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Патент USA US3099124

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July 30, 196s
c. .__ EDDY
Filed NOV. 30, 1960
¿HA/W55 ¿ää/S f‘ßßy
United States Patent O ” ICC
Patented `Fuly 30, 1963
manently l,onto the container. rIlhis is especially advan
togeous in packing lines where the gluing station is
yremoved »from the filling station.
An object lof the invention therefore is the provision
Chartes Lonis Eddy, Flor-ham ïmk, NJ., assigner to
American Can Company, New York, NX., a corpora
tion of New Jersey
Filed Nov. 30, 1960, Ser. No. 72,7 i6
of a method of handling a fibrous slip cover container
'wherein the «top slip cover is carried on the bottom
end «of the container during shipment, storage and/or
6 Claims. (Cl. 53-41)
filling -in such manner as to insure »that it remain thereon
until the packer is ready`to permanently secure it to
The present invention relates to fibre slip cover con
tainers, and more particularly to such containers which l() the open mouth »of the container.
Another object is the provision of a container con
are constructed in a manner which permits them to be
struction which makes it possible to practice lthe instant
transported ‘from their place of manufacture to a ñlling
method invention.
station with their covers removably attached to them
.Numerous other `objects and advantages of the inven
and with one end open, ready to be filled with a product.
tion will be apparent as it is better understood from
One type of container which has long been in use
is the so-called fibre salt can which comprises an un
ilanged tubular body having both off its ends closed by
means of fibrous slip covers which are glued in place
thereon. Heretofore, these cans have been nised almost
the 'following description, which, taken in connection
with the accompanying drawings, discloses a preferred
embodiment thereof.
Referring to the drawings:
exclusively for «the packaging of salt and have been
shipped by the manufacturer to the packer with both
¿FIGURE l is a perspective view of the container of
the instant invention after it bas been filled and finally
ends permanently `glued in place, the lfilling of the salt
rately from the container. However, this method of ship
a novel container l0 which is specially designed to permit
lthe practice -of the method steps of the invention. As
disclosed in these figures, the container 10 comprises a
tubular body 12 which is preferably cylindrical in cross
FIG. 2 is a vertical section taken substantially along
into the container being done through a small hole which
the line 2_2 in lFiG. l;
is cut in the top slip cover.
FIG. 3 is a view similar to FIG. 2 but showing the
Recently, however, such containers have been used in 25
container with its top end temporarily secured in place
the packaging of non-ñowa'ble bulky »goods such as stock
'over the bottom end, preparatory to shipment from its
ings, lingerie, etc. In such packages, the top slip cover
place of manufacture, and
is imperforate, and the goods must be lfilled through an
lFIGS. 4 through 8 illustrate successive steps of the
open end of «the container. As a result, the containers
must be shipped by the manufacturer to the packer with 30 instant method invention.
As a preferred and exemplary embodiment `of the in
one of their ends bnsealed. The usual practice in such
stant invention, IFIGS. l to 3 of the drawings disclose
case would be to ship the lunsecured slip covers sepa
ment ‘has certain drawbacks which are inherent in it
because of Ithe nature `of the slip covers, which are drawn
from iiat sheet stock and formed with single thickness
peripheral franges which are iiimsy and easily distort-able
until they are rglued in place ‘on the container body, which
section but which can be `of any suitable cross-sectional
shape. The bottom manginal end portion 14 of the
body 12 is inwardly offset form 'the normal contour
are easily damaged when shipped separately from the 40 `onf «the body in onder to receive a ‘drawn bottom slip
cover 16 which preferably is formed from suitable fibre
cartions in unnested relationship. if they are shipped in
sheet stock and is ‘formed with a imperforate flat central
nested relationship in stacks, the slip covers have a tend
panel 18 and an annular peripheral flange 2t? which eX
ency to lbecome wedged together and cannot be easily
tends at right angles to the panel 13. The inside surface
The present invention contemplates the elimination of 45 of the slip cover flange 20 and fthe outside surface of
the necked-in «bottom marginal end portion 14 of the body
these ldrawbacks by providing a container construction
are Idisposed in substantially lface to face engagement and
wherein a top slip cover is temporarily secured in place
are permanently joined together by a suitable adhesive
on the bottom `end of the container which it will eventual
(not shown) which is interposed between them.
ly seal. To permit this, the top slip cover is made larger
The upper marginal end portion 22 of the body 12 is
in `diameter than the bottom slip cover and is telescoped 50
also necked-in, but somewhat more shallowly than is the
over Ithe bottom slip cover after the latter has been per
bottom marginal end portion 14, the difference in depth
manently assembled to the container 'but prior to ship
of offset between these two portions being equal to the
ment of the container to the packer.
thickness of the bottom slip cover iiange 20 so that the
In `order to stiften the flange of the telescoped slip
cover and to cause it «to shrink into tight «frictional con 55 diameter of the outer surface of the ñange 20l is substan
tially equal to the diameter of the youter surface of the
tact with the bottom slip cover, it is subjected to a
necked-in body portion 22.
heating :operation after it bas been positioned on the
The container 10? also comprises a top slip cover 36
bottom of the container.
thereafter supports them.
As a result, the slip covers
which is essentially similar in construction to but some
After the Itop slip cover has thus been temporarily se
cured in place on the bottom end of the container, the 60 what larger in diameter than the bottom slip cover 16,
being provided with ya central imperforate panel 32 and
rigid ‘bottom end assembly provides a sol-id base for it
right angled annular peripheral iiange 34. The inside
and consequently there is little or no chance that the
diameter of the ñange 34 is about equal :to or slightly
top slip cover will become damaged or will fall off dur
larger than the outside diameter of the bottom slip cover
ing the time it is shipped to the packer and is conveyed
ñange 20 and the upper necked-in body portion 22, so
in bis runways. As a result, the packer is virtually as
sured of receiving a top slip cover with each container 65 that the top slip cover 22 can be telescoped onto either end
»of the container it? after the bottom slip cover 16- is perma
and of having it remain with the container 'during its
nently secured in place. To finally seal the container
1G, the top slip cover 3€?l is glued onto the top end of the
tion, since fthe container is shipped with its top end
open, the packer need not remove the top slip cover 70 container body 12, -as seen in FIG. 2. However, since
the container 10 must be filled with a bulky product 33,
prior to filling the container, but can defer this opera
which may comprise an article made of a textile, the top
tion until he is ready to .glue the top slip cover per
'handling prior to and during ñlling operation. In addi
slip cover 30 cannot be glued in place on the body 12 at
its place of manufacture, but must be transported in un
glued condition to the place at which the ñlling operation
takes place.
In many instances, as where the container 10 is manu
46 to readily receive the `bottom end of the container. The
interior portion 48 of the ring 4i), however, is preferably
cylindrical and is so -dimensioned that it presses the ilange
34 of the top slip cover 30 into intimate face-to-face con
factured by a container manufacturer, the empty unsealed
container must be shipped and transported to the packers’
plant for lilling. Such transportation may necessitate the
tact with the flange .14 during the time it is being heated
in order to reshape the llange 34, if it has already become
distorted, and to insure face-to-face contact between the
flanges 34 and 14. The application of heat to the flange
over-the-road shipment of such container by truck or rail
and usually also includes a preliminary handling in con
34 drives out `a -good part of the moisture in its libres and
causes it to contract and to shrink into tight, pressured
veyor runways in the packers’ plant in order to convey it
to the filling station. In other instances, as where the
engagement upon the flange Ztl.
container is manufactured adjacent the packers’ plant,
over-the-road shipment is not necessary but the empty con
tainers must still be transported to the iilling station by
Frequently, after the container has been filled, the top
slip cover 30 is manually placed in position over the open
mouth of the container to seal it, this sealing operation
usually taking place at a separate sealing station. To
facilitate this sealing operation, it is desirable that the
top slip cover 30 be immediately available to the sealing
operator. The method steps of the instant invention,
which will now be described, provide a mo-st convenient
As soon as »this has been
accomplished, the container is removed from the shrink
ing ring 4G and lis thereafter transported to the lilling sta
tion. During this transportation, which as previously
stated may include over-the-road shipment as well as in
plant shipment, the top end member 3d remains securely
in position on the bottom end of the container.
FIG. 3
illustrates the position of the container components during
such transportation. It will be noted that in this stage,
the outer sunface of the flange 34 is substantially llush with
the outer surface of the body :12. This is desirable be
cause it Ilessens the possibility of having the raw edge of
the llange 34 catch upon some other article, thereby caus
ing detachment of the top slip cover 3%, and is made
manner of fuliilling this rekuirement by making it possible 25 possible by the fact that the depth of offset of the necked
to firmly but detachably secure the top slip cover 30 to
in portion 14 is substantially equal to the combined thick
nesses of the slip cover `flanges 2t), 34.
the bottom end of fthe container during the time the con
tainer is being transported and filled, and by insuring that
At the filling station, the product 38 is inserted into the
container 16 through its open top end, as seen in FIG. 6.
the top slip cover remain thus secured in position up until
the time the illled container reaches the sealing operator, 30 During this lllling operation, the top slip cover 3i? remains
in non-interfering position on the bottom end of the
who needs only detach the `top slip cover from the bottom
end of the container and slip it onto the upper end of the
container, as shown in FIG. 6, and requires no attention
from the filling operator.
After the filling operation has been completed, the
tom slip cover 16 is glued in place on the necked-in bot 35 necked-in top marginal end portion 22 of the container
body 12 is covered with a ñ-lm of an adhesive or glue Si)
tom marginal portion 14- of the body 12 in order to pro
which is preferably applied by a small adhesive applying
vide a partially formed container having a closed bottom
roller 52 as seen in FIG. 7. Concurrently the top slip
end. Next, the top slip cover 30 is positioned outwardly
container to which glue has previously been applied.
As a preparatory step of the method invention, the bot
of the closed bottom end of the container, as seen in FIG.
cover Sil is removed from the bottom end of the container,
4, ‘and is fthen pressed into telescoping relationship over 40 as is also illustrated in FIG. 7. Such removal is made
possible by the fact that the previously described shrinking
the permanently secured bottom slip cover 16. This step
operation, although resulting in a secure frictional Igrip of
is made possible by the fact that the top slip cover 30 is of
the top slip cover 30 around the bottom slip cover 16, does
not permanently secure the top slip cover 30 in place on
dimensioned as to create a snug lit between them which 45 the container but merely secures it llrmly enough to pre
vent its inadvertent removal. Thus, when a straight longi
would provide su?lcient frictional engagement to re
tudinal force is intentionally applied to the top slip cover
tain the top slip cover 30 in place on the closed bottom
3i), it slides `along the bottom slip cover flange 20 and be
end of the container until it is intentionally removed there
comes detached from the container.
from by the sealing operator. However, in actual prae
After the top slip cover 30 has thus been removed from
tice such a `snug llt cannot be consistently obtained be
the bottom end of the container, it is telescoped over the
cause `of the fact that the drawn llange 34 of the top slip
larger diameter than the bottom slip cover 16.
In theory, the >slip cover flanges 22 and 14 could be so
necked-in upper marginal edge portion 22 of the body 12
cover 30 has an inherent tendency to flare out and re
(see FIG. 8) and is permanently secured in place thereon
sume its original flat shape. This results in a loosening of
upon the setting of the adhesive 50, after -which the
its grip on the flange 2t) and ya consequent falling yolf of
the top slip cover 30 from the bottom end ofthe container. 55 lilled container Á12 is ready for ship-ment through normal
trade channels to the ultimate consumer. FIGS. 1 and 2
To prevent this, after the top sli-p cover 3i]> had been
illustrate the lill-ed container after the iinal sealing step has
telescoped over the bottom slip cover 16, it is subjected
been accomplished. In this stage, the outer surface of the
to a `shrinking operation which drives the moisture from
llange 34 is llush with the outer surface of the body 12,
`the iibrous stock of the ilange 34 and actually causes the
flange 34 to contract diametrically into pressured engage 60 while the flange 20 is recessed a distance which is equal
to the thickness of the flange 3'4.
ment against the ilange 14 and to thus greatly enhance the
It will be understood that the outer surface of the body
frictional engagement between the top and bottom slip
12 may be covered with a suitable label (not shown)
covers 30 and 16. This shrinking engagement also has
which may either be printed directly on the body y12 or
the effect of setting the libres in the flange 34, and inhibits
its tendency to return to its 'original flat state, thus substan 65 may take lthe form of a separate label sheet (not shown)
which -is adhesively secured to the outside surface of the
tially eliminating the inadvertent detachment of the top
container and which may overlap and be secured to all or
slip cover 3d lfrom the Ábottom end of the container.
a part of the slip cover flanges 20, 34. If the label is thus
Y The shrinking operation is preferably elfected by in
overlapped, the fact that neither of the flanges 20, 34 eX
serting the bottom end of the container, after the top slip
cover 30 has been properly positioned thereon, into an an 70 tends outwardly beyond the surface of the body 12 en
hances the finished appearance of the container 12. How
nular metal shrinking ring 4@ which is maintained in a
ever, it will be clear that the invention may still be prac
heated condition by any suitable means. In the instant
ticed even if both marginal end portions of the body 12
disclosure, as seen in FIG. 5, the heat is applied by an open
are not necked-in, the main requirement being that the
llame 42 which emanates from an annular ‘gas burner 44.
outside diameter of the bottom slip cover llange 20 be
The ring 4t) is preferably provided with -a tapered mouth 75 equal to the outside diameter of the upper marginal end
portion `of the container so ‘that the top slip cover 30 will
ñt onto both the bottom and the top ends of the container.
It is thought that the invention and many of its attend
ant `advantages will be understood from the foregoing de
4. The method of handling tubular containers having
ñbrous top and bottom slip covers provided with flanges of
different diametral dimensions, said -dimensions internally
as those of said top marginal end portion, and -a íìbrous
top slip cover with a peripheral flange having its internal
diametral dimensions substantially the same as the internal
of said top cover being substantially the same as those eX
of said top cover being substantially the same as those eX
ternally of said bottom cover, which comprises permanent
scription, and it will be apparent that various changes may
ly securing a flanged fibrous bottom slip cover onto the
be made in the form, construction and arrangement
bottom marginal end portion of a container body, placing a
of the parts and .that changes may be made in the steps
flanged iibrous top slip cover telescopically over said bot
of the method described and their order of accomplish
tom slip cover with the -ñange of said top slip cover in
ment without departing from the spirit and scope of the
invention or sacriiicing all of its material advantages, the 10 frictional engagement with the flange of said bottom slip
cover to detachably secure said -top slip cover in place, and
form hereinbefore described being merely a preferred em
transporting said container -With its top slip cover -thus
bodiment thereof.
secured and with its top end uncovered preparatory to lill
I claim:
ing said container with a product.
1. A container comprising a tubular body having a
5. The method of claim 4 with »the 'additional step of
top and a bottom marginal end portion, the diametral di 15
shrinking the top slip `cover into position onto the bottom
mensions of said bottom marginal end portion being
slip cover in order to intensify the frictional engagement
smaller than those of said top marginal end portion, a
between said slip covers during shipment.
fibrous bottom slip cover having a peripheral flange which
6. The method of handling tubular containers having
snugly engages around and is permanently secured to said
bottom marginal end portion of said body, said ñange hav 20 íibrous top and bottom slip covers provided with ñanges of
different diametral dimensions, said ydimensions internally
ing external diametral `dimensions substantially the same
ternally of said bottom cover, ‘which comprises permanent
ly lglueing a flanged fibrous bottom slip cover onto the
idiametral dimensions of both said vtop marginal end portion 25 bottom marginal end portion of a container body, placing
>a ñanged ñbrous top slip cover telescopically over said
and said flange ofthe bottom slip cover and detachably en
bottom slip cover, heat-shrinking said top slip cover onto
gageable around the ñange of said bottom slip cover to re
said bottom slip cover in order to create a strong tem
tain said top slip cover in place on the bottom of said con
porary frictional engagement between said slip covers,
tainer prior to the filling `of said container w-ith a product.
2. The container of claim 1 wherein said bottom slip 30 transporting said container with its top slip cover thus
secured and with its top end uncovered to a ñlling station,
cover is permanently glued to the bottom marginal end
filling said container With a product, removing said top
portion of said body and wherein said top slip cover is
slip cover yfrom the bottom of said container, and glueing
shrunk into place on said bottom slip cover.
said -top slip cover into place on the top end of said body
3. The container of claim 2 wherein both the top and
the bottom marginal end portions of said body are necked 35 to seal said container.
in to accommodate said slip covers, the bottom marginal
References Cited in the ñle of this patent
end portion being necked-in to ya depth greater -than that
of said top marginal end portion by a distance which is
equal to the thickness of the ñange of said bottom slip
Ladd ________________ __ Nov. 11, 1941
Balasevich ____________ __ Sept. 16, 1952
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