MXPA97005878A - Cardboard box marked triangular transversal section - Google Patents

Abstract

A cardboard box or tubular package is of triangular cross section to contain, for example, a rolled paper product. The cardboard box is formed from a piece that bends to form an internal lining and then an outer wrap. Each end is closed by a triangular end piece (24) which is retained in its position by retention fins (25) which are inserted between the inner lining and the outer wrapper. The carton can have a short end portion arranged to articulate open along the fold line formed through the base side of the carton, to allow easy access to its contents.

Description

CARDBOARD BOX MARKED TRIANGULAR TRANSVERSAL SECTION Field of the Invention This invention relates to a carton or package that can be used for a wide variety of purposes. BACKGROUND OF INVENTION To date, many cardboard boxes have been used, which are square or rectangular in cross-section. Tubular containers of circular section have also been commonly used so far, particularly, for example to contain maps or rolled drawings. Such tubular containers of circular section suffer the disadvantage that it is often difficult to remove the rolled product from the container, either because access to the end of the product rolled through the end of the tube is difficult, or because the rolled product it is retained too tightly by friction against the inner surface of the tube. I have now implemented a cardboard box or packaging that is easier to use, to contain rolled products, than the conventional tubular container, but that can also be used, properly sized, to contain other products.

SUMMARY OF THE INVENTION In accordance with this invention, a carton or package of triangular cross-section is provided, said carton or package being formed from a piece of sheet material which is provided with a series of folds that divide the the piece in a plurality of panels, the piece being bent along said successive bending lines to form an internal lining and an outer envelope of triangular section around said internal lining. According to the above, the carton or packaging can be made from a piece of relatively thin sheet material, but achieving high strength. Preferably, at least one end of the part has a triangular end piece projecting therefrom to close the corresponding end of the carton or part. Preferably, the or each triangular end piece is retained in a closed position, through the corresponding end of the carton or package, by retaining wings hinged to the end piece and inserted between said inner lining and the outer wrapper of the box. cardboard or packaging. This provides a simple yet effective installation for closing the end of the carton while avoiding the use of adhesive or other means of retention. Preferably, the carton or package has an end portion that can be opened by bending around a fold line extending through a base side of the carton in an insertion position from the respective end of the carton. carton box. This carton can be used to contain a rolled product without excessive frictional adjustment between the product and the internal surfaces of the carton, because the two fit together only over three discrete contact lines. In addition, by providing an end portion of the open articulated carton, the end of the rolled product becomes easily accessible: often, the end of the rolled product will extend beyond the end of the main portion of the carton; in any case, there is a space at the corners of the cardboard box for the user to insert their fingers and hold the rolled product to remove it. Preferably, the two sides of the cardboard box are equal, so that their transverse shape is that of an isosceles triangle. The two sides and the base can all be equal to each other, so that the transverse shape of the cardboard box is that of an equilateral triangle. Alternatively, the two sides and the base can be sharpened such that one end of the carton or package is wider than the opposite end. Preferably, the inner lining projects beyond the end of the outer wrap at the end of the main portion of the carton. According to the above, the articulated end portion of the carton is frictionally adjusted over the projection end of the inner lining, when this end portion is closed, to maintain the latter in its closed position. Preferably, the end of the outer casing is inclined from the articulated line towards the apex opposite the articulated base, away from the end of the carton. Also, according to this invention, there is provided a carton or package of triangular cross-section comprising a base and two sides, the carton or package being formed from a piece which is provided with a series of dividing folds. the piece into a plurality of panels, the piece being bent along successive fold lines, and the cardboard box having an end portion that can be opened by bending around a fold line extending through said base in a insertion position from the end of the cardboard box. The carton or package can be formed from a piece of a single piece of sheet material, for example a cardboard. Or, the carton or package can be formed from a piece comprising two or more pieces of sheet material joined end to end. This provides a modular construction, in which the carton can be made to a selected or extended length, by joining one or more extension pieces between opposite end pieces. This overcomes the problems that arise when packing particularly long items. Thus, and more according to this invention, there is provided a cardboard box or package that is formed from a piece of sheet material, said piece comprising two or more pieces of sheet material joined together end to end . BRIEF DESCRIPTION OF THE DRAWINGS The embodiments of this invention will now be described, by way of examples only and with reference to the accompanying drawings, in which: Figure 1 is an isometric view of a first embodiment of the carton or packaging of according to this invention; Figure 2 is a side view, on an enlarged scale, of an end portion of the carton of Figure 1; Figure 3 is a plan view of an end of a one-piece piece from which the cardboard box of Figures 1 and 2 is formed; Figure 4 is a plan view of the opposite end of the piece from which the cardboard box of Figures 1 and 2 is formed; Figure 5 is a perspective view showing one end of the carton after the part of Figures 3 and 4 has been partially folded; Figure 6 is a similar view showing the same end of the carton after the piece has been completely folded but before its respective end piece has been closed through the end of the carton; Figure 7 is a plan view of a part of the piece, to form an end of a second embodiment of the carton; Figure 8 is a plan view of a second piece part, to form the opposite end of the second embodiment of the carton; and Figure 9 is a plan view of an extension piece to form an extension of the second embodiment of the carton.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES Referring to Figures 1 and 2 of the drawings, there is shown a tubular packing box b formed from a piece of cardboard or other one-piece sheet material, and is triangular in shape. cross section. The example shown is relatively long and small in cross section, suitable for receiving a rolled paper product such as a map or drawings, but in general the carton can be made in any required length or cross sectional length, to accommodate any product or products desired. In addition, the carton can be sharpened to one end for certain packing requirements. The two terminal ends of the carton are closed, but at one end the carton has a relatively short portion 5 that is arranged to articulate open, as shown in Figure 2, along a fold line that It extends through the base of the cardboard box, allowing easy access to the product (in this case, a map or rolled drawing 6) that is stored inside the cardboard box. It will be noted that the carton comprises an outer shell 20 and an inner lining 10, with the inner lining 10 projecting beyond the end of the main part of the outer shell 20: when the end portion 5 of the carton is articulated in the closed position, the internal surfaces of the two sides of the end portion frictionally adjust the two sides of the projection portion of the inner liner 10, to maintain the end portion 5 of the carton in the closed position. In order to assist this, two fins 7 are formed from the inner lining, and project towards the apex opposite the articulated base of the carton, to frictionally adjust the inner surfaces of the articulated end portion 5: or else, other elements may be pressed or bent out of the end portion 5 and / or the projection portion of the inner liner 10, to inteadjust when the end portion 5 of the carton is closed. The construction of the cardboard box will now be explained in more detail with reference to Figures 3 to 6 of the drawings. Figures 3 and 4 show a piece in one piece, cut from cardboard or other sheet material, from which the cardboard box is formed. The piece is divided, in the example shown, by parallel bending lines 9 into six rectangular panels 11, 12, 13, and 21, 22, 23. When constructing the cardboard box from the piece, the three are first folded first panels 11, 12, 13 to form the triangular internal lining 10, projections 14a being provided on the edge of the first panel to locate slots 14b along the fold line between the third and fourth panels: the configuration shown in figure 5 It is achieved like this. Then, the remaining three panels 21, 22, 23 are folded around the inner lining 10 to form the outer wrapper 20 of the carton, the configuration then being as shown in Figure 6. At each end of the piece, triangular locking flaps 15 are projected from the ends of the first two panels 11, 12 and are bent through the end of the inner lining 10 to close the last one as shown in figure 6. Also at each end of the piece, a triangular terminal part 24 projects from the end of the end panel 23: the retaining wings 25 project from the sides of each triangular end piece 24. Referring to Figure 6, once the outer shell 20 it has been folded around the inner lining 10 and the closing flaps 15 have been bent through the end of the inner lining 10, the triangular end piece 24 is bent over the pair of closure flaps 15 and, in doing lo, its retaining flaps 25 are inserted between the inner lining 10 and the outer wrapper 20, on the respective sides of the cardboard box. Short slits 16 are formed along the hinge lines of the closure flaps 15, so that the adjacent portion of each vane 15 forms a small projection that fits into a similar slit 26 formed along the line of articulation of the respective retaining flap 25 when the latter is inserted between the inner lining 10 and the outer wrapper 20 of the carton, thus securing the triangular end piece 24 in its closed position (shown in Figure 1). It will be noted that, at each end of the piece shown in Figures 3 and 4, the fold lines between the first two panels 11, 12 and their closing fins 15, and also the end edge of the third panel 13, are inserted slightly from the end edges of the fourth and fifth panels 21, 22. According to the above, the end of the inner lining 10, which is formed by the first three panels 11, 12, 13, is inserted slightly from the end of the outer wrapper 20, as defined by its two side panels 21 and 22: the fold line between the end panel 23 and the triangular end piece 24 is also inserted slightly from the end edge of the panels 21 and 22, so that when the end piece 24 is bent through the end of the carton, its outer surface is at the level of the end of the outer wrapper 20.

Referring to Figure 4, the doubles lines 33 and 36 are formed through the third and last panels 13 and 23, which correspond, respectively, to the base of the inner lining 10 and the base of the outer shell 20: the fold lines 33, 36 coincide when the piece is completely folded, to form the joint between the main length of the cardboard box and its opening end portion 5 (figures 1 and 2). The piece is cut along two lines 31, 34: the line 31 forms a division, on the two sides of the inner lining 10, between the main length of the cardboard box and its opening end portion 5; the other line 34 forms a division, on the two sides of the outer envelope 20, between the main length of the carton and its opening end portion 5. The line 31 has its opposite ends aligned with the double lines 33, 36 , but follows a trajectory that is closest to these fold lines towards the adjacent end of the piece, the symmetrical trajectory being around the fold between the first and second panels 11, 12. According to the above, and as shown in Figure 2, the end of the inner lining 10 curves away from the hinge line and is then bent back towards the vertex opposite the articulated base. The line 34 also has its opposite ends aligned with the fold lines 33, 36 but follows a path that lies beyond these fold lines from the end of the piece, the symmetrical path being around the fold between the fourth panels and fifth 21, 22 of the piece. According to the foregoing, and as shown in Figures 1 and 2, the end of the main length of the outer shell 20 of the carton follows a sloping line, from the articulation line to the vertex. opposite the articulated base, away from the adjacent end of the carton. While in the example shown this line follows a particular curved line, it can generally follow alternative profiles; For example, you can follow a straight line. Also in Figure 4, it will be noted that one of the projections 14a extends through the end of the cut line 31, and this cut line does not extend through the projection: according to the foregoing, this projection maintains together the main and extreme portions of the panel 11 as the panels 11, 12 and 13 are folded to form the internal lining 10. A line 35 is cut at the fold line 9 between the panels 11 and 12, to form the projections 7 which project from the apex of the inner lining 10, as shown in Figure 2, for frictional adjustment with the end portion 5 of the carton. Preferably, as shown in Figure 4, as a safety feature the cutting line 34 is interrupted for example at 34a, so that when the piece is bent to form the carton, the end portion 5 is retained at its closed position until, by a slight breaking motion to open the end portion 5, the outer wrapper breaks through these interruptions. As previously mentioned, there are occasions in which it is desirable to form a cardboard box of selected or extended length. Figures 7 to 9 show separate pieces to form a cardboard box of modular construction, at a selected length. In this way, figures 7 and 8 show pieces to form the two opposite ends of a cardboard box piece: in essence, the piece differs from the one-piece piece of figures 3 and 4 in that it comprises two or more pieces to be joined together end to end before folding the piece to form the cardboard box. However, if an extended-length cardboard box is required, then the parts of Figures 7 and 8 are joined at opposite ends of the extension piece shown in Figure 9: it will be appreciated that two or more of these extension pieces they can be joined end to end and then the respective end pieces of figures 8 and 9 are joined.

The end piece of Figure 7 has a joining edge 40 extending straight through the panels 21, 22, 23 and a joint edge 41 extending straight through the panels 11, 12 but beyond from the end edge of the piece that the joining edge 40: the joining edges 40, 41 are interconnected by an inclined binding edge 42 through the panel 13. The opposite end piece of Figure 8 has complementary joining edges 50, 51 , 52. The projections 54, 55 project from the joint edges 51, 52 of the end piece of Figure 8, and are installed to fit into complementary cuts 44, 45 formed at the joint edges 41, 42 of the end piece of figure 7. In this way, the opposite end pieces of figure 7 and 8 can be joined, to form the piece of cardboard box, by putting their respective joining edges 40, 41, 42 and 50, 51 , 52 in alignment and adjust the projections 54, 55 in the cuts 44, 45. The piece of The cardboard box can then be folded in the manner described with reference to Figures 5 and 6: it will be appreciated that the panels 21, 22, 23 of the end piece of Figure 7 will overlap the junction between the respective portions of the panels of the inner liner 10, 11, 12, and thus prevent misalignment of the projections 54, 55 of its cuts 44, 45. The outer edge of the end panel 23 is provided with projection projections 56 that are installed to pass through the slots 57 in the fold line between the panels 13, 21, to maintain flat the outer edge of the panel 23: the projections 56 are located in complementary shaped cuts 58 in the free edge of the panel 11, in order to be flat within the thickness of the wall of the inner lining. It will be noted that the extension part of figure 9 has, at one end, a joining edge 60, 61, 62 and cuts 64, 65, corresponding to the joining edge 40, 41, 42 and cuts 44, 45 of the piece terminal of figure 7: at its other end, the extension piece of figure 9 has a joining edge 70, 71, 72 and projections 74, 75 corresponding to the joint edge 50, 51, 52 and projections 54, 55 of the end piece of Figure 8. In this manner, the extension piece of Figure 9 can have the end piece of Figure 8 attached to its first end and the end piece of Figure 7 attached to its other end. Although this invention has been described in terms of a cardboard box or tubular packing of equal triangular cross section along the total length thereof, it will be appreciated that the carton can be sharpened in such a way that one end thereof is more wide than its opposite extreme. Alternatively, one end of the carton can be sharpened to a point. Preferably, the widest end is the end that is arranged to open.

Claims (18)

1. NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and therefore the property described in the following claims is claimed as property. A cardboard box or package of triangular cross section, said carton or package being formed from a piece of sheet material that is provided with a series of folds (9) that divide the piece into a plurality of panels ( 11 to 13, 21 to 23), the piece being bent along said successive fold lines so as to form an internal lining of triangular section from three of said panels (11 to 13) and an outer wrapper of triangular section is formed around said internal lining from three other said panels (21 to 23), with at least one end of the piece having a triangular end piece (24) projecting from one of the panels (23) of the external wrapping, said triangular terminal part (24) being retained in a closed portion, through the corresponding end of the carton or package, by retention vanes (25) that articulate to respective edges of said terminal piece ( 24) and frictionally inserted and adjusted between respective panels (11, 21 and 12, 22) of said inner lining and outer wrapping. A cardboard box or packaging according to claim 1, characterized in that in said end of the piece, said internal lining has closing flaps (15) hinged to respective panels (11, 12) thereof and bent through the corresponding end of the carton or package to close the latter, said triangular terminal part (24) closing on said closing flaps (15). 3. A cardboard box or packaging according to claims 1 or 2, characterized in that it has a base and two sides, and an end portion (5) which can be opened in relation to the main portion of the carton or package, by means of bending around a fold line (33) extending through said base in an insertion position from the respective end of the carton or package. A carton or package according to claim 3, characterized in that said internal lining projects beyond the end of the outer wrap at the end of said main portion of the carton or package. A cardboard box or packaging according to claim 4, characterized in that said end of said outer envelope is inclined from the fold line (33) toward the vertex opposite said base of the carton or package, away from the respective end of the carton or packaging. A cardboard box or package according to any of the preceding claims, characterized in that said fold lines (9) of said piece are parallel and said panels of said internal packing and outer wrap are rectangular. 7. A cardboard box or package according to any of claims 1 to 5, characterized in that said panels of said internal lining and external wrapping are sharpened towards one end of the piece. A cardboard box or packaging according to any of the preceding claims, characterized in that said piece is formed with projections (14a) on a free edge of a first said panel (11) of said internal lining, to be located in grooves (14b) along the fold line between the third panel of said internal lining and the first panel of said external wrapping. 9. A cardboard box or packaging according to any of the preceding claims, characterized in that said piece is formed with projections (56) on a free edge of a final panel of said outer shell, for insertion through slots (57) formed in a fold line between two other said panels. 10. A cardboard box or packaging according to any of the preceding claims, characterized in that said piece comprises a piece of sheet material. 11. A cardboard box or package according to any of claims 1 to 9, characterized in that said piece comprises two or more pieces of sheet material joined end to end along complementary end edges (40, 41 and 50, 51) in order to extend the length of the carton or packaging. A cardboard box or packaging according to claim 11, characterized in that the adjacent pieces of said piece are joined by projections (54, 55) projecting from a piece that fits in complementary cuts (44, 45) formed in the adjacent piece. 13. A cardboard box or package according to claim 12, characterized in that said projections and complementary cuts are formed in panels of the internal lining, and the joining edges (40, 50) of the panels of the outer wrapper are displaced from the panels. connecting edges (41, 51) of the inner lining so that the panels of the outer one-piece wrapping overlap the joint in the inner lining. A cardboard box or package according to any of the preceding claims, characterized in that the material of said piece comprises cardboard or plastic sheets. 15. A cardboard box or package of triangular cross section, said carton or packaging being formed from a piece of sheet material that is provided with a series of folds (9) that divide the piece into a plurality of panels (11 to 13, 21 to 23), the piece being bent along said successive folds in order to form an internal lining of triangular section from three of said panels (11 to 13) and an outer section wrapping triangular is formed around said inner garrison from three other such panels (21 to 23), having the carton or packaging a base and two sides and dividing the two sides of the inner lining and outer wrap to provide an end portion (5) that can be opened, relative to the main portion (20). ) of the carton or package, by bending around a fold line (33) extending through said base in an insertion position from the respective end of the carton or package, dividing the two sides of said internal lining along different lines of the lines along which the two sides of the outer shell are divided, so that said inner lining projects beyond the end of the outer shell of said portion of said lining. the carton or package and the outer wrapper of the other portion fit over the internal lining projection of said portion after closing said end portion. 16. A cardboard box or package is formed from a piece of sheet material that is provided with a series of folds (9) that divide the piece into a plurality of panels (11 to 13, 21 to 23), comprising the piece two or more pieces of sheet material joined together end to end to extend the length of the carton or piece formed therefrom, the piece being bent along said successive folds to form said carton or piece. A cardboard box or packaging according to claim 16, characterized in that the adjacent pieces of said piece are joined by projections (54, 55) projecting from a piece that is being adjusted in complementary cuts (44, 45) formed in the adjacent piece. A cardboard box or packaging according to claim 17, characterized in that said part forms an internal lining and an outer envelope wrapped around said internal lining, said complementary projections (54, 55) and cuts (44, 45) forming in the internal lining and outside the joining edges (40, 50) of the outer shell in such a way that the outer shell of said piece overlaps the joint (41, 42 and 51, 52) in the inner lining.