US 2751136 A
Description (OCR text may contain errors)
June 19, 3%6 e. A. MOORE 2,753,136
CONTAINER BLANK AND CONTAINER Filed Dec. 18, 1953 FE. I 4. as I 54 /s' 3 Sheets-Sheet l INVENTOR ZESEJZBG June E9, 185% 5. A. MOQRE CONTAINER BLANK AND CONTAINER 3 Sheets-Sheet 2 Filed Dec. 18, 1953 INVENTOR June 19, 1956 as. A. MOQRE 9 -9 CONTAINER BLANK AND CONTAINER Filed Dec. 18, 1953 3 Sheets-Sheet 3' INVENTOR CONTAENER BLANK AND CQNTAINER George Arlington Moore, New York, N. Y.
Application December 18, 1953, Serial No. 399,000
13 Qlaims. (Cl. 229-17) shaped, furthermore the container blank having provisions for a body panel auxiliary closure structurally adapted for convenience in opening the container partly or wholly for dispensing purposes and reclose the container efiiciently.
Another object of the present invention resides in adapting the longitudinal body seam of the container to have functional co-acting relationship with portions of the end closures of the container.
A further object of the invention consists of a container having body wall portions adapted to form a closure, the said portions having co-acting resilient relationship with other wall portions to seal the container.
A still further object of this invention resides in a provision for a body side wall of the container being adapted to function as the top of the container after it is filled and closed, the said top wall being adapted to form an openaole auxiliary closure capable of being re-closed.
Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description, which, when taken in connection with the accompanying drawings, discloses a preferred embodiment thereof.
Referring to the drawings:
Fig. l is a plan view of the container blank;
Fig. 2 is a fragmentary enlarged sectional view taken on line 2-2 in Fig. 1;
Fig. 3 is a perspective view of the folded blank secured with a longitudinal seam;
Fig. 4 is a fragmentary view in perspective of the folded blank with a panel portion disposed in a downwardly bent position and two other portions slightly bent out of plane;
Fig. 5 is a perspective view of the container with one end closure formed and the opposite end partially closed;
Fig. 6 is a perspective view of the container with the filling end closed prior to being completed;
Fig. 7 is a perspective view of the completed container in proper position;
Fig. 8 is a fragmentary enlarged sectional view of a part of the container structure taken on line 8-8 in Fig. 7;
Fig. 9 is a fragmentary enlarged sectional view of another part of the structure taken on line 99 in Fig. 7;
Fig. 10 is a fragmentary enlarged sectional view of still another part of the structure taken on line 1010 in Fig. 7;
Fig. ll is a fragmentary enlarged sectional view of a further part of the structure taken on line 11-11 in Fig. 5;
Fig. 12 is a perspective view of the container being opened;
Fig. 13 is a fragmentary enlarged sectional view of the closure structure taken on line 13--13 in Fig. 12;.
Fig. 14 is a perspective view of the container partly opened for dispensing purposes, and
Fig. 15 is a perspective view of the container completely opened.
Conventional paper containers especially those commonly known as folding cartons are used extensively for the distribution of commodities such as bottled products, tooth paste tubes and many other pre-packaged products however, these containers when used for other types of commodities such as granular or powdered products must rely upon inner liners or bag-like inserts of folded sheet material within the container to hold such products. In addition to the use of such inner liners the containers are oftentimes outer wrapped with extraneous sheet materials to add further protection for the contents of the container. The operational methods employed for adding these materials to the container are cumbersome and costly.
The container of my invention is substantially a unitary structure so constituted as not requiring the use of inner and outer extraneous materials to safeguard the contents of the container.
As a preferred embodiment of the present invention the drawing (Fig. 1) illustrates a blank 4 of which the container is to be formed. The blank is preferably made of paper board material treated with suitable plastic materials, the treatment consisting of combining the board material with a pellicle of plastic sheet such as Pliofilm, Saran or polyethylene or the board may be coated with suitable plastic solutions of the same materials including polystyrene. These plastic materials have inherent qualities that render them thermoplastic. The board material may be laminated with foil, the foil being coated on one side with vinyl or polyethylene film material. Another type of treat ment may consist of waxing the board blank material. The treated blanks are adapted to be further processed by being printed, cut and creased in conventional machinery used by the industry in making folding cartons.
The blank 4 is provided with wall panels 5, 6, 7 and 8 of substantially rectangular shape which constitute the body side walls of the container. The panel area 6 is defined with two parallel score lines 9 and two transversely disposed parallel score lines 10. The panel 6 is centrally disposed between the panel areas 5 and 7. The panel 5 is defined with one of said score lines 9 and an outwardly disposed cut edge 11 and portions of the offset cut edges 12 transversely disposed thereto, a pair of parallel score lines 13 having terminal ends extended centrally with perforated cut lines 14 which terminate at the cut edges 12 and 15. The panel area 7 is defined with the other said score line 9 and an outwardly disposed parallel score line 16 and transversely thereto a pair of parallel score lines 17 having terminal ends centrally extended with a pair of oppositely disposed weakening cut lines 18 which terminate at the cut edges 15 and 19. The panel area 8 is defined with the score line 16 and an outwardly disposed parallel score line 20 and a pair of transversely disposed parallel score lines 21. The panel 8 is provided with a diagonally disposed score line 22 which forms a junction with one of the score lines 21 and slopes upwardly and outwardly to substantially the longitudinal center of the score line 20.
The panel areas 5 and 7 are each provided with pairs of oppositely disposed embossed stationary ledges 23 which extend inwardly of and parallel to the pairs of perforated cut lines 14 and 18. Two pair of these ledges extend outwardly from each of the score lines 9 and terminate substantially at the inwardly disposed junctions of score lines 13 and 17 with their related perforated lines 14 and 18. Another pair of ledges extend inwardly from the edge 11 of the panel 5 and the other pair extend inwardly of the score line 16 of the panel 7. Each of the upper and lower pairs of ledges 23 are disposed in longitudinal alignment. The said pairs adjacent the perforated cut lines 14 being spaced inwardly of these lines a distance substantially equivalent to three thicknesses of the blank material (Fig. 2). The other pairs adjacent the perforated cut lines 13 are spaced inwardly of these lines a distance substantially equivalent to two thicknesses of board material, therefore the perforated lines 14 are disposed outwardly of alignment with the perforated lines'l8 spaced substantially equivalent to one thickness of the blank material. The cut of theperforations of the lines 14 and 1S penetrate the blank from the exterior side short of the interior. side of the blank (Fig. 2)-and hence do notpenetrate the pellicle coating 4a on the blank. The longitudinal length of the cut lines 14' and 13 and the-length of the-ledges 23 are spaced substantially equivalent to the dimension of the width of the marginal'portions 24 extending outwardly from the score lines and 21 and-inwardly of the score lines Y25 and perforated score lines 26.
Therpanel area 8 is provided with an outwardly disposed marginal flange'areaportion 27 centrally divided with a perforated cut line 28- extending transversely from the score lineZll and outwardly to the notch 29. The
length of the flanged portion extends outwardly of each score line 10, and the margins of panel 8 each being divided by a perforated score line'26 disposed outwardly of score line 21 respectively. 'Panel7 is Provided with two opposed foldable panels 32 defined as being disposed outwardly of'a longitudinal creased score: line portion 17 having opposing ends extended with cut score line portions 18 that terminate-at transverse cut side edges 15 and 19 of the panel. Each panel is provided with a longitudinal straight edge portion 33 and two longitudinally opposed outwardly offset straight edge portions 34. The longitudinal length of edge portions 34 is coin cident with the length of cut score lines 18.
Panel 5 is provided with a pair of opposed foldable panels each defined as having a longitudinal creased score line portion 13 with terminal ends being extended with cut score lines 14-terminating at transverse side edges 12 and 15 of the panel 35. Each panel35 is provided with a'straight longitudinalend edge 36. Panel 5 is provided witha straight side edge portion 11 oliset. inwardly of side edges 12, the edges lliand 12 terminating at outer terminal ends of transversely disposed embossed ledges 23.
The body'37 of the container is formed as illustrated in Fig. 3 by foldingthe blank 4' on the score line 9 which borders the panel 5 to overlap the panel 6 and folding the panel'll on the score line 16 to overlap the panel 7.
The flange portion 27 overlaps a marginal portion of the panel 5 and the raised portion of the score line 16 disposed on the coated sidevof the folded blank is disposed in the recess formed by the edge 11 asithe panels 5 and 8 are joined together. This is accomplished by adhesively affixing a marginal portion 38 ofthefiange 27 to a'like' marginal portion of the panel 5 adjacent to its recessed edge 11. The cut portions 39 of the flange being disposed substantially in. line with the overlapped edge portions 12 of the folded panel 5. The other marginal portions of the overlappingflange-39 and 40 are not fastenedto the underlapped portion of the panel 5. The pellicle face 40 is disposed interiorly of thetolded blank wvallswhich are substantially spaced apart with the raised portions of the several groups of score lines including theembossed ledges 23. Conventional carton folding machinery may be employed to carryout the blankfolding ope'ration.
posed in alignment with the perforated liner;
The folded blank 37 illustrated in Fig. 4 shows the panel 32folded outwardly and downwardly of the body panel '7 which is overlapped by the folded panel 8. In this position the panels 32 are submerged in a bath of molten resinous adhesive to receive an overall coating 41 of such material and constitute a sealing gasket with which to close the container. This feature of the instant invention is fully disclosed in a co pending application Serial Number 394,376 filed November 25, 1953. During this operation the wing-back portions 24 and 31 extending from panels 6 and 8 may be initially broken out of plane on the score lines it), 25 and 21, 26 to facilitate the folding of these members when forming the end closures of the container.
The folded blanks 37 are self contained having complele adaptation to form the container 42 (Fig. 5 by simple folding operations. The con ainer 42 is illustrated with one closure formed which serves a substitute bottom to the container when being filled with its intended product and also provides a base for forming the opposite endclosure to complete the sealing of the container. The foldedblank 37 is opened by breaking the score lines '9, 16 and 20. This shapes the body walls of the container. "The closure at the opposite ends of the body walls is formed identically the same. The wing-backs are first folded both inwardly and outwardly the marginal portions 24 being bent'inwardly and downwardly on the score lines It and-2i and the portions 31 are bent outwardly and downwardly 0n the score lines 25 and 26.
The wing-back feature embodied in this invention is disbacks, disposed in flat edge to face engagements with fiat uninterrupted'rmrginal'portions of the interior body walls of the container. To accomplish this the upper corner edges of-the folded wing-hack portions 31 are dis- This relationship allows the panel members 32 to bend at sulzstantially. right angles over the said corner edges which further allows the sides 15 and i9. 30 of the folded wingbacks to be disposed in flat edge to fiat face abutments. with undisturbed rnarginal body wall portions of the containerand be transversely disposed in fiat engagement with the upturned faces 31 of the folded wing-backs (Fig. 6). The score lines 17 at the bent junctions of the picls 32 displaces material inwardly of the said abutmcnts and outwardlyiof. the interior surfaces of the body walls. The said some lines' 17 terminate in junctions adjacent to the bent'corncrs 25 of the folded wing-backs. This feature avoids interferences otherwise detrimental to the efiiciency 'of the wing-backs in their co-active relationship to the bodyand' closure walls of the container. This feature is embodied with respect to the ends of the panels 32 which constitute sealing gaskets for-use of the container closures. As the panel 32 is folded inwardly the wing backs are already folded flatly together at one side to be disposed in alignmentwith the cut lines-18, the panel is further folded'downwardly to meet theup-turucd portions 31 0f the flexibly spread wing-backs which are then substantially closed. by being further compressed. by the downward movement of the panel 32. The surfaces adjacent the corner portions 24 and upper corner portions'ol the panel are. in alignment with the shoulders of the stationaryledgest23 and the upperly disposed cut lines i=2 as illustrated in "Fig.6. The panel 35 is then folded inwardly and downwardly to overlap the previouslyfolded sealing gasket panel 32. The end portions 34 of the said 'panelbeingdisposed inedge to flat face engagements ment of material caused by bending the panel on the score line 13 is accommodated in the recess formed by the olfset end 11 of the panel 32 a: illustrated in Fig. 9. The ends 33 and 34 as well as both sides of the said panel is provided with a liberal film of thermoplastic dry adhesive as heretofore described.
The completed closure may be sealed by application of heat and pressure to the component parts of the closure to activate the said adhesive. After closing the container it may be passed between two belts one of which is preheated, the said belts applying the necessary pressure to heat and seal the closure efiiciently.
The completed container 42 is illustrated in Fig. 7. The body wall 8 is utilized to serve as the top of the container and provide an auxiliary sealed closure that may be opened for dispensing purposes. The end closures previously formed and sealed after filling the container, are utilized to serve as two opposed side walls 35 being strongly reinforced with secured multi-ply walls. This feature adds materially to the strength of the container structure to withstand container stacking pressures even though the container be fabricated of relatively light guage board material.
Enlarged sectional views of fragmentary parts of the three closure structures are illustrated in Figs. 8, 9, and ll. Paper containers can not be made efiicient if they do not have equally eflicient closures and this axiom is well recognized by the problems that confront and beset those skilled in the art; these problems are further increased when the containers are intended to be fabricated of semi-rigid fibrous board material. The said illustrations have been especially embodied in the drawings to afford a clear understanding of the structural feature embodiments of this invention and which have been hereinbefore described. In retrospect, the interior of the container 42 (Fig. 7) is free of exposed raw wicking edges of material. The bent corner junctions of the structural members are provided with means with which to seal off such edges. Fig. 8 shows the edge 11 protected by the plastic coated fillet 20 and the edge 12 being flatly seated to the plastic surface 40. Fig. 9 shows the edge 33 in contact with the plastic coated fillet 17, the edges 34 being flatly seated to the plastic film 4a. Fig. 10 shows the plastic covered loop 25 of the wing-back disposed interiorly of the sealed end closures of the container, the folded portions 24 and 31 having resilient co-action with the secured panel members 32 and 35. The folded wingbacks initially function as spring-like sealing ledges offering resistance against the thrust of the overlapping panels 32 and 35. After the closure is sealed the resiliency of the wing-backs is permanently maintained to serve as a shock absorber against any rough handling of the container and hence not Weaken the permanence of the closure seal. The side edges of the wing-backs and the edges 34 of the folded panel 32 areclosely confined together as illustrated in Fig. 11. The said edges are flatly engaged with the plastic face 4:; of the wall 5. The layer portions 24, 31 and 32 are clamped adjacent to their corner edges between the shoulder of the stationary ledges 23 and the bent sharp corners 14 of the folded panel 35. longitudinally between these junctions co-acting with the opposing side walls of the container.
The sealed container may be opened conveniently as illustrated in Figs. 12, 14 and 15. As heretofore described the container is provided with an openable auxiliary closure 8a which was originally utilized as a side wall 8 of the container during its filling and closing operations. Structural portions of the auxiliary closure coaot with structural portions of the permanent end closures when opened. A kitchen knife 44 (Figs. 12) may be employed to enter the slot 45 (Fig. 13) and pierce through the perforations 26 disposed centrally at the base of the slot and sever the wing-back portion 24 from its related portion 31 which remains secured to the wall 32. The
The resiliency of the wing-backs take place free portion 39 of the secured flange 27 is pulled outwardly and upwardly severing the perforated line 28 to peel the secured marginal portion 38 and free the said portion from the marginal portion of the wall 5. Having severed the wing-back portions, a portion of the closure wall 8a may be bent upwardly on the diagonal score line 22 which forms a hinge and provide an opening 46 in the container for dispensing the contents thereof. The sev ered wing-back portion 24 is an integral part of the opened closure member and provides a resilient flange with which to facilitate the reclosing of the container.
The container may be opened widely if desired as illustrated in Fig. 15 by repeating the opening operation as heretofore described on the opposite side of the container. The container may be repeatedly closed after being initially opened, the flanges 24 having resilient ac tion and hence imposes friction upon the secured wing portions 31 when the closure is restored in position to close the container substantially as illustrated in Fig. 12. When reclosing the container the detached outwardly disposed ends 47 (Figs. 14 and 15) of the flanges are again engaged with marginal portions of the interior walls of the container and hence contributes to the efficiency of the reclosing feature embodied in the auxiliary closure provided for the container.
The blank used to form the container as hereinbefore described is provided with structural feature embodiments capable of forming an efficient and economical container having qualifications to handle the distribution of a wide variety of consumer products and provide practical conveniences utility-wise for use of the consumer.
It is contemplated that in the broad concepts of this invention plastic or aluminum sheet material may be also employed with which to form the container, fibrous board being merely a preferred sheet material embodiment of the invention. It is further intended that the invention and many of its attendant advantages Will be understood from the foregoing description, and it Will be apparent that various changes may be made in the form, construction and arrangement of related parts Without departing from the spirit and scope of the invention or sacrificing any or all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.
1. A flat blank of foldable material adapted to be formed into a container having a rectangular cross sec tion and closed ends, said blank comprising a sheet of said material provided with creased score line portions having terminal ends extended with cut score line portions defining four rectangular wall panels arranged in laterally opposing alternate pairs and cut to define a first and second pair of opposing foldable end marginal wall portions integral of a first pair of said laterally opposing wall panels, and a first and second pair of opposing foldable panels integral of the second pair of said laterally opposing wall panels, said first pair of foldable margins of the first pair of wall panels each being defined with a longitudinal creased fold line defining the foldable corner end of the corresponding wall panel, and a longitudinal centrally disposed creased fold line spaced outwardly of and parallel with the first mentioned fold line so that said central fold line is" openly spaced equidistant outwardly of said corner end defining fold line and inwardly of the longitudinal outer end edge of the margins, the opposed side edges thereof being slit from adjacent panels outwardly transverse of said corner end defining fold lines, the second pair of said foldable margins of the first pair of opposing wall panels being substantially identical with said first pair of margins, and said centrally disposed longitudinal creased fold line of the second pair being perforated, the first pair of said foldable panels of the second pair of laterally opposed wall panels, each being defined with a base fold line having a longitudinal creased score line portion with terminal ends thereof being extended with cut score line portions, and said basefold line'being spacedoutwardly in offset relation with respectto the corner end defining fold lines of adjacent foldable margins, the longitudinal end of each of said first pair ofpanels being provided with an elongated straight edge portion'having outwardly opposed and extended longitudinal offset straight edge portions, thesecond pair of opposed foldable panels of said second pair of laterally opposed wall panels being defined with a longitudinal creased score fold line having extended cut score line portions, each of said fold lines of said second pair being offset outwardly with respect to the fold lines of said first pair of foldable panels, the first wall panel having said second'pair of longitudinally foldable margins that are provided-with said central perforated fold line, being provided with a vertical side end foldable flange having opposed transverse side ends terminating outwardly of the base fold lines and-being slit from side edges of the adjacent second pair of foldable margins, the second wall panel of said second pair of laterally opposed panels being provided with a straight vertical side edge portion being offset inwardly of upper and-lower straightedge portions that extend-outwardly to form outer side edges of said second pair of opposed foldable panels.
2. A flat blank as set forth in claim 2 wherein each panel of the second pair of laterally opposed wall panels being provided with four embossed rib-like horizontal ledges arranged in upper and lower longitudinally opposed pairs, each pair being spaced inwardly of and coincident with adjacent cut score extended lines of said base fold score lines of the foldable panels, said vertical side flange of the second Wall panel of said first pair of laterally opposed panels being provided with a substantially central transverse perforated line extended across the flange, and a creased score line being disposed diagonally across the second panel from said perforated line to a converging corner end of defining score fold lines of said wall panel-portionv 3. A flat blank asset forth in claim 1 wherein: the blank is surface coated with plastic protective material having dry adhesive-properties, said panel defining creased score line portions in the blank being displaced in offset planar relationship with respect to the constituted interior surface thereof, said longitudinal cutscore line portions of the creased score portions being penetrated inwardly of the exterior'surface of the blank, and each ofsaid cut scoreportions being extended longitudinally to be coincident -with one said'openly spaced equidistant dimension of the first mentioned first andsecond pair two opposed permanently sealed flat end closures for saidbody portion, each of said end closures being substantially identical after being-alternately folded to provide filling means for intended contents of the container, each said closure including foldable marginal portions of two opposed side walls of said body portion each being folded inwardly at substantially right angles to the corresponding side wall and a like marginal portion thereof defined with a longitudinal fold line in said foldedmargin-being folded upwardly,'outwardly anddownwardly upon the first folded integral-portion, the longitudinal end'edge of the second folded marginal portion being disposed in substantially coplanar relationship with the exterior face of said corresponding sidewall, therebyproviding a pair of inwardly opposed horizontal closure wall seating ledges, one ledge of eachalternate pair ofledges that are'disposed at top and bottom of saidbody'portionbeing provided with a perforated marginally divided fold line, said corresponding side-wall having the top and bottom folded ledges -each-with "-perforated fold lines, being provided-with a vertical side flangethat is folded atright" anglesover a corneree'dge of an adjacentside'wall'and being-a'dhesively united upon-a-s'elective exterior surface margin of said side-wall, the opposing Wall of said adjaccnt side-wall being provided with a full end closing panel, said panel being folded inwardly and downwardly upon the face of the upper disposed marginalportions ofsaid-seating ledgesand being adhesively united therewith, said adjacent side wall that is related with said side 'flange' being provided with a foldable panel, said panel being folded inwardly and downwardly upon the first vu endiclosing panel and being 'adhesively united therewith to complete said container, said side wall havingthe perforated pair of ledges and vertical flange being constituted to provide an openable and reclosable -the container, and upon releasing the adhesive bond of said united margin of the flange including the severing of said pair of opposed perforated ledges, said constituted closure wall may be manually opened for container dispensing-purposes, said first folded marginal portions of the severedledges being retained integrally upon opposing -sides of thewopened wall transverseof said flange, said 'secondfolded marginal portions of the severed ledges remainingadhesively united upon upper interior marginal -portions of said constituted two opposed reinforced side -wallsprovided by said formed end closures, said opened closure wall when restored to reclose the container being retained in closure forming relationship by the co-acting elfectsof the severed portions of the ledges including said side flange,tthereby. providing means in the structure of said container with which to effectively maintain the closure-walldniflat planar closed position.
6. A container according to claim 5 wherein said constituted closure wall being provided witha diagonal scored fold line extended froma converging corner end of said closure wall to substantially the center of the longitudinal corner folded edge of said flange, said flange being provided with-a vertical perforated line extended across the -width of the flange and meeting substantially a terminal end of said diagonal foldtline, and thereby provide means for'openingta sectionalwall portion of said closure wall bytdisengaging a' pre-determined portion of said flange definedby said perforated line and from its adhered engagement, and: by severing two marginal portions of one of said ledges :dispose'don the" top side of one initially formed elosure'which releases said sectional wall portion to openly fold upwardly on said diagonal score line, and
'therebyprovide. a triangular-shape opening in the top side of said container having an open area coincident with the area of said wall portion through which contents of the container may'be'dispensed, said opened wall portion 'having a retainedmargin ofsaid'severed ledge constituting anon-articulated flange to co-act with said other disengaged flange portion of the wall when restoring the closure, and thereby be effectively retained in flatly closed position for. protection of any remaining contents in said container.
7. A carton folded in collapsed form and being folded of a blank ofsheet material provided with scoredlines vdefining four rectangular Wall-panels and cut to define'a painof-roppose'd foldable twinv marginal portions integral witheach' of twoalternate wallpanels, and a pair of opposed" end closing foldablc. panels integral with each -;:of the otherof' said wall panels, which comprises one of saidother wall panels of saidblank being folded one I hundred eighty degrees on a scoreline transverseof longi- 'tudinalccor line's-'tocverlap one of said alternate wall panels and a portion of the second of said other wall panels, the folded one panel being provided with a straight end edge that is parallel with said folding line and having outwardly offset opposed straight edge portions thereof being extended outwardly in line with outer side edges of an opposing pair of corresponding foldable panels, the opposite alternate wall panel being folded one hundred eighty degrees on a parallel score line to overlap the other portion of said second other wall panel, said folded opposite alternate panel being provided with a projected end flange defined with a score line that is disposed to lie along and in substantial contact with the face of said straight end edge portion of the first folded panel, and an adjacent interior marginal surface portion of the overlapping flange being adhesively secured upon a corresponding exterior surface of the first folded panel, said score line of the flange having opposed ends thereof terminating in inwardly spaced relation to slit line portions that extend to each outer opposed side end of said flange, the longitudinal score fold lines of said alternate wall panels for the foldable marginal portions thereof being disposed in longitudinal alignment with each other, the longitudinal score fold lines of the non-folded other wall panel for the opposed foldable panels thereof being offset outwardly with respect to said longitudinally aligned score fold lines, the longitudinal score fold lines for the opposed foldable panels of the first folded wall panel being oifset outwardly of said score fold lines of said non-folded other wall panel, the longitudinal end edge of each opposed foldable panel of the non-folded wall panel being provided with an elongated straight edge portion having terminal ends extended with outwardly oflset straight edge portions to transverse side edges of the panel, each of the foldable twin marginal portions adjacent each side end of said adhesively secured flange being defined with a longitudinal perforated score fold line disposed equidistant between said score fold line of the corresponding wall panel and the outer disposed longitudinal end edge of the margin.
8. A carton as set forth in claim 7 wherein the folded carton is opened tubular shape to provide four side walls arranged in opposing pairs, a pair of longitudinally opposed foldable margins of said alternate side wall forming panels being folded inwardly, upwardly, outwardly and downwardly to provide a pair of inwardly opposed closure wall seating resilient ledges, the longitudinal end edge of each outwardly folded margin of said ledges being disposed along and upon the corner folded edge of the corresponding side wall, and the opposed side edges of the ledges being flatly abutted upon interior surface margins of a pair of opposed adjacent side walls, the foldable panel having said ofiset straight edge portions being folded inwardly and downwardly upon said ledges so that said outer offset straight edge portions of said panel are disposed in coplanar surface relationship with the adjacent abutted side edges of the ledges, the base score fold line of said folded ledges being offset downwardly with respect to the base score fold line of the folded end closing panel so that said abutted side edges of the ledges will remain in flat surface engagement upon interior surface margins of one adjacent side wall, the other foldable panel of the second adjacent side Wall being folded inwardly and downwardly upon the exterior surface of said first folded end closing panel, and the base score fold line of said last folded panel being disposed upwardly in oflset relation to the base fold line of the lapped end closing panel so that the abutted opposite side edges of the ledges and the abutted offset edge portions of the folded end closing panel will remain flatly engaged upon the corresponding interior surface margins of the second adjacent side wall, the surface to surface engagements upon said ledges and panels being adhesive 1y united together in seam forming relationship to constitute a permanent closure of said carton.
9. A carton according to claim 8 wherein the carton is filled with intended contents through the remaining" open end opposed to said permanent closure, said open end being closed and permanently sealed by identical folds of said opposing pairs of marginal and panel portions of side walls and thereby constitute a closure identical with the first folded permanent closure of said carton, one folded ledge disposed in each said closure being provided with a perforated score fold line that defines the inwardly disposed longitudinal corner fold of the ledge, a transversely disposed folded flange of the side wall having the opposed folded ledges being marginally adhered upon the exterior surface of a transverse adjacent side wall of the carton, said side wall having said pair of opposed ledges with perforated corner folds being constituted with means that provides an openable closure wall of said carton exclusive of said end closures thereof, said closure wall being opened by disengaging said marginally adhered portion of the flange and severing said pair of ledges along their respective perforated corner folds, thereby releasing said closure wall to open upwardly upon its initially folded base score fold line, the first folded inwardly disposed marginal portions of the pair of severed ledges each being retained integral of said opened wall portion to form a pair of opposed downwardly disposed transverse flexible flange portions thereof, the last folded marginal portions of the severed ledges remaining adhered upon upper marginal interior surface sides of the initially formed opposing closure walls, said flange portions of the opened closure wall including the transversely disposed disengaged flange having co-acting relation when restoring the closure wall as to retain said closure wall in re-closure position to effectively close said carton repeatedly in closure forming relationship.
10. In a container folded of paper board cut and scored to provide panel members so connected as to define a container of rectangular shape, and including one side wall panel member being provided with a pair of opposed end folded severable margins that are self-superimposed, and the outer disposed margin of each of said superimposed folds being adhered upon the interior corresponding margin of an inner disposed folded panel that forms a permanent end closure at an alternate opposed end of said container after the container is filled with intended contents, said one side wall panel member being of single thickness and having a longitudinal folded flange adhered selectively upon a corresponding margin of the exterior of an adjacent transverse side wall of the container so that said panel member constitutes an openable and re-closable wall to be utilized for container dispensing purposes exclusive of said opposed end closures, said wall being provided with a diagonal score fold line extending from a converging corner end of the wall and meeting with a pro-positioned perforated line extending transversely of said longitudinal flange portion of said wall, said opening of the container being effected by lifting said defined portion of the longitudinal flange to sever said perforated line and disengage its adhered margin from said adjacent side wall and the adjacent self-superimposed margins being severed to separate said margins along the bottom longitudinal corner folded end thereof transverse of the plane of said wall and thereby release a portion of said single thickness panel member to open upwardly on said diagonal fold line and thereby expose a substantial temporary opening in the top side of the container, one marginal portion of the severed margins being retained integrally with the opened wall portion, the other marginal portion of the severed margins remaining adhered upon said folded panel of said permanent closure, and upon disengaging the remaining adhered portion of said longitudinal flange and severing the opposed superimposed margins, thereby provided additional means for the panel member to be opened completely by hinging upon its longitudinal corner fold line disposed opposite to said longitudinal disengaged flange portion thereof, and thereby open said container tcveapose the full open' area'of the top-side thereof for complete scavenging purposes to facilitate the removal of any remaining contents from the container.
11. In a carton as set forth'in'claim 10 wherein the interior surface of the wall structure of thecontainer is provided with a coating of activator thermoplastic material that insulates said'panel members and superimposed margins against absorption from container contents, and including means upon being activated to effect the adhering together of saidmargins and closure forming panel members of the containerenclosure wall structure to be engaged in seam forming relationship.
12. 'A container formed of a' folded blank of sheet material comprising a tubular'body portion of substantially rectangular cross section having tourside walls and a permanently sealed flat end closure for said body portion, and said container beingfilled through an opposed open and oi the body:portion-withintended contents, said open and thereafter being closedandipermanently sealed to constitute a substantially. identical 'opposediilat end closure, said containerincluding one side wall of the body portion being arranged in structure to-constitute the top side of the filled. container adapted to be'opened for dispensing said contents thereof, which comprises said one side wall being provided with two opposed'end folded marginal portions, each folded margin having a portion thereof extended downwardly at right angles of said wall and a like integral marginal portion thereof being extended upwardly from the bottom longitudinal corner edge of the fold in self-superimposed flat. surface relationship, so that the longitudinal end edge of the upwardly folded portion is disposed substantially in coplanar rela tion with the outer transverse face of said one wall, said bottom longitudinal corner folded edges of said pair of folded margins each being provided with a limited impressed perforated severable line, and the outer surface of each said upwardly folded margin-beingadhered upon an upper corresponding marginal portion of the inner disposed end closing panel wall of each said. opposed identical end closure, said one side wall being provided with a longitudinal marginal flange portion being folded and marginally adhered upon an upper exterior longitudinal margin of an adiacent side wall, said adaptation for open ing saidone wallbeing constituted byseveringto separate said wolf-superimposing margins along -their -respect-ive perforated corner fold lines, andlifting said longitudinal flange upwardly to disengage its adhered-marginalportion from said adjacent side wall, thereby releasing the one wall to open upwardly upon its original longitudinal fold line to expose an opening in the top side of the container of an area coincident with the area of said opened wall through which to dispense contentsthereof, and upon restoring said Wall to reclose said container the severed integral marginal portions and disengaged flange of the reclosure wall having co-actingeffects to close marginal sides thereof and thereby retain said wall in flat planar closure forming relationship with said body portion-of -the container.
13. A container as set forth in claim 12 wherein said one wall and its related longitudinal'fiange being pro- 'vidcd with means to be opened in-part by severing one of said self-superimposed marginal portions adjacent one end of said wall and'lifting a-portion ofsaid-flange from its adhered correspondingmarginalportionto release said wall portion to be raised on -a' fold line providedtherein to expose a substantially triangularshape opening in the top side of said container-having-an openarea coincident with the fiat wall area of the opened -wall portion.
ReferencesCited inthe file of this. patent UNITED STATES "PATENTS