US3767107A

US3767107A - Pour spout carton

Info

Publication number: US3767107A
Application number: US00304465A
Authority: US
Inventors: H Forbes
Original assignee: Westvaco Corp
Current assignee: Westvaco Corp
Priority date: 1972-11-07
Filing date: 1972-11-07
Publication date: 1973-10-23
Anticipated expiration: 1990-10-23

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.

Description

United StatesPa te nt [191 Forbes, Jr.

[ 1 Oct. 23, 1973 Primary Examiner-Robert B. Reeves Assistant Examiner-James M. Slattery Att0rneyLarry C. Hall et a1.

[57] 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.

4 Claims, 8 Drawing Figures 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 tearaway 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 panelfor 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 objectof the presentinvention is to provide a carton wherein the individual components of the pour spout together with the novelpour spout opening cover member preserve the usual shape and configuration of the cartonin 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'anextension on one panel thereof which is frictionally received between other spout forming panelmembers 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 thepour spout when not in use.

An additional object of the present invention is to provide a pour spout carton wherein none of the variouspanels 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 spoutcartons.

DESCRIPTION OF PRIOR ART The United States patents to C. Ray US. Pat. No.

2,300,703; D. A; Clark etal., US. Pat No. 3,003,673;

and, R. L. Harms, US. 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 spoutor 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 spo'ut cover panel folded back;

FIG. 6 is a view similar to FIG. 5 showing the second stepin opening the pour spout;

FIG. 7 is a side view of the pour spoutin 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 1 1 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 l1 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 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 con dition 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 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 7 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.

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 fold-ably 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 traingular 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 traingular 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.

Claims

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.