US 1924529 A
Description (OCR text may contain errors)
Patented A ug. 29, 1933 UNITED sures- VPATam'. ori-ica This invention relates to receptacles made of any suitable foldable material, usiially cardboard, paper vor the like, to the method of making, and to blanks capable-of being formed into,
g such receptacles. ,My invention is .particularly applicable to receptacles for holding powdered substances, such for example as sugar.
, Objects of my invention are to provide a rev ceptacle adapted for folding, nlling and sealing 1Q by automatic machines, which may be rapidly and easily folded from a'ilat blank, which has parts adapted tocooperate with closing and/or f sealing ,instrumentalities to permit/ rapid and easy closing and/or sealing, which has parts which after closure cooperate to form joints having a minimum of length exposed to sifting of the contents, and wherein sifting or leakage of contents of the receptacle through the joints is prevented.
Additional objects of invention and features of advantage'and novelty will be rapparent from the following explanation of specific instances ofl the invention 'shown in the accompanying drawings byway of example only.
In the accompanying drawings:
Fig. 1 is a plan of a blank suitably. creased for forming into a carton; k
Fig. 2 is a side elevation of a form of an openended carton formed,`from the blank of Fig. 1;
Fig. 3 is a perspective view of the receptaclev of Fig. 2, showing. the manner of closing an end.
1 of the receptacle; v
Fig'. iis a side elevation of a receptacle showing the end more nearly closed thanin 3;
Fig.v 5 is a-side elevation oi? the upper portion of a receptacle and illustrates the manner in which the receptacle is finally closed and/or sealed; f
Fig.`6 is a section on the linee-6 of Fig. 5; Fig. 'I is a section on the line '1 7 Iof Fig. 6; Fig.8 is a section on the line 8-8 of Fig. 5; F18. 9 is .'Iie blank showninll'lgicomprises'a sheet er entstammen. auch u cardboard. cut ma.
a plan of a collapsed boxI made frornI the form shown and provided with score or fold lines Aof increased flexibility 13, 14,'15 and l16 extending in one dimension and similar lines xli'l and 18 extending in a transverse dimension to provide non-adjacent side wail sections A and C and non-adjacent intermediate wall sections B and D.' The portion of the blank lying be` tween fold line 17 and the adjacent edge of the blankv is adapted to serve as vone end closure of the receptacle formed from the blank while anes :in any other desired fashion, for instance as shown in the embodiment of Figs. 10 to l2.
Referring to Fig. 2, in which the ,wall sections A, B, C and D have been angularly related, 8o
to forman open carton (the bottom 'being lshown as closed), the illustrated end closure isy 5 adapted to extend in approximate prolongation of the side wall sections to form an upstanding extension of the receptacle. This extension V may retains. portion'ofthe contentsjobthe re ceptacle during nlling and while the contents are being compacted, as by shaking, to within the final volume of the receptacle.
In the embodiment of the invention' 'shownin `90 Figs. 1 to 9., the end closure includes primary end closure sections G and H, comprising `ex tensions of side wall vsections A and C. and
secondary end closure sections E and F comprising extensions of intermediate wall.` sections A and C. The blank of Fig. 1 is'pr'ovided with a/connecting flap P extending along one Iside thereof and suitable to eonnect,\vfor instance by means of glue. side wall A withintermediate wall'I D, andf'primary end closure section G with secondary end closure section F to form a collapsed tube such as shown in Fig. I 9. This collapsed tube, which is in convenient -form for storage or shipping, may be expanded into an open-ended carton, whereupon either or both ends may be closed by the end-closure tions provided. Fig. 2 shows such a-carton ving its top end-closure sections open. In theI blank and receptacle primary end closure no sectionsGandHareeachofsuchlieil edge) that when folded into end-closing position, free edge portions of opposite members cooperate to form an inner closure. Diagonal :fold lines of increased flexibility 19 and 20 are provided on each primary end closure section G and H in order to permit members E and F, which connect these members, to be folded into end-closing positions, these diagonal fold lines dividing each of members G and H into side portions 33 and 34 which lie respectively outside of these diagonal lines and a central portion 32 which lies between these lines. The sum of the heights of the central portions 32 is preferably substantially ,equal to the width of an intermediate Wall section. When the various members comprising the end closure are folded y into end-closing position, sections G and H are close enough to the opposite inner thickness so.l
that no more than a restrictedv passage (and preferably none at all) is left between these opposite inner thicknesses, and preferably the free edges 42 of these inner thicknesses cooperate to A form a butt joint, as shown.
Portions 33 and 34, which are adapted in the closed postion to form an overlying thickness, have free `edges 40 and 41 respectively which, in the closed position, preferably overlie the free A edge 4 2 of the corresponding inner thickness and form a joint with the respectively corresponding portions of the other diagonally folded .primary end closure section. A preferred construction is shown in Fig.` 8, wherein oppositely disposed free edges 440 of the outer thicknesses of the two diagonally folded primary end closure sections abut directly over the joint formed by free edges 42.
Portions 33 of the primary'end closure sections have free edges 46, which in end-closing position lie in a common plane, transversely of the above described joints, and are adapted to form a joint, preferably a butt ljoint, withanother portion of the receptacle. By thus providing inner and secondary overlying thicknesses provided with angularly related superposed joints, the sifting 'of the contents is minimized. In the illustrated embodiments of the invention outer portions 33 each have a length (measured from the fold line 17 to the free edge 46) of approximately one-half the width of the side walls A and C, so that the sum of the heights of these outer portions is substantially equal to the width. of a side wall. `Free edges 46 of portions 33, lying in a common plane, preferably form a butt joint with oppositely disposed free. edges 47 of the similar portions 34, as shown in Fig. 7. To
render possible this preferred construction posed betwgen and serving to connect the primary end closure sections G and H, form, in
y(measuring from line 17 to the opposite free end-closing position, an outer covering member overlying both thicknesses of sections G and H and serve to retain them in substantially parallel abutting relation. By providing a secondary end closure section of greater length than the adjacent`primary end closure sections, for instance by having section E extend farther from fold line 17 than the free edges 46 of the adjacent sections, the` joints formed between the free edges 41 of the opposite primary end closure sections, and the joints formed by free edges 46 with adjacent parts of thestructure, may be effectively closedv by an overlying thickness. Preferably, as shown, the secondary end closure sections E and F are each of greater length than half the width of the side walls A and C.
By tucking the outer extremity of member F under the outer extremity of member E, as shown in Figs. 4 and 5, the edges 46 and 47 may be brought into tightly abutting relation, and by suitably sealing members E and F together where they overlap, edges 46. and 47 may be retained in close contact. In sealing members E and` F,
a tension may be applied to them suiiiciently to hold them fiat against the folded primary end closure sections G and H, thus preventing the sifting of the contents therebetween.
The top of the receptacle thus comprises a cambered bellows, having throughout itsv major area at least three thicknesses composed of an inner thickness `formed by the intermediate portions 32 of primary end closure sections G` and H. a second thickness formed by the outer portions 33 and 34 of primary end closure sections G and H, and an outer overlying thickness formed by the second end closure sections E and F, and serving to seal the receptacle. Due to this cambered bellows folding the effective lengths of the joints exposed to sifting is materially decreased y over former constructions, whileA the advantages of the closure requiring sealing at only one place, and the closure member serving as a continuous upstanding extension of the receptacle during lling are obtained. Furthermore the-pro- 4vision of the primary end closure sections directclosed by machinery. Referring to Fig. 3, a compressive force applied to the receptacle along the line of the arrows and taking eifect upon portions 32, serves to collapse the' bellows top and bring the three thicknesses of the closure portion into almost parallel planes, as shown in Fig. 4. From this position the closing may be completed by a downward force applied to' the top layer, as indicated by vthe arrow y in Figs. 4 and 5. By applying the compressive forcevindicated 'by arrows n: to portions 33 at one side of their center, nearer to the tuck-in flap of member F, this flap will swing faster than member E, with the result that member E v will overlie member F. By first applying glue to either E orF, near their extremities, and then closing the receptacle in the above-described manner, the downward pressure exerted, as shown in Figs. 4 and 5 will serveY to seal the closure.
To enable the end-closing elements of the receptable to be closed in the above-described Lacuna manner, and particularly by automatic mmhin ery, it is highly desirable that both/of the secondary end closure elements E and F be sub-- stantially higher than any parts of the primary end closure elements G and H, as shown in the drawings, so as to permit elements E and F to be overlapped without any interference by these primary end closure elements G and H. It
is furthermore desirable that at least one of the,
two elements E and F (especially element F) be of materially less height than the width of the'v walls A and C which'carry the diagonally foldable members G and H. By employing an element F thus proportioned' this element may be tucked under the cooperating element E as described above and as shown in Fig. 4 without bending any substantial length of either element F or element E and without interference between them when they. meet in closing th receptacle. I
The embodiment of the invention shownv in Figs. l0 to 12 is very similar to the embodiment of the invention shown in Figs. 1 to 9, and after assembling into an open-ended cartonthe end closure sections function correspondingly. In the description of this embodiment, corresponding reference characters are used to designate the various receptacle-forming elements.
The embodiment of the invention illustrated in Figs. 10 to 12 differs from that illustrated in Figs. 1 to 9 chiefly in that the bottom K of the receptacle is formed of a single section extending in prolongation of two side wall sections A andC of the box, and that two nonadjacent walls of double thickness are formed by overlapping intermediate wall sections B and B" and D' and D respectively. To side wall vsections A' and C are attached diagonally foldingv primary end closure sections G and H respec-f' end of the blank oppositely disposed connecting y sections L and M of less length than the secondary end closure sections and preferably of the same length as the diagonally folding primary end closure section H are provided.
.The blank of Fig. 16 may be folded into the gopen ended carton of Fig. ,12, for example, by
amxing the glue'laps P and Q to adjacent walls in the order diagrammatically shown in Fig. 11,
and gluing members B" and L to members B' and E respectively, and members D and M to members D' 'and F respectively. The openended carton of Fig. 12l may then be closedl and/or sealed in the same manner as the openended carton `of Fig. s,` the diagonally folded members G and H functioning in the same manner to provide a tight Joint. The receptacle thus formed may then be closed in a manner similar to the previously described embodiment.
I claim: 1. A receptacle-forming blank consisting of an :integral sheet of material marked by lines of increasedl flexibility into four main wall sections,
two of said wall sections being wider than the other two, so as to form a receptacle of oblong Vcross-section, and pairs of end-closing elements comprising extensions of the pairs of wider and narrower wall sections respectively, the wider end-closing sections which comprise extensions of the wider main wall sectionsl each having two diagonal fold lines of increased flexibility extending from the two corners which'are adbetween the two diagonal fold lines ofthe secm5 A tion. I
-2. A receptacle having an en'd closure which includes extensions Vof two opposite walls of the receptacle folded across the end of the receptacle yand each folded on two diagonal fold lines, a
free edge portion of each of said diagonally folded extensions .forming a butt .jointl with another free edge portion of the same diagonally folded extension, other free edge portions of substantiallength of thetw'o diagonally folded o extensions lying closely adjacent along the middle of the end of the receptacle.
3. A receptacle having an end closure which includes extensions of two opposite walls of the ,receptacle folded across the end ofthe receptacle and each folded on. two diagonal fold lines,
a free edge portion of each of said diagonally folded extensionsfor'ming a butt joint with another free edge portion of the same diagonally folded extension, other free edge portions of substancia length or .the two` diagonauy raided extensions lying across the end of the receptacle in parallel relation.