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US20040164132A1 - Articles of unitary moulded-plastics sheet construction - Google Patents

Articles of unitary moulded-plastics sheet construction Download PDF

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Publication number
US20040164132A1
US20040164132A1 US10/475,405 US47540503A US2004164132A1 US 20040164132 A1 US20040164132 A1 US 20040164132A1 US 47540503 A US47540503 A US 47540503A US 2004164132 A1 US2004164132 A1 US 2004164132A1
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Prior art keywords
walls
base
hinges
article according
sheet
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Abandoned
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US10/475,405
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Stephen Kuester
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
    • B65D1/225—Collapsible boxes

Definitions

  • This invention relates to unitary-sheet articles.
  • an article of unitary moulded-plastics sheet construction which is convertible between a three-dimensional erect state and a substantially-flat, folded state, the sheet incorporating a multiplicity of flexible membrane portions located between and integral with spaced parts of the sheet to define hinges for enabling those parts to be deflected angularly with respect to one another in conversion between the two states.
  • the article of the invention when in the erect state may take the form of a container, for example a box (with or without a unitary lid) or a cup, carton or other vessel.
  • the invention is in this respect of particular advantage in that the unitary, seamless nature of the container makes it very suitable on the one hand for containing liquids and other product, and on the other hand for keeping contained product (such as foodstuff or pharmaceutical product) sealed and free from contamination.
  • the erect article may take any other form, fob example, that of an article of furniture, or of packaging.
  • Each membrane portion of the article according to the invention may be defined by a channel in one of the two faces of the sheet leaving a thin web or membrane contiguous with the two parts of the sheet located either side of the channel, for hinging those two parts to one another.
  • the flanks of the channel may be inclined away from one another outwardly of the channel, with the angle between them determining to a substantial extent the range of angular deflection required or possible of the hinge.
  • the angle between the flanks is substantially a right angle when the two parts located either side of the channel are coplanar
  • the angular range of hinging will in general be of the order of 270 degrees, some 90 degrees in the sense closing the channel from the coplanar condition and virtually 180 degrees in the opposite, opening-up sense
  • the folding of contiguous parts of the sheet flat onto one another is facilitated where the folding movement at the relevant membrane-channel hinge is in the opening-up sense; it may also be obtained, however, for the closing sense by extending the width of the membrane in the channel so as to form, in effect, a double hinge.
  • the article in the erect state may form a container having at least four walls, and in which each of the walls is individually hinged to three said walls by respective membrane hinges.
  • a container with just four walls each hinged to three others, is of triangular form with an open top.
  • Five walls are required for a rectangular, open-top structure, a rectangular base and two pairs of opposite side-walls.
  • the side-walls are hinged by respective membrane hinges to the base, and each of a first pair of the side-walls is similarly hinged to the two side-walls respectively of the second pairs.
  • Each side-wall of the second pair may then incorporate a further respective membrane hinge to enable that side-wall to fold onto itself between the side-walls of the first pair in the folded state.
  • the base may incorporate an elongate flexible-membrane portion that extends substantially parallel to the side-walls of the first pair, together with six membrane hinges extending from said elongate membrane portion, four to the four corners respectively of the base and two substantially-aligned with the flexible membrane portion in opposite directions from it.
  • FIG. 1 is a perspective view from below of the foldable box according to the present invention, in its three-dimensional erect state;
  • FIG. 2 is a plan view of the box of FIG. 1 in one of two possible folded, flat states
  • FIG. 3 is illustrative of a membrane hinge typical of a multiplicity of such hinges of the box of FIG. 1 that enable it to be readily converted between its erect and folded states of FIGS. 1 and 2 respectively;
  • FIG. 4 is a plan view from below of the box of FIG. 1;
  • FIGS. 5 to 8 are sectional elevations to reduced scale of the box of FIG. 1 taken on the lines V-V, VI-VI, VII-VII and VIII-VIII respectively of FIG. 4;
  • FIGS. 9 to 11 are views to enlarged scale showing details of regions of the box of FIG. 1, identified as IX, X and XI respectively in FIG. 8;
  • FIG. 12 is a perspective view of the box of FIG. 1 modified to include a lid, shown in its three-dimensional erect state.
  • the first box to be described which is open-topped, has five substantially-flat walls, namely a pair of opposite side-walls 1 , a pair of opposite side-walls 2 and a base 3 .
  • Each wall 1 is hinged to each wall 2 , and all four walls 1 and 2 are individually hinged to the base 3 , with the whole of the box, including the hinging, formed by a unitary, injection-moulded sheet of plastics (for example polypropylene).
  • the box is foldable from the erect state in which the walls 1 and 2 are upstanding from the base 3 , to a substantially-flat state illustrated in FIG. 2. In this latter state the base 3 and walls 2 are folded to bring the walls 1 flat onto one another with two halves of the walls 2 folded back to back between them.
  • the folding of the box is enabled by the hinging of the walls 1 and 2 to the base 3 , and also by hinging within the walls 2 and the base 3 .
  • the hinges involved are each, as illustrated in FIG. 3, defined on one face 10 (specific either to the inside or outside of the box) of the plastics sheet 11 by a channel 12 moulded in that face 10 .
  • a thin web or membrane 13 (for example, of 0.3 mm thickness) of the sheet 11 remains intermediate the inclined flanks 14 of the channel 12 to establish a flexible joint integrally with the two parts 15 of the sheet 11 on either side of the channel 12 .
  • the flanks 14 are inclined away from one another outwardly of the channel 12 substantially at a right angle to one another.
  • the two parts 15 can accordingly be folded inwardly towards one another closing up the channel 12 as indicated by the arrows A until the flanks 14 come into abutment with one another to limit the extent of turning to some 90 degrees, on the other hand, they can be folded in the opposite, opening-up sense indicated by the arrows B, through some 180 degrees to bring the parts 15 back to back.
  • the side-walls 1 and 2 are integral with one another through membrane hinges 21 , and each is integral with the base 3 through membrane hinges 22 and 23 respectively.
  • the profiling of the hinges 21 to 23 is on the outside of the box in the sense that the channels forming them are on the outside (reference to the profile or profiling of a hinge being on the ‘inside’ or ‘outside’ refers to whether the channel corresponding to channel 12 of FIG. 3, is located inside or outside, respectively).
  • Each wall 2 also has a membrane hinge 24 which divides the wall 2 into two half-lengths 2 a and 2 b , the hinge-profile in this case, in contrast to the profiling of the hinges 21 to 23 , being on the inside of the box.
  • a break 25 is provided in the outside-profiled hinge 23 halfway along each wall 2 . This enables the two half-lengths 2 a and 2 b of the wall 2 to fold inwardly about the hinge 24 , flat onto one another back to back (outside face to outside face) between the two sides 1 in the folded state of the box (FIG. 2).
  • the base 3 has four membrane hinges 26 profiled on the outside that extend diagonally from the corners of the base 3 to a central, rectangular recess 27 .
  • the recess 27 which defines an elongate, double-width membrane-hinge profiled on the outside of the box, extends substantially parallel to the sides 1 .
  • Two membrane hinges 28 profiled inside the box extend substantially in alignment with the recess 27 to the hinges 24 respectively, so that two triangular parts 3 a of the base 3 defined between each hinge 28 and its adjacent hinges 26 , can fold inwardly onto one another back to back (outside face to outside face), The two parts 3 a fold about their hinges 26 as the half-lengths 2 a and 2 b of the adjacent-wall 2 fold inwardly also.
  • the remaining parts 3 b of the base 3 each having the configuration of a regular trapezium (that is to say, a quadrilateral with opposite, unequal sides parallel and the other two sides equal), fold towards one another (inside face towards inside face) about the two membrane hinges 29 effectively defined along the longitudinal margins of the recess 27 .
  • the hinge-configuration of the base 3 allows it to fold in another mode from that described above and illustrated in FIG. 2.
  • folding of the base 3 may be inverted such that, rather than folding outwardly with the parts 3 b outside the sides 1 , it folds in a mode in which the hinges 26 , 28 and 29 turn in the reverse senses to locate the parts 3 b between the sides 1 .
  • the box is manufactured by injection moulding in the three-dimensional state.
  • the injection gates are strategically located to ensure that the fronts of the injected material are hot when they meet so that there is good fusion between them.
  • the box described above is open-topped but it may be modified to include a lid for closure, as illustrated in FIG. 12.
  • the lid 31 is simply formed integrally with one of the sides 32 of the box, through a membrane hinge 33 , and has a hinged-down rim 34 .

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Abstract

A foldable-box container is formed by injection moulding to have its side-walls (1,2) joined to one another and to its base (3) by integrally-formed membrane hinges (21-23). Membranes (24) divide the sides (2) to enable hinging of halves (2 a ,2 b) of the side (2) onto one another back to back between the sides (1). The base (3) folds outwardly on diagonal membranes (26, 29) and inwardly on membranes (28) bringing parts (3 a) back to back between parts (3 b); the folding of the base (3) may be inverted to fold it inside the sides (1). A hinged lid (31) with hinged-down rim (34) may be formed integrally with the box.

Description

  • This invention relates to unitary-sheet articles. [0001]
  • According to the present invention there is provided an article of unitary moulded-plastics sheet construction which is convertible between a three-dimensional erect state and a substantially-flat, folded state, the sheet incorporating a multiplicity of flexible membrane portions located between and integral with spaced parts of the sheet to define hinges for enabling those parts to be deflected angularly with respect to one another in conversion between the two states. [0002]
  • The article of the invention when in the erect state may take the form of a container, for example a box (with or without a unitary lid) or a cup, carton or other vessel. The invention is in this respect of particular advantage in that the unitary, seamless nature of the container makes it very suitable on the one hand for containing liquids and other product, and on the other hand for keeping contained product (such as foodstuff or pharmaceutical product) sealed and free from contamination. However, the erect article may take any other form, fob example, that of an article of furniture, or of packaging. [0003]
  • Each membrane portion of the article according to the invention may be defined by a channel in one of the two faces of the sheet leaving a thin web or membrane contiguous with the two parts of the sheet located either side of the channel, for hinging those two parts to one another. The flanks of the channel may be inclined away from one another outwardly of the channel, with the angle between them determining to a substantial extent the range of angular deflection required or possible of the hinge. If, for example, the angle between the flanks is substantially a right angle when the two parts located either side of the channel are coplanar, the angular range of hinging will in general be of the order of 270 degrees, some 90 degrees in the sense closing the channel from the coplanar condition and virtually 180 degrees in the opposite, opening-up sense, The folding of contiguous parts of the sheet flat onto one another is facilitated where the folding movement at the relevant membrane-channel hinge is in the opening-up sense; it may also be obtained, however, for the closing sense by extending the width of the membrane in the channel so as to form, in effect, a double hinge. [0004]
  • The article in the erect state may form a container having at least four walls, and in which each of the walls is individually hinged to three said walls by respective membrane hinges. A container with just four walls each hinged to three others, is of triangular form with an open top. Five walls are required for a rectangular, open-top structure, a rectangular base and two pairs of opposite side-walls. In this case, the side-walls are hinged by respective membrane hinges to the base, and each of a first pair of the side-walls is similarly hinged to the two side-walls respectively of the second pairs. Each side-wall of the second pair may then incorporate a further respective membrane hinge to enable that side-wall to fold onto itself between the side-walls of the first pair in the folded state. Furthermore, the base may incorporate an elongate flexible-membrane portion that extends substantially parallel to the side-walls of the first pair, together with six membrane hinges extending from said elongate membrane portion, four to the four corners respectively of the base and two substantially-aligned with the flexible membrane portion in opposite directions from it. [0005]
  • A foldable box in accordance with the present invention will now be described, by way of example, with reference to the accompanying drawings, in which: [0006]
  • FIG. 1 is a perspective view from below of the foldable box according to the present invention, in its three-dimensional erect state; [0007]
  • FIG. 2 is a plan view of the box of FIG. 1 in one of two possible folded, flat states; [0008]
  • FIG. 3 is illustrative of a membrane hinge typical of a multiplicity of such hinges of the box of FIG. 1 that enable it to be readily converted between its erect and folded states of FIGS. 1 and 2 respectively; [0009]
  • FIG. 4 is a plan view from below of the box of FIG. 1; [0010]
  • FIGS. [0011] 5 to 8 are sectional elevations to reduced scale of the box of FIG. 1 taken on the lines V-V, VI-VI, VII-VII and VIII-VIII respectively of FIG. 4;
  • FIGS. [0012] 9 to 11 are views to enlarged scale showing details of regions of the box of FIG. 1, identified as IX, X and XI respectively in FIG. 8; and
  • FIG. 12 is a perspective view of the box of FIG. 1 modified to include a lid, shown in its three-dimensional erect state.[0013]
  • Referring to FIG. 1, the first box to be described, which is open-topped, has five substantially-flat walls, namely a pair of opposite side-[0014] walls 1, a pair of opposite side-walls 2 and a base 3. Each wall 1 is hinged to each wall 2, and all four walls 1 and 2 are individually hinged to the base 3, with the whole of the box, including the hinging, formed by a unitary, injection-moulded sheet of plastics (for example polypropylene). The box is foldable from the erect state in which the walls 1 and 2 are upstanding from the base 3, to a substantially-flat state illustrated in FIG. 2. In this latter state the base 3 and walls 2 are folded to bring the walls 1 flat onto one another with two halves of the walls 2 folded back to back between them.
  • The folding of the box is enabled by the hinging of the [0015] walls 1 and 2 to the base 3, and also by hinging within the walls 2 and the base 3. The hinges involved are each, as illustrated in FIG. 3, defined on one face 10 (specific either to the inside or outside of the box) of the plastics sheet 11 by a channel 12 moulded in that face 10. A thin web or membrane 13 (for example, of 0.3 mm thickness) of the sheet 11 remains intermediate the inclined flanks 14 of the channel 12 to establish a flexible joint integrally with the two parts 15 of the sheet 11 on either side of the channel 12. When the hinge is fully open, that is to say when the parts 15 are coplanar as illustrated in FIG. 3, the flanks 14 are inclined away from one another outwardly of the channel 12 substantially at a right angle to one another. The two parts 15 can accordingly be folded inwardly towards one another closing up the channel 12 as indicated by the arrows A until the flanks 14 come into abutment with one another to limit the extent of turning to some 90 degrees, on the other hand, they can be folded in the opposite, opening-up sense indicated by the arrows B, through some 180 degrees to bring the parts 15 back to back.
  • Referring again to FIGS. 1 and 2 and also to FIGS. [0016] 4 to 8, the side- walls 1 and 2 are integral with one another through membrane hinges 21, and each is integral with the base 3 through membrane hinges 22 and 23 respectively. The profiling of the hinges 21 to 23 is on the outside of the box in the sense that the channels forming them are on the outside (reference to the profile or profiling of a hinge being on the ‘inside’ or ‘outside’ refers to whether the channel corresponding to channel 12 of FIG. 3, is located inside or outside, respectively). Each wall 2 also has a membrane hinge 24 which divides the wall 2 into two half- lengths 2 a and 2 b, the hinge-profile in this case, in contrast to the profiling of the hinges 21 to 23, being on the inside of the box. A break 25 is provided in the outside-profiled hinge 23 halfway along each wall 2. This enables the two half- lengths 2 a and 2 b of the wall 2 to fold inwardly about the hinge 24, flat onto one another back to back (outside face to outside face) between the two sides 1 in the folded state of the box (FIG. 2).
  • The [0017] base 3 has four membrane hinges 26 profiled on the outside that extend diagonally from the corners of the base 3 to a central, rectangular recess 27. The recess 27, which defines an elongate, double-width membrane-hinge profiled on the outside of the box, extends substantially parallel to the sides 1. Two membrane hinges 28 profiled inside the box extend substantially in alignment with the recess 27 to the hinges 24 respectively, so that two triangular parts 3 a of the base 3 defined between each hinge 28 and its adjacent hinges 26, can fold inwardly onto one another back to back (outside face to outside face), The two parts 3 a fold about their hinges 26 as the half- lengths 2 a and 2 b of the adjacent-wall 2 fold inwardly also. The remaining parts 3 b of the base 3, each having the configuration of a regular trapezium (that is to say, a quadrilateral with opposite, unequal sides parallel and the other two sides equal), fold towards one another (inside face towards inside face) about the two membrane hinges 29 effectively defined along the longitudinal margins of the recess 27.
  • The hinge-configuration of the [0018] base 3 allows it to fold in another mode from that described above and illustrated in FIG. 2. In this latter respect, folding of the base 3 may be inverted such that, rather than folding outwardly with the parts 3 b outside the sides 1, it folds in a mode in which the hinges 26, 28 and 29 turn in the reverse senses to locate the parts 3 b between the sides 1.
  • The box is manufactured by injection moulding in the three-dimensional state. The injection gates are strategically located to ensure that the fronts of the injected material are hot when they meet so that there is good fusion between them. Once the three-dimensional article has been formed and has at least partially cooled, it is folded substantially flat for economic storage and transportation to an appropriate location for filling or other use. Here it is unfolded for erection into its three-dimensional state ready for use. If desired, it can be again folded flat after use, ready for subsequent erection and re-use. [0019]
  • The box described above is open-topped but it may be modified to include a lid for closure, as illustrated in FIG. 12. In this case, the [0020] lid 31 is simply formed integrally with one of the sides 32 of the box, through a membrane hinge 33, and has a hinged-down rim 34.

Claims (11)

1. An article of unitary moulded-plastics sheet construction which is convertible between a three-dimensional erect state and a substantially-flat, folded state, the sheet incorporating a multiplicity of flexible membrane portions located between and integral with spaced parts of the sheet to define hinges for enabling those parts to be deflected angularly with respect to one another in conversion between the two states.
2. An article according to claim 1 wherein each membrane portion is defined by a channel in one of the two faces of the sheet leaving a thin web or membrane contiguous with the two parts of the sheet located either side of the channel, for hinging those two parts to one another.
3. An article according to claim 2 wherein the flanks of said channel are inclined away from one another outwardly of the channel.
4. An article according to claim 3 wherein the angle between the flanks when the two parts located either side of the respective channel are coplanar, is substantially a right angle.
5. An article according to any one of claims 2 to 4 wherein a first plurality of said membrane portions are defined as aforesaid by channels in one face of the sheet and a second-plurality of said membrane portions are defined as aforesaid by channels in the other face of the sheet.
6. An article according to any one of claims 1 to 5 wherein the article in the erect state has the form of a container having at least four walls, each said wall being individually hinged to three said walls by respective ones of said hinges.
7. An article according to claim 6 wherein one of said walls forms a base of the container and the other walls form sides of the container, and the base and one or more of the side-walls each individually incorporates a said hinge to enable that wall to fold onto itself in said folded state of the article.
8. An article according to claim 7 wherein the container is defined by a rectangular base and first and second pairs of opposite side-walls hinged by respective ones of said hinges to the base, each side-wall of the first pair being hinged by respective ones of said hinges to the two side-walls of the second pair, and wherein each side-wall of the second pair of side-walls incorporates a further respective one of said hinges to enable that side-wall to fold onto itself between the side-walls of the first pair of side-walls, in said folded state.
9. An article according to claim 8 wherein a plurality of said hinges are incorporated in the base for enabling the base to fold onto itself in said folded state.
10. An article according to claim 9 wherein an elongate flexible-membrane portion is incorporated in the base to extend substantially parallel to the side-walls of said first pair, and six of said hinges are incorporated in the base, four to extend from said flexible membrane portion to the four corners respectively of the base, and two to extend substantially-aligned with and in opposite directions from said flexible membrane portion.
11. An article according to any one of claims 7 to 10 wherein the sheet incorporates a part defining a lid to said container, the lid being hinged to one of said side-walls by a flexible membrane portion which is integral with that side-wall and the lid.
US10/475,405 2001-04-23 2002-04-23 Articles of unitary moulded-plastics sheet construction Abandoned US20040164132A1 (en)

Applications Claiming Priority (3)

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GBGB0109956.3A GB0109956D0 (en) 2001-04-23 2001-04-23 Unitary-sheet articles
GB0109956.3 2001-04-23
PCT/GB2002/001938 WO2002085594A2 (en) 2001-04-23 2002-04-23 Articles of unitary moulded-plastics sheet construction

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US8033411B2 (en) 2004-04-13 2011-10-11 S.C. Johnson Home Storage, Inc. Collapsible storage device
US8066136B2 (en) 2004-04-13 2011-11-29 S.C. Johnson Home Storage, Inc. Collapsible storage device
US8146773B2 (en) 2004-04-13 2012-04-03 S.C. Johnson & Son, Inc. Collapsible storage device
US8146763B2 (en) 2004-04-13 2012-04-03 S.C. Johnson Home Storage, Inc. Collapsible storage device
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US11618608B2 (en) 2019-11-26 2023-04-04 Pratt Corrugated Holdings, Inc. Perforated collapsible box
US11628978B2 (en) 2017-05-09 2023-04-18 Pratt Retail Specialties, Llc Insulated bag with handles
US11634265B2 (en) 2016-08-16 2023-04-25 Pratt Retail Specialties, Llc Repulpable container
US11692762B2 (en) 2017-07-31 2023-07-04 Pratt Retail Specialties, Llc Modular box assembly
US11713180B2 (en) 2018-05-24 2023-08-01 Pratt Corrugated Holdings, Inc. Liner
US11718464B2 (en) 2020-05-05 2023-08-08 Pratt Retail Specialties, Llc Hinged wrap insulated container
US11724851B2 (en) 2018-11-13 2023-08-15 Pratt Retail Specialties, Llc Insulated box assembly with overlapping panels
US11858717B2 (en) 2017-05-09 2024-01-02 Pratt Retail Specialties, Llc Insulated box
US11919699B2 (en) 2019-05-02 2024-03-05 Pratt Retail Specialties, Llc Box defining walls with insulation cavities
WO2024243544A1 (en) * 2023-05-25 2024-11-28 Sonoco Development, Inc. Foldable container
US12195266B2 (en) 2018-11-13 2025-01-14 Pratt Retail Specialties, Llc Insulated box assembly
US12270153B2 (en) 2021-02-11 2025-04-08 Pratt Corrugated Holdings, Inc. Starch-cellulose composite material

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GB2375100B (en) 2003-06-11
GB0209271D0 (en) 2002-06-05
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WO2002085594A3 (en) 2003-02-27
AU2002251335A1 (en) 2002-11-05
WO2002085594A2 (en) 2002-10-31
GB0109956D0 (en) 2001-06-13
EP1383635A2 (en) 2004-01-28

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