Patented June 29, 1948
2,444,143
' UNITED STATES PATENT OFFICE
2,444,143:
.
PAPER BQ'I‘TLE CONSTRUCTION
Frank D. Palmer, Ghicago, IlL, assignor to Frank
D. Palmer, Inc, a corporation of Illinois
Application February 8, 1946, Serial'No. 646,435
9 Claims. (01. 93-368)
7
i
r
This invention relates to an improvement in
secured‘ thereto so as to form the blank ‘into a
paper bottle construction and although suscept
ible of other use, it has particular reference to
rectangular tube.
the construction of paper milk bottles.
short ?aps 6 and '1 formed integrally with the
wall panels 2 and 4 and, ?aps 8 and 9 respectively
formed integrally with. the walls I and 3. The
?aps 6 and ‘I are ?rst folded inwardly, then the
flap 9 and thereafterthe flap 8. The flap 9 is
equipped with cut scoring indicated at Ill and
One end‘ of the tube is closed by means of
.
Paper milk bottles havev already been quite
widely adopted in the dairy industry but in the
main, they have. been adopted only by the larger
milk companies who are well able ?nancially to»
procure the necessary paper bottle making equip
‘
ment, and who‘ have‘ the facilities for installing 10 H to form removable sections l2 and l3.‘
The flap 8. is equipped with out scoring Hi
and operating such equipment together ‘with
which cooperates with ‘a hinge formed "by a
sterilizing equipment, usually in the form of
paramning machinery and special ?lling ma
crease l5 to form a hinged ear Hi which will over
lie. the removable portion ll of the ‘?ap 9. The
chinery adapted for the ?lling of paper bottles.
flap 3 is also provided with "scoring H which is
There are many smaller dairies who ?nd it, im
practicable because of ?nancial considerations
extended‘into a ?ap extension l8 where theends
of the score lines are joined by a composite line
to adopt paper bottles for their relatively small
of severance formed by centrally disposed slitting
distribution of bottled milk.
indicated at [9 and scoring indicated at Ell-29.
The present invention has forits object the pro
vision of a paper milk bottle of exceptionally 20 The ends of the score lines I‘! in the flap 8 are
joined by a‘crease formed hinge line 2L The
car 22 surrounded by the lines l'l—.l'l, Ell-2e,
Hand 2! will overlie the removable element iii
simple form but which is nevertheless adequately
leak-proof, of good appearance, and capable of
being set up either by the dairy company or by
of the?ap 9;
a package forming concern without the addition
of special costly package forming equipment.
Other objects and advantages of the invention
will be understood by reference to the following
speci?cation and accompanying drawing (one
sheet) wherein there is illustrated a paper milk
bottle embodying a selected form of the inven
tion.
In the drawing,
‘
~
Fig. 1 is a plan of the blank employed in form
A
The side margins of the ?ap 9 are adhesively
‘united to the inturned ?aps 6 and ‘I and the flap
8 is adhesively united to the underlying flap. 9
except that the ears £6 and 22 are saved against
adhesive attachment of any area of the flap 9
30 outside of the removable elements l2 and I3.
Theear i6 is adhesively attached to the element
i2 and the ear 22 is adhesively attached to the
25
element I3.
r
In the production ‘of a carton embodying this
ing' the paper bottle herein‘ shown;
form,
of end closure, the car it and removable
35
" Figs-2 and‘ 3 are perspectives of the bottom
element l3 will initially be displaced as a unit
end structure showing successive steps in. the
about the hinge line IE to provide a ?lling open
closing of said end of the container;
'
ing indicated at 23 in‘ Fig. 4. The ear Z2 and
‘ Fig. 4 isra vertical section through‘the con
the element l 3 will‘remain in their normal closed
tainer on the plane represented- by the line 4—4
condition and the car 22 will not be displaced
40
of Fig. 3;
from the ?ap 8 and its extension 18 until in the
Fig.5‘ is, in part, a section on the line ‘5--5
hands of the consumer, who will be the ?rst one
of Fig. 4, and in part, a side elevation in which
to open the ear 22 and element I 3. This end
there isillustrated a device which may be em
construction may be considered the top end and
ployedin ‘the operation of closing the bottle.
Each of these figures,‘ 2 to 5 inclusive, repre
sents the container in an inverted position, i. e.,
with the bottom‘ end up.
45 it is substantiallyin accordance with the struc
ture shown in my co-pending application Ser.
No. 632,251, ?led December 1, 1945. The ?apleX
tension [8, as ‘best shown in Fig. 4, overlies the
' The improved paper bottle herein shown is
adjacent end portion of the wall 3 and is ad
formed from a, blank of the character illustrated 50 hesively attached thereto except that no portion
in, Fig. 1. The blank is suitably creased to form
of thel'ear '22 is adhered to the wall 3.‘
‘
body, panels I, 2, 3 and 4‘ and a gluing ?ap 5
The bottom end of the container is closed by
which, in. the process of forming the blank into
means of a pair of flaps 24 and 25 which extend
a carton, is overlapped on thefree marginal edge
from the wall panels it and 3 respectively, and a
portion oi the flap I and adhesively or otherwise st pair of flaps 21B ‘and. 21} which extend ‘from the
2,444,149;
wall panels 2 and 4 respectively. The ?aps‘24
to 21 inclusive, like the ?aps 6 to 8 inclusive, are
hingedly connected to the respective wall panels
to each other and to the underlying ?aps 24 and
25 require some support for the ?aps 24 and 25
by means of creasing in the usual manner.
The ?aps 24 and 25 are of such length that they
each extend across substantially one-half the
corresponding dimension of the end area of the
most ?ap 26 to effect intimate adhesive bonding
of these ?aps.
so that pressure may be exerted on the outer
The sealing strip 23 is not essential in the
described construction or in the described
container body and the flaps '26 and 21 are each
method of closing the container end against
the support provided by the air cushion in
of substantially full size, that is to say, of such
size that they each cover substantially the en 10 the container. However, by the provision of
the sealing strip, leakage of compressed air from
tire end area of the container body. The flaps
24 and 25 are ?rst folded inwardly, then either
within the container is resisted to such an extent
the flap 26 or the ?ap 21 followed by the remain
that an adequate air cushion can more easily be
ing one of these two.
built up in the container to support, or in effect,
To insure leak-proofness in the bottom of the
to press the ?aps 24 and 25 outwardly against
container around the corners formed by folding
the over folded flaps 21 and 26. The ?aps 21
and 26 may be manually or mechanically held
the flaps 24 to 21 inwardly as already explained,
a suitable paper strip 28 is provided, said strip ex
in the desired folded condition as, for example,
tending continuously from the edge 29 of the
by means of a shoe represented at 33, which may
carton blank to the edge 30 thereof and being 20 be a normally stationary member under which
arranged to overlap approximately equal portions
of the blank on opposite sides of the fold lines
which join the flaps 24 to 2‘! inclusive, to the
respective wall panels. It is not essential ‘that
the strip 28 extend equally to both sides of the
fold lines joining the said flaps to the wall pan
els and it may be so arranged as to extend far
ther to one side of said fold lines than to the
other. However, the arrangement shown is sat
the formed containers are propelled in the proc
ess of closing the bottom end of the container.
The shoe may be hollow and provided with inlet
and outlet openings to permit circulation of a
tempering or cooling medium through theshoe
‘ for controlling or expediting the setting of the
isfactory.
The strip 28 is adhesively secured to the wall
panels and ?aps so that when the said ?aps are
folded to closure forming position the corre
sponding portions of the strip 28 are also folded.
The initial position is illustrated in Fig. 2 where
in the ?aps 24 to 21 inclusive, are shown in an
upwardly extending relation to the ends of the
respective wall panels from which they extend
and the corner sealing strip is shown approach
ing the fold lines on which the respective ?aps
are foldable. The ?rst step in closing the con
tainer is to fold the flaps 24 and 25 inwardly
adhesive between the flaps. The sealing strip
28 prevents leakage of compressed air outwardly
between the adhesively united ?ap surfaces and
thereby avoids any tendency to produce imper
iectly bonded flaps. If desired, suitable means
may be provided for sealing the opening 23
around the nozzle 32 to prevent air leakage at
that point, but this is not necessary since an
adequate supply of pressure 'air may include
enough to compensate for such leakage. Also, it '
should be understood that it is preferable that
only su?icient air pressure to adequately support
the inner flaps be employed.
,
Various changes in the described arrange
ment may be made without departing from the
invention as described.
as shown in Fig. 3. This is, of course, accom
I claim:
panied by corresponding folding of the under
1. The method of closing a container compris
lying portions of the strip 28, corner portions 45 ing a tubular body having flaps at one end
thereof being folded over as indicated at 3l-3l
adapted to be folded into- mutually overlying re
on the portions carried by the flaps 26 and 21.
lation to close such container, which consists in
The ?aps 26 and 21 are next folded inwardly,
delivering compressed air into the container, fold
the flap 2'! being shown ?rst folded over, the
ing the ?aps successively inwardly into closure
flaps 24 and 25 and the flap 26 over the flap 21, 50 forming position against the air cushion within
although this order in respect of the flaps 26
the container, and effecting adhesive inter-at
and 21 may be reversed. The provision of the
tachment of the mutually engaging surfaces of
strip 28 serves to provide a substantially con
said ?aps.
tinuous band in the bottom corner of the paper
2. The method of closing a container compris
bottle with consequent reduction of the possi
ing a tubular body having flaps at one end
bilities of leakage developing in said corners.
adapted to be folded into mutually overlying re
By paraf?ning the bottle either by spraying
lation‘ to close such container, which consists
or by immersion in a bath of- molten para?in,
in providing the container with a sealing strip
preferably by the latter method, all voids be
overlying portions of the container body and
tween any parts of the bottom structure will be 60 closure flaps on opposite sides of the fold lines
?lled with para?in so that leakage is more ef
about which the ?aps are foldable into closure 7
fectively prevented.
forming position, delivering compressed airinto
Containers such as here described are usually
the container and maintaining such air delivery
formed about a solid mandrel against which the
to compensate for air escaping from the con
end closure ?aps are pressed while effecting ad 65 tainer to thereby maintain an air cushion with
hesive inter-attachment of the ?aps forming the
end closure. However, with the described con
struction it is practicable to close the end closure
in the container, folding the?aps successively
inwardly into closure forming position against
the air cushion within the container, and effect
flaps against compressed air delivered into the
ing adhesive inter-attachment of the mutually
container through the ?lling opening 23 by 70 engaging surfaces of said flaps, said sealing strip
serving to prevent the escape of compressed air
means of an air nozzle 32 which is connected to
a suitable source of compressed air. The '?aps
24 and 25 may, of course, be initially folded in
into the areas of adhesive inter-attachment to
wardly without regard" to any support therefor
but adhesive attachment of the flaps 26 and 2'! 75
gether in closure forming position.
thereby insure e?ective bonding of said ?aps to
_
.
v3. The method of closing a container compris
2,444,143
5
ing a tubular ?oody having ?aps at one end
adapted to be folded into mutually overlying
relation to close such container, which consists
in providing the container with a sealing strip
overlying portions of the container body and clo
sure ?aps on opposite sides of the fold lines about
which the ?aps are folda'blle into closure form
ing position, delivering compressed air into the
6
7. The method of closing a container embody
ing a tubular body having one end closed and
provided with a ?lling opening and its other end
provided with adhesive bearing ?aps adapted
to be folded into mutualy overlapping, adhesively
interconnected relation in closure forming posi
tion on‘ said other end of the body, which con
sists in providing the container with a sea-ling
strip on its inside and overlying portions of the
container, folding the flaps successively inwardly
into closure forming position against the air 10 closure flaps and tubular body on opposite sides
of the fold lines on which said ?aps are foldable
cushion within the container, and effecting ad
into closure forming position, delivering com
hesive inter-attachment of the mutually engag
pressed air into the body of the container through
ing surfaces of said flaps, said sealing strip serv
said ?lling opening, then folding said ?aps into
ing to prevent the escape of compressed air into
the areas of adhesive inter-attachment to there 15 closure forming position and holding the outer
most of said flaps in said position while the air
by insure effective bonding of said flaps together
pressure rwithin the container presses said ?aps
in closure forming position.
into intimate inter-engagement, said sealing
4. The method of closing a container embody
strip serving to prevent the escape of compressed
ing a tubular body having one end closed and
provided with a ?lling opening and its other end 20 air into the zones of inter-engagement between
said flaps, and coating the container inside and
provided with adhesive bearing ?aps adapted to
out with water proo?ng material.
‘be folded into mutually overlapping, adhesively
8. The method of closing a container compris
interconnected relation in closure vforming posi
ing a tubular body having one end closed and
tion on said other end of the body, which con
sists in delivering compressed air into the body 25 provided with a ?lling opening and its other end
provided with adhesive-bearing flaps adapted to
of the container through said ?lling opening,
be folded into closure~forming position on said
and then folding said flaps into closure forming
other end of the ‘body, which consists in folding
position and holding the outermost of said ?aps
said ?aps into closure-forming position, holding
in said position while the air pressure within the
container presses said ?aps into intimate inter 30 the outermost of said flaps in said position, and
delivering compressed air into the body of the
engagement.
container through said ?lling opening so as to
5. The method of closing a container embody
cause said compressed air to press said ?aps into
ing a tubular body having one end closed and
intimate, adhesively secured interengagement.
provided with a ?lling opening and its other end
9. The method of closing a container compris
provided vwith adhesive bearing flaps adapted to 35
ing a tubular body having one end closed and
be folded into mutually overlapping, adhesively
provided with a ?lling opening and its other end
interconnected relation in closure forming posi
provided with adhesive-hearing flaps adapted
tion on said other end of the body, which consists
to toe folded into closure-forming position on said
in providing the container with a sealing strip
on its inside and overlying portions of the 010 40 other end of the body, which consists in provid
ing the container with a sealing strip on its in
sure flaps and tubular body on opposite sides
side and in overlying relation to portions of the
of the fold lines on which said flaps are foldable
closure flaps and tubular body on opposite sides
into closure forming position, delivering com
of the Ifold lines on which said ?aps are fold
pressed air into the ibody of the container through
said ?lling opening, and then folding said flaps 45 able into closure-forming position, folding said
flaps and the overlying portions of said sealing
into closure forming position and holding the
strip into closure-forming position, holding the
outermost of said ?aps in said position while the
outermost of said ?aps in said position, and de
air pressure within the container presses said
livering compressed air into the body of said con
?aps into intimate inter-engagement, said seal
ing strip serving to prevent the escape of com 50 tainer through said ?lling opening so as to cause
said compressed air to press said flaps into in
pressed air into the zones of inter-engagement
between said ?aps.
timate, adhesively secure interengagement, said
sealing strip serving to resist passage of com
6. The method of closing a container embody
pressed air into the zones of interengagement be
ing a tubular body having one end closed and
provided with a ?lling opening and its other end 55 tween said ?aps.
FRANK D. PALMER.
provided with adhesive bearing flaps adapted to
be folded into mutually overlapping, adhesively
interconnected relation in closure forming posi
tion on said other end'of the body, which con
REFERENCES CITED
The following references are of record in the
sists in delivering compressed air into the loody 60 ?le of this patent:
of the container through said ?lling opening,
UNITED STATES PATENTS
then folding said ?aps into closure forming posi
Number
Name
.
Date
tion and holding the outer-most of said flaps in
1,634,073
Labombarde ______ __ June 28, 1927
said position while the air pressure within the
Bergstein ________ __ Mar. 23, 1937
container presses said ?aps into intimate inter 65 2,074,357‘
2,419,991
Dunning __________ __ May 6, 1947
engagement, and coating the container inside
and out with water proo?ng material.