US3281057A

US3281057A - Recloseable carton having narrow cover front face panel

Info

Publication number: US3281057A
Application number: US485989A
Authority: US
Inventors: Kenneth T Buttery
Original assignee: Brown Co
Current assignee: Fort James Corp
Priority date: 1965-09-09
Filing date: 1965-09-09
Publication date: 1966-10-25
Anticipated expiration: 1983-10-25
Also published as: NL6611821A; GB1084407A

Description

Oct. 25, 1966 K. T. BUTTERY RECLOSEABLE CARTON HAVING NARROW COVER FRONT FACE PANEL Filed Sept. 9, 1965 5 Sheets-Sheet l a fiery aft y Oct. 25, 1966 K. T. BUTTERY 3,281,057

RECLOSEABLE CARTON HAVING NARROW COVER FRONT FACE PANEL Filed Sept. 9, 1965 5 Sheets-Sheet 2 Oct. 25, 1966 K. r. BUTTERY RECLOSEABLE CARTON HAVING NARROW COVER FRONT PAGE PANEL 5 Sheets-Sheet 5 Filed Sept. 9, 1965 Oct. 25, 1966 K. T. BUTTERY RECLOSEABLE CARTON HAVING NARROW COVER FRONT FACE PANEL Filed Sept. 9, 196

5 Sheets-Sheet 4 g%21 er2i0I Yfwmeifi 21514556127 Oct. 25, 1966 K. T. BUTTERY 3,281,057

RECLOSEABLE CARTON HAVING NARROW COVER FRONT FACE PANEL Filed Sept. 9, 1965 5 Sheets-Sheet 5 ennez]? 7151:5567

United States Patent 3,281,057 RECLOSEABLE CARTON HAVING NARROW COVER FRONT FACE PANEL Kenneth T. Buttery, Kalamazoo, Mich., assignor, by mesne assignments, to Brown Company, a corporation of Delaware Filed Sept. 9, 1965, Ser. No. 485,989

6 Claims. '(Cl. 229-51) The present invention relates to cartons, and is more particularly concerned with cartons which may be readily and inexpensively erected from integral cut and scored blanks, particularly mutually nestable blanks, and which cartons may be readily and positively sealed by means of automatic machinery, especially such cartons as are recloseable and have a narrow cover front face panel.

Cartons having a so-called flip-top cover hingedly connected to the edge of the rear panel, which may be erected with the cover in sealed condition and which may be readily opened by the removal of a tear strip, have become exceedingly popular as containers for food items such as ice cream. Once the tear strip is removed, the cover may be opened for access to some or all of the contents, and may be reclosed for further storage until the contents have been completely consumed. Cartons of the type described which have been available in the prior art, although satisfactory in use, have the disadvantage that they are difiicult to construct and seal on automatic machinery.

Prior art cartons are generally provided with an outer front wall member integral with the cover of the carton, having its own flaps extending at the ends thereof. A tear strip is provided as an integral unit and extends from the end of one outer front wall flap, across the outer front wall, and .to the end of the opposite outer front wall flap. Such a structure is expensive, difiicult to construct into a carton from an integral blank, and requires expensive machinery for the purposes of erection and sealing. Additionally, the structure requires a large amount of paperboard, thus adding to the cost of the materials employed. Moreover, for many purposes it is sufficient for only the cover front wall to be provided with detachable means adhesively laffixing the cover to the front wall of the carton. Moreover, even where it is necessary to provide some means for afiixing the cover end walls to the end walls of the body of the carton, it is in many cases sufl'icient to provide means of limited extent for so doing. A further economy may be accomplished by shortening the cover front wall so that the blank from which the carton is formed is substantially shorter and is more completely mutually nestable with adjacent carton blanks cut from the paperboard sheet. However, problems arise with cartons having such shortened cover front walls in that, once the tear strip has been removed, upon reclosure difliculty is experienced in retaining the cover in closed position. 7

It is an object of the present invention to provide a carton which may be formed from integral cut and scored mutually nestable blanks. It is a further object to provide a top-opening carton which may be sealed by means of a detachable adhesive strip afiixing the cover to the front wall of the carton. It is another object to provide such a carton which may be readily reclosed when it is desired to store unconsumed contents. It is a still further object to provide a carton of the type described which can be readily erected and subsequently sealed by means of relatively simple and inexpensive machinery. It is an additional object to provide a carton having its panels so contoured as to facilitate assembling and heat sealing the various panels to form a strongly sealed carton. It is a primary object of the invention to provide a carton of the type described having a cover front wall See panel which is. shorter than the cover end wall panels but, nevertheless, one wherein the cover has the capacity to remain closed after the carton has been opened and the cover reclosed. It is a foremost object of this invention to provide a carton of the type described having a shortened cover front wall panel which permits economy in the amount of paperboard or other material of construction employed, but which nevertheless permits inclusion of a tear strip as a detachable part of the entire cover front wall flap or member, and which moreover includes means which permit and insure the effective reclosure of the cover once the carton has been opened by detaching the tear strip which originally adheres the cover assembly to the container body assembly. It is an additional object of the invention to provide a carton of the type described having means provided which is effective in frictionally restraining the cover in closed position after the tear strip or other securing means has been removed, and which so restrains the cover in closed position even when the carton is moved or jostled about under normal household use. The accomplishment of the foregoing and additional objects will become more fully apparent hereinafter. I

The invention in its preferred embodiment is illustrated by the accompanying drawings in which:

FIG. 1 is a plan view of a blank cut and scored for assembling a carton according to the invention, and additionally showing a portion of the edge of an adjacent blank nesting therewith.

I FIG. 2 is a plan view of the blank folded over and glued to form a flattened tube.

FIG. 3 is an end view of the carton showing the front and rear wall outer end flaps in partially folded position.

FIG. 4 is a bottom view of the structure of FIG. 3.

FIG. 5 is a cross-sectional view taken at the line 5-5 of FIG. 4.

FIG. 6 is a perspective view of the sealed carton.

FIG. 7 is a perspective view of the carton of FIG. 6 after the seal has been broken and the cover opened.

FIG. 8 is a plan view of a blank cut and scored for assembling an alternative embodiment of the invention, also showing a portion of the edge of another blank nested therewith.

FIG. 9 is a perspective view of the sealed carton prepared from the blank of FIG. 8; and

FIG. 10 is a perspective view of the carton of FIG. 9 after the seal has been broken and the cover opened.

According to the invention, a carton is provided which is so that it accomplishes the objects and provides the advantages stated and described above, and which more specifically is formed from an integral blank having panels including a bottom member having inner end wall flaps hingedly connected to the ends thereof, a front wall member hingedly connected to one edge of the bottom member having front wall outer end flaps hingedly connected to the ends thereof, and a rear wall member hingedly connected to the other edge of the bottom member having rear wall outer end flaps hingedly connected tothe ends thereof. A cover is provided which is hingedly connected to the upper edge of the rear wall member. The cover is provided with cover flaps comprising cover end wall panels and a cover front wall panel. The cover front wall panel is designed so that its length is smaller than the length of the cover end wall panels, the term length being used in reference to the distance between the score line defining the panel and the edge of the panel parallel thereto. The cover front wall panel is provided at its ends with end flaps overlapped by and adhesively affixed to the cover end wall panels. Each end flap of the cover front wall panel is so contoured that a portion thereof extends downwardly in the erected carton (and longitudinally with respect to the direction of the carton blank) a distance beyond the severance line defining the edge of the cover front Wall panel. Additionally, triangular webs connected to the ends .of thecover front wallpanel and integral with the saidend flap extensions, extend below the edge of the cover front wall panel in the erected cartonand cooperate with the end flaps to provide a structure frictionally engaging the body of the carton and thereby retaining the cover in closed position after it has once been opened and then reclosed.

" In a preferred embodiment, the cover end wall panels are each provided with a detachable adhesive panelconnected thereto at a severance line. The structure of the carton is so designed that adjacent blanks may be reversed 'for nesting together during the cutting process in. order to conserve paperboard raw material. Several features are provided which facilitate such nesting. .The rear wall outer end flaps, the cover end wall flaps, and the cover front wall end flaps are designed to be shorter than the front wall outer endflapand the inner end wall flaps. The upper terminal corner of each rear wall outer end flap may be provided with a recess, preferably rectangular, so designed that when adjacent blanks are nested together in opposite directions with the oblique recessions of the rear wall outer end flaps in edge-to-edge engagement, the edges of the rear upper corner of the .inner end wall flap ofoneblank are nested in edge-to-edge engagement the edges of the corner recess of the ,7

rear wall outer end flap of the other blank. As a result of these structur-aldesigns, blanks may be cut from the stock paperboard in reversed nesting arrangement, resulting in a substantial saving in raw material cost. Further, ,the oblique recesses at the lower terminal corners of the rear wall outer end flaps provide an. additional advantage, in that they permit the forward edge of these flaps wherein areas having an adhesive applied thereto are indicated by stippled shading. In a preferred form, the carton of the invention is constructed from an integral blank, as illustrated in FIG. 1, and comprises a bottom panel member 1, a front wall member 2, and a rear wall- 'member 3 hingedly connected to the bottom member 1. Acover 4 is hingedly connected to the rear wall member 3. The bottom 1 is provided at its ends with inner end wall flaps 5 hingedly connected thereto, the front wall member-2 is provided at its ends with front wall outer end flaps 6 hingedly connected thereto, and the rear wall member 3 is provided with rear wall outer end flaps 7 hingedly connected thereto.

The cover 4 is provided with end flaps 8 comprising cover end wall panels 9 having panels 10 connected to 'the panels 9 at severance or fracture lines 11, and adhe- 'sively aflixed to both the front wall outer end flap 6 and rear wall outer end flap 7. The cover 4 is also provided at its forward edge with a cover flap 12 comprising a cover front Wall panel 13, and severance or fracture lines 14 defining a detachable tear strip 15 having a tab or graspableportionlfi at least at one end. thereof An adhesive panel 1 7 is adhesively affixed to the front wall member. As can be seen in the drawings, the cover front wall panel 13 is made shorter than the cover end Wall panels 9 in order to effecta saving in paperboard dinally beyond the said severance line. The inner corner of the overhang 18a is provided with an obliquely recessed edge 18b. The oblique edge 18b is preferably colinear with a cut 21 extending from the said severance line 14 at the edge of the cover .front wall panel defining a beveled edge of the tab 16 of the tear strip 15 on one side and defining a triangular web 22 on the other side thereof, said web being connected to and extending longitudinally beyond the edge of the cover front wall panel. The overhang 18a constitutes an extension of the triangular web 22. As a result of this structure, a material saving is accomplished by the shortening of the cover front wall member. Moreover, in order to avoid difliculty in maintaining the cover having the shortened front panel in closed position, the triangular webs 22 and the depending portions of the cover front wall end flaps 18 cooperate to. provide frictional engagement of the cover against the front Wall and side walls forming the corners of the carton, thus retaining the cover in closed position afterthe panel 13 has been detached at the severance line 14. j

The lower portions of the terminal edges of the rear wall'outer end flaps are each preferably provided with an oblique recession 19 receding from the forward-most terminal edge 23 toward the bottom edge of the flap 7 to a vertical edge 23a having the same length as the edge 23.

The forward edge 23 should be positioned a sufficient distance from the bottom edge of the flap, or from an imaginary line representing an extension of the score line 25, so that the edge 23 clears the adhesive area '24 when the

flaps

6 and 7 are folded together. A corner recess 20 is also provided in the upper terminal corner of the rear outer end wall flap 7 to facilitate nesting (if adjacent blanks when they are cut from the paperboard stock, as shown in FIG. 1. The oblique receding edge 19, which should preferably be straight, has a further function in that it permits the oblique edge 19 of an adjacent blank to nest closely therewith, as shown in FIG. 1, accomplishing a material saving in raw material.

In the broader aspects of the invention, the recess or cut-out20 may be omitted, thus increasing the vertical dimension of the forward edge 23 of flap 7 or of the oblique recession 19. Although such embodiment does.

front wall outer end flap 6, and that it permits the flap 6 to be directly adhered to the inner end wall 5 over a significant segment of its length.

In assembling the carton, the carton blank may be folded at the score line between the bottom 1 and rear wall member 3. The cover front wall panel 13 is then folded over and the adhesive panel 17 alfixed to the outer surface of the, front wall member 2, forming a folded tube, as shown in \FIG. 2. Alternatively, the front wall member '2' may be folded over at thescore line connecting it with the bottom 1, and the adhesive panel 17 may then be glued to the outer surface of the front wall member 2 in the same manner. In either form the carton so foldedoccupies veryv little space, and may be shipped to the packager in this form for filling and sealing. 7

To erect the carton further for filling, the folded carton is, squared up, as on a conventional squaring machine. One end is then closed by first folding in the inner end wall flap 5. The rear wall outer end flap 7 and the front wall outer end. flap 6 are then folded in, the frontwall "outer end flap overlapping the rear wall outer end flap.

The contour provided by the recessed edge 19 permits the terminal edge 23 of the rear wall outer end, fiap 7 to clear the adhesive area 24 on the inner surface. of the outer wall'end flap 6. The cover front wallfpanel end flap 18 is then folded over, followed finally by the folding over of the cover end Wall panel 9. The greater length of the flap 18 permits it to be engaged and folded over by the plow of the folding apparatus before the panel 9 (of lesser width) is engaged. Heat is then applied to activate and set the adhesive, causing the front wall outer end flap 6 to become adhesively afiixed to the rear wall outer end flap 7 and also to the inner end flap 5. The adhesive panel becomes adhesively affixed to the rear wall outer end flap 7 and cover front wall panel end flap 18 becomes affixed to cover end wall panel 9. The cart-on may then be filled through the end remaining open. The opened end may subsequently be closed and sealed in the same manner, to form a completely sealed carton as shown in FIG. 6. Alternatively, the first carton end may be closed and/or tacked, as with glue, but not sealed, and then both carton ends sealed concurrently or simultaneously after filling of the carton.

The carton may be opened by grasping the tab 16 and removing the tear strip 15. As the cover is subsequently lifted open, the cover end wall panels 9 are parted from the adhesive panels 10 at the severance lines 11, forming the structure shown in FIG. 7. The cover may be reclosed for storing any unconsumed contents. When so closed, the triangular webs 22 engage the front wall member 3, and the flaps 18, including the overhangs or extensions 18a, engage the front wall outer end flaps 6, retaining the cover in place.

A modified embodiment of the invention is shown in FIGS. 8-10. In this embodiment the basic structure is the same as that shown in FIGS. 1-7. However, here the adhesive panel 17 is directly connected to the cover front wall panel 13 at a severance line 14. Moreover, instead of being adhesively affixed to the front wall member 2 throughout its entire area, the adhesive strip 17 is afiixed to the front wall member only at isolated adhesive areas 30 as, for example, in the form of circles, ovals, tear drops, or rectangles, provided either on the surface of the adhesive panel as shown in FIG. 8, or on the corresponding areas of the front wall member 2. If desired, a glue resist coating or glue resist ink, or both may be advantageously applied intermediate the adhesive areas to prevent adhesion at such places when a general application of the adhesive is provided. Intermediate the adhesive areas 30 transverse cuts 31 are provided in the adhesive panel 17 for facilitating the removal of the adhesive panel. Cut scores 32 are also provided on the front surface of the front wall member surrounding the areas to which the adhesive areas 30 are to become aflixed.

In the preferred version of the embodiment shown in FIGS. 8-10., the entire area of the front wall member (excluding glue areas) to which the adhesive panel or strip is to be sealed is coated with a solid coating of a glue-repellent ink, preferably one having microcrystalprinting formed by means of a dot pattern. The entire outer surface of the cart-on is pattern-coated with a release agent such as a wax coating, excluding the circular, oval, tear-drop, or other areas defined by the cut scores 32, which areas are to be glued to the adhesive strip. The inner surface of the entire carton is also coated with a release coating such as wax, excluding the areas on the adhesive strip which subsequently are to be placed in register with the glue areas of the front wall member defined by the cut scores 32. A conventional glue composition is then appled as a solid coating over the inner surface of the adhesive strip 17. Consequently, when the adhesive panel or strip 17 is folded over onto the front wall member 2, it becomes adhered to the front wall member only at the tear-drop areas defined by the cut score lines 32, which areas are substantially free of any release agent such as wax. In the preferred embodiment, the transverse cuts 31 are postioned immediately forward of each adhesive area 30 with respect to the direction of tear. Consequently, when the adhesive panel 17 is grasped at the tab. 16 and removed, it parts cleanly from the front 6 wall member, except in the adhesive zones surrounded by the cut score lines 32, within which zones only the top liner is removed in the tearing process.

Although either the wax coating or the glue repellent ink may be used separately as a release agent to prevent adhesion between the adhesive panel 17 and the front wall member 2, optimum results are obtained by the use of the combination of both. Moreover, although rectangular areas may be provided free from the release agent at the adhesive zones, optimum results are obtained when the printed application of the release coating is closely patterned around the oval or tear drop areas, substantially exactly in register with the areas of the oval or tear drop. The conventional adhesive, such as glue, is laid down as a solid strip on the front wall member from one end of the adhesive strip to the other. Other types of adhesive may be used if desired. Although in the prefered embodiment the adhesive is placed on the panel 17, it may if desired be applied to the front wall member 2. The transverse cuts 31 serve to prevent splitting of the the stock as the adhesive strip zipper is pulled off. However, they may be dispensed with in certain applications.

Although preferred forms of adhesive panels or strips have been described and illustrated in the drawings, other forms, generally more simplified, may also be utilized. For example the entire panel or strip 17 may be adhered to the front wall member 2. The cover may then be separated from the adhesive panel by tearing the severance line by means of a knife, or merely by running a fingernail along the severance line while pressing inwardly. Other forms of adhesive panels known to the art having a structure wherein they are separated from the cover front wall panel by at least one severance line may also be used.

The carton of FIGS. 8-10 is assembled and sealed in substantially the same manner as described above. The sealed carton may be opened by grasping the tab 16 and completely removing the panel 17. As the cover is lifted open, the adhesive panels 10 are detached and permit the cover to be fully opened.

The carton of the invention has an important advantage over prior art cartons in that successive blanks may be positioned and cut in closely nested position, effecting a substantial saving in material costs. A further saving in material cost results from the fact that the cover front wall panel is materially shortened, permitting more perfect nesting. The difiiculties which might otherwise be inherent in a shortened cover front wall panel are overcome by the novel structure having a dependent triangular web extending beyond the edge of the panel cooperating with a cover front panel end flap having a depending portion extending beyond the edge of the cover front wall panel, which structures frictionally engages the front wall and end of the carton and retain the cover in closed position even after it has been unsealed and reclosed.

The terminal edges of the rear wall outer end flaps are so contoured that they do not interfere with the adhesive contained upon the inner surface of the front wall outer end flaps, facilitating the assembly of the carton. Further, the increased length of the cover front wall panel flaps with respect to the width of the cover end wall panels facilitates their being properly folded under the cover end wall panels using inexpensive machinery or adaptations thereof.

It is thus seen that an economical and conveniently erected and sealed carton of sufiicient durability for frequent opening and reclosing is produced, from an integral blank so designed that adjacent blanks may be oriented for close mutual nesting to provide an appreciable saving in cost of raw material, and whereby all of the other objectives of the invention are attained.

Although the invention has been described primarily as it would be practiced when a heat-scalable adhesive is carried directly on the carton blank, other types and hesive to effect sealing of the carton may be employed. Plastic (such as polyethylene) coated or wax coated paperboard, or laminated paperboard with openings for extrusion sealing, may also be employed for the cartons and carton blanks according to the invention. 7

The outer end flap tapers 50, 51, and 52, where shown in the drawings, are not essential for either operativeness However, it

or completeness of the carton structure. has been found that taper 50 at the upper terminal edge of the rear wall outer end flap and taper 52 at the upper terminal edge of the front wall outer end flap are convenient modifications which have the result of eliminating upper terminal edge of the front wall outer end flap 6 during closing of the front wall outer end flap 6 uponthe rear wall outer end flap 7. This tendency to bind 'is eliminated by provision of taper 51 at the upper terminal edge of front wall outer end flaps 6, which may be present alone or together with taper 52, in such latter case providing a double taper to the upper terminal edge of the front wall outer end flap 6 in the preferred embodiment of this structural modification. In addition, the

tapers

50 and 52 serve the further function of maintaining the

outer end flaps

6 and 7 in better alignment upon sealing, since closure of the cover end flapsupon the front and rear wall

outer end flaps

6 and 7 when tapers 50 and 52 are present does not tend to push the end flaps out of proper alignment thereby causing the ultimate sealing to be less satisfactory than desired.

It is to be understood that the invention is not limited to the exact details of construction, operation, or exact materials or embodiments. shown and described, as abvious modifications and equivalents will be apparent to one skilled in the art, and the invention is therefore to be limited only by the scope of the appended claims.

I claim:

1. A carton formed of an integral blank cut and scored to provide a bottom member having end wall flaps hingedly connected to the ends thereof, a front wall member hingedly connected to one edge of said bottom member having front wall end flaps hingedly connected to the ends thereof, and a rear wall member hingedly connected to the other edge of said bottom having rear wall end flaps hingedly connected to the ends thereof, a cover hingedly connected to'the upper edge of said rear wall member provided with cover flaps comprising cover end wall panels and a cover front wall panel having flaps at its ends overlapped by and adhesively affixed tosaid cover end wall panels, and detachable means adhesively aflixing said cover front wall panel to said front wall member, said cover front wall panel being shorter than said cover end wall panels and having a web at each end extending below the edge of said cover front wall panel, and said cover front wall panel end flaps each having a portion thereof extending below the edge of said cover front wall panel, said extending portions being hingedly connected to said webs, whereby said cover front wall panel end flaps and said webs cooperate to provide frictional engagement with the corners of said carton retaining said coverin closed position after said means adhesivelyaffixing said cover front wall panel to said front wall member has been detached.

2. A carton formed of an integral blank cut and scored to provide a bottom member having inner end wall flaps hingedly connected to the ends thereof, a front wall member hingedly connected to one edge of said bottom member having front wall outer end flaps hingedly connected to the ends thereof, and a rear wall member forms of adhesive and other means of applying the ad- 8 hingedly connected to the other edge" of said bottom having rear wall outer end flaps hingedly connected to the ends thereof, a cover hingedly connected to the upper edge of said rear Wall member provided With cover flaps comprising cover end wall panels and a cover front Wall panel having flaps at its ends overlapped by and adhe- -sively affixed to said cover end wall panels, and detachable means adhesively afi-ixing said cover front Wall panel to said front wall member, said cover front wall panel being shorter than said cover end wall panels and having a generally triangular web with an oblique free edge, each end extending below the edge of said cover front wall panel, and said cover front wall panel end flaps each having a portion thereof extending below the edge of said cover front wall panel, said extending portions being hingedly connected to said Webs and each having an obliquely receding forward edge generally colinear with the oblique edge of one of said webs in the unerected blank, whereby said cover front wall panel end flaps and said webs cooperate to provide frictional engagement with the corners of said carton thereby'retaining said cover in closed position after said means adhesively aflixing said cover front wall panel to said front wall member has been detached.

3. An integral blank for forming a carton cut and scored to provide a bottom member having end wall flaps hingedly connected to the ends thereof, a front wall member hingedly connected to one edge of said bottom member having front wall end flaps hingedly connected to the ends thereof, and a rear wall member hingedly connected to the other edge of said bottom having rear wall end flaps hingedly connected to the ends thereof, a cover hingedly connected to the upper edge of said rear wall member provided with cover flaps comprising cover end wall panels, and a cover front wall panel having flaps at its ends adapted to be overlapped by and adhesively affixed to said cover end wall panels, and detachable means adapted for adhesively afiixing said cover front wall panel to said front wall member, said cover front wall panel being shorter thansaid cover end wall panels and having a web at each end extending below the edge said cover in closed position after said means adhesively aflixing said cover front wall panel to said front wall member has been detached.

4. An integral blank for forming a carton cut and scored to provide a bottom member having inner end wall flaps hingedly connected to the ends thereof, a front wall memaffixed to said cover end wall panels, and detachable means adapted for adhesively afiixing said cover front 'wall panel to said front wall member, said cover front wall panel being shorter than said cover end wall panels and having a generally triangular web with an oblique free edge at each end extending below the edge of said cover front wall panel, and said cover' front wall panel end flaps each having a portion thereof extending below the edge of said cover front wall panel, said extending portions being hingedly connected to said webs and each having an obliquely receding forward edge generally colinear with the oblique edge of one of said webs,

whereby said cover front wall panel end flaps and said webs cooperate to provide frictional engagement with the corners of a carton erected from said blank for retaining said cover in closed position after said means adhesively affixing said cover front Wall panel to said front wall member has been detached.

5. An integral blank for forming a carton cut and scored to provide a bottom member having inner end wall flaps hingedly connected to the ends thereof, a front wall member hingedly connected to one edge of said bottom member having front wall outer end flaps hingedly connected to the ends thereof, and a rear wall member hingedly connected to the other edge of said bottom having rear wall outer end flaps hingedly connected to the ends thereof, a cover hingedly connected to the upper side of said rear wall member provided with cover flaps comprising cover end wall panels and a cover front wall panel having flaps at its ends adapted to be overlapped by and adhesively affixed to said cover end wall panels, and detachable means adapted for adhesively aflixing said cover front Wall panel to said fnont wall member comprising a strip adapted to be adhesively affixed to said front wall member detachably connected to the edge of said cover front wall member by means of a tear strip defined by a pair of spacedapart severance lines, said cover front wall panel being shorter than said cover end wall panels and having a generally triangular web with an oblique free edge at each end extending below the edge of said cover front wall panel, and said cover front wall pane-l end flaps each having a portion thereof extending below the edge of said cover front wall panel, said extending portions being hingedly connected to said Webs and each having an obliquely receding forward edge substantially colinear with the oblique edge of one of said webs, said strip being provided at each end with a beveled corner contiguous with the oblique edges of said Webs, whereby said cover front wall panel end flaps and said webs cooperate to provide frictional engagement with the corners of a carton erected from said blank for retaining said cover in closed position after said means adhesively affixing said cover front Wall panel to said front wall member has been detached.

6. An integral blank for forming a carton cut and scored to provide a bottom member having inner end wall flaps hingedly connected to the ends thereof, a front wall member hingedly connected to one edge of said bottom member having front wall outer end flaps hingedly connected to the ends thereof, and a rear wall member hingedly connected to the other edge of said bottom having rear wall outer end flaps hingedly connected to the ends thereof, a cover hingedly connected to the upper edge of said rear wall member provided with cover flaps comprising cover end wall panels and a cover front wall panel having flaps at its ends adapted to be overlapped by and adhesively affixed to said cover end wall panels, and detachable means adapted for adhesively affixing said cover front wall panel to said front wall member comprising a strip adhesively affixed to said front wall member and detachably connected to the edge of said cover front wall member, whereby when said carton is erected, said cover front wall panel may be released by tearing off said strip, said cover front wall panel being shorter than said cover end wall panels and having a generally triangular web with an oblique free edge at each end extending below the edge of said cover front wall panel, and said cover front wall panel end flaps each having a portion thereof extending below the edge of said cover front wall panel, said extending portions being hingedly connected to said webs and each having an obliquely receding forward edge substantially colinear with the oblique edge of one of said webs, said stri p being provided at each end with a beveled corner contiguous with the oblique edge of one of said webs, whereby said cover front wall panel end flaps and said webs cooperate to provide frictional engagement with the corners of a carton erected from said blank for retaining said cover in closed position after said means adhesively affixing said cover front wall panel to said front wall member has been detached.

References Cited by the Examiner UNITED STATES PATENTS Re. 25,876 10/1965 Buttery et al.

1,963,639 6/ 1934 Ahlquist 229- 2,330,666 9/ 1943 Berkowitz 229- 3,125,280 3/1964 Henry 229-51 3,144,980 8/1964 Larson 22951 3,146,936 9/1964 Hodapp 229-51 3,197,114 7/ 1965 Holmes 229-5 1 JOSEPH R. LECLAIR, Primary Examiner.

DAVID M. BOCKENEK, Examiner.

Claims

1. A CARTON FORMED OF AN INTEGRAL BLANK CUT AND SCORED TO PROVIDE A BOTTOM MEMBER HAVING END WALL FLAPS HINGEDLY CONNECTED TO THE ENDS THEREOF, A FRONT WALL MEMBER HINGEDLY CONNECTED TO ONE EDGE OF SAID BOTTOM MEMBER HAVING FRONT WALL END FLAPS HINGEDLY CONNECTED TO THE ENDS THEREOF, AND A REAR WALL MEMBER HINGEDLY CONNECTED TO THE OTHER EDGE OF SAID BOTTOM HAVING REAR WALL END FLAPS HINGEDLY CONNECTED TO THE ENDS THEREOF, A COVER HINGEDLY CONNECTED TO THE UPPER EDGE OF SAID REAR WALL MEMBER PROVIDED WITH COVER FLAPS COMPRISING COVER END WALL PANELS AND A COVER FRONT WALL PANEL HAVING FLAPS AT ITS ENDS OVERLAPPED BY AND ADHESIVELY AFFIXED TO SAID COVER END WALL PANELS, AND DETACHABLE MEANS ADHESIVELY AFFIXING SAID COVER FRONT WALL PANELS TO SAID FRONT WALL