US3369728A - Ventilated fruit or vegetable container - Google Patents

Description

Feb. 20, 1968 M. B. ROYCE, 8"

VENTILA'ITED FRUIT OR VEGETABLE CONTAINER Filed Nov. 23, 1965 4 SheetsSheet 1 INVENTOR MARK B. ROYCE mwwwwau ATTORNEYS Feb. 20, 1968 M. B. ROYCE VENTILATED FRUIT OR VEGETABLE CONTAINER 4 Sheets- Sheet 2 Filed Nov. 23, 1965 INVENTOR I mmkc mm Wm ooTv BY Mm ATTORNEYS Feb. 20, 1968 M. B.YROYCE 3,369,728

VENTILATED FRUIT OR VEGETABLE CONTAINER Filed Nov. 23, 1965 4 Sheets-Shet a INVENTOR MARK B. ROYCE' mmmmm ATTORNEYS Feb. 20, 1968 M. a. ROYCE VENTILATED FRUIT OR VEGETABLE CONTAINER INVENTOR MARK B ROYCE BY vvflfiw P3m Ql/L3nq 4 Sheets-Sheet 4 Filed Nov. 23, 1965 ATTORNEYS.

United States Patent f 3,369,728 VENTILATED FRUIT 0R VEGETABLE CONTAINER Mark B. Royce, Ho-Ho-Kus, N.J., assignor to Continental Can Company, Inc., New York, N.Y., a corporation of New York Filed Nov. 23, 1965, Ser. No. 509,301 9 Claims. ((11. 229-23) ABSTRACT OF THE DISCLGSURE v This dis-closure relates to a novel ventilated container or carton of the type adapted to receive peaches, apples, and similar fruit or vegetables, and is particularly directed to a novel container which is highly reinforced, has unusually high ventilation characteristics, will not bulge under the influence of a packaged product, and insures adequate ventilation of packaged articles when stacked or stored with similar containers while in storage or shipment.

A primary object of this invention is to provide a novel ventilated container which includes a container body defined by a bottom Wall, a pair of spaced side walls and a pair of spaced end walls, each of the side and end walls being formed from a pair of inner and outer panels, a reinforcing panel positioned between the inner and outer panels of each of the side walls to prevent the bulging thereof under the influence of packaged products, the reinforcing panels each being provided with a plurality of elongated ventilation openings having a predetermined longitudinal axes, ventilation openings in each of the panels of the side walls in registration with each other and with the ventilation openings of an associated reinforcing panel whereby articles packaged in the container can be adequately ventilated, a cover associated with the container, the cover including a top panel, and ventilation openings in the top panel and the bottom wall of the container which are in axial alignment whereby other identical containers in stacked relationship with the container provide free access for air or other fluid medium through the stacked containers in a generally vertical direction from top to bottom or vice versa.

A further object of this invention is to provide a novel ventilated container of the type just described in which the cover includes means for maintaining adjacent identical containers in spaced relationship, thereby providing free access for air or other fluid medium through the adjacent containers in a generally horizontal direction from one side wall to the other and vice versa.

A further object of this invention is to provide a novel ventilated container of the type immediately above described in which the cover may include pairs of adjacent side end walls, the side end walls of the cover each being formed from a pair of inner and outer panels and defining a corner therebetween, at least one panel of each of the adjacent side and end walls including a terminal flap, one panel of an adjacent side wall being folded against an adjacent end wall to define a three-ply corner portion therewith, and another panel of the adjacent end wall being folded against the adjacent side wall to define a three-ply corner portion therewith whereby each of the cover corners are reinforced by at least a three-ply thickness of material.

A further object of this invention is to provide a novel ventilated container of the type just described in which one of the cover panels includes a tab, a slot in the top wall of the cover, and the tab being interlockingly received in the slot to maintain the cover in assembled relations-hip in the absence of adhesive or other auxiliary securing means.

3,369,728 Patented Feb. 20, 1968 ice With the above and other objects in view that will hereinafter appear, the nature of the invention will be more clearly understood by reference to the following detailed description, the appended claimed subject matter, and the several views illustrated in the accompanying drawings.

In the drawings:

FIGURE 1 is a top perspective view of a novel ventilated container constructed in accordance with this invention, and illustrates a cover closing a container body and a plurality of ventilation openings of the container body.

FIGURE 2 is an enlarged fragmentary sectional view taken generally along line 2-2 of FIGURE 1, and illustrates reinforcing panels between each of two side panels defining a side wall of the container body, and a cover ventilation opening in registration with a ventilation opening in a bottom wall of the container body.

FIGURE 3 is an enlarged sectional view taken generally along line 3-3 of FIGURE 1, and illustrates the means interlockingly securing the cover to the container and ventilation openings of the side panels in registration with an opening of the reiforcing panel.

FIGURE 4 is a top plan view of a container blank from which the container of FIGURES 1-3 is formed, and illustrates a plurality of selectively slotted panels and fold lines about which the panel-s are folded to place selective ones of the ventilation openings in registration.

FIGURE 5 is a front perspective view of the blank of FIGURE 4, and illustrates the blank during the initial stages of the folding thereof to form the container.

FIGURE 6 is a top perspective view of the ventilated container and clearly illustrates one of a pair of the reinforcing panels prior to being introduced into the container body.

FIGURE 7 is a top plan view of a blank from which the cover of FIGURES 13 is formed, and illustrates four pairs of panels bounding a top wall which are foldable to form a generally two-ply cover skirt.

FIGURE 8 is a top perspective view of the blank of FIGURE 7, and illustrates the position of various ones of the panels and flaps during the initial folding of the blank to form the cover.

FIGURE 9 is a top perspective view of the blank of FIGURE 8, and illustrates means for securing the various panels and flaps of the cover in assembled relationship in the absence of adhesives or similar auxiliary securing means.

A novel ventilated container constructed in accordance with this invention is best illustrated in FIGURES 1-3 of the drawings and is generally referred to by the reference numeral 10. The ventilated container 10 includes a container body 11 and a cover 12, each of which is constructed from heavy corrugated paperstock material. The container body 11 is formed from a container blank 13 (FIGURE 4) while the cover 12 is formed from a cover blank 14 (FIGURE 7).

Referring first to FIGURE 4 of the drawings, the container blank 13 is of a generally rectangular configuration, and includes a plurality of panels 16 through 23 and flaps 24 through 28. The panels 16 through 19 form outer or exterior panels of the container body 11, as will be more apparent hereafter, while the panels 20 through 23 form inner or interior panels of the container body.

The panel 16 is a first outer end panel defined by a transverse edge 30, an opposite parallel transverse fold line 31, and a pair of spaced parallel longitudinal fold lines 32, 33. A pair of ventilating openings 34, 35 in the form of elongated slots are formed in the panel 16 in parallel relationship to each other, to the transverse edge 30, and to the transverse fold line 31. A hand-grip opening 36 is formed centrally of the panel 16 adjacent the fold line 32.

The panel 17 is an outer side panel and is defined by the transverse fold line 31, an opposite parallel transverse fold line 37, and a pair of spaced parallel longitudinal fold lines 38, 40. Four ventilating openings 41 through 44 in the form of elongated slots are provided in the panel 17. The longitudinal axes of the ventilating openings 41 through 44 converge toward the fold line 41 The panel 18 is a second outer or exterior end panel which is defined by the fold line 37, an opposite parallel transverse fold line 45, and a pair of spaced parallel longitudinal fold lines 47, 48. A pair of ventilating openings or slots 50, 51 and a hand-grip opening 52 are formed in the panel 18 and correspond in shape and relative position to the shape and relative position of the openings 34 through 36 of the outer end panel 16.

The panel 19 is a second outer or exterior side panel and is defined by the fold line 45, an opposite parallel transverse fold line 53, and a pair of spaced parallel longitudinal fold lines 54, 55. Four ventilating openings or slots 56 through 59 are formed in the exterior side panel 19, and the configuration and position of the slots 56 through 59 correspond to the configuration and relative positioning of the slots 41 through 44 of the outer or exterior side panel 17 The panel 28 is a securing panel adapted for attachment to the panel 16 in a manner to be described more fully hereafter. The panel or flap 28 is defined by the fold line 53, an opposite parallel transverse edge 60, and a pair of short longitudinal edges 61, 62.

The panel 20 is an inner or interior end panel, and is defined by a longitudinal edge 63, a spaced parallel longitudinal fold line 64, and a pair of transverse spaced parallel edges 65, 66. The panel 20 is connected to the panel 16 by a narrow bridging or connecting portion 67 between the fold lines 32 and 64. A pair of ventilating openings or slots 70, 71 are formed in the panel 20 adjacent the longitudinal edge 63. The ventilating openings 70, 71 are brought into overlying aligned relationship with the respecting ventilating openings 34, 35 of the end panel 16 in a manner and for a purpose to be described more fully hereafter.

The panel 21 is an inner side panel which is defined by a longitudinal edge 72 parallel to a longitudinal fold line 73 and a pair of transverse edges 74, 75. The panel 21 is joined to the panel 17 by a connecting or bridging portion 76 between the fold lines 38 and 73. A plurality of elongated ventilating openings or slots 77 through 80 are formed in the panel 21 and converge toward the edge 72. The ventilating openings 77 through 80 overlie and register with the ventilating openings 41 through 44 of the panel 17.

The panel 22 is an inner end panel which is defined by a longitudinal fold line 81, a parallel longitudinal edge 82, and a pair of spaced parallel transverse edges 83, 84. The panel 22 is joined to the panel 111 by a bridging or connecting portion 85 between the fold lines 48 and 81. A pair of ventilating openings or slots 56, 87 are formed in the panel 22 and are adapted to register with the respective ventilating openings 50, 51 of the panel 18.

The panel 23 is an inner or interior side panel which is defined by a longitudinal edge 88, an opposite parallel longitudinal fold line 90, and a pair of transverse edges 91, 92. The panel 23 is joined to the panel 19 by a narrow bridging or connecting portion 93 between the fold lines 54, 90. A plurality of ventilating openings or slots 94 through 97 are formed in the panel 23 and are adapted to register with the respective ventilating openings 55 through 59 of the panel 19.

The flaps 24 through 27 are foldable to define a bottom wall of the container body 11, as will be apparent more fully hereafter, and are joined to the respective panels 16 through 19 along the respective longitudinal fold lines 33, 40, 47 and 55.

The flap 24 is defined by the fold line 33, an opposite parallel longitudinal edge 98, and a pair of transverse 4 edges 1%, 101. A half-slot 192 is formed in the flap 24 substantially medially of the longitudinal edge 98.

The flap 25 is defined by the fold line 40, an opposite parallel longitudinal edge 163, and a pair of transverse edges 1114, 105. A half-slot 1196 is formed in the flap 25 substantially medially of the longitudinal edge 103.

The flap 26 is defined by the fold line 47, an opposite parallel longitudinal edge 107, and a pair of transverse edges 1118, 119. A half-slot 111, corresponding in shape to the slot 1112 of the flap 24 is formed in the panel 26 substantially medially of the longitudinal edge 107.

The flap 27 is defined by the fold line 55, an opposite parallel longitudinal edge 112, and a pair of transverse parallel edges 113, 114. A half-slot 115, corresponding in shape to the half-slot 106 of the fiap 25, is formed in the panel 27 substantially medially of the longitudinal edge 112.

The blank 13 of FIGURE 4 is formed into the container body 11 by folding the blank in the manner best illustrated in FIGURE 5 of the drawings. The outer panels 16, 17, 18 and 19 are folded along the respective fold lines 31, 37 and 45 to impart a generally tubular configuration to the blank 13. The flap 28 is folded along the fold line 53 and stapled or otherwise conventionally secured to the interior of the panel 33. The flaps 26 and 24 are then folded about the respective fold lines 47, 43 until the edges 107, 98 thereof are in opposed relationship and the half-slots are in alignment. The flaps 25, 27 are thereafter folded into underlying relationship to the flaps 24, 26 and staples or similar securing means are employed to secure the flaps 24 through 27 together forming a bottom wall, generally referred to by the reference numeral 117 (FIGURE 3).

After the blank 13 has been so folded and while the panels 20 through 23 are still positioned in an upwardly projecting direction (FIGURES 5 and 6), a reinforcing panel 120 is inserted into the container body 11 adjacent each of the side panels 19, 17, as is best illustrated in FIGURE 6 of the drawings. Each of the reinforcing panels 121i is constructed from wood or similar material and includes a plurality of upright slats 121, 122, 123 and a pair of horizontally disposed parallel slats 124, 125. The slats 121 through 125 are secured to one another by staples or similar securing means (unnumbered) to define one or more elongated ventilating openings or slots 126, 127. The ventilating openings 126, 127 are each at least as wide as the maximum transverse dimension of the ventilating openings 41 through 44, 56 through 59, 77 through 80, and 94 through 97 formed in the respective panels 17, 19, 21 and 23.

After the panels 120 have been inserted into the interior of the container body 11, the interior end panels 20, 22 are folded inwardly into overlying relationship to the respective outer end panels 16, 19 (FIGURE 2). The inner side panels 21, 23 are similarly folded inwardly into overlying relationship to the reinforcing panels 120 whereby each reinforcing panel 120 is sandwiched between an associated pair of the panels 19, 23 and 17, 21 (FIGURE 2).

Upon the folding of the container blank 13 in the manner heretofore described, the ventilating openings 34, 35 register with the ventilating openings 70, 71 while the ventilating openings 50, 51 register with the ventilating openings 36, 37, respectively (FIGURES 1 and 2). The half- slots 192, 106, 111 and 115 define a single elongated ventilating opening, generally referred to by the reference numeral 131! (FIGURE 2), in the bottom wall 117.

Referring now to FIGURE 7 in detail, the blank 14 for forming the cover 12 of the ventilating container 10 includes a top panel or wall 129 defined by a pair of spaced parallel longitudinal fold lines 131, 132 and a pair of spaced parallel transverse fold lines 133, 134. A pair of slits 135, 136 defining a connecting portion 137 therebetween are formed adjacent an intersection of each of the fold lines 131 through 134. The slits are disposed along the respective associated fold lines 133, 134 while the slots 137 are positioned inwardly therefrom. A generally centrally located ventilating opening 138 is also formed in the top panel 129.

An outer or exterior side panel 140 and an interior or inner side panel 141 are joined to the top wall 129 along the fold line 131 and are connected to each other by a bridging portion 142 between a pair of partial score lines 143, 144. Flaps 145 and 146 are secured to opposite longitudinal end portions of the panel 141 along respective fold lines 147, 148.

Another outer or exterior side panel 150 and an inner or interior side panel 151 are joined to the top wall 129 by the fold line 132 and to each other by a narrow bridging or connecting portion 152 defined by a pair of parallel partial score lines 153, 154. Flaps 155 and 156 are joined to the panel 151 along respective fold lines 157, 158.

An outer or exterior side panel 160 and an inner or interior side panel 161 are joined to the top wall 129 along the fold line 134 and to each other by a bridging portion 162 defined between a pair of partial score lines 163, 164. A pair of tabs 165, 166 project beyond an edge 167 of the panel 161. A generally inverted C-shaped out line 168 i formed in the panel 161 and terminates in the bridging portion 162 at the fold line 163. The inverted C-shaped cut line 168 defines an interlocking tab 169. A generally semi-circular finger-receiving opening 170 is formed in the panel 160. The tabs 165, 166, 169 and the finger-receiving opening 170 function in a manner to be described more fully hereafter.

An outer end panel or exterior end panel 180 and an inner or interior end panel 181 are joined to the top panel 129 along the fold line 133, and are joined to each other by a bridging or connecting portion 182 defined between a pair of partial score lines 183, 184. Tabs 185 and 186 project beyond a transverse edge 187 of the panel 181. A generally C-shaped out line 188 is formed in the panel 181 and terminates at the partial score line 183 to define an interlocking tab 189. A finger-receiving opening 190 i formed in the panel 180.

Flaps 191, 192 are joined to opposite longitudinal edges of the panel 160 along respective fold lines 183, 194. Cut. lines 195, 196 separate the respective flaps 146, 191 and Similar flaps 197, 198 are secured by respective fold lines 199, 200 to the opposite longitudinal edge portions or" the panel 180. Cut lines 201 and 202 separate the respective flaps 145, 197 and 198, 155.

The cover blank 14 of FIGURE 7 is formed into the cover 12 by folding the blank 14 in a manner best illustrated in FIGURES 8 and 9 of the drawings to which attention is now directed. The panels 160, 180 are folded along the respective fold lines 134, 133 until the panels 160, 180 are generally normal to the top wall 129. The flaps 191, 197 and 192, 198 are folded along the respective fold lines 193, 199, 194 and 200 and are thereby directed into opposed relationship, as is best illustrated in FIGURE 8 of the drawings. The panels 140, 150 are folded along the respective lines 131, 132 while each of the flaps 145, 146, 155 and 156 are folded in a direction of the unnumbered headed arrows in FIGURE 8 until each of these latter flaps occupies a position illustrated by the flaps 155, 156. The panels 151, 141 are thereafter folded inwardly to the position illustrated in FIGURE 9 of the drawings bringing the flaps 155, 145 adjacent the panel 180 and the flaps 146, 156 adjacent the panel 160. The panels 161, 181 are then folded inwardly in the direction of the unnumbered headed arrow in FIGURE 9 until the tabs 165, 166, 185 and 186 interlock between the slits 135, 136. The natural resilience of the material of the blank 140 permits the portions 137 of the top wall 129 between the slits 135, 136 to bulge slightly outwardly (FIGURE 1) to receive the tabs 165, 166, 185 and 186. Due to this construction of the cover 12, the generally rectangular configuration thereof is maintained in the absence of adhesive or any other type of auxiliary securing means and, more important, each corner (unnumbered) of the cover 12 is composed of a three-ply structure which imparts added strength and rigidity to the cover.

After products such as peaches, apples or similar fruits or vegetables, have been packaged in the container body 11, the cover 12 is seated upon the container body 11 in the manner best illustrated in FIGURES 1 and 3 of the drawings. The cover 12 is interlocked upon the container body 11 by means of the interlocking tabs 169 and 189 which pass through the hand-gripping openings 36, 52 and are sandwiched between the container body end panels 16, 20 and 18, 22, as is best illustrated in FIGURE 3 of the drawings. As is also best illustrated in FIGURE 3 of the drawings, the finger openings 170, 190 in the respective panels 160, 180 permit the tabs 169, 189 to be readily disengaged incident to removing the cover 12 from the container body 11. This is accomplished by merely inserting ones finger through these openings and applying a downward force, as seen in FIGURE 3, until the tabs are disengaged or removed from their sandwiched relationship between the respective end panels 16, 20 and 18, 22.

The construction of the ventilating container 10, as was heretofore completely described, permits excellent ventilation of products packaged therein due to the position, structural arrangement and configuration of the various ventilating openings in the cover 12, the container body 11, and the reinforcing panels 120. For example, air or other fluid media is free to pass vertically upwardly or downwardly between a plurality of identically constructed containers, corresponding to the container 10, because of the alignment of the ventilating openings 138, 130 (FIGURE 2). Ventilation between adjacent identical containers is also achieved to afford a horizontal flow path due to the registration of the openings in the various side and end panels of the container body 11. In addition, the cover 12 projects beyond the container body on all sides thereof, as is best illustrated in FIGURE 3, and maintains adjacent containers in spaced relationship to afford free fluid flow about and around each of a plurality of such containers.

In addition to providing the excellent ventilation characteristics heretofore noted, the ventilating container 10 is extremely rigid due to the multi-ply construction of the end and side panels of both the container body 11 and the cover 12. In particular, the corners (unnumbered) of the cover 12 are extremely rigid due to the three-ply construction heretofore noted. In addition, the reinforcing panels sandwiched between the inner and outer side panels 19, 23 and 17, 21 of the container body 11 prevent the carton from bulging when subjected to high humidity and moisture conditions to which packaged fruit, such as peaches, are generally exposed. This is particularly true of containers which are shipped in refrigerated trucks or railroad cars.

The container 10 also overcomes numerous disadvantages of conventional fruit or vegetable containers which are generally veneer bushel-type baskets with tapered sides and curved top closures. Such baskets require more storage and shipping space than the generally rectangular container of this invention, and afford relatively little shock absorbing or cushioning characteristics to package fruit, which the container 10 provides by virtue of the spaced end and side panels thereof, particularly the end panels 18, 22 and 16, 20 (FIGURES 2 and 3). Since the reinforcing panels 120 are completely sandwiched between the side panels, there is no possibility of splinters puncturing the fruit or ones hand as the fruit is being removed from the container.

In addition, the generally rectangular configuration of the blanks 13 and 14 permit the same to be formed from a minimum amount of material and, thus, lessen the initial manufacturing cost of the container. The blanks 13 and 7 14 are also readily stacked and shipped in the flat planar form illustrated in FIGURES 4 and 7 and a packager need only have on hand conventional stapling mechanisms for assembling the container body 11, it being again noted that the cover 12 is devoid of any type of auxiliary securing means.

While preferred forms and arrangement of parts have been shown in illustrating the invention, it is to be clearly understood that various changes in details and arrangement of parts may be made without departing from the spirit and scope of the invention as defined in the appended claimed subject matter.

I claim:

1. A ventilated one-piece container comprising a container body and a pair of separate individual reinforcing panels, said container body being defined by a bottom wall, a pair of spaced side walls and a pair of spaced end walls, said side and end Walls being in adjacent relationship, each of said side and end walls being formed from a pair of inner and outer panels, one of said reinforcing panels being positioned between the inner and outer panels of each of said side walls, said reinforcing panels each being provided with at least one ventilation opening, and ventilation openings in each of said panels of the side walls in registration with each other and with the ventilation opening of an associated reinforcing panel whereby articles packaged in said container can be adequately ventilated while said reinforcing panels prevent side walls bulge.

2. The ventilated container as defined in claim 1 wherein said container body includes an openable cover having a top panel, a ventilation opening in said top panel and said bottom wall, and said top and bottom ventilation openings being in alignment whereby other identical containers in stacked relationship with said container provide free access for air or other fluid media through the stacked containers in a generally vertical direction from top to bottom or vice versa.

3. The ventilated container as defined in claim 1 wherein said container body includes an openable cover having a top panel, a ventilation opening in said top panel and said bottom wall, said top and bottom ventilation openings being in alignment whereby other identical containers in stacked relationship with said container provide free access for air or other fluid media through the stacked containers in a generally vertical direction from top to bottom or vice versa, said container including means for maintaining adjacent identical containers in spaced relationship thereby providing free access for air or other fiuid media through the adjacent containers in a generally horizontal direction from one side wall to the other and vice 'versa.

4. The ventilated container as defined in claim 3 wherein said ventilation openings of each of said reinforcing panels are elongated slots having longitudinal axes, the ventilation openings of each of said side panels are elongated slots having longitudinal axes, and the axes of said reinforcing panel slots and said side panel slots define an angle of less than 90 therebetween.

5. The ventilated container as defined in claim 4 wherein said cover additionally includes a pair of spaced side walls and a pair of spaced end walls, said side and end walls being in adjacent relationship, each of said side and end walls being formed from a pair of inner and outer panels, means maintaining said side and end walls in assembled relationship, said maintaining means being defined by at least one tab formed from one of said inner panels, a pair of slits in said top panel associated with each of said tabs, said slits setting oil therebetween a resilient strip portion of said top panel having a width generally corresponding to the thickness of said tabs, and each of said tabs being interlockingly received between said slits whereby said resilient strip portion is defiected upwardly but prevents said tab from projecting through the top panel. I

6. The ventilated container as defined in claim 1 wherein said ventilation openings of each of said reinforcing panels are elongated slots having longitudinal axes, the ventilation openings of each of said side panels are elongated slots having longitudinal axes, and the axes of said reinforcing panel slots and said side panel slots defining an angle of less than therebetween.

7. The ventilated container as defined in claim 6 wherein said container body is closed by a cover, said cover including a cover body defined by a top wall, a pair of spaced side walls and a pair of spaced end walls, said cover side and end walls being in adjacent relationship, each of said cover side and end walls being formed from a pair of inner and outer panels, and said cover end and side walls being in externally telescopic relationship to the respective end and side walls of said container body.

8. A cover comprising a cover body, said cover body being defined by a top wall, a pair of spaced side walls and a pair of spaced end walls, said side and end walls being in adjacent relationship, each of said side and end walls being formed from a pair of inner and outer panels, means maintaining said side and end walls in assembled relationship, said maintaining means being defined by at least one tab formed from one of said inner panels, a pair of slits in said top panel associated with each of said tabs, said slits setting off therebetween a resilient strip portion of said top panel having a width generally corresponding to the thickness of said tabs, and each tab being interlockingly received between associated pairs of said slits whereby each resilient strip portion is deflected upwardly to define a chamber receiving its associated tab with each tab being prevented from projecting through the top panel by its associated strip portion.

9. The cover as defined in claim 8 wherein each adjacent side and end wall defines a corner of said cover, at least one panel of each of said adjacent side and end walls including a terminal flap, the flap of said adjacent side wall being folded against said adjacent end wall to define a three-ply corner portion therewith, and the flap of said adjacent end wall being folded against said adjacent side wall to define a three-ply corner portion therewith.

References Cited UNITED STATES PATENTS 2,293,361 8/1942 Roberts 229-23 2,858,059 10/1958 Kitchell 229--37 X 2,914,235 11/1959 Jones 22934 2,965,279 12/1960 Campbell 22934 2,982,462 5/1961 Sharp et al. 22923 3,258,188 6/1966 Houston 22945 X FOREIGN PATENTS 671,757 5/1952 Great Britain.

DONALD F. NORTON, Primary Examiner.

DAVIS T. MOORHEAD, Examiner.

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