Three Or More Trapezoidal Walls (e.g., Truncated Pyramid-shaped Box) Patents (Class 229/113)
  • Patent number: 10858140
    Abstract: A flat pack container is capable of formation by folding of a flat panel of foldable material to form the container, the flat panel having an inner surface and an outer surface. A first portion of the flat panel is capable of forming a base of the container and has at least one peripheral fold line. Extending from the at least one peripheral fold line is a second portion which co operates with the base to form a wall of the container. The wall of the container includes at least two foldable pleated regions which enable the wall to be set in upright attitude to define with the base an internal space: the second portion further including flaps which retains the container in its folded configuration.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: December 8, 2020
    Inventor: Jack Moon
  • Patent number: 10492633
    Abstract: According to an example aspect of the present invention, there is provided a paper cup comprising: a base; a sidewall; said base and said sidewall together defining a space for receiving liquid or food; an upper end portion of the cup comprising a first and second pair of opposing closure panels, whereby each panel is attached to an upper edge of the sidewall via a respective first folding line and to adjacent panels via respective second folding lines. Said panels are foldable into a closed position to form a lid of the cup. Each panel of said first pair contains two additional folding lines to enable folding inwards. Upon folding to the closed position, a first panel of said second pair is partly inserted below a second panel of said second pair, and the panels of said second pair close the upper end portion.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: December 3, 2019
    Assignee: Metsä Board Oyj
    Inventor: Alan Li
  • Patent number: 10118751
    Abstract: A corrugated board carrier for an interior bulk beverage container is provided with a larger base, integral handles, and a ramp insert to promote gravity dispensing of beverages therein through a spout.
    Type: Grant
    Filed: October 30, 2016
    Date of Patent: November 6, 2018
    Assignee: Southern Champion Tray, L.P.
    Inventors: Ron Couvillon, Candace Carlton, Stokes Smith, Anne Hooser, Sarah Williams, Matt Raus, Jason Ray
  • Patent number: 9737161
    Abstract: According to an example aspect of the present invention, there is provided a paper cup comprising: a base; a sidewall; said base and said sidewall together defining a space for receiving liquid or food; an upper end portion of the cup comprising a first and second pair of opposing closure panels, whereby each panel is attached to an upper edge of the sidewall via a respective first folding line and to adjacent panels via respective second folding lines. Said panels are foldable into a closed position to form a lid of the cup. Each panel of said first pair contains two additional folding lines to enable folding inwards. Upon folding to the closed position, a first panel of said second pair is partly inserted below a second panel of said second pair, and the panels of said second pair close the upper end portion.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: August 22, 2017
    Assignee: Metsä Board Oyj
    Inventor: Alan Li
  • Patent number: 9415997
    Abstract: An improved paperboard structure to hold a fluid filled carton is provided.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: August 16, 2016
    Assignee: Southern Champion Tray
    Inventors: George Coogan, Jason Ray, Stokes Smith, Bill Jones, Ron Couvillon
  • Patent number: 9049846
    Abstract: A foldable poultry brood box having a folding bottom, folding endwalls, and folding sidewalls provides a sheltered environment for the maturation of a brood of young poultry. Preferably, after the brood box is deployed, a floor overlay insert is placed and retained within the brood box to overlay, bridge over, and cover substantial portions of two floor free edges.
    Type: Grant
    Filed: September 9, 2012
    Date of Patent: June 9, 2015
    Inventor: Robert W. Eason
  • Patent number: 8317150
    Abstract: A shipping base shaped like a square, truncated pyramid for use with a washing machine of the type having an undercarriage suspended below the wash tub. The shipping base has an opening in the top of the truncated pyramid into which the washing machine undercarriage is lowered until the undercarriage is suspended within the space defined by base, and an integrally formed frame-like pallet for supporting the washing machine. The opening is only slightly larger than the dimensions of the undercarriage so that the shipping base prevents any significant lateral movement of the undercarriage or the washing machine tub.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: November 27, 2012
    Assignee: Sonoco Development, Inc.
    Inventor: James R Baechle
  • Patent number: 8074952
    Abstract: A shipping base shaped like a square, truncated pyramid for use with a washing machine of the type having an undercarriage suspended below the wash tub. The shipping base has an opening in the top of the truncated pyramid into which the washing machine undercarriage is lowered until the undercarriage is suspended within the space defined by base, and an integrally formed frame-like pallet for supporting the washing machine. The opening is only slightly larger than the dimensions of the undercarriage so that the shipping base prevents any significant lateral movement of the undercarriage or the washing machine tub.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: December 13, 2011
    Assignee: Sonoco Development, Inc.
    Inventor: James R Baechle
  • Patent number: 7798327
    Abstract: A multi-pack sanitary napkin container includes a flexible outer container and first, second, third, and fourth pluralities of sanitary napkins respectively. Such first, second, third, and fourth pluralities of sanitary napkins are vertically stacked within an interior portion of the container. The kit further includes a mechanism for securing the container about the first, second, third, and fourth pluralities respectively of sanitary napkins when the first, second, third, and fourth pluralities of sanitary napkins are vertically stacked within the interior portion of the container.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: September 21, 2010
    Inventors: Samir Berkani, Farah M. Charles
  • Patent number: 7798390
    Abstract: An openable packaging for enclosing objects. A one-piece blank is folded into a packaging for enclosing objects, the packaging having two covers, each cover having at least one corner made of three wall elements joined to form a respective corner, the two corners overlapping when in the closed position to completely enclose the space in the package and lend stability to the package, and the two corners essentially retaining their shape when the package is opened. The three dimensional corner is formed via glued flaps.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: September 21, 2010
    Inventor: Martin Posselt
  • Patent number: 7798325
    Abstract: A wedge-shaped receptacle (9) is provided for packaging felting needles (8). The wedge shape is configured in such a manner that the felting needles lie in the receptacle in a mutual lateral engagement, that is, they are held approximately parallel to one another and they firmly clamp one another without their tips abutting against the receptacle body. This, on the one hand, results in a particular protection of the felting needles (8) during transportation and, on the other hand, results in a simple handling with the lowest danger of injuries.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: September 21, 2010
    Assignee: Groz-Beckerg KG
    Inventors: Gustav Wizemann, Rene Conzelmann
  • Patent number: 7677434
    Abstract: A stackable container has a bottom panel, upstanding sidewalls, upstanding end walls, and an open top. According to one aspect of the invention, narrow reinforcing flaps are attached to the upper edge of at least one of the side and end walls, defining a stacking ledge and reinforcing the walls against outward bulge. The reinforcing flaps extend over only a small portion of the height of the side or end wall, and corner post flaps extend from opposite ends of the reinforcing flaps, extending diagonally across interior corners of the container. According to another aspect, the side and/or end walls lean inwardly, defining a narrower footprint at the top of the container than at the bottom. In a specific embodiment one of the walls leans in more than the other. According to a further aspect, an indexing and aligning tab extends upwardly from an upper edge of the container, and a complementary notch is formed in a lower edge for receiving the tab when the containers are stacked.
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: March 16, 2010
    Assignee: International Paper Company
    Inventor: Stanley L. Fry
  • Patent number: 7631799
    Abstract: A collapsible storage device includes a collapsible container and a lid for the container. The container includes a plurality of resilient wall panels and a hinge portion connecting each adjacent pair of wall panels. The container may be foldably converted between a substantially flat collapsed position and a substantially rectangular prismatic expanded position by articulating the wall panels about the flexible hinges. At least one of the hinge portions is arched to latch the container in the expanded position. The lid may be used to cover the container in the expanded position and receive the container in the collapsed position.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: December 15, 2009
    Assignee: S.C. Johnson Home Storage, Inc.
    Inventors: Robert R. Turvey, Brian C. Dais, Sanjay Dhall, Daniel Zimmerman
  • Patent number: 7628311
    Abstract: A folded food carton is formed from a matable, lay flat blank for retaining, transporting and serving hot food such as pizza. The blank includes an arrangement of end panels, side panels and cover panels foldable relative to a bottom panel such that, in the erected carton, the cover panels overlap and are interlocked with the side panels by means of offset locking tabs. The end panels slant upwardly and inwardly from the bottom panel to add rigidity and save material for the carton. The side panels flare upwardly and outwardly from the bottom panel and extend above the cover panels to enhance stackability and prevent shifting of stacked cartons one on top of the other. Several methods of packaging pizza in the folded carton are disclosed.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: December 8, 2009
    Assignee: International Paper
    Inventors: Wayne H Kuhn, Frank Pizzitola
  • Patent number: 6443357
    Abstract: An object is to secure a sufficient area for bonding a spout open/close member (51). A packaging container has a pair of seal portions; at least five side-surface panel portions (27) for forming a circumferential wall; an end-surface panel portion (35) disposed between the seal portion and the side-surface panel portions (27) and adapted to form a polygonal end-surface portion in cooperation with an intermediate portion (15a) of the seal portion; and flap portions (31) projected, together with end portions (15b) of the seal portion, from the end-surface panel portion (35), each of the flap portions (31) being bent toward a specified panel portion (27a) among the side-surface panel portions (27) and being welded to the specified panel portion (27a). In this case, since the flap portions (31) are welded to the specified panel portions (27a), and the end-surface portion is thus made substantially flat, a sufficiently large flat area can be secured on the end-surface portion.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: September 3, 2002
    Assignee: Tetra Laval Holdings & Finance, S.A.
    Inventors: Peter Marbe, Patrik Hylta
  • Patent number: 6227439
    Abstract: Liquid resistant containers having double walled construction and an upwardly projecting container bottom are suitable for use, e.g., as a flower vase. Preferably, the containers are formed from a unitary carton blank having fold lines such that the container is prepared by folding the blank along fold lines to form the open-ended container, the cavity of which is lined with a liner or open bag to provide further resistance against leaks.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: May 8, 2001
    Assignee: Multi-Pak AS
    Inventor: Henrik Hansen
  • Patent number: 6170739
    Abstract: A foldable container made of a liquid resistant carton blank has a bottom bracing and bottom closing tab or portion that provides rigidity when the container is expanded for use.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: January 9, 2001
    Assignee: Multi-Pak A/S
    Inventor: Henrik Hansen
  • Patent number: 6019277
    Abstract: The invention relates to a collapsible beverage container produced froma foldable sheet-like blank and provided with a closed bottom and sidewalls upstanding from the bottom. Integrated with the side walls in an extension thereof are inwardly foldable container closing top flaps. The sheet-like blank may also include a drinking tube forming part which cna be folded into a drinking tube at one corner of the container. The invention also relates to a bottom closure suitable for a beverage container, among other things.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: February 1, 2000
    Assignees: Bjorn Elfvin, Rolf Lundstrom
    Inventor: Jan-Inge Lundstrom
  • Patent number: 6016953
    Abstract: The present invention is tetrahedral top carton and a blank therefor. The carton has at least a nine percent material savings over a traditional gable top carton containing an equal volume of product. The carton has a tetrahedral top structure formed from four top panels intersecting and sealed adjacently. The carton may have a fitment thereon for accessing the contents. The fitment may be placed on the pinnacle of the tetrahedral top structure or on a single top panel. The carton may have outward folded fins projecting from the intersection of the top panels, or the fins may be folded inward to create a diagonal crease/edge in the intersection between adjacent top panels. The carton may also have an overfolded bottom for reverse filling on a form, fill and seal packaging machine.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: January 25, 2000
    Assignee: Tetra Laval Holdings & Finance, SA
    Inventors: Russell Stacy-Ryan, Hichem Bouraoui, Nicholas Cook
  • Patent number: 6012631
    Abstract: The present application discloses a carton (2) which includes a base panel (12) having an outer portion and a side wall (38, 40) that is generally perpendicular to the base panel. The base panel includes a marginal flange (34) that is foldably connected to the outer portion of the base panel, which marginal flange overlies the base panel. The side wall includes a marginal flange that is foldably connected thereto, which side wall marginal flange overlies the base panel marginal flange. The base panel marginal flange is secured to the base panel or to the side wall marginal flange. The invention extends to a one-piece "book-pack" type carton and to corner constructions.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: January 11, 2000
    Assignee: Concept Packaging Limited
    Inventor: Christopher Hallam
  • Patent number: 5788145
    Abstract: A covered food container especially adapted to hold a single slice of pizza or the like is described having a polygonal configuration and an integrated cover which folds over and is securely latched to enclose the contents. The covered food container can be formed from a single sheet of material such as cardboard or styrene foam and has the advantage that the top and base trays forming the container are interchangeable.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: August 4, 1998
    Assignee: Bell Paper Box, Inc.
    Inventors: Mark S. Grahahm, Gregory A. Green
  • Patent number: 5673847
    Abstract: A container has a rectangular base and side walls inwardly extending from the base to provide a truncated tetrahedron shape with an open top. Handles are on opposing side walls to enable the carrying of the container.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: October 7, 1997
    Inventor: Arthur R. Swink
  • Patent number: 5603450
    Abstract: A fast food carton including a tray with peripheral walls integral with a bottom panel and individually foldable relative thereto between a first position substantial coplanar therewith and a second folded position forming a peripheral wall thereabout, and a lid integral with one of the tray walls and selectively foldable to cover the tray with the tray walls retained in the folded position within the lid. The carton further includes a lock assembly having a tongue integral with the tray front wall and outward projectable through a slot formed in the lid, the lid having openings defined therein for facilitating manual manipulation of the lock assembly for release.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: February 18, 1997
    Assignee: Dopaco, Inc.
    Inventor: Simon Whitnell
  • Patent number: 5522537
    Abstract: A carton has a top wall having eight side edges which circumscribe a top wall surface area and a bottom wall having four side edges which circumscribe a bottom wall surface area. Four trapezoidal side walls, each having a major edge, a minor edge and two side edges, extend between the top wall and the bottom wall, such that the major edges of the sidewalls abut, respectively, adjacent of the side edges of the bottom wall and such that the minor edges of the sidewalls abut, respectively, alternate of the side edges of the top wall. The carton has four triangular corner wall portions, each having a base, which abuts the top wall at a position displaced inwardly from one of the top wall edges that does not abut one of the minor edges of the side walls, and two sides, one of which abuts one of the side edges of one of the adjacent side walls. A device for opening the carton is positioned in one of the trapezoidal side walls, and a line of weakness is positioned in the bottom wall or in the top wall.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: June 4, 1996
    Assignee: Nestec S.A.
    Inventor: David A. Barlow
  • Patent number: 5305951
    Abstract: An erectable container apparatus constructed from a substantially square blank of material for use in releasably storing various articles therewithin. The apparatus includes a plurality of side panels each having an inner edge attached to a base portion, an outer edge attached to a corresponding top flap member, and a left and right edge. The left and right edges are operably positioned at acute angles relative to the respective inner edges to which they intersect so as to provide substantially upright and inwardly sloping side panels upon articulation of the erectable container apparatus toward and into its fully articulated orientation. Locking elements are operably associated with at least two of the top flap members for releasably locking the erectable container apparatus in a fully erected orientation, as well as to releasably maintain the top flap members and the inwardly sloping side panels in a base and article covering orientation.
    Type: Grant
    Filed: June 3, 1993
    Date of Patent: April 26, 1994
    Assignee: Stone Container Corporation
    Inventors: Wayne H. Kuhn, Jeffrey S. James
  • Patent number: 5264996
    Abstract: A flat blank of stiff, foldable paper or paperboard is folded to form a multi-sided luminary with a top in the shape of truncated, open top pyramid. One end of each of the sides includes a trapezoidal panel extending therefrom, the longest base of the trapezoidal panel being substantially the same length as and foldably secured to the adjacent end of the corresponding side. Each of the sides of the luminary include one or more cutouts giving the appearance of a seasonal symbol. The bottom is closed and, in a preferred embodiment, includes a seat therein for retaining a light source such as a candle.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: November 23, 1993
    Inventors: Anthony J. Bele, Jr., Peter A. Kazmar
  • Patent number: 5263612
    Abstract: A container in the form of a six-sided enclosure having opposing top and bottom walls, opposing side wall inner panels which are hingedly connected to opposing edges of the bottom wall, and opposing end walls formed from a corrugated or solid fibreboard blank. A pair of flaps are hingedly connected to opposing sides of each of the end walls and are adapted to overlie an adjacent side wall inner panel. A pair of side wall outer panels are hingedly connected to opposing edges of the top wall and each is adapted to overlie the flaps which overlie the adjacent side wall inner panel.
    Type: Grant
    Filed: April 6, 1993
    Date of Patent: November 23, 1993
    Assignee: Packaging Corporation of America
    Inventor: Terrill L. Nederveld
  • Patent number: 5253801
    Abstract: A flanged tray and preform for making it. The preform includes a cut and scored paperboard blank having a polygonal bottom forming base panel. Each edge of the base is foldably joined to a radially outwardly extending, regular trapezoidal sidewall forming panel. The radially outermost portion of each sidewall panel carries a horizontal flange forming flap. The preform also includes a thin plastic sheet adhered to one surface of the paperboard blank. The plastic sheet covers the blank and extends over radially extending gaps between the side edges of next adjacent sidewall panels. The preform is placed in a female die with the plastic film facing upwardly. A male die presses the preform downwardly to form it into a tray having a peripheral, horizontally extending flange. The step of permanently attaching the plastic film to the paperboard blank may be carried out concurrently with the step of deforming the blank in the die.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: October 19, 1993
    Assignee: International Paper Company
    Inventors: Linda A. Bernstein, Robert L. Gordon, Tung C. Ma, Robert Sosnowksi
  • Patent number: 5163609
    Abstract: A single piece corrugated paperboard blank is cut and scored to provide a field erectable container without the use of any additional elements for locking pieces together. The container is one having inclined side walls so that the produce, such as asparagus or green onions, which is stacked in a vertical orientation may be packaged and held in place during shipment. The bottom of the erected container is larger than the top and an integral opposed strapping arrangement is provided whereby a plurality of flaps or panels are arranged to be folded into an orientation and locked in place to provide a field erected container which has great vertical stacking strength. Sufficient cooling vents are provided as are opposed hand holds. Upstanding stacking tabs are also provided so that one packed container may be stacked atop another and be substantially held in place.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: November 17, 1992
    Assignee: Weyerhaeuser Company
    Inventor: H. Donald Muise, Jr.
  • Patent number: 5148972
    Abstract: A food container for holding fast food or other similar article is disclosed. The container is constructed from a cardboard blank which is cut and scored to define a top and bottom portion joined by a common back panel which is hinged. The bottom side panels each contain a single punch out tab whereby a user can insert his thumb to underlie the food article being consumed with his other fingers gripping the top of the food item to be consumed. The container further comprises a flip down front panel scored to a level above the bottom of the food container thereby allowing access to the food item for consumption yet not allowing juices from the food item to emerge from the food container.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: September 22, 1992
    Inventor: Robert E. Clayton
  • Patent number: 5038998
    Abstract: A tote container for perishable produce such as asparagus comprising a pair of identical molded end shells which form the side walls of the tote container, with an intermediate blank cut and scored from a sheet material such as double-faced corrugated plastic extending between and securely attached to each of the end shells. The blank is folded to form a bottom panel, back panel, pivoting top lid and front lid panels, and a front tray panel to the tote container. The tote container defines a receptacle region with an open top and front, and the blank defines a bottom tray portion within that receptacle region.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: August 13, 1991
    Assignee: Liberty Diversified Industries
    Inventors: Richard J. Morris, David T. Sarych, Mark S. Stoll, LeRoy Miller, Stanley R. Thorud
  • Patent number: 5014905
    Abstract: A tube type carton formed from a unitary blank of paperboard and having at each end closure panels defined by a pair of opposed dust flaps and opposed major and minor closure flaps. The major flaps and two opposite side wall panels of the four side panels are trapezoidal. The remaining two opposite side wall panels are square but of different size. A pair of rectangular interior tucking panels joins one edge of the smaller square side wall panel to the shortest edge of one of the two opposite trapezoidal side wall panels, these interior panels being tucked into the interior of the carton. By virtue of the tucking, the cross-section of the tube is changed from rectangular to trapezoidal. The fully erected configuration of the carton is that of a truncated, right, four-sided, rectangular pyramid.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: May 14, 1991
    Assignee: International Paper Company
    Inventor: Benjamin J. Cassidy
  • Patent number: 4941427
    Abstract: A spray booth (1) for use when spraying artwork is of pyramidal shape, and foldable for storage. An aerosol spray may be applied to the artwork via an aperture (6) at the apex of the pyramid which can then be closed by a flap (7) while the aerosol settles.
    Type: Grant
    Filed: September 20, 1988
    Date of Patent: July 17, 1990
    Assignee: Esselte Pendaflex Corporation
    Inventor: Vazgen J. Houssian
  • Patent number: 4869424
    Abstract: A reusable open top case having rectangular interconnected bottom, side and end panels is provided with a disposable cover which includes a top wall overlying the open top of the case and which also includes side and end walls foldably joined to the top wall of the cover together with web structure interconnecting the corners of the side and end walls.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: September 26, 1989
    Assignee: The Mead Corporation
    Inventor: Prentice J. Wood
  • Patent number: 4801077
    Abstract: The carton is comprised of a corrugated paperboard tray and a corrugated paperboard cover. The tray has upstanding side wall panels and upstanding end wall panels, the upstanding end wall panels having hand holes for lifting the tray. The cover has a top panel provided with a non-slip surface, trapezoidally configured side wall pane=ls and trapezoidally configured end wall panels. Each of the side wall panels and the end wall panels of the cover are hingedly connected to the top panel by reason of weakened fold lines. The corrugations of the cover extend at right angles to the fold lines for the cover's end wall panels so as to provide a greater degree of deflective resistance to the cover's end wall panels then that imparted to the cover's side wall panels with the consequence that the end wall panels of the cover exert a greater amount of pressure against the end wall panels of the tray than that exerted by the cover's side wall panels.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: January 31, 1989
    Assignee: General Mills, Inc.
    Inventors: Blaine Sweatt, III, Stephen E. Moorman
  • Patent number: 4778392
    Abstract: A block set, each block including a generally cubical portion with a frusto-pyramidal or convex portion, and an oppositely disposed frusto-pyramidally configured mating concave portion for interlocking. Each of the fourteen surfaces or sides thus formed includes a substantially similar pictorial depiction of an object, such as an animal or the like, with a letter imprinted on the object, preferably in a portion of the object which bears a resemblance to the letter. The edges of each side of the block are colored, with each edge being a different color for promoting color awareness, with the like colored edges of adjacent blocks establishing a preferred orientation for pictorial and indicia alignment. The individual pictorial representations on adjacent surfaces of the same block are oriented in different orthogonal directions for enabling reading of a word on the adjoined surfaces of adjacent blocks on at least one other of the adjoined surfaces of the blocks.
    Type: Grant
    Filed: September 26, 1986
    Date of Patent: October 18, 1988
    Inventor: Leslie K. Mitchell
  • Patent number: 4705209
    Abstract: An erectable container formed by folding a single base board, in which a bottom surface is made in a polygonal form having more than six sides of an even number, first and second side plates are alternately integrally provided extending from each side of the bottom surface provided with a concave fold line, a lid plate is integrally provided at the edge of the first side plate, a tab is integrally provided at the edge of the second side plate, the second side plate being provided with two first convex fold lines extending till upper ends from each vertex at the lower end thereof and the tab being provided with two second convex fold lines extending till upper ends from each end of the first convex fold lines and approaching toward each other with an inclination greater than that of the first convex fold lines, and the boundary line between the second side plate and the tab is made a concave fold at the portion between each end of the first convex fold.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: November 10, 1987
    Assignee: House Food Industrial Company Limited
    Inventors: Takeo Fujihara, Akira Yamatani, Masanori Yamamoto, Yuji Kunimoto