US2679970A - Folding carton - Google Patents

Description

June 1, 1954 Filed June 17, 1949 w. R. SAIDEL FOLDING CARTON 2 SheegLs-Sheet l June 1, 1954 w s DEL 2,679,970

FOLDING CARTON Filed June 17, 1949 2 Sheets-Sheet 2 +55 39?] I? 15 7 I I r Patented June 1, 1954 UNITED STATES saw rem OFFICE 2 Claims.

This invention relates to improvements in folding cartons and it consists of the matters hereinafter described in and more particularly pointed out in the appended claims.

The invention is more especially concerned with a carton produced from a one-piece, paper board blank, cut and scored to provide a central panel, defining the width of the carton, a panel foldably joined to each side of the control panel and forming the sides of the carton and sections, each of a width more than half the width of the central panel, joined to a side of a side panel and which sections overlap at their margins to form the bottom of the finished carton. Heretofore in such cartons, the central panel and portions of the side panels were cut and scored to provide parts which formed transverse partitions for the carton and the overlapping margins of said sections, which became the bottom of the carton, were adhesively united so that the blank could be made into a flat folded sleeve. These sleeves were supplied to the user thereof, who had to set them up into carton form for filling with the desired commodity.

A carton of this kind is illustrated and described in my co-pending application Serial No. 82,221, filed March 18, 1949, now Patent Number 2,519,760.

One of the objects of the present invention is to simplify and improve the structure of the before mentioned carton in certain respects so that the same may be shipped to the user in a flat, non-sleevelike blank, capable of being set up into a carton wherein the side walls are so connected by at least certain of the transverse partitions as to hold the blank in its set up condition without relying upon the adhesive joining together of the bottom sections for this purpose, as heretofore.

Another object of the invention is to provide, in a carton of this kind, a novel arrangement oi side walls and partition structure, wherein parts thereof interengage each other to hold the side walls against lateral spreading, as well as to hold the bottom sections against lateral separation.

Also, it is an object of the invention to provide a novel arrangement of tongues and slits on the side walls and certain of the partitions which, when engaged, also limit the position in one direction to an upright position, and certain tongues on one of the bottom sections and parts integral with said partition so interengage as to limit the movement of the said partitions out of the upright position in the other direction.

The above mentioned objects of the invention,

as well as others, along with the advantages thereof, will more fully appear as the specification proceeds.

In the drawings:

Fig. 1 is a perspective view of a folding one piece paper board carton embodying the preferred form of the invention, when in its set-up ready to use condition. a

Fig. 2 is a longitudinal vertical sectional View through the carton as taken on the line 2-2 of Fig. 1 and on substantially the same scale.

Fig. 3 is a bottom view of the carton appearing in Fig. 2.

Fig. 4 is a transverse vertical sectional View through the carton as taken on the line L4 and on a scale enlarged over that of Fig. 2.

Fig. 5 is a plan view of a cut and scored blank, from which the improved carton is made.

Fig. 6 is a fragmentary, detail, perspective view, on an enlarged scale, of parts toward one end of the carton and which will be more fully referred to later.

Fig. '7 is a horizontal, fragmentary sectional View, as taken on the line l-l of Fig. 6, on a scale enlarged thereover.

In general the improved folding carton is made from a one-piece cut and scored blank of paper board, such as. free bending chip board, bleached manila board, lined board, patent coated board, laminated board stock with greaseproof sheeting or the like.

Referring now in detail to that embodiment of the invention illustrated in the drawings, Fig. 5 shows the blank from which a carton, such as shown in Fig. 1, is made.

. Said blank is substantially rectangular in shape and it is provided with a pair of scored lines It and I l respectively and spaced equal distances inwardly from and parallel with said lines are other out through lines it, and IS, and score lines Ma and E30. respectively. That part of the blank between the lines 12, Ma and i3, l3a re spectively forms a mid panel M, which ultimate- 1y becomes the open top of the carton. The parts of the blank between the lines it! and I2, [2a and between the lines H and I3, I30 form the two side panels 15-45 of the carton and those parts of the blank outwardly of the lines #8 and i I form two end panels or sections it and El respectively, that jointly make up the bottom of the carton.

The mid panel is is cut transversely along lines i8, i9, 20 and 2| respectively. The lines l8, l9 and 2| terminatesubstantially at the cut and scored lines 12, Ha and i3, ltd while the line 2% extends beyond said last mentioned lines, as appears in Fig. 5.

The mid panel i l is provided with transverse lines 22, 23 and 24 of longitudinally spaced perforations which facilitate bending of the parts upon opposite sides thereof into right angled relation. These lines of perforation terminate at the lines I2, 12a and it, He. The cut and scored lines mentioned divide the center panel of the blank into two end sections 25 and 26 and intermediate sections Z'i, 2B and 2Q respectively which, in the set-up carton, form the two ends and three partitions for the carton, as best appears in Fig. l. The end sections 25 and 26, along with the intermediate section 2'1, have flange-like tabs 2511,2601; and 27a respectively, joined thereto by the transverse score lines 22, 24 and 23 respectively.

The ends of the sections 25, 25, 27,28and 29 are defined by certain of the scored lines |2a and I311, before mentioned and the ends of the flange like tabs 25a, 28a and 21a are defined by the cut lines i2 and i3, before mentioned.

At each end of the sections 25, 26, 21,28 and 253 respectively are wing extensions 30,3 l ,32, 33 and 34 respectively, joined to the said sections by'the scored lines E20, and Kid. The wing extensions mentioned, which are partially cut from the panels l5, 15, are of generally triangular shape, with truncated tops, the bases being considered as formed by the score lines 12a and 13a respectively.

By this arrangement of wing extensions 30 to 34 inclusivathere are defined between them, triangularly shaped portions 35, the apexes of which terminate substantially in the planes of the lines [2, 12a and [3, [3a respectively. In the finished carton these portions are disposed at the top of the side walls thereof as formed by the panels l5l5 and each portion 35 has a score line 35 about midway'the apex'andthe base thereof, the purpose of which will appear later. It is pointed out that at each end of the panels i5i5 are portions 35a arranged in line with but 'of half the size and shape of the portions 35. Said portions 3511 are formed with score lines 3641 similar to and in line with the score lines 36 and the purpose of said score lines 38 and 36a is to afford an outward expansion of the panels i5, i5, in the setting up of the blank intocarton form.

In each of the wing extensions 39, 32 and Si r-i respectively are short lines of longitudinally spaced perforations 22a, 23a, and 24 respectively,

that are parallel with but ciiset from the associated lines of spaced perforations 22, 23 and 24 by an amount slightly more than the thickness of the stock of the blank and thus there is defined in each of these extensions, a triangular tab 31.

The sides or" the wing extensions 3e, 3! and 32 and the sides of the wing extensions 33, 34, jointly considered, extend at angles of 90 to the plane of the cut score lines ii, in and I3, i3a respectively. A part of the sides, as well as the ends of said wing extensions are formed by cut lines 30:0, 31$, 32m, 33m and 3 35:, respectively and the remaining parts of said wing extensions are formed by fold lines 3531, 31y, 3211 33y and My respectively. Said fold lines extend from the cutscore lines i2, .i2c and i3, 3c to the fold lines 36 in the triangularly shaped portions of .the side panels |5i5. The lines just above mentioned best appear in Fig. 5.

The panels or sections 36 and ii of the blank areeach of a width greater than half the Width ofthe midpanel Hi. Parts of the free margin of the panel or section 16 are cut away to protransverse edge ilib thereof as a slit or cut iiic so that a portion of said panel or section l! adja- -.cent the edge 5% forms a bendable tongue 4011,

having the width of said edge and a length approximating the length of the slit or cut 400.

The edge a of each recess 46 and the associated slit or cut 40c jointly have a particular relation with respect to the width of the mid portion of the flange-like tabs 25a and 26d of the endsections 25 and 26.and which tab portions engage under the tongues 4007. as best appears in Fig. 6, when the blank is set up into carton form, as in Fig. 1.

One of the lateral edges of one of the recesses 4| forms a stop shoulder for engagement by the edge of the mid portion of the flange-like tab 21a of the section 2? when the blank is in the setup condition, above mentioned.

With the arrangement of the tabs '38, 39 and recesses 40 and 4!, as shown in Fig. 5, and as before described, the tabs 38-49 on the panel l6 are formed from those parts of the paperboard strip from which the blank is made, out from the panel or section ii to form the recesses Thus, there is no waste of stock in the production of successive blanks from a strip of paperboard stock.

Each end portion of each panel l5--l5 is cut through on lines 42 to form substantially triangularly shaped tongues 43, the apex ends of which face each other as best appears in Fig'. 5.

Each wing extension 36 and 3! for the sections 25-46 of the mid panel id, is cut through on U-shaped lines 4 3 to form tongues 45, each of which may be bent along its "base, which is parallel with and adjacent those portions of the score lines i2al2a associated with the sections mentioned. When the blank is set up into complete carton form, these tongues 43 and 45 register and are interengaged to and lock the side walls of the carton formed by the panels i5l5, to said wing extensions. When said tongues are so interengaged, they function, through said wing extensions and said sections 2525 to'hold the side Walls of the carton against lateral separation.

In setting up the blank shown in Fig. 5 into carton form, one convenient way is as follows: the side panels |5-l5 are folded along the lines 36-3S to extend downwardly from the center panel 14, after which the sections l1 and "5 are turned inwardly to fold along the lines H and H! so that the free margin of the section I! overlaps the free margin of the section it. In this turning inwardly of said section, the tabs 38 and 38 of the section 16, which register with the recesses 453 and 4! in the section 11, enter said recesses so as to overlap that part of the section I? between the inner edges of the recesses and the fold line H, until the inner end of said tabs engage the inner edges of said recesses, as best appears in Fig. 3. When these sections have been so disposed, they coact to provide the bottom of the carton of a width approximating the distance between the pair of cut and score lines l2-|2a and i3-l3a, with a double thickness central portion, formed by the overlapped margins, before mentioned, extending longitudinally of the bottom. By the interengagement of the recesses and tongues mentioned, the margins of said sections l6 and I! not only mutually support each other, but said sections are locked against relatively longitudinally shifting, and this without the use of an adhesive connection between said margins.

The thus far set up blank has the form of an open ended tube, the top of which is formed by the sections 25, 26, 21, 28 and 29 with the wings 3B, 3!, 32, 33 and 34 of said sections projecting laterally outward beyond the sides of the tube, as provided by the panels l5-l5.

When the blank is in its partially set up tubular form and it is desired to complete the same by hand operations, the various sections are manipulated to dispose them in end and partition forming arrangement shown in Figs. 1 and 2. As the manipulations of the sections 25 to 29 inclusive are generally the same, with the exception of the end sections 25 and 26, a detailed description of the manipulation of the one of said sections will sufiice for all and in this instance the section 25 is chosen as an example.

With the bottom of the thus far partially set up carton held against movement, say by holding the same in the left hand, downward finger pressure is imposed upon the section 25, near its flange 25a, the wings 30 swinging on the score lines I2a-I3a to turn upwardly as they start to swing inside the side walls 15. When said section 25 has been swung downwardly to be disposed at about an angle of 4 to the bottom of the carton, the tongues 43 come into register with the tongues 45 of said wings. Inward pressure is then imposed upon the registered tongues 43-45. As the section 25 is further swung toward and into a perpendicular position, to form one end of the carton, the apex ends of the tongues 43 enter behind that part of the wings 30, between those parts of the associated slits 44 that are parallel with the truncated edges of the wings 39 and said edges of said wing as appear in Fig. 7. When the section 25 reaches its perpendicular position, the edge of said part of each slit 44 engages in the spaced apart ends of the slits 42, as appears in Fig. 6, and this looks the partition in a perpendicular position to form one end of the carton. Also, by this arrangement, said partition is locked against further outward movement beyond this perpendicular position.

It is pointed out at this time that as the section 25 is initially depressed and the wings 39 thereof turn upwardly along the score lines l2a-i3a, said wings also swing about their hinged connection with the tabs 35, through the fold lines 30y, to a position to engage against the inside of the side walls l5, I5, as before mentioned. When said section 25 is disposed in its perpendicular position, forming one end of the carton and the tongues 43 and 45 are engaged, as before described, the section 23 now ties the two side walls l5-l5 together and holds them against lateral spreading.

Also, when the section 25 is in its upright or perpendicular position forming one end of the carton, its flange 25a will engage flatwise upon the bottom of the carton (as formed by the sections I 6 and I1) and a central portion of said flange swings past the associated tongue 40d of the section II to clear its edge and is then moved back to engage under said tongue. as best appears in Figs. 6 and 7. It is pointed out that there is suflicient flexure in the mid portion of the section 25 in its perpendicular position to permit the same to spring and permit the mid portion of said flange 25a to pass the edge of the tongue 40d and then be moved back under the same. When the flange 25a and tongue liid have been so engaged, they cooperate to prevent any swinging movement of said section 25 inwardly of the carton. When the section 25 has then been locked in its perpendicular position against movement outwardly or inwardly of the thus far set up carton, an end portion of the flange 25a is engaged upon a part of the section l6 and the other end portion of said flange is engaged upon a part of the section [1.

The thus far set up carton is turned end for end and the other end section 26 is manipulated in the same way as just described to provide the other perpendicular end of the carton.

The sections 21, 28 and 29 are then manipulated in the same way, that is by finger pressure upon their free margins, until they assume their perpendicular positions, wherein the associated wings 32, 33 and 34 thereof engage the inner surface of the side walls of the carton. In the case of the section 21, when it is in its perpendicular position, its flange 21a will engage flatwise upon the bottom of the carton, as provided by the sections l6 and i1 and the free edge of a part of said flange is engaged with a free edge of one of the tongues 38 of the section l6, Where it overlaps upon a part of the section l'l.

As the various sections 25, 26, 21, 28 and 29 are swung downwardly from their horizontal position, toward the upright position and as the wing extensions turn upwardly along the lines I2, I21; and I3, l3a, they will also fold along the lines 30y, 3iy, 32:1 33 and 34y respectively to swing in toward the inner surfaces of the walls or panels [5. By reason of the fold lines 36 and 33a, the triangular portions 35 and 35a. can bulge or expand outwardly, to permit the transition from the horizontal position to the vertical position, along the inner surfaces of the associated walls or panels [5, l5. 7

In the manipulation of the sections 28, 29, they swing downwardly in opposite directions and as each section is of a depth less than the depth of the carton, the bottom edges of these two sections will be disposed above the bottom of the carton, as appears in Figs. 1 and 2.

It is to be noted from said Figs. 1 and 2 that the wing extensions 30 to 34 inclusive provide a double thickness of paper board for each side wall and in connection with the respective sections 25 to 29 inclusively, tie said double thicknesses of paper board together, thus producing along each side of the carton, parts of angle bars cross section capable of withstanding heavy vertical compression loads without yielding or buckling.

Thus, the filled cartons when stacked, one upon the other, will amply protect the contents of the carton without damage due to the weight of the filled cartons above.

When the carton is in its completely set-up condition, as appears in Fig. 1, the spaces in the side walls left by the wing extensions 30 to 34 inclusive, are symmetrically spaced apart and adjacent spaces are separated by symmetrical parts as formed by the triangular portions 35 of said side walls.

:It is pointed out'that in the completely set-up cartons, parts of these portions 35 adjacent the fold lines 39 protrudeor bulgeslight'ly outwardly from the remainder of the side wall and do not lie flat against the portions 3 to 34 inclusive. Thus said parts of said portions act as cushions to absorb lateral shock for adjacent cartons on each side thereof and this affords further protection for the contents of the carton, which contents are often in themselves of an easily broken or damaged character.

It will also be noted that an edge of each tab 3'! engages the vertical face of the adjacent full partition and overlaps or overlies upon the ends of the flanges 25a, 26a and 21a, of the partitions 25, 2B, and 2?. This aids in strengthening the structure.

'Cartons of this kind, when containing the desired commodities, are generally wrapped in a transparent film-like sheeting and when the improved carton herein is so Wrapped, it presents a neat and attractive appearance and a good and sanitary display of the commodity.

A carton made in accordance with the above may be produced from a blank which does not involve a waste of the stock of which the blank is formed. In its set-up condition, as shown in Fig, l, the partitions materially strengthen the carton and permit a stacking of the filled cartons, one upon the other, in a manner withstanding considerable load pressure of the filled cartons above.

The partitions mentioned also serve the purpose of holding the two sides of the completed carton perpendicularly to the bottom and against bellying or bowing outwardly before wrapping the filled carton in a paper sheet or the like. Thus the necessity of tying a string or cord around the filled carton, before wrapping the same, is eliminated. As said partitions are integral parts of the carton itself and are joined or connected to the sides of the carton in the manner described, they afford a full visibility to each compartment between said partitions.

While in describing the invention, I have referred in detail to form, construction and arrangement of the various parts of the carton, the same is to be considered only in its illustrative sense and therefore I do not Wish to be limited thereto except as may be specifically set forth in the appended claims.

I claim as my invention:

1. In a folding one-piece paper board carton, side walls and a bottom composed of sections hinged to the side walls and, overlapping at their free margins longitudinally of the bottom, said margins of said sections being formed with transversely extending interengaging tongues and recesses holding said margins against relative longitudinal shifting, members extending between said side walls perpendicular to said bottom, each of said members having wing extensions each engaged with the inner surface of aside wall and each having a connection at the top with the side wall with which it is engaged, and means for securing at least certain of said wing extensions to said side walls, whereby said side walls are connected together through said members and hold said overlapping margins of the bottom sections against lateral separation.

2. In a folding one-piece paper board carton, side walls and a bottom composed of sections hinged to the side walls and overlapping at their free margins longitudinally of the bottom, said margins of sections being formed with transversely extending interengaging tongues and recesses holding said margins against relative longitudinal shifting, members extending between said side walls perpendicular to said bottom, each of said members having wing extensions each engaged with the inner surface of a side wall and each having a connection. at the top with the side wall with which it is engaged, and coacting engaged tongues and slits on at least certain of said wing extensions and said side walls, whereby said side walls are connected together through said members and hold said overlapping margins of the bottom ections against lateral separation.

References Gite-d in the file of this patent UNITED STATES PATENTS Number Name Date 525,585 Brown Sept. 4, 1894 717,089 Ferguson Dec. 30, 1902 1,686,521 Harrison Oct. 9, 1928 1,733,663 Hale Oct. 29, 1929 1,785,898 Hale Dec. 23, 1930 1,985,579 Reich Dec. 25, 1934 2,007,088 Jones July 2, 1935 2,0765% Holmes Apr. 13, 1937 2,319,380 Wells May 18, 1943 2,326,390 Piatt Aug. 10, 1943 2,328,615 Butterman Sept. '7, 1943 2,346,206 Broderick Apr. 11, 1944 2,372,351 Arneson Mar. 27, 1945 2,527,701 Buttery Oct. 31, 1950

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