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Патент USA US2104969

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Jan. 11, Í938.
' Filed Jan. 4, 1955
Patented Jan. 11, 1938
e“ i»,
Martin Burger, Morris, Ill.,.assignor to Self-Lock
ing Carton Co., Chicago, Ill., a corporation of
Application January 4, 1935, Serial No. 325
1 Claim.
The present invention pertains to cellular car
tons of the type customarily employed for hold
ing fragile articles such as eggs, and has par
ticular reference to an improved construction
»"5 for the production of cartons of the so-called
3 X 4 style.
Egg cartons are of two general types. As an
example of the first type, reference is made to
Troyk Patent No. 1,766,155. This carton is of
l0 the 2 X 6 type, in which the eggs are placed in two
adjacent rows separated by a longitudinal par
tition. The eggs are supported above a surface
` upon which the carton is positioned by means of
a cushion bottom. The other type of egg carton
is of the so-called 3 X 4 type, in which a flat bot
tom box is provided with a separate cellular ñller
consisting of strips secured together in foldable
relation to provide twelve compartments, three
along one dimension of the carton and four along
20 the other.
A principal object of the present invention is
to >provide a one-piece 3 X 4 carton which is
manufactured easily and provided with a cushion
525 An additional object is the provision of a car
ton having the combined advantages of the two
types of cartons known heretofore.
A further object is the provision of a 3 X 4 car
ton in which is employed a minimum quantity of
go material and at the same time a cushion bottom
is provided.
These and other objects will be evident upon
consideration of the following specification, in
which is described a preferred embodiment of
"3‘5 my invention and by reference to the accom
«panying drawing, in which
Fig. 1 is a perspective view of a 3 X 4 carton
constructed in accordance with my invention,
the carton being shown in erected or set-up con
40 dition;
Fig. 2 is a longitudnal section taken along line
2-2 of Fig. 1;
Fig. 3 is a fragmentary top view of the carton
taken along line 3_3 of Fig. 4; and
Y1.1.5 Fig. 4 is an end View of the carton.
. As is stated hereinbefore, the usual style of
3 X 4 carton which has met with commercial
success consists of a iiat bottom carton having a
separate ñller or insert which may be distended
50 from collapsed condition into rectangular shape
in which the ñller provides twelve cellular com
partments, three along one dimension of the car
ton and four along the other. 'I'his style of car
ton olîers some competition to the more desira
55 ble 2 X 6 carton of the type described in the be
(Cl. 229-29) '
forementioned Troyk patent. However, it has
been necessary to sell the 3 X 4 carton at several
dollars a thousand less than the 2 x 6 carton.
The inability to obtain a better price for the
standard 3 X 4 carton is primarily due to the fact 5
that the carton is not rigid, that is, it can be
twisted easily, and also the carton does not pro
vide a cushion bottom for the prevention of
breakage of eggs. So great has been the objec
tion to this style of 3 x 4 carton that it has not l0
been used for shipping purposes. On the con
trary, the standard 3 X 4 carton ordinarily is used
by the retailer for dispensing eggs from the
In the prior art, attempts have been made to 15
provide a cushion style 3 X 4 carton, but these at
tempts have met with failure and no such car
tons are on the market. A principal example of
such prior attempts to provide a cushion bottom
3 X 4 carton is to be had in the carton described 120
in Wilson Patent No. 905,615, issued December 1,
1908. In this Wilson patent a blank is folded in
the form of a series of V-shaped channels sep
arated from each other by longitudinally extend
ing ridges. The egg-receiving channels are di- 1725
vided up into a plurality of cellular compart
ments by separated inserts, which extend trans
versely through the blank and are locked to the
outside walls thereof by means of hooks.
In accordance with my invention I have pro- ’30
vided a 3 X 4 carton in which is combined the ad
vantages of this type of structure, as well as the
advantages of the cushion bottom 2 X 6 cartons
known heretofore. As shown in the drawing, the
carton is constructed by suitably cutting, scor
ing and folding a single blank of paper board
or the like to form cover-locking hooks III, a
cover-locking strip I I, and a cover portion I3 sep
arated from the strip I I by means of a score line
I2. 'I’o the opposite end of cover I3 is integrally '§40
attached a rear wall I5, separated from the cover
by means of a score line I4.
A rear bottom sec
tion I'I is connected to the wall I5 along a score
line I6 and extends upwardly and inwardly to
ward the center of the carton, as shown particu- 45
larly in Fig. 4. This rear bottom section I1 ter
minates at a division point of about one-third
the width of the carton, and then extends down
wardly from score line I8 to form the rear side
I9 of an intermediate V-shaped channel. 'I‘he 50
section I9 extends downwardly to the level of the
bottom of the carton at the center of the carton,
and is joined at a certain score line 2U by an
upwardly and outwardly slanting front section
2| of the intermediate V-shaped channel. 'I‘his 55
front section 2| of the intermediate channel is
conditions with the surprising result that no eggs
joined along score line 22 by a front bottom sec
tion 23 which extends downwardly and is joined
are broken, even though, as will be seen from
along a score line 24 to a front wall 25.
A series of cross partitions 26 are joined to the
front wall 25 by means of integral triangular
tabs or hinge portions 21. The opposite upper
edges of the cross partitions likewise are pro
vided with triangular tabs or hinge vportions 28
10 which secure the cross partitions to an attaching
strip 29.
the drawing, eggs placed in the carton do not
have paper material between their widest por
It will be seen from Fig. 4 that wall 2| has
a greater angle to the horizontal than does wall
|`| and likewise I9 has a greater angle to the
horizontal than does wall 23. This relation tends
to cause the eggs in the outer longitudinal chan
. nels to spring away from the center of the car
In manufacture, the blank from which the. ton, thereby protecting the eggs against con
carton is produced is properly cut and scored.V
Thereafter the blank is folded along the score
tact with the eggs in the central longitudinal
channel or compartment.
Opposite the _lower projections 37 on the cross
partitions are provided cover-protecting projec
30 is provided longitudinally of the cross parti
tions and in the central portion thereof and tions 38 which extend upwardly adjacent the
the cross partitions are folded along the'score >under side lof the cover and press or protect the
line. A suitable quantity of glue is applied _to the latter against blows or jars. It will be seen that
attaching strip 29 and the latter is pressed against when pressure is applied to the cover this pres
the lbottom wall to complete the assembly of the sure is transferred through the cross partitions
to the downwardly slanting walls I9 and 2|. As
In accordance with my invention the bottom the hooks 33 and 35 are spaced apart a consider
able distance, it is possible to construct the up
section is provided with three longitudinally ex
tending V-shaped channels separated from each per cover-supporting projections 38 with a sub
other rby upwardly extending ridges, and this stantial quantity of material. That is, the cov
er-supporting projections 38 extend beneath the
bottom is locked in secure relation with the cross
partitions in such a manner that the bottom is carton for a distance greater than the width of
rigid. In the embodiment of my invention shown the central channel.
in the drawing the cross partitions are provided
As stated hereinbefore, the carton is constructed
and shipped in collapsed condition by folding
with outer downwardly extending rprongs 3| ad
the body portion -along score lines 29 and 3€). The
jacent the rear of the carton and similar down
wardly extending prongs 32 adjacent the front carton is easily erected by the use of a suitable
wall of the carton. Prongs 3| are provided with block which acts to rotate the cross partitions
inwardly facing hook portions 3S which extend from their collapsed horizontal position into erect
through openingsr34 in the rear bottom section position at right angles to the bottom section
|`| and engage this section to maintain the and walls of the body portion of the carton. By
same in suspended condition. Similar hooks 35 grasping the bottom of the carton along the con
are provided on the front prongs 32 and these
tiguously positioned walls IS and 2|, the bottom
hooks engage the front bottom section 23 through of the carton may be pressed into interlocking
openings 36. When eggs are placed in the outer engagement y’with the hooks 33 and 35 without
channels of the carton the sections |‘| and 23 difficulty, since the walls I9 and 2| afford a con
tend to be pressed toward the inner portion of venient outwardly extending handle.
the carton. To maintain the central channel
While my invention has been described with
in proper shape-I have provided downwardly .particular reference to a preferred embodiment
extending projections 31 on the central portion thereof, it will be understood that changes and
of the cross partitions, and these projections 3'| variations from the described structure are pos
ñt against the downwardly extending walls I9 ysiblev without departing from the spirit of the
and 2| of the intermediate longitudinal channel. invention, and all such modiiications are intended
15 line 20 of the intermediate channel. A score line
It will be seen that my carton does not em
ploy longitudinal partitions of the type used here
tofore. That is, in the 2 x 6 cartons known
heretofore the ridge portion which divides the
carton into two longitudinal sections of cells ex
55 tends upwardly above the center of eggs placed
Vin the carton, whereby to prevent the eggs from
comingV in contact with each other, it being
thought that such a longitudinal partition was
necessary to prevent the eggs from breaking.
However, it has-been my discovery that when
the bottom section is constructed as described
herein it is not necessary that the partitions be
tween the longitudinally extending cells extend
upwardly above the center of the eggs. In fact,
65 cartons of the type described herein have been
packed with eggs and shipped under adverse
„to be included inthe appended claim.
A carton of the type described, comprising front
and rear walls, cross partitions hinged to the up
per portion of said walls, a bottom portion hav
ing inwardly and upwardly inclined outer sec 55
tions and downwardly and inwardly inclined in
termediate sections forming three longitudinal
channels, means for supporting said bottom to
4said cross partitions, downwardly extending pro
jections on the central portion of said cross par
.titions engaging the intermediate sections of said
bottom portion, and upwardly extending cover
rengaging projections opposite said downwardly
extending projections.
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