U.S. patent number 3,700,161 [Application Number 05/054,997] was granted by the patent office on 1972-10-24 for flat foldable carton having a preformed, anchored in place, and folded bottom, with self-locking top.
This patent grant is currently assigned to Michigan Carton Co.. Invention is credited to Patrick L. Bundy.
United States Patent |
3,700,161 |
Bundy |
October 24, 1972 |
FLAT FOLDABLE CARTON HAVING A PREFORMED, ANCHORED IN PLACE, AND
FOLDED BOTTOM, WITH SELF-LOCKING TOP
Abstract
A carton is provided which may be prepared from an integral
blank and which when properly glued together, may be stored in flat
folded condition. The folded carton may be quickly erected to form
a carton in the form of a polygonal prism having a closed bottom
and another end which is readily closable by interlocking a
plurality of flaps.
Inventors: |
Bundy; Patrick L. (Battle
Creek, MI) |
Assignee: |
Michigan Carton Co. (Battle
Creek, MI)
|
Family
ID: |
21994903 |
Appl.
No.: |
05/054,997 |
Filed: |
July 15, 1970 |
Current U.S.
Class: |
229/110;
229/120 |
Current CPC
Class: |
B65D
5/06 (20130101); B65D 5/48024 (20130101) |
Current International
Class: |
B65D
5/02 (20060101); B65D 5/49 (20060101); B65D
5/06 (20060101); B65D 5/48 (20060101); B65d
005/36 () |
Field of
Search: |
;229/41B,41C,39,37 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Moorhead; Davis T.
Claims
I therefore particularly point out and distinctly claim as my
invention:
1. A carton in the form of a hexagonal prism having six side
panels, and a bottom closure for said carton, said bottom closure
comprising:
a. a hexagonal bottom panel being connected at one edge to the end
of one of said side panels and having substantially the same
dimensions and shape as the cross-section of said carton, and
b. two supporting flap assemblies disposed one immediately on each
side of the side panel to which said hexagonal bottom panel is
connected and below said polygonal bottom flap, each of said
assemblies comprising:
1. a first supporting flap hingedly connected to the end of one of
said side panels,
2. a second supporting flap hingedly connected to the end of an
adjacent one of said side panels comprising a supporting flap
member and a glue flap member hingedly connected thereto,
3. said second glue flap being adhesively affixed to a medial
portion of said first supporting flap and said first supporting
flap having an overhanging portion (70a, 79a) extending beyond the
hinge line between said supporting member and said glue member and
positioned over said second glue flap, thereby strengthening
vertical support of said flap assembly, and
4. one of said side panels being free of flap attachments at its
lower edge,
the arrangement being such that each supporting flap assembly folds
inwardly at the hinge line between said hinge member and said flap
member permitting said bottom closure to be folded flat with the
remainder of said carton for storage, and whereby when said carton
is erected and said bottom closure is placed in planar position
said overhanging portion (70a, 79a) abuts the upper surface of said
supporting flap member, thereby restraining said flap assembly from
bending outwardly of said carton, and providing positive support
for said hexagonal panel.
2. A carton according to claim 1, wherein said hexagonal bottom
panel is provided at its forward edge with a tab disposed at
substantially a right angle thereto and engaging one of said side
panels, thereby stabilizing and restraining said bottom panel.
3. A carton according to claim 1, wherein each of said supporting
flaps (1) is trapezoidal in shape, wherein each of said glue flap
members is triangular, and wherein the supporting flap member of
said second supporting flap has an arcuate edge.
4. A carton according to claim 1, wherein the top of said carton is
provided with a closure comprising a plurality of closure flaps
hingedly connected to the ends of said side panels and
interconnected laterally to form a closed loop, each of said
closure flaps comprising a flap member and a triangular web
hingedly connected thereto, said flap members and said webs each
having an edge perpendicular to the hinge line connecting said flap
members and said side panels and another edge oblique thereto, the
oblique edges of said flap members and said webs being hingedly
connected together, and the perpendicular edges of said flap
members and triangular webs being connected to the perpendicular
edges of webs and flap members, respectively, of adjacent closure
flaps, the oblique edges of said flap members passing through the
center of said closure when said flap members are in closed
condition, said flap members terminating in an arcuate tab
extending beyond the center of said closure.
5. An integral blank for forming a carton in the form of a
hexagonal prism having at least six side panels, and a bottom
closure for said carton, said bottom closure comprising:
a. a hexagonal bottom flap being connected at one edge to the end
of one of said side panels and having substantially the same
dimensions and shape as the cross-section of said carton,
b. two supporting flap assemblies disposed one on each side of said
hexagonal bottom flap, each of said assemblies comprising:
1. a supporting flap hingedly connected to the end of one of said
side panels,
2. a second supporting flap hingedly connected to the end of an
adjacent one of said side panels comprising a supporting flap
member and a glue flap member hingedly connected thereto, and
3. said glue flap being adapted to be adhesively affixed to a
medial portion of said first supporting flap and said first
supporting flap having an overhanging portion extending beyond the
hinge line between said supporting member and said glue member when
said carton is erected, and
c. one of said side panels being free of flap attachments at its
lower edge,
the arrangement being such that in the erected condition each
supporting flap assembly folds inwardly at the hinge line between
said hinge member and said flap member permitting said bottom
closure to be folded flat with the remainder of said carton for
storage, and whereby when said carton is erected and said bottom
closure is placed in planar position said overhang abuts the upper
surface of said supporting flap member, thereby restraining said
flap assembly from bending outwardly of said carton, providing
positive support for said hexagonal flap.
6. An integral blank according to claim 5, wherein said hexagonal
bottom panel is provided at its forward edge with a tab adapted to
be disposed at substantially a right angle thereto and to engage
one of said side panels, thereby stabilizing and restraining said
bottom panel.
7. A carton according to claim 5, wherein each of said supporting
flaps (1) is trapezoidal in shape, wherein each of said glue flap
members is triangular, and wherein the supporting flap member of
said second supporting flap has an arcuate edge.
8. An integral blank according to claim 5, wherein the top of said
carton is provided with a closure comprising a plurality of closure
flaps hingedly connected to the ends of said side panels and, when
glued, interconnected laterally to form a closed loop, each of said
closure flaps comprising a flap member and a triangular web
hingedly connected thereto, said flap members and said webs each
having an edge perpendicular to the hinge line connecting said flap
members and said side panels, and another edge oblique thereto, the
oblique edges of said flap members and said webs being hingedly
connected together, and the perpendicular edges of said flap
members and triangular webs being connected to the perpendicular
edges of webs and flap members, respectively, of adjacent closure
flaps, the oblique edge of said flap members adapted to pass
through the center of said closure when in closed condition, said
flap members terminating in an arcuate tab extending beyond the
center of said closure when in said closed condition.
Description
BACKGROUND OF THE INVENTION
The invention deals broadly with foldable boxes or cartons, and
more particularly refers to such cartons which may be erected into
polygonal and preferably hexagonal prism form having one closed end
and another which is readily closed and locked.
Polygonal and particularly hexagonal cartons have been disclosed in
the art, but because of their form, they are generally not able to
be folded flat for storage. However, even where collapsible
hexagonal cartons have been provided, the strength and rigidity
particularly of the bottom end are not sufficient for containing
such articles as parts of fried chicken. Such items are generally
placed in bucket-type paper cartons which are not foldable, and
therefore require a considerable amount of storage space.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a
carton which can be glued and erected in the shape of a polygonal
and preferably hexagonal prismatic form.
It is a particular object of the invention to provide a bottom for
the carton which, although it may be folded flat for storage, it
can be readily set up to provide a strong, full bottom which
additionally aids in retaining the polygonal shape of the
carton.
It is still further an object to provide a carton having such a
bottom which will contain even small items without danger of
less.
It is still further an object to provide a hexagonal carton having
improved closing and locking means.
It is an additional object to provide a carton of the type
described which can be formed of an integral blank suitably cut and
scored.
Still further objects and advantages of the invention will appear
as the description proceeds.
BRIEF DESCRIPTION OF THE DRAWINGS
To the accomplishment of the foregoing and related ends, the
invention, then, consists of the carton herein fully described and
particularly pointed out in the claims, the annexed drawings and
the following description setting forth in detail certain
illustrative embodiments of the invention, such disclosed
embodiments illustrating, however, but several of the various ways
in which the principle of the invention may be used.
In the annexed drawings:
FIG. 1 is a perspective view of a fully erected and closed carton
according to the invention illustrating the top closure.
FIG. 2 is a perspective view of the carton of FIG. 1 illustrating
the bottom closure.
FIG. 3 is a plan view of an integral blank which may be utilized to
form a carton such as shown in FIGS. 1 and 2.
FIG. 4 is a plan view of a carton which has been glued together but
which is folded flat in storage condition.
FIG. 5 is an end view taken at the line V--V of FIG. 4, looking in
the direction of the arrows.
FIG. 6 is a top view of the carton of FIGS. 1-5 which has been
glued, the bottom folded in place, and the top flaps open for
filling the carton.
FIG. 7 is a top view of the carton of FIG. 6 in which the flaps are
in partially closed condition.
FIG. 8 is a top view showing the carton of FIGS. 6 and 7 with the
top completely closed and the flaps interlocked.
FIG. 9 is a side elevational view showing the top not completely
closed.
FIG. 10 is a fragmentary elevational view showing the top
completely closed.
FIG. 11 is a cross-sectional view taken at line XI--XI of FIG. 10,
looking in the direction of the arrows.
FIG. 12 is a bottom view of the carton of the invention.
FIG. 13 is a sectional view taken at the line XIII--XIII of FIG.
12, looking in the direction of the arrows; and
FIG. 14 is a sectional view taken at the line XIV--XIV of FIG. 13,
looking in the direction of the arrows.
DESCRIPTION OF THE SPECIFIC EMBODIMENTS
Referring more particularly to FIGS. 1 and 2, the carton 10 is
shown in perspective having a top closure 33 and a bottom closure
34. FIG. 3 illustrates an integral blank 11 from which the carton
may be constructed and in which the various panels may be more
clearly distinguished. The carton comprises side panels 12, 13, 14,
15, 16 and 17, and a glue flap 18 and 18a for affixing the edge of
the panel 17 to the edge of the panel 12 by means of an adhesive 19
such as glue applied to the edge of the panel 12 and flap 20. The
top closure is comprised of a plurality of top flaps 20, 21, 22,
23, 24 and 25 affixed to the ends of the side panels at hinge lines
26, 27, 28, 29, 30 and 31, respectively. The top flaps are
connected together by triangular webs 36, 37, 38, 39, 40 and 41 at
hinge lines 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52 and 32. Each
of the top flaps 20-25 have one lateral edge (35, 43, 45, 47, 49
and 51) perpendicular to the respective fold lines 26-31 of the
flaps. Additionally, each flap 20-25 has one lateral edge (42, 44,
46, 48, 50 and 52) oblique with respect to the fold lines 26-31 of
the flaps. In similar manner, each of the triangular webs 36-41 has
a lateral edge (43, 45, 47, 49, 51 and 32) perpendicular to the
fold lines 26-31, and another lateral edge (42, 44, 46, 48, 50 and
52) oblique to the fold lines. This arrangement permits the flaps
20-25 to be positioned either co-planar with the lateral panels
12-17 to present an open end of the carton, or alternatively
perpendicular to the panels and cooperating with the triangular
webs to form the interlocking pattern shown in FIG. 1. Each of the
flaps 20-25 are provided at their ends with semi-circular tabs 53,
54, 55, 56, 57 and 58.
The bottom closure, FIG. 3, comprises a hexagonal flap 65 having a
tab 64 at its end, and a pair of supporting flap assemblies. One
supporting flap assembly 66 comprises a supporting flap member 67
and a triangular glue flap member 68 connected thereto at a hinge
line 69. An end supporting flap 70 is hingedly connected to the
side panel 14. At the other side of the hexagonal flap 65 is
another flap assembly 75 comprising a supporting flap member 76 and
a triangular glue flap member 77 connected thereto at a hinge line
78. The flap members 67 and 76 are provided with arcuate or rounded
edges to prevent entanglement with other flaps or panels. An end
supporting flap 79 is hingedly connected to the side panel 16. The
end supporting flaps 70 and 79 are provided with recesses 85 and
86, respectively, to provide clearance of the hexagonal flap 65.
Ventilation holes 60, 61 and 62 may be provided in the carton top
if desired.
In gluing the carton together, the hexagonal flap 65 is first
folded over against the side panels 14, 15 and 16. The flap
assembly 75 and end supporting flap 79 are then folded over against
the side panels 16 and 17. The triangular glue flap member 77 is
then folded back against the flap 76 and glue placed on the exposed
surface of the triangular glue flap 77. The side panel 17 is then
folded over against the side panel 16. The triangular glue flap 77
is thereby adhesively affixed to a medial portion of the end
supporting flap 79 but leaving an overhang 79a, FIG. 14, of the
flap 79 beyond the glue flap supporting member 77. The flap
assembly 66 and end flap 70 are then folded over against the side
panels 13 and 14. The triangular glue flap member 68 is then folded
back against the flap 67 and glue applied. The panel 13 is then
folded over against the panel 14, causing the triangular glue flap
member 68 to be adhesively affixed to a medial portion of the end
flap 70 but leaving an overhang 70a, FIG. 14. Glue 19 is then
applied to the edge of the side panel 12 and end panel 20 which are
then caused to be affixed to the glue strip 18 and 18a, the carton
then being of the form shown in FIGS. 4 and 5, and in which
condition the carton may be stored and transported.
The carton is erected by compressing together the opposite side
edges, thereby opening the carton, and then pushing the hexagonal
flap 65 outwardly until it engages the glued together flaps 67 and
70, and 76 and 79, which flaps retain the hexagonal flap 65 in
position. The tab 64 is at the same time bent until its flap
surface engages the panel 12, thereby forming a substantially
leakproof container, as shown in FIGS. 12, 13 and 14. In this
condition the overhanging areas 70a and 79a reinforce the bottom
and prevent outward bending of the flap at the hinge lines 69 and
78 (FIGS. 12, 13 and 14).
After the desired contents have been placed in the carton, the
carton is closed by first forming a star pattern such as shown in
FIG. 7, and pinching toward the center, as shown in FIGS. 7 and 9.
When the flaps reach the flattened position as shown in FIGS. 8, 10
and 11, the flaps are interlocked and the top remains closed. The
top may be opened by raising and disengaging the flaps.
The carton of the present invention has many advantages over prior
art cartons. Because of the arrangement of the bottom flaps which
are glued together and which sustain the hexagonal flap, an
exceedingly strong supporting bottom structure is formed. The
closure structure is further strengthened by the presence of the
supporting flap overhangs which prevent the flaps from bowing
outward at the glue flap hinge lines. Moreover, the bottom flaps
are so arranged that they may be folded for storage. Additionally,
because of the unique pattern of the flaps and because of the way
in which they fold, the entire carton may be readily folded flat
for storage and transportation, and subsequently quickly erected.
The unique arrangement of the top flaps provides a positive locking
and attractively appearing top.
While but one embodiment of the invention has been illustrated and
described herein, it is to be understood that minor modifications
may be made to the carton, as well as the construction and
arrangement of its bottom flaps within the spirit and scope of the
invention, as herein set forth. It is also to be noted that while
directional terms have been used, same are not to be construed as a
limitation of the invention since such use has been availed of to
better describe the invention in the position illustrated in the
drawings.
Other modes of applying the principle of my invention may be
employed instead of those explained, change being made as regards
the structure herein disclosed, provided those defined by any of
the following claims or their equivalents be employed.
* * * * *