Nov. 17, 1964
`
`Filed June 26, 1962
`
`df.
`
`J. P. HAMILTON
`STACKING PAPERBOARD LUG BOX
`
`3,157,346
`
`3 Sheets-Sheet 1
`
`FIG _/ INVENTOR.
`
`‘Boyde, Motbes Tet
`
`_
`JOSEPH PORTOLA HAMILTON
`
`ATTORNEYS
`
`PGR2021-00085
`Pelican EX1069 Page 1
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`PGR2021-00085
`Pelican EX1069 Page 1
`
`

`

`Nov. 17, 1964
`
`Filed June 26, 1962
`
`J. P. HAMILTON
`STACKING PAPERBOARD LUG BOX
`
`3,157,346
`
`5 Sheets-Sheet 2
`
`
`
`FIG_ 3
`FIG _7
`
` oy
`
`PTLaredowho]
`
`Pea
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` pH 4
`1i
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`
`
`
`
`INVENTOR.
`
`JOSEPH PORTOLA HAMILTON
`
`ATTORNEYS
`
`PGR2021-00085
`Pelican EX1069 Page 2
`
`PGR2021-00085
`Pelican EX1069 Page 2
`
`

`

`Nov. 17, 1964
`
`J. P. HAMILTON
`STACKING PAPERBOARD LUG BOX
`
`3,157,346
`
`Filed June 26,
`
`1962
`
`3 Sheets-Sheet 3
`
`INVENTOR.
`YOSEPH PORTOLA HAMILTON
`BY
`Bagh, WrIehhe, thnk,
`ATTORNEYS
`
`PGR2021-00085
`Pelican EX1069 Page 3
`
`PGR2021-00085
`Pelican EX1069 Page 3
`
`

`

`3,157,346
`United States Patent Office
`Patented Nov. 17, 1964
`
`1
`
`3,157,346
`STACKING PAPERBOARD LUG BOX
`Joseph Portela Hamilton, Emeryville, Calif., assignor to
`American Box Corporation of California, San Frame
`cisco, Calif., a corporation of California
`Filed June 26, 1962, Ser. No. 205,446
`4 Claims.
`(Cl. 229.—23)
`
`This invention relates to a fiberboard lug box and the
`like, and has for one ofits objects the provision of a fiber-
`board box that is adapted to better resist collapse than
`heretofore, under compression, such as occurs in the
`lower boxes of a stack of loaded boxes.
`Another object of the invention is the provision of a
`fiberboard box that is adapted to be shipped flat, or ina
`collapsed position, and later set up for use, and which
`box is provided with reinforced end walls and means for
`holding superposed boxes against shifting laterally rela-
`tive to each other in any direction.
`An additional object of the invention is the provision
`of a foldable fiberboard box having a structure that pro-
`vides for better ventilation of the interior of superposed
`boxes than heretofore.
`Still further objects of the invention are the provision
`of; improved locking-means for locking the boxes in set-
`up position;
`improved end wall structure providing for
`greater strength than heretofore; a more economically
`made structure. in a lug box having the desired strength
`for withstanding collapse under the compression force of
`loaded boxes supported thereon when subjected to changes
`in normal atmospheric humidity.
`Other objects and advantages will appear in the de-
`scription and drawings.
`In the drawings, FIG. 1 is a plan view of a blank from
`which one portion of the box is to be formed.
`FIG. 2 is a fragmentary plan view of one end portion
`of a blank that is similar to that of FIG. 1 but modified
`along opposite end portions. The portion shown in FIG.
`2 correspondsin position to the lower portion of the blank
`of FIG. 1 and the upper end of the blank of FIG.2, if
`shown, would have the same siructure as seen in FIG. 2.
`FIG. 3 is a plan view of a second blank adapted to be
`used with the blank of FIG. 1 to overlie the latter central-
`ly thereof.
`FIG. 4 is a fragmentary plan view of one end por-
`tion of a blank that is similar to that of FIG. 3 but modi-
`fied for use with the modified blank of FIG. 2.
`FIG. 5 is an isometric view of the blanks of FIGS. 1
`and 3 secured together preparatory to forming the box,
`with several portions of the assembly. partially folded
`upwardly.
`FIG. 6 is an isometric view of the blanks of FIGS. 1
`and 3 substantially folded to form the box, but with cer-
`tain parts still extended so as to reveal interior structure.
`FIG. 7 is an enlarged cross sectional view taken along
`line 7—7 of FIG.6.
`FIG. 8 is an isometric view that.is similar to that of
`FIG. 6 but which view is of the modified form of the in-
`vention that is produced from the blanks of FIGS. 2 and
`4. The view is partly broken away to adapt it to the
`sheet.
`In detail, referring to the blank of FIG. 1, this blank
`forms only part of the box, but the parts formed there-
`from include all of two of the lateral side walls and por-
`tions of the two opposite end walls, and the lowermost
`layer of the bottom wall, the latter being in two layers.
`Said blank is generally rectangular in outline, being
`formed with a pair of parallel, spaced creases 1 that de-
`fine two of the opposite edges of the bottom panel 2 that
`will form the lowermost layer of the bottom of the box
`when the box is formed.
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`Equally spaced from the pair of creases 1, at the sides
`thereof outwardly of the bottom panel 2, are folding
`creases 3 that are parallel with the creases 1, each crease
`3 being relatively close to the crease 1 that is adjacent
`thereto. Thus a narrow panel 4 is disposed between each
`crease § and folding crease-3 that is adjacent thereto.
`These narrow panels 4 join the side walls of the box
`to the bottom panel 2, hence they extend longitudinally
`of the box, and parallel opposite free end edges 5 extend
`between the ends of the creases 3 at the corresponding
`ends of said creases 3,, which free end edges define the
`ends of the bottom panel 2.
`Outwardly of the pair of creases 3, and integral with
`the narrow panels 4 are corresponding side wall panels 6.
`Folding creases 7 form the junctures between the outer
`side wall panels 6, and top panels 8,
`the latter being
`alike, and in the finished box these will extend over the
`bottom wall 2 a distance equal to their respective widths.
`The panels 8 terminate in outer free edges 9 that may
`be parallel with creases 7, or scolloped or of any other
`desired contour, and these free edges define end edges of
`the central portion of the blank.
`Referring to the panels 6, it is seen that these panels
`are integrally connected at their ends with end sections
`generally designated £1 along folding creases 10.
`These end sections 14 are alike, and each comprises
`three panels 13, 14, 15 in a row, in which the panel 14
`at each end of each outer side wall panel 6 is the central
`panel in each row.
`There are four separate sections.11, as seen in FIG. 1.
`The panels 13 are like each other, and each of the panels
`15 are alike. These will later be described more in detail.
`In the blank of FIG. 1 the panels.13 are integral with
`the panels 14 along folding creases 16 that, in turn, are
`parallel. with the creases 1, 3 and each crease 16 is in
`outward projection of and in alignment with a substantial
`medial line’ through each narrow panel 4.
`The panels 15 are outwardly of the opposite ends: of
`each ofthe top panels 8, and are separated from said top
`panels 8 by cuts 17 that.are in alignment with the free end
`edges 5 of the bottom panel 2. At this point it may be
`noted that the folding creases 10 at. the ends of the side.
`wall panels 6 are slightly offset toward. each other rela-
`tive to the free end edges 5 and cuts. 17. The reason for
`this will appear later on.
`:
`A pair of parallel relatively closely spaced folding
`creases 18 that are parallel with the folding crease 16 in
`the same section define two of the edges of a narrowstrip
`19 that joins the adjacent panels 14, 15 of each section 11.
`These creases 18 are equally spaced at opposite sides of
`a line in extension of each crease 7 that is at the juncture
`between each side wall panel 6 and the top panel 8 ad-
`joining it.
`The outer free edges 20 that are along the panels 13-15
`of each set 9 are straight and uninterrupted. However,
`the adjacent panels 13 at.the ends of the bottom panel 2,
`and along free end edges 5 are spaced apart, and termi-
`nate in free edges 23 that are at. right angles to edges 20,
`and along each edge 23 a rectangular tab 24 projects into
`the space between the adjacent panels 13, which tabs are
`equally spaced from the edges § at each end of bottom
`wall 2, and each such tab is preferably closer to edge 5
`than to the outer edge 20 of the sections 13-15.
`.
`The crease 18 of each pair thereof that is closest to the
`central-panel 14 of each section 11 does not extend un-
`interruptedly between cut.17 and the outer free edge 20
`of each section, but is interrupted by cuts that form an
`elongated rectangular tab 25, which tab extends across
`the adjacent crease 18 and into the adjacent panel.15 to
`a point about midway between. the panel 15.and its free
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`edge 26 that is substantially in alignment with the free
`edge 9 of the blank.
`Each tab 25 extends at a right angle to the creases 18
`and each tab is at the same distance from the cut 17 that
`is adjacent thereto as each tab 24 is distant from the
`adjacent free end edge 5 of the bottom panel 2. Also the
`width of each tab 25 is substantially the same as the width
`of each tab 24 in the same dimension, or in the same di-
`rection as edge 23 or creases 18.
`Offset relative to each pair of folding creases 18 in a
`direction toward the outer free end of each tab 25,
`is a
`pair of parallel, closely spaced folding creases 27, which
`creases are parallel to creases 18 that are adjacent thereto.
`The distance between each pair of creases 18 is such
`that the panel 13 will lie flat between the panels 14, 15
`when each panel 13 is folded upwardly (as seen in FIG.
`1), over and against the central panel 14, and panel 15
`is then folded upwardly and over and against the panel 13.
`FIG. 5 shows two such sections, after folding, the section
`at the upper right hand corner being flat with the bottom
`panel 2,
`the latter being covered in FIG. 5 by another
`blank, as will be described later on.
`The distance between the edge 23 of each panel 13 and
`the crease 16 adjacent thereto,
`is substantially equal to
`the distance between creases 16, and the crease 18 nearest
`thereto, while the distance between crease 16 and the
`crease 17 in tab 25 that is nearest thereto is substantially
`equal to the distance between the outer free end edge of
`tab 24 and the crease 16, therefore, when the panel 13 is
`folded against panel 14, the outer free end of tab 24 will
`be at the above-mentioned crease 27, and upon folding
`pane! 15 over panel 13, the tab 25 will project beyond the
`narrow strip 19 between creases 18, yet the outer end por-
`tion of tab 25 beyond creases 47 may be folded over the
`projecting tab 24, as seen in FIG.5.
`Two. elongated slots 36 are formed along each crease 7.
`These are ventilation slots in the finished box, and one or
`more slots 31 are formed in each narrow panel 4 for the
`same purpose.
`On each end of each top panel 8 an outwardly projecting
`tab 32 is formed. These tabs 32 each have one tapered
`edge 33 to facilitate their entry into slots that are pro-
`vided in the blank of FIG. 3 that is part of the finished
`box when said blank is assembled with the blank of FIG.
`1 to form the box.
`This. will later be described. Each
`tab 32 extends into each top panel 8 a short distance, and
`the base edge of each tab is defined by a folding crease
`34. Each tab 32 extends into each panel 45, and therefore
`interrupts the cut 17 that is between the top panel 8
`and each panel 15.
`A small triangular portion of the blank is stamped out
`at the. end of each narrow panel 4, to form a triangular
`opening 35, having its base in extension of the free edge
`5 of the bottom panel, and the apex of each opening 35is
`on the line of each crease 16, and at the end of each
`such crease that
`is adjacent
`to each narrow panel 4.
`The reason for this opening is to enable the narrow panels
`4 to extend slantingly upwardly when the box is formed
`so that the ventilating openings 31 will not be blocked
`off when the boxes are in adjoiming stacks. This is a
`highly desirable feature in a box of this type.
`Along each of the free end edges 5 of the bottom
`wall or panel 2 is a pair of square, outwardly opening
`notches or recesses 36. These are equally spaced from
`the ends of creases 1, and will cooperate with certain struc-
`ture in the panel of FIG. 3 when thelatter is assembled
`with the panel of FIG. 1.
`Also, along the edge 26 of each panel 15 is a relatively
`shallow square notch or outwardly opening recess 37 that
`is adapted to cooperate with the notch 36 that is nearest
`thereto and with structure in the panel of FIG. 3 when the
`box is assembled. Adjacent to each notch 37, each panel
`15.is cut away to form a slanted edge 38 that is adapted
`to engage the upper surface of the narrow panel 4 when
`the box is set up with said narrow panel in an inclined
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`position, as has already been mentioned, and an opening
`39 is formed along each crease 16 adjacent to each open-
`ing 35, which opening extends into panels 13, 14.
`Referring to the blank of FIG.3, this blank is elongated
`so as to extend across and over the bottom panel 2 of
`the blank of FIG. 1, and has a central portion 40 that
`is of the same width as the bottom panel 2, hence when
`the central portion 40 is positioned on the bottom panel
`2 its free edges will be along and be parallel with the
`folding creases 1, to become the upper Jayer of the bottom
`of the carton, while panel 2 will be the lower layer.
`Parallel folding creases 43 extend transversely across
`the panel of FIG. 3 and are spaced apart a distance sub-
`stantially equal to the distance. between the free end edge
`5 of the bottom panel 2.
`Outwardly of the pair of folding creases 43 are corre-
`sponding -end portions each having a pair of relatively
`closely spaced folding creases 44 extending thereacross,
`which creases 44 are parallel with the crease 43 adjacent
`thereto. Each pair of creases 44 divides the end portion
`in which it is formed into a pair of substantially oblong
`panels 45, 46, with the panel 45 being the one adjoining
`crease 43.
`When the central panel 40 is secured on the bottom
`panel 2 of the blank of FIG. 1, the panels 45, 46 will be
`folded to opposed relation along creases 44 and each panel
`46. will become the inner layer of one of the end walls of
`the box, while the panel 45 will become the outer layer,
`and the narrow strip 47 between each pair of creases 44
`will be the upper edge of one of said end wails.
`The width of each panel 45 in the dimension of the
`width of the panel 49, which is transversely of the length
`of the latter, is. slightly greater than the width of panel
`40, and panel 45 is of the same width up to the folding
`crease 44.that is remote from the central panel 40.
`The width of each panel 46,
`in the dimension of the
`width .of the central panel 40.
`is slightly greater than the
`width of panel 45.
`The outer free end edges of the main blank of FIG. 3
`ate the free longitudinally extending cdges of the end
`panels 46, and are designated 48, and the outer corners
`of each panel 46 are cut off at 49 to have the same degree
`of inclination as the degree of inclination of the narrow
`panel 4 of the blank of FIG. 1 when the box is assembled.
`Also the corners of panel 45 at the.ends of creases 43 in
`the blank of FIG. 3 are cut off at 50 at a similar angle.
`A rectangular opening 53 is formed adjacent to cach
`end of each crease 43, which openings extend across the
`creases and partly into panels 45 at one side of each
`crease, and partly into the central panel 40, with the
`major portion of each opening being in the central panel.
`These openings are equally spaced from the ends of the
`creases 43,
`A pair of tabs 54 is formed in each of the narrow
`strips 47 between.each pair of creases 44, with the base
`end of each tab integral with each panel 45 along the
`line of the crease 44 that defines the juncture between
`each panel 44 and each such strip 47. However, the tabs
`are not creased along the above-mentioned line of one of
`the creases 44, hence the latter creases are interrupted by
`the tabs. The remainder of tabs 54 are free from the
`portions 47 and the outer free edges of said tabs are
`slightly short of the openings that are cut in the blank to
`form the. tabs, thereby leaving a slight slot 55 between
`the outer free edge of each tab and a line coincidental with
`the crease 44 that is remote from each panel 45.
`The outer free edges 48 of the blank of FIG. 3 are
`formed with relatively slight outwardly projecting tabs 56
`that are equally spaced from the ends of said edges 48.
`The spacing between the openings 53 and between tabs
`54 and tabs 56 is the same, and the pairs of said tabs
`and openings are aligned longitudinally of the blank of
`Fic. 3.
`In forming the lug box, the central panel 40 of the
`blank of FIG. 3 is glued against the upper surface of
`
`
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`5
`the bottom panel 2 of FIG. 1 (FIG..5) so. that the free
`side edges of the central panel 40 will be substantially
`in registration with the folding creases 1 of the blank of
`FIG. 1, and so that the creases 43 of the panel of FIG.
`3 will be substantially in registration with the free edges
`§.of the blank of FIG. 1.
`The panels 13 and 15 of each section 11 are then
`foided in succession, over the panel 14 with the result
`that the notches 37 will be in registration with the openings
`39 as seen in the upper right hand section 11 in FIG.5.
`The side panels or side walls 6 may then be swung
`upwardly {o positions substantially at right angles to the
`bottom panel 2 about creases 1, and then the previously
`foided panels 13-15 are swung about creases 10 to posi-
`tions over the central panel 10 and at right angles to the
`side walls 6.
`The narrower widthsof the side walls 6 between creases
`@ than the width of the bottom panel 2 between cuts
`17 will result in the assembled or prefolded panels 13-15
`drawing the narrow panels 4 to upwardly inclined posi-
`tions in which the slanted edges of openings 35 that are
`formed in panels 13, 14, and which are in registration
`when the panels 13 are folded onto panels 14, will engage
`the upper surfaces of said narrow panels 4 when the as-
`sembled sections 11 are swung to positions over the cen-
`tral panel 40.
`After the folded sections 11 are swung to positions over
`the central bottom panel 46, the planes of the outer free
`surfaces of the panels 14 of sections 11 will be substan-
`tially in registration with the folding creases 43, The
`right hand lower corner of FIG. 5 shows one of the sec-
`tions 141 in a position preparatory to being swung up-
`wardly and over the central bottom panel 40.
`Either before or after the sections 14 are swung to
`positions over the central bottom -panel 40 each of the
`tabs 25 on each panel 14 may be folded along creases
`27 over the tab 24 that is adjacent thereto, since the tabs
`24 will be in register with the portions of the tabs 25
`that extend across the pairs of creases 18 when the panels
`43, 15 of each section 11 are folded over the panel 14
`between them. The outer end of each tab 24 terminates
`at
`the crease lines 27 in the adjacent tab 25 to enable
`each tab 25 to fold over each tab 24.
`it is pertinent to note that when each section 11 is
`swung over the central panel 40 the openings 53 will be
`in registration with the notches 37 formed in the free
`edges of the panels 15, and with the equivalent notches
`formed by openings 39 along creases 16. Also, when
`this is done, the portions of openings 53 that extend into
`the panels 46 will form downwardly opening recesses
`(FIG. 5) adjacent to cach of the ends of the panels 46
`along their lower edges.
`The next step in forming the box is to swing the panels
`45 upward and against the outer surfaces of the sections
`14, which outer surfaces are at the outer sides of. the
`panels 14 of said sections. The panels 46 are then swung
`over the upper edges of sections 11 and downwardly to
`lie agaiust the inner surfaces of sections 11, which sur-
`faces are one of the surfaces of the panels 13.
`In per-
`forming the foregoing step,
`the tabs 25, with the tabs
`24 enclosed thereby, as indicated in FIG. 6, will enter
`and pass through the openings in which the tabs 54 are
`positioned, and the latter tabs will project upwardly along-
`side the tabs 25.. At the same time the tabs 56 will
`spring into openings 53 to hold the panels 46 against the
`sections 11, with said sections disposed between panels
`45, 46. When the tabs 36 are sprung into the openings
`53, they are quite firmly held so there is little, if any,
`chance for the panels 46 to be released accidentally.
`The free edges 48 of the panels 46 are snugly against
`the upper surface of the central pancl 42 and the narrow
`strips 47 that are between panels 45, 46 are snugly against
`the upper edges of the folded sections 11.
`The box in this form. will pravide a satisfactory box,
`independently of the top panels.$ that are carried by the
`
`6
`side walls 6, but these side walls contribute to greater
`rigidity by bending the tabs 32 to positions at right angles
`to the panels 8, and projecting toward each other when
`panels $ are vertical, so that said tabs will enter the
`openings that interrupt the narrow strip 47 where tabs
`51 are formed. When the top panels, which may be
`called “closure flaps” are folded downwardly they will
`extend over the upper open side of the box and tabs 32
`and panels 8 will hold the upper portions of the panels
`6 against any tendency to swing or bow outwardly rela-
`tive to the contents of the box.
`In stacking the boxes the upwardly extending projec-
`tions formed by tabs 24, 25, 54 will project into the
`openings 53 in the box thereabove, and the slanted panels
`4 along the lower corners of the upper box will permit
`free ventilation to the upper box through openings 31,
`and also the fact that these panels 4 are inclined will
`present their blocking ventilation through the openings
`30 in the lower box, or the box below the upper box.
`Of material importance is also the fact that there are
`five layers of fiberboard in each of the end walls of each
`box (FIG. 7), and which layers extend to the corners
`of the box, where corrugated, double faced fiberboard is
`used,
`the corrugations in the layers of the sections il
`and in the panels 45, 46 between which said sections are
`held, are vertical, hence present the maximum resistance
`to distortion or collapse against compression due to the
`loads in boxes superposed above others in a stack.
`Where loaded boxes of the type described are held for
`a moderate length of time in a warehouse, and the fiber-
`board is not treated to resist adsorption of moisture from
`the atmosphere, the lower boxes will not collapse.
`Where boxes are to be held for relatively long periods
`of time, the structure of FIGS. 2, 4 and 8 may be used.
`in this form of the invention, substantially the same
`blanks are employed as in FIGS. 1, 3, except that the
`sections 41 are cut off along parallel lines that are coin-
`cidental with the edges of tabs 24, 25 that face away
`from the bottom panel 2, hence the same numbers used
`in describing the structures of the blanks of FIGS. 1 and
`3 will apply to the blanks of FIGS. 2, 4 and to the box
`of FIG. 8, where the structures are identical.
`The portions of panels 13, 14 and 15 that remain in
`FIGS. 2 and 8 are numbered 213, 124 and 115 and after
`cutting off the panels 13, 14, 15 of FIG. 1, as above
`described, the openings 39 in the blank of FIG. 1 become
`recesses 138 in FIG.2.
`With respect to the blank of FIG. 4, this blank is iden-
`tical with the blank of FIG. 3 except that a. rectangular
`block of wood 100 is glned against the side of each panel
`46 in a position to lie between the sections 111, which
`consist of panels 113, 114, 145, when said sections are
`in folded relation as described with respect to the panels
`13-45 of FIG.1.
`When said panels 113-115 are folded on each other in
`the same manner as described with respect
`to panels
`43-15 of sections 11,
`it is apparent that the space be-
`tween sections 111 (FIG. 8) will be substantially greater
`than the space between sections 1 (FIG. 6) hence the
`biecks 109 in FIGS. 4, 8 mayberelatively long.
`The thickness of each block 108 may be approximately.
`the same as the thickness of the sections 111, but since
`the blocks 100 will take the load of upper boxes in a
`stack, the boxes of the structure of FIGS. 2, 4 and 8 will
`retain their stability against collapse for an indefinite
`period of time.
`The folding of the blanks of FIGS. 2, 4 to form the
`box of FIG. 8 is the same as the folding of the blanks
`of FIGS.
`i, 3 to form the box of FIG. 6, hence the
`steps will not be repeated.
`Fromthe description of the boxes of FIGS. 6 and 8,
`it is seen that the boxes in a stack will be held in perfect
`vertical, alignment to prevent upsetting of a stack due to
`inaccurate stacking. The projections formed by the tabs
`24, 25, 54 and openings 53 insure this result,
`In actual
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`practice the panels 13-15 and panels 113-115 are glued
`together, and when the tabs or projections 24 are en-
`closed by the tabs 25,
`they insure strong projections
`that will not be bent or torn, since each projection formed
`thereby consists of three layers of the fiberboard, to say
`nothing of the tabs 54 that are alongside tabs 25.
`Being of two-piece construction, the present box can
`be laid out to use a minimum of material for applied
`application to a specific commodity and, if desired, the
`two portions can be of different board weights, for ex-
`ample, the blank of FIG. 1 could be of heavier weight
`than the blank of FIG. 3, in order to obtain the benefit
`of the strong sections 11 that are on the blank of FIG.
`J. There are instances where a lighter weight blank of
`FIG. 3 may be used but such lighter weight would be
`inadequate to provide the strength required in the sec-
`tions 11 and side walls.
`The provision of separate blanks 1 and 3, or 2 and 4,
`provides a box in which the length of the corrugations
`in ihe side and end walls are vertical,
`thus providing
`maximum resistance to compression in both end andside
`walls, and also the fact that the corrugations in the bottom
`layers extend, unbroken, at right angles to each other,
`insures against bottom sag under a load.
`Furthermore, the employment of the separate blanks,
`as described, enables the manufacturer to imprint
`the
`blank of FIG. 1 as a stock item for all customers, to be
`held in stock, and the blanks of FIG. 3 could then be
`imprinted to customer orders. This would effect a sub-
`siantial economy.
`There are many other advantages to be derived from
`the two-piece construction, hence this structure is an im-
`portant feature of the present invention.
`I claim:
`1. A lug box comprising:
`(a) a pair of separate blanksof fiberboard, each having
`(b) substantially corresponding, horizontally disposed,
`rectangular ceniral portions,
`(c) said central portions being secured together with
`their edges substantially in registration to provide a
`pair of bottom panels, one being an upper panel and
`the other being a lower panel,
`(d) a pair of vertically disposed opposed end walls
`integral with one panel of said bottom panels;
`(e) a pair of vertically disposed opposed side walls
`integral with the other panel of said bottom panels;
`(f) said end walls being portions of one panel of said
`pair folded on themselves to provide an inner layer
`and an outer layer of fiberboard relative to the inside
`of said box with said inner layer and said outer
`layer at each end of the box integrally joined along
`a fold line defining the upper edge of each end wall;
`(g) means integrally connecting said side walls with
`said other panel of said bottom panels comprising
`relatively narrow panels extending slantingly up-
`wardly and outwardly relative to each other from
`said other panel of said bottom panels to said side
`walls,
`(fh) ventilating openings formed in said narrow panels,
`(i) means integral with said side walls at their lower
`ends positioned at right angles to said side walls and
`disposed between the inner and outer layers of said
`end wails against which said narrow panels are held
`in their said slanted positions, and
`(j) interlocking means at the upper edges of said end
`walls and integrally connected with said side walls
`for holding said side walls vertical and for holding
`said narrow panels in their said inclined positions,
`(k) said inner layer of each end wail and the means
`integral with said side walls against which said narrow
`panels are held being disposed over and substantially
`in engagement with the uppermost of said bottom
`panels for supporting the box against collapse from
`superimposed loads.
`
`10
`
`16
`
`20
`
`25
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`70
`
`75
`
`&
`
`fiberboard, each
`
`2, A lug box comprising:
`(a) a pair of separate blanks of
`having;
`(b) a substantially corresponding, horizontally dis-
`posed, rectangular central portion;
`(c) central portions being secured together with their
`edges substantially in registration to provide a pair
`of bottom panels, one being an upper panel and the
`other being a lower panel;
`(d) a pair of vertically disposed opposed end walls
`integral with one panel of said bottom panels;
`(e) a pair of vertically disposed opposed side walls
`integral with the other panel of said bottom panels;
`(f) said end walls being portions of one panel of said
`pair folded on themselves to provide an inner layer
`and an outer layer of fiberboard relalive to the inside
`of said box with said inner layer and said outer
`layer at each end of the box integrally joined along
`a fold line defining the upper edge of each end wail;
`(g) extensions integral with said side walls at
`the
`corners of said box disposed between said inner and
`outer layers of said end walls;
`(hk)
`interlocking means respectively on said extensions
`and on said end walls at the junctures between said
`inner and outer layers in interlocking relation for
`holding said side walls vertical and against move-
`ment from between said inner and outer layers;
`(i) closure flaps integral with said side walls along
`their upper edges extending toward cach other and
`over said bottom panels;
`(7) said interlocking means being upward projections
`on said extensions substantially coplanar therewith,
`and openings formed in each of said end walls along
`said fold line through which said projections extend;
`(%)
`tabs integral with said closure flaps extending at
`right angles thereto extending into said openings that
`are formed in each end wall along the upper edge
`of the latter for cccperating with said end walls to
`resist outward bowing of the latter under the force
`of contents of the box and to hold said extensions
`vertical;
`(1) said interlocking means being spaced along the
`upper edge of each end wall from said side walls.
`3. A lug box comprising:
`(a) a pair of separate blanks of fiberboard, each
`having;
`(b) a substantially corresponding, horizontally dis-
`posed, rectangular central portion;
`(c) said central portions being secured together with
`their edges substantially in registration to provide a
`pair of bottom panels, one being an upper panel and
`the other being a lower panel;
`(d) a pair of vertically disposed opposed end walls
`integral with one panel of said boitom panels;
`(e) a pair of vertically disposed opposed side walls
`integral with the other panel of said bottom panels;
`(J) said end walls being portions of one panel of said
`pair folded on themselves to provide an inner layer
`and an outer layer of fiberboard relative to the inside
`of said box with said inner layer and said outer layer
`at each end of the box integrally joined along a fold
`line defining the upper edge of each end wall;
`the
`(g) extensions integral with said side walls at
`cerners of said box disposed between said inner and
`outer layers of said end walls; and
`(A)
`interlocking means respectively on said extensions
`and on said end walls at the junctures between said
`inner and outer layers in interlocking relation for
`holding said side walls vertical and against movement
`from between said inner and outer layers;
`(i) closure flaps integral with said side walls along their
`upper edges extending toward each other and over
`said bottom panels;
`(/) said interlocking means being upward projections
`on said extensions substantially coplanar therewith,
`
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`and openings formed in each of said end walls along
`said fold line through which said projections extend;
`(k) tabs integral with said closure flaps extending at
`right angles thereto extending into said openings that
`are formed in each end wall along the upper edge
`of the latter for cooperating with said end walls to
`resist outward bowing of the latter under the force
`of the contents of the box. and to hold said extensions -
`vertical;
`.
`(1) said interlocking means being spaced along the
`upper edge of each end wall from said side walls;
`(m) said projections extending upwardly above said
`closure flaps;
`(n) openings formed in said bottom panels in vertical
`alignment below said projections adapted to receive
`the projections of the lower of a pair of vertically
`aligned superposed boxes of the s