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Патент USA US2130637

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Sept. 20, 1938K.
F.4|_. DARLING'
2,130,637
VACUUM SEALING CAN
Filed Nov. l5, 1935
gmc/who@
w1
Patented Sept. 20, 1938
2,130,637
UNITED, STATES PATENT' OFFICE
2,130,637
VACUUM sEaLING CAN
Frank L. Darling, D‘ouglaston, N. Y., assignor, by
lmcsne assignments, to Crown Can Company,
Philadelphia, Pa., al corporation of Pennsyl
vania
Application November 15, 1035, Serial No. 50,019
i 1
Claim.
My invention relates to certain new and use
ful" improvements ‘in cans for packing coffee,
malted milk and other food products.
The present invention is a modification of the
5 generic invention disclosed in my application
Serial No. 20,838, filed May 10, 1935, and it has
. for its principal object to provide for the use of
a vulcanized soft rubber elastic sealing ring or
rings as the sealing element.
Other objects will in part be obvious and in
part be pointed out hereinafter. _
To the attainment of the aforesaid objects and
ends the invention still further resides in the
novel details of construction, combination and
15 arrangement of parts, all of which' will be first
fully described in the following detailed descrip
tion, and then be particularly pointed out in the
appended claim, reference being had to the ac
companying drawing, in Which:20
Figure 1 is a detail vertical cross section on the
line I-I of Figure 2.
Figure 2 is a top plan view of a can embodying
the invention.
Figure 3 is an enlarged detail view showing the
plug-closure about to be pressed down.
Figures 4 and 5 are similar detailed views of
modified forms of the invention.
In the drawing, in which like numerals and let
ters of reference indicate like parts in all the
figures, I represents the can and 2 the seam be
tween the can I and its top 3.
The top 3 has a filling opening which is bound
ed by an upwardly and outwardly flared flange
5. Surrounding the fiange 5 and spaced from it
35 is an upstanding bead 4, that portion of the top
3 between the flange 5 and the bead 4 serving
as a seat against which the annular supporting
portion 9 of the plug-type closure 6 rests in order
to prevent contact between the cut edge of the
40
flange 5 andthe crown 8 of the closure 6 when
the closure is forced into place.
The closure 6 includes an annular wall 'l which
mer-ges with the crown or upstanding bead 8.
The bead 8 serves as a cover for the flange 5 and
4.5
also` has a seat or stop for the sealing ring I3,
(Cl. 220-44)
sealing ring I3 projects. The ring I3 may be a
rubber band of suitable dimensions and may be
cut from^a rubber tube if desired.' In addition to
the ring I3 a second ring I4 of elastic rubber
or of plastic may be used to overlie and receive
the cut edge of the flange 5b, as shown in Fig
ure 5.
In Figures 4 and 5 are illustrated modiñed
forms of the invention, In Figure 4 those parts
which correspond in purpose or function to those l0
of Figures 1 to 3, inclusive, bear the same ref
erence numeral plus the index letter “a”, while
similar parts in Figure 5 bear the same reference
numeral plus the index letter “b”, so a detailed
description of these figures is thought to be 15
unnecessary. In Figure 5, I4 designates the sec
ond rubber ring (or plastic substance, if such be
used) that embeds or receives the cut edge of the
ilange 5b.
'I'he stop 9b in Figure 5 prevents the insertion 20
of the plug-closure to such a distance as would
permit the cut edge of the ñange 5b to cut
through the ring I4, or, in other words, to limit
the insertion of the plug-closure so as to stop it
before 5b can pass through I 4.
25
With the construction shown and described,
an elastic rubber ring can be placed around the
wall 'l (la or 1b) and as the closure is forced
down the ring I3 will enter the V-shaped space
I5 and be squeezed into tight sealing contact 30
with the ñange 5 and wall l, the suction, due to
the vacuum in the can, serving to assist in draw
ing the ring I5 into tight sealing engagement
(see Figures 1 and 4). The ring, being of soft
vulcanized rubber, is of course deformable and 35
will be drawn or pressed down into the V-shaped
space I5 to tend to completely ñll it (see Figure 5,
for example).
The annular stop 9, as before intimated, serves
to prevent the plug-closure from being forced 40
down too far and prevents the edge of the flange
5 from cutting through the sealing element I4,
if such be used.
_
`
The present structure, While cheapening the
manufacturing cost somewhat, possesses many of 45
or rings I3b and I4 (see Figure 5) as the case
the advantages of my previously designed can of
may be.
the application aforesaid, in that it will effectively
y
rI'he outer edge of the closure is extended up
wardly and outwardly in order to provide a rim
O I2, from the extreme edge of which, at suitable
intervals, extend points I0 which overlie the
bead 4 and are spot-secured thereto as at II, as
in my former application aforesaid.
The flange 5, making an angle with the wall
55 'Lprovides a V-shaped pocket I5 into which the
hold the vacuum and will be self-venting upon
generation of pressure within the can.
If desired, in the manufacture of the can, the 50
plug wall 'l may be slightly tapered to permit the
cut ring I3 to be easily placed on or slipped on,
and furthermore the tapering will assist in the
pressing of the plug into the can. The rings I3,
if cut from tubing, will be very cheap to manu 55
2,130,637
facture and the expense of molding or squirting a having, in cross-section, substantially the outline
plastic compound into the crown 8 (or 3a,` or 8b» 'of an acute angle, and a rubber elastic sealing
ring on said upstanding wall and adapted to be
as the case may be) is avoided.
It .should of course be understood that the entirely positioned between said flange and said
points I0 are secured to the can lightly, as in my wall to form a seal when the closure is in place,
previous application, so that they will become
detached on the generation of dangerous pres
sures within the can and yet hold for ordinary
pressures to allow the plug-closure itself to Yact
10 as a valve for venting purposes.
From the foregoing description, taken in con
nection with the accompanying drawing, it is
thought that the complete construction and ad
vantages of the invention will be clear to those
15 skilled in the art to which it relates.
What I claim is:
In a can having a filling opening bounded by
an upwardly and outwardly flared flange, a plug
type closure fitting into said opening, and hav
20 ing an annular upstanding wall merging with an
annular crown portion which overlies said flange
on the can, said flange and said annular up
standing wall providing between them a space
the outer surface of said sealing ring being
'adapted to contact with said ñared wall in such
closed position, means to arrest the insertion
of said closure before the edge of said ñange can
touch said crown portion, said closure having 10
points adapted to be secured to the can and by
virtue of which the closure itself may act as a
pressure relief valve, the movement of said seal
ing ~ ring within said acute-angle space upon
closing movement of the closure causing said
sealing ring to be wedged and entirely seated
15,
between said upstanding wall and said ñared
flange, and upward opening movement of said
closure with said sealing ring thereon resulting
in establishing a vent between said sealing ring 20
and said ñared flange.
FRANK L. DARLING.
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