist in placing and ?tting it on top
be possible to bring the cover to ?nal form with
of the container 44 as shown in Fig. 11. The 15 just one operation. The dies are so arranged
central cup-like portion of the cover ?ts down
that the edge of the blank can be drawn in to give
tightly within the container 44 so that a seal is
the desired bends and shape. The heated dies act
obtained at the inner side of the container across
to press and iron the cover so that the ?nished
the top thereof and at the outer side. The com
cover is of properv and desired shape and will
pleted cover designated 24a, has the bead or rib 20 retain such shape. The covers can he very rapidly
241) formed at the top of the cup-like depression
produced and constitute a very e?icient closure
therein or at the inner corner of the annular
for the container.v The cover ?ts tightly on the
channel of the cap. This as stated, sti?ens the
container and will not be removed by liquid in the
cap and assists in holding the same in the de
container engaging the same.
sired form. A simple and yet very efficient cap 25
The method and apparatus have been amply
or cover has been produced.
demonstrated in actual practice and found to be
In making a machine to produce the covers in
very successful and veiiicient.
large quantities 9, turret 50 such as shown in Fig.
It will of course, be understood that various
12,v could be used, and this would be revoluble
changes
made in the form, details, arrange
about a central shaft 5| as indicated by the 30 ment andmaybe
proportions of the apparatus and in the
arrow The. circles shown on the ?gure would
steps and sequence of steps of the method with
represent die assemblies, particularly the lower
out departing from the scope of applicant’s inven
portion of the die assembly shown in Fig. 1. The
tion, which generally stated, consists in a method
turret would be rotated intermittently 1/6 of a
revolution. The said turret would be used to 35 and apparatus capable of carrying out the objects
above set forth, such as disclosed and de?ned
perform the second and third operations on the
in the appended claims.
cap. The lower die assembly shown in Figs. 6,
What is claimed is:
7 and 8 would be located at the circles shown on
1. A method of making a cap or cover for a
the turret. At position 50a the upper die as
sembly as shown in Fig. 8, would be located. 40 container for food or other material which con
sists in pressing a circular flat blank of sheet
There would be no upper die at positions 500 and
material such as cardboard or comparatively thick
50)‘. At position 5901 the upper die assembly
paper at its central portion to form a cup therein
shown in Figs. 6 and 7 would be located while at
with
a ?at circular rim thereabout, then pressing
position 50c the upper die assembly shown in
Fig. 8 would be located. The turret 50 would 45 the outer part of said rim into frusto conical shape
to form a down turned ?ange extending for some
thus movably carry the lower die assemblies and
distance from the top of said cup, thus forming
the paper blanks placed thereon while the upper
an annular groove around the underside of said
die assemblies would be stationarily located
cover which groove has substantially parallel sides
about the turret and co-act with the lower dies
as the same come into alignment therewith. The 50 and which is adapted to receive the top of said
container, then compressing said cup vertically
covers in the form shown in Fig. 6 would be
and forming a bead or ridge about the top of said
placed on the die assembly at the position 50)‘.
cup to stiifen said cover and forming the whole of
The turret would then move to bring this into
said outer ?ange into substantially cylindrical
position 50a. _Here the upper die assembly
shown in Figs. 6 and '7 would descend and per 55 form.
form the second operation on the cover. The
turret would then move and the cover be brought
to the position shown at 50b. Here the upper
die assembly as shown in Fig. 8 would descend
and perform the ?nal operation on the cover.
The cover would then be moved by the turret
to position 560 and here the same would be re
moved from the dies. Another cover as shown
in Fig. 6, would be placed on the lower die and
the second and third operations would succes
sively be performed thereon at positions 50d and
50e. The cover would then be moved to posi
tion 58f where it would be removed from the dies
and another cover as shown in Fig. 6, placed in
position. Operators .would be located at posi
tions EM and 500 and the caps as shown in Fig.
6, would be continuously and successively placed
on the lower die assemblies as they stopped at
said positions. The upper die located at posi
tions 50a, 50b, 50d and 50e would descend simul
2. A method of making a cap or cover for a
container which consists in providing a ?at circu
lar blank of paper-like sheet material, pressing a
cup-like depression in the central portion thereof,
then pressing the entire outer edge portion of
said blank to form an outer downturned ?aring
?ange thus forming an annular groove having
substantially parallel sides adapted to receive
the top of said container, and then pressing said
cover to form a sharp bead or ridge about the top
65 of said cup and decreasing the depth of said cup.
3. A method of making a cap or cover for a
container which consists in pressing a ?at circular
blank of sheet material such as cardboard or stiff
paper between dies to form a- cup-like depression
in the central portion thereof, pressing the same
between dies to form the entire outer part of said
blank into a downturned annular ?ange thus
forming an annular groove having substantially
parallel sides, which groove is adapted to receive
75 the top of said container, then pressing the same
8
betweendiesio :reducethe depth of?said cup-like
udepressionandform a sharp bead orridge. about
1 the top edge of said cup and bring said ?ange into
substantially cylindrical form.
4. An apparatus ‘.for forming a ,capror cover.
having in combination, means for forming a cup
like depression in the central portion of a flat
circular one-piece blank of sheet material, means
' for turning down a portion of said blank extend
' G‘HThe. method of‘ making a cap or .coverior a
a container which consists in pressing a flat sub
» stantiallycircular blank of paper-like sheet mate
.rial between dies to form a cup-like depression
in'the centralv ,portion thereof, holding the cen
~ tral portion of said vblank in ?at condition and
then pressing the same to form the entire edge
portion of said blank into cylindrical form spaced
from and extending about said depression to form
an annular groove adapted to receive the top of
ing from its outer edge inwardly a substantial 10 said container and then again pressing said blank
distance to form an annular ?ange and thus form
to form an inwardly extending sharp bead or
an annular groove having substantially parallel
- ridge about. the top inner corner of said groove to
sides at the underside of said blank and means
strengthen said cover.
for forming a bead or ridge about the top of said
'7. An apparatus for forming a cap or cover for
cup-like depression or at the inner corner of said
a container having in combination, means for
' groove.
forming a cup-like depression in the central por
5. The method of making a cap or cover for a
tion of a flat circular one-piece blank of paper-like
container Whichconsists in pressing a one-piece
sheet material, means for forming the edge por
substantially circular blank of paper-like mate
tion of said ‘blank into annular form about and
rial having considerable resiliency to form a cup-l 20 spaced from the Wall of said depression, thus
like projection at its central portion with a flat
forming an annular groove adapted to receive the
rim thereabout, then pressing said rim including
toplof said ‘container and means for-compressing
- the entire outer portion .of said blank into cylin
said blank having therein a small annular depres
drical form to extend along but spaced from said
sion into which the upper inner corner of said
projection to form an annular groove adapted:
groove is pressed inform a sharp bead or ridge
to receive the top of said container and then
about said corner to strengthen said cover.
pressing said blank to form an inwardly extending
pinched bead about the upper inner corner of
said annular groove to strengthen said cover.
LAWRENCE / G. ZESBAUGH.
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