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Патент USA US2117151

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May 10, 1938. -
A. F. cowAN
2,117,151-v
" TIN BOX INTENDED TO BE VACUUMIZEH), OR LIKE CONTAINER
Filed Aug. 30, 1935
Patented May 10, 1938
-
~
2,117,151
UNITED STATES PATENT OFFICE
2,117,151
TIN BOX INTENDED TO BE VACUUMIZED, OR
LIKE CONTAINER
Alan Fraser Cowan,‘ Shirley, England, assignor
to The Metal Box Company Limited, London,
England, a company of Great Britain '
Application August 30, 1935, Serial No. 38,632
‘In Great Britain septcmberizz, 1934
5 Claims.
This invention relates to tin boxes or like con-
tainers intended to be vacuumized and has for
its object to provide an improved construction
whereby uniformity of production obtains.
5
According to the present invention a box or
(01. 220-41)
.
Fig. 7 is a perspective view of the container
body shown in Figs. 1 and 2; and
Fig. 8 is a transverse sectional view of a fur
ther modi?ed construction.
In the drawing like reference numerals deslg- 5
like container intended to be vacuumized has a
nate the same or similar parts.
lid hinged thereto, and the box is provided with
a curled or beaded edge and one hinge member
In one form of manufacture according to the
invention the box'is formed from a rectangular
blank comprising a lateral extension from which
the hinge member is. to be formed.
10
The blank is then drawn and shaped to re
on. the box is formed in an extension of the
10 curl or bead and engages loosely the other hinge
member on the lid, whereby a hinge is formed
allowing play and the lid is free to seat itself
on the curl or bead.
By making the hinge member of the box in an
15 extension of the curl an evenness is obtained
by the curling operation which produces a perfect seating for the lid, hence if packing material is disposed between the curl and the lid a
standard production suitable for vacuumizlng is
quired form and the periphery curled or beaded
so that a continuous. and even curl (or head) ob
tains at the mouth. The extension which, by
the curling operation is pointing downwardly 13
from the bead, is then bent up.
The resultant container body is shown in Fig.
7 in which 'i is the body portion, 2 the curled or
beaded edge and 3 the extension. '
'
‘20 always obtained, whilst if the lid is hinged with
free play the hinge joint gives the lid full freedom to seat itself on the even curl so that an
. A lid 4 (Figs. 2 and. 3) is provided with a skirt, 20
or ?ange or extension 5 formed to drop into the
bent up extension 3 and is slotted at 6 to give
hermetically sealed box maybe obtained under
reduced pressure, and when the vacuum is de25 stroyed the lid remains connected to the box.
The sealing medium may be an elastic band
or a plastic mass. If a band is used the latter
may have a tab which projects and may be pulled.
to displace the band and break down the vacu-
entry through the skirt I of the free end of
the extension 3, the slot being suiii'ciently large
to permit vertical displacement of the lid at the 25
hinge. The beaded edge of the cover ?ange
thusforms a, pintle adapted to be received within
the extension 3 which forms a socket.
By such an arrangement the lid may be turned
30 um, or if a plastic mass is used the box or lid
may have a pin hole closured by a removable
patch or cover as well known in the art;
Experience has shown that'if the curl does not
extend wholly around the mouth and an attempt
35 is made to bend over metal between the ends
of a curl to form one member of a joint that it
is impossible to assure the evenness of seating
required to assure standard production or the
continuity required to assure a sea].
40
In order that the invention may be more clear‘
ly understood, reference will now be made to
about the hinge and when over the. box may fall 30
parallelly to the curl.
The lid l is formed to locate packing mate
rial over the bead and extension and to this end
may be dished to form a wall about which a band.
‘I may be disposed (as shown in Fig. 8) or the 3;,
lid may be formed with a peripheral groove 8 to
locate plastic material or a band ‘I in the lid.
The wall of the container may be formed with
a groove or with an indentation orfbead as shown
at i‘ in F18- 1 for Supporting a 00in 01‘ other im- 40
plement by means of which the “d may be 13'
the'accompanymg drawing which shows by way
of example preferred embodiments thereof.
45
I the drawmg__
n
1
t ‘
Fig‘
is 8‘
ti
1 vi
f n
ran‘sverse sec mm b ew o t O ‘:5
form of construction according to t e inven ion,
Fig. 2 is a perspective view of the container
Show" in Fig' 1;
Fig- 3 is 9' Perspective View on an enlarge-d scale
50
of the hinge construction shown in Figs. 1 and 2;
Figs- 4 and 5 are Perspective Views 01' modi?ed
forms of hinges;
Fig. 6 is a perspective view of a modi?ed con-
55 struction of container;
vered off without ?rst'breaking the vacuum.
Means may be provided' however’ for destroy‘
ing the vacuum before the lid is removed.
_
In the construction shown in Fig. l a pin- 45
hole is provided in the bottom oi’ the container
and this hole is closured by a removable patch
or closure as known in the am
The edge of the lid opposite the hinged .joint
and /or the wall between the hinged joint and the 50
from; of the lid may be provided with protuber
ances 9 to catch under the bead or curl 2 on the
periphery of the box to retain the lid 4 closed
when once the vacuum has been broken.
From the foregoing it will be observed that 55
2 .
2,117,151
many variations may be made in the hinge Joint
without departing from the invention. For ex
ample, the extension 3 from the bead may ex
tend laterally from the box as shown in Fig. 4 and
be slotted as at III to admit freely a tongue ll
depending from the lid 4, the tongue ll being,
for example, curled and/or upset as at I! to pre
vent return through the slot.
The extension 3 on the box previously described
with reference to Figs. 1, 2 and 3 may be formed
with a rib or shoulders as shown at IS in Fig.
5, to limit the angle of tilt of‘the lid in the
"open” position.
Moreover, although the invention has been ex
15 plained by reference to an embodiment in which
one extension only is used, clearly instead of
one hinge a box according to the invention ‘may
be provided with a plurality.
An example of a box having two such hinges
20 is shown in Fig. 6.
The invention has been described in its particu
lar application to a tin box but the invention
applies also to ‘other containers, whether made of
metal, plastic material, such as that material
26 ;known'-on the market under the registered trade
mark “Bakelite”, or containers of‘ glass, whether.
transparent or opaque and in such constructions
a neck ring is secured to the body of the con
tainer so that a lid may be attached to the ring
2. A box or like container adapted to be vac
uumized comprising a body portion having an
outwardly curled or beaded edge, a lid, a gasket
secured to said lid and adapted to engage said
bead for sealing the container, said curled edge
on the body being, extended downwardly, thence
outwardly, thence‘ upwardly and inwardly, said
lid having a skirt formed with a slot for receiving
the inwardly extending portion of said extension
whereby said lid is hingedly connected to said
body portion, said slot being of sufilcient width
so as to enable the lid to seat freely upon the
container before the container is vacuumized,
said upturned portion of the extension being pro
vided with shoulders adapted to engage the lid 15
and serve as stops to limit the tilting movement
of said lid.
3. A box or like container adapted to be vac?
uumized, comprising a body portion having an
outwardly curled edge, a lid, a gasket secured to 20
said lid and adapted to engage said curled edge
for sealing the container, said lid having a de
pending ?ange rolled at the lower end thereof to
form a bead providing a hinge pintle, the curled
edge of said body portion being extended down
wardly to partially encircle and engage the hinge
pintle formed by the bead on said lid, said hinge
pintle occupying only a portion of the space with
in the extended curled edge of said body portion
whereby to permit limited vertical movement of 30
and co-operate therewith to form a closure in ex
actly the same way as if the ring was the wall of
' said lid relative to said body portion so as to en
the body of a tin- box.
In using the term “ring” reference, of course,
is only made to the endless form of the mem
ber attached to the container and not to its spe
ciflc shape, such member may be of hexagonal,
oval, square or of other polygonal form.
Further, it should be understood that the in
vention applies also to tin boxes or containers
40 in which the lid is made of a mouldable material
or is cast whether or not the body portion is a
tin box or a container of other material as pre
viously referred to.
In’ referring to the edge of the mouth of the
45 container as being provided with a curled edge,
this term is intended to include not only rolling
over the edge to obtain a full curl but a mere
?anging or bending over to obtain what may be
referred to as a part or open curl.
50
Although the invention has been described in
its particular application to a box of rectangular
form, the invention is equally applicable to a box
of circular or oval form provided the extensions
' in the lid and the box are relatively narrow so as
55, to permit a turning movement about the curved
periphery of the box and clearly also the box may
have other curved or curvilinear shapes.
What I claim is:
1. A box or like container adapted to be vac
uumized comprising a body portion having an
outwardly curled or beaded edge, a lid, a gasket
secured to said lid and adapted to engage said
bead for sealing the container, said curled edge
65
on the body being extended downwardly, thence
outwardly, thence upwardly and inwardly, said
lid having a skirt formed with a slot for receiving
the inwardly extending portion of said extension
whereby said lid is hingedly connected to said
body portion, said slot being of su?icient width
70 so as to enable the lid to seat freely upon the
a container before the container is vacuumized.
able the lid to seat freely upon the body portion
before the container is vacuumized.
4. A box or like container adapted to be vac
uumized, comprising a body portion having an 35
outwardly curled edge, a lid, a gasket secured to
said lid and adapted to engage said curled edge
for sealing the container, said curled edge of the
body portion having a depending extension bent
outwardly, upwardly and inwardly to form a
hinge member, ,said lid having a depending skirt
and a depressed peripheral portion forming a re
cess for said gasket, said skirt having a bead at
the lower edge thereof and a'slot in the region of
said hinge member on the body portion, said in 45
wardly extending portion on the extension pass
ing through said slot and being of a thickness
less than the vertical width of said slot for loosely
connecting the lid to the body portion whereby to
enable the lid to seat freely on the body portion 50
before the container is vacuumiz
.
5. A box or like container, adapted to be vac
uumized, comprising a body portion having an
outwardly curled edge, a lid having a depending
?ange provided with a beaded edge and having a 65
peripheral bed adjacent said ?ange, a gasket dis
posed in said peripheral bed and adapted to seat
against the curled edge of said body portion, and
a-hinge joint connecting said lid with said body
portion and including a socket integral with the
curled edge on said body portion and a pintle
formed by a portion of the beaded edge on the
lid ?ange, said pintle extending within said sock—
et and only partially occupying the space within
said socket whereby to permit the lid to seat free 65
ly upon the container before it is vacuumized
and also to permit the pintle to move downwardly
a distance greater than the amount of reduction
in thickness of the gasket when the container is
vacuumized.
ALAN FRASER COWAN.
70
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