U.S. patent number 3,767,107 [Application Number 05/304,465] was granted by the patent office on 1973-10-23 for pour spout carton.
This patent grant is currently assigned to Westvaco Corporation. Invention is credited to Hampton E. Forbes, Jr..
United States Patent |
3,767,107 |
Forbes, Jr. |
October 23, 1973 |
POUR SPOUT CARTON
Abstract
The present invention relates to a carton having integral
collapsible pour spout opening which can either be extended into a
spout or collapsed to form a flush top closed package. The pour
spout portion of the carton is formed by a series of cut and scored
triangular panels in the top closure flaps thereof which triangular
panels include an attached cover panel for overlying the pour spout
panels and the pour spout opening when the carton is not in use,
the improvement comprising the arrangement of the various pour
spout panels and the cover panel to permit access to the pour spout
without the necessity of providing tear-away elements or perforated
areas in the carton top.
Inventors: |
Forbes, Jr.; Hampton E.
(Wilmington, DE) |
Assignee: |
Westvaco Corporation (New York,
NY)
|
Family
ID: |
23176635 |
Appl.
No.: |
05/304,465 |
Filed: |
November 7, 1972 |
Current U.S.
Class: |
229/248; 222/556;
427/131 |
Current CPC
Class: |
B65D
5/742 (20130101) |
Current International
Class: |
B65D
5/74 (20060101); B65d 005/72 () |
Field of
Search: |
;272/526,527,533,556,574,531 ;229/17R,7R,17M ;206/56R |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Reeves; Robert B.
Assistant Examiner: Slattery; James M.
Claims
I claim:
1. A pour spout carton having spaced front and rear panels joined
on each side by a pair of side panels, a glue panel foldably
attached to the rear panel and adhered to one of said side panels,
a plurality of top closure flaps and bottom closure flaps foldably
attached to the ends of said front, rear and side panels, and a
pull-out pouring spout for the top of said carton, said spout
including a central triangular panel which forms a part of the top
closure flap attached to said front panel, a pair of intermediate
triangular panels disposed one on each side of said central
triangular panel along the substantially perpendicular fold lines
which form said central triangular panel and connected to the
adjacent top closure flaps by parallel fold lines, and a second
pair of triangular panels disposed one on each side of said
intermediate triangular panels along the parallel fold lines and
foldably attached to the respective adjacent top closure flaps
along diagonal fold lines, each of said triangular panels and the
central triangular panel forming the spout portion of said carton,
one of said second triangular panels including an extension thereof
which completely covers the spout portion of said carton in the
closed condition, and an integral carton opening tab foldably
attached to said second triangular panel, the improvement
comprising means for obtaining access to the carton pouring spout
in the absence of any tear lines or perforated panels in the carton
top closure which means consists of grasping the integral carton
opening tab and folding the second triangular panel extension
member back along its diagonal fold line to expose the carton pour
spout portion.
2. The carton of claim 1 wherein the second triangular panel
extension member is releasably adhered only to one of said first
intermediate triangular panels.
3. The carton of claim 2 wherein one of the first intermediate
triangular panels includes an integral extension thereof which is
utilized to open the pour spout of said carton.
4. The carton of claim 3 wherein the integral extension portion of
said first triangular panel is inserted between the remaining first
triangular panel and one of the second triangular panels when the
pour spout is closed to form a friction lock for assisting in
retaining the pour spout in a closed condition.
Description
SUMMARY OF INVENTION
The present invention relates generally to a carton having a novel
integral pour spout and cover therefor, which pour spout is
selectively extended into a spout for dispensing the contents of
the carton or collapsed to thereby form a flush top closed
package.
In particular, the present invention relates to a carton having a
pull-out pouring spout under the top of the carton and a means for
obtaining access to the pouring spout which means is particularly
characterized as being free from any requirement for perforated or
tear-away panels to produce the desired results. In addition,
because of the novel arrangment of the pour spout element of the
carton, in conjunction with the top closure member, the carton of
the present invention is provided with a unique integral cover
panel for overlying the pour spout and the pour spout opening when
the carton is not in use.
The carton of the present invention is especially intended for
packaging granular or powdered materials such as soap powder, dried
milk, sugar, salt and the like, with the primary objective being to
eliminate the tempermental, unwieldly and unreliable opening
schemes commonly employed on similar cartons throughout the
industry.
Another object of the present invention is to provide a pour spout
carton which overcomes the spillage problem and loss of contents
due to sifting of the product often experienced with the prior art
cartons.
Still another object of the present invention is to provide a
carton wherein the individual components of the pour spout together
with the novel pour spout opening cover member preserve the usual
shape and configuration of the carton in the closed condition
insofar as a flat, horizontal top is concerned.
A further object of the present invention is to provide a pour
spout carton in which the spout includes an extension on one panel
thereof which is frictionally received between other spout forming
panel members in the closed condition of the pour spout, to
maintain the pour spout in a closed condition, and an additional
pour spout cover member as an extension on yet another panel of the
pour spout, which pour spout cover member overlies and covers the
pour spout when not in use.
An additional object of the present invention is to provide a pour
spout carton wherein none of the various panels which make up the
pour spout are adhered to one another.
Yet another object of the present invention is to provide in a pour
spout carton a means for obtaining access to the pour spout
mechanism without the need for tear-away elements or perforated
panels are required with the prior art pour spout cartons.
DESCRIPTION OF PRIOR ART
The United States patents to C. Ray U.S. Pat. No. 2,300,703; D. A.
Clark et al., U.S. Pat No. 3,003,673; and, R. L. Harms, U.S. Pat.
No. 3,059,826 disclose collapsable pour spout cartons which in each
case require one or more of the pour spout forming panels to be
adhered to one another and ripped apart along perforated lines for
either obtaining access to the pour spout or permitting actual use
of the pour spout.
DESCRIPTION OF DRAWING
FIG. 1 is a plan view of the blank from which the carton of the
present invention is constructed;
FIG. 2 is a partial perspective view of the top end of the carton
formed from the blank of FIG. 1, with the top closure flaps in
their open extended condition;
FIG. 3 is a view similar to FIG. 2 with the top closure flaps of
the carton in a partially closed condition;
FIG. 4 is a plan view of a portion of the top of the carton showing
the top completely closed;
FIG. 5 is a view similar to FIG. 4 with the pour spout cover panel
folded back;
FIG. 6 is a view similar to FIG. 5 showing the second step in
opening the pour spout;
FIG. 7 is a side view of the pour spout in the open condition;
and,
FIG. 8 is a partial perspective view of the pour spout of the
carton in an open condition.
DETAILED DESCRIPTION
Referring first to FIG. 1, the carton is formed from a
substantially rectangular blank, preferably of paperboard, which is
suitably divided by cut and score lines into a series of panels,
flaps and tabs to produce the novel pour spout of the present
invention. In particular, the blank shown in FIG. 1 includes a
plurality of side wall panels 12, 13, 14 and 15 connected to one
another along the parallel fold lines 17, 18 and 19, which panels
comprise the carton rear panel 12, side panels 13, 15 and front
panel 14. Attached to the rear panel 12 along a fold line 16 is a
glue flap 11 which, with its extensions 22 and 27, serves to adhere
the carton together in its set-up condition. Each of the sidewall
panels also include more-or-less conventional bottom closure flaps
23, 24, 25 and 26 foldably attached thereto along the lower fold
line 20, while a series of top closure flaps are attached to the
upper ends of the sidewall panels. The top closure flaps designated
generally as elements 30, 31, 44 and 39 are each attached to the
sidewall panels along the upper fold line 21 and these flaps are
scored in such a manner as to provide the carton with its novel
pouring spout.
In this regard, the top closoure flap 30, attached to the rear
panel 12, is divided by a diagonal score line 29 to form a
substantially right triangular segment identified as element 28.
Top closure flap 31, attached to the side panel 13, includes a
first diagonal score line 32 at one end thereof to form a
substantially right triangular segment 35, and a second score line
33 which forms an elongated opening tab 34 along one of the legs of
the right triangle 35. Meanwhile, the top closure flap attached to
the front panel 14 is divided by a pair of intersecting, diagonal
score lines 41, 42 to form the central isosceles triangular panel
44 and the two identical and opposed substantially right triangles
36, 37. The latter two triangles are formed by the intersecting
diagonal score lines 41, 42 and by continuations of score lines 18
and 19 which divide the top closure flap of front wall 14 from the
top closure flaps 31 and 39 respectively. In addition, the right
triangular portion 37 includes and an integral part thereof a small
tab element which is positioned to aid in the opening and closing
of the pour spout. Finally, the top closure flap 39, attached to
the side panel 15, includes a diagonal score line 40 at one end
thereof to form yet another right triangular portion 38. Each of
the scored areas of top closure flaps 31, 44 and 39 make up a part
of the novel pour spout area 47 of the carton which is particularly
characterized as being free from any requirement for perforated or
tear-away panels to produce the desired results. In addition,
because of the novel orientation of the different score lines in
flaps 31, 44 and 39, the carton of the present invention is
provided with a unique separate cover member 35 for overlying the
pour spout opening when the carton is not in use.
In order to form the carton of the present invention using a carton
blank as shown in FIG. 1, the blank is initially either straight
line glued or applied with spots of adhesive on the backside of the
glue flap 11 and its extensions 22, 27 as shown generally by the
reference character 46. The carton blank is then folded first along
fold line 17 to expose the adhesive at 46 and secondly along fold
line 19 to adhere the side panel 15 to the glue flap 11 while
simultaneously adhering glue flap extensions 22 and 27 respectively
to the bottom closure flap 26 and the top closure flap 39. By
providing extensions at 22 and 27 to the glue flap 11, a leak proof
seal is provided for the carton along the fold line 16 in both the
bottom and top of the carton. In this condition, the carton may be
shipped to the user in the flattened condition and ready to be
filled and sealed.
When the carton is to be used, it is squared and set up as
indicated in FIG. 2. The carton may be first closed at the bottom
and filled through the top, or the top can be closed and the carton
then filled from the bottom. In either case, after filling, the
remaining open end of the carton is closed. However, for the
purpose of the present invention, where more-or-less conventional
bottom closure flaps are used, the sequence for filling and closing
would be first, the bottom is closed using readily available carton
forming machinery and then the carton is filled before closing the
top. For the purpose of illustrating the novel top closure and pour
spout provided herein, reference to FIG. 3 clearly shows the steps
to be taken.
With the upper end of the carton in the FIG. 3 position, the inner
panel 44 at the front of the carton and the inner panel 30 at the
rear of the carton are folded inwardly to draw the intermediate
rear triangular panel 28 and the paired intermediate front
triangular panels 36, 37 downwardly into a closed position. This
movement, accompanied by simultaneous downward movement of top
closure flap 39, places the top closure flap 39 and the attached
front triangular panel 38 in a position for the application of
adhesive for sealing the top of the carton.
As will be appreciated, when the rear inner panel 30 and the rear
triangular panel 28 are folded into contact with one another an
effective leak proof seal is achieved at the rear upper end of the
carton. Similarly, as the inner panel 44 is folded downwardly the
attached intermediate front triangular panels 36, 37 tend to
overlap the inner panel 44 to produce an effective leak proof seal
at the front upper end of the carton.
Subsequently, with the top closure flap 39 folded downwardly as
described above, adhesive is applied thereto as shown at 45 in FIG.
3 while at the same time, a spot of adhesive 43 is appled to the
attached front triangular panel 38 for adhering the pour spout
closure panel 35 thereto. It should be obvious that the adhesive
applied at 45 is intended to more-or-less permanently adhere top
closure flap 39 to the top closure flap 31. Of course, if desired
either a permanent adhesive, or one having resealable
characteristics could be applied at the spot 43. Where a resealable
adhesive is used at spot 43, the pour spout closure panel 35 can be
returned to its closed position when the carton is not in use.
Alternatively, and where gluing machinery of the type which printed
a continuous line of adhesive was used, the same releasable effect
for the extension panel 35 could be achieved by overprinting the
panel 38 in the region of spot 43 with an ink or varnish that would
permit release. For this latter embodiment, the adhesive at 45
could then be extended completely along flap 39 and panel 38
without affecting the releasable nature of extension 35.
FIG. 4 shows the appearance of the top of the carton in the filled
and sealed condition. In this Figure, the pour spout closure panel
35 is illustrated with the opening tab 34 attached thereto. When
the carton as shown in FIG. 4 is to be used, the top is opened and
the pour spout 47 exposed for use as shown in FIGS. 5-7. Note in
FIG. 5, that when the opening tab 34 is grasped for pivoting the
pour spout closure panel 35 about its fold line 33, the adhesive
applied at spot 43 whether it be of the permanent type or a
resealable type, offers no substantial resistance to the movement
of the panel extension 35 to expose the pour spout 47. Thus, the
adhesive at 43 breaks free as the pour spout closure panel
extension 35 is pivoted up, about its fold line 33, to expose the
pour spout panels. It is believed that this particular feature
represents a major advantage of the carton of the present invention
since no tear-away elements or perforated panels are required in
order to obtain complete access to the pour spout mechanism as has
always been required with the prior art pour spout cartons.
Subsequently, moving on to FIG. 6, the next step required for
opening the pour spout element 47 is shown, wherein the paired
right triangular panels 37, 38 are folded to the side to expose the
inner central triangular panel 44 by grasping the integral tab
attached to panel 37. This step readies the pour spout for the
final opening step illustrated in FIGS. 7 and 8. For the final
step, the integral tab of panel 37 is simply pulled outwardly to
cause the pour spout panels 36, 37, 38, 44 and part of 35 to
complete the formation of the pour spout in its open condition
shown in FIG. 8.
FIG. 7 illustrates from the side the open pour spout 47 in the
dispensing condition. Further attention to the different views of
the pour spout opening mechanism shown in FIGS. 5-8 clearly show
the symmetrical nature of the opened pour spout. It should also be
noted that the diagonal score lines 41 and 42 describe an angle
there-between that is approximately 90 degrees, but as a practical
matter is preferably slightly less than 90 degrees. By making the
angle between the score lines 41, 42 slightly less than 90 degrees,
the inner panel 44 is urged upwardly and into contact with the
right triangular panels 36, 37 to promote a tight seal and cause
the paperboard at the intersection of the score lines 41, 42 to
become jammed to eliminate any opening at that point. Of course, as
the pour spout opening is being closed, either initially or after
subsequent use, the integral tab on the right triangular panel 37
tends to insert itself between the pour spout closure flap 35 and
the right triangular panel 36. This action provides a friction lock
to the pour spout in the closed condition since there is a
frictional resistance of the integral tab on panel 37 to being
removed from its inserted position. The friction lock is easily
broken simply by lifting the tab 34 of panel 35, however, where it
is not desired nor feasible to use a resealable adhesive at spot 43
the friction lock still provides a limited reclosure locking
ability to the carton of the present invention.
Thus it may be seen that the present invention describes a
convenient and economical reclosable pour spout dispensing carton
that requires no perforated or tear-away panels for providing
access to the integral pouring spout. The carton construction
described and illustrated represents only a preferred embodiment of
the invention and it should be clear that modifications and changes
in the preferred form could be made without departing from the
invention as claimed. The terms used in describing the invention
have been used in their descriptive sense only, and not as terms of
limitation, it being intended that all equivalents thereof be
included within the scope of the appended claims.
* * * * *