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Патент USA US3059837

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Oct. 23, 1962
Filed Jqly 11. 1958
3 Sheets-Sheetv 1
60 6/
William W McGimpsay
Ernesf C. Pellafon
Louis J. Saffares
Oct. 23, 1962
Filed July 11, 1958
5 Sheets-Sheet 2
F i g. 6
4.2J lg
5H5)’;J. s'crfforesps
521's???” 5y
Oct- 23, 1962
Filed July 11, 1958
3 Sheets-Sheet 3
; e a on
W McGimpsey
Louis J. Saffores
United States tidatent
Ernest C. Pellaton, Larkspur, William W. McGimpsey,
Albany, and Louis J. Sa?ores, Novato, Caliti, assign
ors to Fibreboard Paper Products Corporation, San
Francisco, Calif., a corporation of Delaware
Filed July 11, 1958, Ser. No. 748,018
1 Claim. (Cl. 229-—17)
Patented Oct. 23, 1962
a plurality of carton body panels secured in side-by-side
relationship. Such body panels include an end wall panel
4 hingedly connected along fold line 6 to side wall panel
8, which in turn is connected along fold .line 10 to an
other end wall panel 12. End wall panel v12 also is
hingedly connected along fold line 14 to another side Wall
panel 16.
Desirably all the side wall panels and end wall panels
The present invention relates to easily openable and 10 are of substantially the same length but side Wall panels
8 and 16 desirably are of greater width than end wall
reclosable cartons of foldable ?exible material, such as
panels 4 and 12 so that an elongated rectangular con?g
paperboard and the like.
uration is imparted to the carton when the same is fully
More particularly, the present invention relates to a
paperboard carton which includes end closure structure
Hingedly connected to side wall panel 16 along fold line
for the carton body comprising cover ?aps which cooperate
18 is glue panel 20, which desirably is adhesively secured
to provide an access opening or pour spout of predeter
to the inner face of end ‘wall panel 4 when the carton is
mined size and con?guration through which the contents
erected in the conventional manner. A series of bottom
of the carton may be removed, said access opening being
end closure ?aps 22, 24, 26 and 28 are hingedly con
automatically opened when a cover ?ap of the closure
structure is pulled from engagement with the remainder 20 nected along fold lines 36, 32, 34 and 36, respectively, to
the respective end wall and side wall panels which com~
of the closure structure. The closure structure of the
the foldable blank. When the carton is erected, the
present carton also includes means for rapidly and easily
bottom end closure panels 22, 24, 26 and 28 are secured
reclosing the carton with a snap lock reclosing action to
together in overlapping relationship in any conventional
protect the unused contents of the carton.
such as ‘with adhesive or other suitable fastening
Accordingly, the objects of the present invention, among
others, include the provision of an easily opened carton
End closure structure is provided at the end of carton
end closure structure including a severable tear-out section
2 opposite from the series of bottom closure ?aps
which provides an access opening or pour spout through
for providing the top closure for the erected carton.
which contents of the carton may be easily removed in
any desired quantity; the provision of closure structure 30 Such top end closure structure includes cover tabs 40
and 42 hingedly connected along respective fold lines 44
including means for rapidly and easily reclosing the car
45 to the upper margins of end wall panels 4 and 12,
ton to protect the unused carton contents remaining in
respectively. These cover tabs may be provided with
the carton; the provision of means whereby such carton,
predetermined ‘areas A for the reception of a suitable ad
after having been reclosed, may subsequently be reopened;
hesive during the closing operation. Cover tabs 40 and
and the provision of closure structure wherein only a
‘42 are shown as being substantially rectangular in con?g
predetermined portion of one cover flap thereof is severed
uration, but other suitable shapes may be employed also.
during the opening operation so that the other cover
Tabs 40 and 42 have free outer edges ‘46 and 47 respec
?ap is maintained undamaged and intact.
tively which, when the carton is closed, face each other
These and other objects will become apparent from
reading the following speci?cation, reference being taken 40 in opposing relationship as will be described later.
Cover ?aps 48 and 50, which cooperate with cover
to the accompanying drawings, in which:
tabs 40 and 42 to provide the end closure structure of the
FIG. 1 is a plan view of a foldable blank from which
carton, are hingedly connected along fold lines 52 and
the present carton may be erected;
54 to the upper margins of side walls panels 8 and 16
FIG. 2 is an end view on a slightly reduced scale, of
the top of an assembled carton in ?attened condition for
Adjacent cover tabs and cover flaps are separated
shipment and storage;
from each other by inwardly extending cuts C which pro
vide four individual closure members which may be
folded inwardly over the carton contents independently
FIG. 4 is an isometric view illustrating the manner in
50 by each other when the carton is closed.
which the end closure structure is closed;
Desirably, cover tabs 40 and 42 and cover ?aps 48
FIG. 5 is an isometric view of the carton completely
50 substantially correspond in width to their asso
ciated end wall ‘and side wall panels. In addition, cover
FIG. 6 is a sectional view of the closed carton taken
tabs 40 and 42 and cover flap 50 desirably are of equal
in the plane of line 6——6 of FIG. 5;
FIG. 7 is an isometric view illustrating the manner in 55 length while cover flap 48 is of shorter length than any
of these so that the outer free edge 56 thereof is posi
which the cart-on is opened to provide an access opening
tioned inwardly of the free edges 46, 47 and 58 of the
or pour spout.
respective tabs 40 and 42 and ?ap 50.
FIG. 8 is an isometric view of a reclosed carton;
Extending freely outwardly from and projecting beyond
FIG. 9 is a sectional view of the reclosed carton taken
60 free outer edge 56 of cover ?ap 48 is a tab member 60
in the plane of line 9-9 of FIG. 8;
which is intended for the dual purpose of providing a
FIG. 10 is a plan view of part of a foldable blank from
carton opening pull tab as well as reclosure tab means
which a ‘modified carton may be erected;
for an erected carton as will be discussed hereinafter.
FIG. 11 is an isometric view of the modi?ed carton
Tab 60 has an outer edge 61 which is in substantial align
with t -e end closure structure partially closed;
FIG. 12 is an isometric view of the modi?ed carton with 65 ment with outer edges 46, 47 and 58 of the closure tabs
4% and 42 and ?ap 50. Tab 60 is hingedly connected to
the end closure structure fully closed;
closure ?ap 48 along fold line 62 which desirably is a
FIG. 13 is an isometric view illustrating the manner in
which either of the disclosed embodiments may be re
substantial continuation of the outer free edge 56 of clos
closed with a snap lock reclosing action.
ure ?ap 48. The opposite side edges 63 of tab 60 con
~ Taking reference ?rst to the carton blank 2 of FIG. 1, 70 verge toward outer edge 61 from fold line 62.
such blank may be formed from any suitable flexible and
Closure ?ap 50 has formed therein an elongated out 64
FIG. 3 is an isometric view of an erected carton hav
ing the end closure structure thereof open;
foldable material, desirably paperboard. Blank 2 includes
which extends in the same general direction as the outer
secured to the under surface of ?ap 48, automatically is
torn from ?ap 50 and remains in engagement with ?ap 48
free edge 58 of such closure flap, but is spaced a sub
stantial distance inwardly from such edge. Cut 64 de
sirably includes a straight central portion 66, which ex
tends substantially parallel to outer edge 58, and two
small opposite portions 68 and 70 which diverge out
and moves therewith when ?ap v48 is moved about hinge
line 52 to thereby provide an access opening or pour spout
74 through which the contents of the carton may be re
As shown in FIG. 7, severable section 72 of ?ap 50
wardly from opposite ends of central portion 66 towards
outer edge 58.
Elongated cut 64 de?nes part of the boundaries of a
severable tear out section 72 provided in closure ?ap 50.
desirably is positioned to overlie the space existing between
the opposing edges 46 and 47 of the cover tabs 40 and 42
so that the access opening 74 which is provided is of sub—
Severable section 72 is spaced from fold line 54 which
de?nes the hinged connection between ?ap 50 and side
stantially rectangular con?guration and is de?ned partially
by such opposing edges and partially by the untorn por
wall 16 and is adapted to be torn out Iwhen the carton is
tion of ?ap 50 which is outlined by the cut 64. The re
mainder of access opening 74 is defined by the side wall
After the carton has been erected in any conventional 15 8 of the carton. However, it should be understood that
the respective tab and flap dimensions of the end clo'
manner to the open ended condition shown in FIG. 3
sure structure may be modi?ed to suit a particular need so
and the contents ?lled therein, the end closure structure
that, if desired, the entire access opening could be de?ned
of the carton top maybe closed in the following manner:
entirely ‘by a tear out portion of flap 50.
As shown in FIG. 4, closure tabs 40 and 42 are folded
After the carton has been opened as shown in FIG. 7,
inwardly to lie with their free outer edges 46 and 47 in
the contents thereof, which may be granular material,
opposing spaced relationship. Thereafter, cover flap 50
such as granulated or powdered sugar, baking powder or
is folded inwardly to overlie tabs 40 and 42 and is secured
the like, or chunk style products, such as raisins and the
thereto by any suitable means, preferably adhesive. For
like, may easily be poured from the carton through access
this purpose appropriate adhesive may be applied to ad
initially opened, as will be described. Cut 64 facilitates
initiation of such tearing.
opening 74 into an appropriate receptacle.
Tab 64) is not intended solely for the carton pull opene
ing function described previously. Such tab performs a
hesive areas A on the cover tabs to effect such securing.
It should ‘be noted that severable section 72 overlies the
space between tabs 40 and 42 and partially closes the
dual function in that it also provides carton reclosure
means which is engageable in the access opening 74 to
facilitate reclosure of the car-ton to protect the unused con
Thereafter, the other cover ?ap 48 is folded to overlie
cover ?ap 50 and is secured thereto. Desirably a suit
able adhesive area A is applied within the boundaries
of the severable section 72 and it is by means of such
adhesive that overlying cover ?ap 48 is adhesively secured
to underlying cover ?ap 50.
tents thereof.
To reclose the carton, it is merely necessary to pivot
cover ?ap 48 about its fold line 52 until it again overlies
cover ?ap 50. Thereafter, by applying ?nger pressure in
Cover ?ap 48 need not
otherwise be secured to cover ?ap 50, but if desired other
the area overlying access opening 74 in a direction sub
light adhesive areas on opposite sides of severable sec
tion 72 may be provided to secure the outer ends of the
stantially normal to refolded ?ap 48 (see FIG. 13), the
respective overlying and underlying flaps together to
position illustrated in FIGS. 8 and 9. In this connection,
provide a more securely closed carton. Normally, how
it is not necessary to twist or deform ?ap 48 in that tab
tab 641‘ may be urged into the access opening 74 to the
ever, such additional adhesive areas are not necessary 40 6%} is inserted into such opening with what may be termed
a snap-lock reclosing action which automatically locks
the carton reclosed. Tab 60, upon application of such
?nger pressure, ?rst is bent outwardly about fold line 62
until suf?cient room is provided for the tab to snap auto
matically beneath cover flap 50. Because the carton is
formed from ?exible material, ?ap 50 is capable of giving
inwardly a su?icient amount until the edge 61 of bent
tab 61!} clears the edge of access opening 74 de?ned by
and the end closure structure is more easily opened if
adhesive is applied only within the area de?ned by the
severable section 72.
When the carton is completely closed, the end closure
structure appears as shown in FIGS. 5 and 6 with cover
?ap 50 overlying cover tabs 40 and 42 and with cover
?ap 48 overlying cover ?ap 50. Carton erecting and
closing may be done by hand but desirably is carried out
on automatic packaging machines which ?ll and close
‘large numbers of cartons rapidly and automatically.
It should be noted that dual purpose tab 60 extends
freely beyond the associated edge 56 of cover ?ap 48.
‘Desirably, respective ?aps 48 and 50 are so dimensioned
that tab 60 terminates with its outer edge 61 within the
con?nes of the end closure structure. That is, tab 60
does not extend laterally beyond the plane of side wall 16.
Tab 60, however, does extend beyond the boundaries of
severable section 72 to facilitate carton opening. A
neatly closed carton results which has no projections
which might accidentally be engaged to effect carton
cut 64 so that the tab may snap beneath ?ap 50.
Fold line 62 of tab 60 enhances controlled bending of
the tab and facilitates reclosing of the carton. By provid—
ing a preformed fold line about which tab 60 is bendable,
unnecessary damage to the tab or the cover ?aps is pre
cluded so that the carton may be reclosed and reopened
numerous times until the contents are completely used.
In this connection, a sturdy carton reclosure structure
is provided which protects the unused contents of the car
ton and substantially precludes leakage therefrom. Be
cause the severable section 72 which is torn out when
the carton structure is opened remains in contact with the
under-surface of the closure ?ap 48, such severable section
Tab 60 desirably is not adhesively or otherwise secured
substantially ?lls the opening in flap 50' when the carton
to the underlying cover ?ap 50, but merely overlies the
is reclosed and precludes leakage as much as possible.
same and extends substantially parallel thereto to provide
The reclosed carton is securely closed in that, as shown
a separate carton ply or tongue which is co-planar with 65
in FIG. 8, the free edge 56 of closure ?ap 50 is in sub
cover ?ap 48 so that it may easily be grasped to effect
stantial alignment with the inner edge of access opening
carton opening. If desired, tab 60 may be lightly secured
74 de?ned by the elongated cut 64 provided in ?ap 50.
to ?ap 50 to hold it in place during shipment, but such an
In this manner, the two cartons are fully inter-engaged
expedient is not required.
70 with the converging edges 63 of tab 60 contacting with
To open the en-d'closure structure, it merely is required
a saw type locking action the side edges of access opening
to grasp tab 60 and to raise the same as shown in FIG. 7,
74 de?ned by the diverging portions 68 and 70 of cut 64.
thereby disengaging closure ?ap 48 from closure ?ap 50
and the remainder of the closure structure.
Upon so
While the tab 60 underlies ?ap 50 as described, the re—
doing, severable tear out section 72, which is adhesively 75 mainder of the ?ap 48 overlies ?ap 50w.
To insure proper inter-engagement of tab 60 and flap
50, cut 64 is positioned in ?ap 50 so that central portion
66 of such cut is spaced a distance from side wall 8, when
the carton is closed, which is substantially equal to the dis
tance of free edge 56 of ?ap 48 from the fold line 52
which connects such ?ap to side wall 8. That is, taking
reference to FIG. 5, edge 56 and fold line 62 in ?ap 48
substantially overlie and are substantial continuations of
be easily and rapidly opened with a minimum of destruc
tion to the cover flaps thereof. Such minimum destruc
tion is limited solely to the underlying of the two cover
?aps which ‘comprise the closure structure. That is, as
shown in FIG. 7, the overlying cover flap of the closure
structure is not torn or otherwise destroyed during the
opening operation. As a result, the carton retains its
original shape after being opened. Such carton also re
the central portion 66 of cut 64 so that the entire tab 60
tains its original strength in that the overlying ?ap 48 is
will be insertable beneath ?ap 50 when the carton is re 10 undamaged and is fully effective .when the carton is re—
closed as shown in FIG. 8.
To reopen the car-ton after it has been reclosed, it
As shown in FIG. 2, both carton embodiments of this
merely is necessary to grasp ?at 48 at opposite side edge
invention, after glue panel 20 has 'been adhesively secured
portions 76 and 78 (FIG. 8) and raise the same until
to end wall panel ‘4, may be folded into a two ply ?at
tab 60 is pulled free from beneath ?ap 50‘. During such 15 tened carton for shipment or storage. In such ?attened
reopening operation, tab 60 is bent downwardly along
condition, the opposite carton ends are open. Such ?at
fold line 62 thereby precluding damage to either the tab
tened carton may be easily erected to open tubular shape
or the ?ap. As a result, the carton may be opened and
by pressing inwardly on the opposite edges thereof de~
closed numerous times until the contents are exhausted.
?ned by fold lines 6 and ‘14. When in such open tubular
When severable section 72 is ‘of substantially small size, 20 shape, the top and bottom ends may be closed as de
no additional weakening means is required to effect tear
ing out of such section during the opening operation in
that ?ap 50 is torn along substantially straight lines
which start at opposite ends of cut 64 (FIG. 7).
However, when an access opening or pour spout of sub
stantially large size is desired, so that a spoon or other
measuring instrument may be inserted directly into the
carton for withdrawing measured amounts ‘of the contents
therefrom, additional means for weakening the cover flap
scribed previously.
While two desirable embodiments of the carton have
been described herein, other constructions embodying
the invention may become apparent to‘ those skilled in
the art. However, the present invention should not be
limited by the foregoing description, but should be inter
preted in light of the following claim.
We claim:
A container comprising four connected walls forming
50 to facilitate proper and neat tearing out of the sever 30 a rectangular carton consisting of oppositely disposed
able section is desirable. As shown in FIGS. 10 to 13, a
side walls and end walls extending equidistant with one
carton modi?cation is provided which includes such addi
another to provide an open end, a pair of end wall clo
tional weakening means.
sure cover tabs, one of said tabs being foldably connected
With reference to the blank of FIG. 10, spaced lines
to each of said end walls adjacent said open end and
of weakness 80 and ‘82, desirably in the form of perfo—
being substantially the same width as said end wall and
rations, are provided in cover ?ap 50 which extend from
being infolded and extending toward each other a short
opposite ends of the elongated cut 64 in substantially
distance so that a substantial space is left between the
parallel relationship to the edge '58 of the cover ?ap.
free ends of said tabs, said tabs having on their outer
In such modi?cation, cut 64 is positioned adjacent fold
side a predetermined area covered with adhesive, a ?rst
line 54 and spaced therefrom a distance suf?cient to 4-0 rectangular cover ?ap foldably connected to one of said
allow dual purpose pull tab 60‘ to snap under ?ap 50
side walls adjacent said open end and having an outer
when the carton is to be reclosed after initial opening.
free edge and being substantially the same width as said
In this manner a severable section 72, the boundaries
side wall and extending toward said oppositely disposed
of which are de?ned not only by the elongated cut 64,
side wall a distance substantially short thereof to leave
but also by the parallel perforated lines of weakness 8t) “ a space therebetween and contactingly overlying each of
and 82, is provided which may be neatly and easily torn
said tabs and permanently secured thereto by the said
out to facilitate opening of the carton to provide a large
adhesive, said ?rst cover flap having an elongated slit
access opening in the end thereof. Such access opening
therein spaced a substantial distance inwardly from its
is de?ned by severable section 72 and extends almost the
outer free edge, the outer side of said ?rst cover flap
full distance across the carton end structure as shown in
between said cut and free outer edge which is substan
FIG. ‘11. Reference numeral 84 is applied to FIG. 11
tially the area thereof de?ned between the free edges
to identify the access opening resulting when section
of the tabs only being covered with adhesive which ex
72 is removed.
tends between said cover tabs, a second cover flap fold
While similar lines of weakness may be provided in
ably connected to the opposite side wall adjacent said
the somewhat smaller carton embodiment of FIGS. 1 to
open end and being substantially the same width as the
9, desirably such lines of weakness are omitted from this
side wall and extending toward said one side wall a dis
tance substantially short thereof to leave a space there
embodiment. Because cut 64 in the embodiment of
between and contactingly overlying a subjacent portion
FIGS. l-9 is relatively close to edge 58 of cover ?ap 50,
of the ?rst cover ?ap and being removably secured to
accidental opening of the carton due to unexpected forces
only a medial adjacent portion of its inner side thereof
which may be applied thereto during shipment and han
by said adhesive on said ?rst cover ?ap, the inner sur
dling might be possible if such lines of weakness were
faces of lateral portions on each side of said medially
located adjacent portion of said second cover ?ap being
In other respects the carton modi?cation of FIGS. 10
free and unsecured with respect to the outer adjacent
to 13 is substantially the same as the carton embodiment
outer surfaces of the ?rst cover ?ap, a dual purpose
of FIGS. 1 to 9, and similar reference numerals are used
tab of substantially the width of the slit in the ?rst
for similar parts. As noted in FIG. 12, the pull-tab
cover ?ap integral with, and extending beyond the outer
60 in this modi?cation also terminates within the con
free edge of said second cover ?ap midway between its
?nes of the end closure structure. The carton of FIGS.
opposite edges beyond and exteriorly of said cut and
10—13 is opened and reclosed in the same manner de
resting freely on and terminating short of the connection
scribed previously with the easy reclosing operation being
of the ?rst cover ?ap, the combined length of the second
illustrated in FIG. 13.
?ap and pull tab being no greater than the length
While the present carton end closure structure is quite
?rst cover ?ap, the pull tab when grasped and
simple in construction, a carton is provided which may
75 pulled outwardly will result in that portion of the ?rst
References Cited in the ?le of this patent
cover ?ap with the adhesive being completely ripped
therefrom and forms a dispensing opening in the ?rst
cover flap and is completely removed and carried by the
second cover ?ap away from the dispening opening, and
a free end edge of the opening being of a width substan
tially that of the width of the pull tab inwardly of a
marginal portion of the ?rst cover flap, the pull tab being
insertable under the said end edge of the opening in the
?rst cover ?ap to reclose the container, and means clos
ing the other end of the carton.
Byrne ______________ __ Mar. 19, 1912
Weiss _______________ __ Dec. 25, 1934
Guyer ______________ __ Mar. 21, 1939
Great Britain _________ _._ J an. 14, 1953
Ranko et a1. __________ __ July 18, 1939
Ellsworth _____________ __ Sept. 8, 1953
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