Classifications

• • 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
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
  • B65D5/12—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end closures formed separately from tubular body
  • B65D5/14—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end closures formed separately from tubular body with inset end closures
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
  • B65B3/02—Machines characterised by the incorporation of means for making the containers or receptacles
  • B65B3/025—Making parallelepipedal containers from a single carton blank
• • 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
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/42—Details of containers or of foldable or erectable container blanks
  • B65D5/70—Break-in flaps, or members adapted to be torn-off, to provide pouring openings
  • B65D5/708—Separate tearable flexible elements covering a discharge opening of a container, e.g. adhesive tape

Definitions

• the present invention is concerned with a method for preparing a cardboard container with sharp corners at the bottom and with a box blank to be used for the container.
• the cardboard must be perforated in the packaging machine and the machine must be provided with two or three additional material lines, in which case the system becomes quite complicated and difficult, e.g., from the aseptic point of view.
• a packaging system is also in use in which the cardboard is introduced into the packaging machine as blanks sealed at the side joint, wherein the fibre direction can be made parallel to the bottom.
• the con ⁇ tainer may be provided with a ridge-shaped lid fold by hot-sealing, a pouring spout being formed by opening the fold.
• the package can be opened quite easily if the joint is not made- very tight. In aseptic containers, the lid joint must, however, be closed tightly, and its opening is no longer very easy.
• This packaging system is not particularly practical, because the blanks sealed at the side require an abundance of transportation space, the ridge fold requires a lot of extra material, and the ready container requires extra space and is even otherwise difficult to store and to transport.
• a packaging system is also known in prior art in which a cardboard tube is prepared which has a square section and is rounded at the corners and to whose ends a lid and a bottom are attached by hot-sealing partly inside and partly outside the edge, the said lid and bottom being made of separate plastic/aluminium laminate.
• a cardboard tube is prepared which has a square section and is rounded at the corners and to whose ends a lid and a bottom are attached by hot-sealing partly inside and partly outside the edge, the said lid and bottom being made of separate plastic/aluminium laminate.
• the lid part of the container together with the opening and closing con- struction included in it, is prepared out of a separate film-like material. All the rest of the container, including the bottom, is made of one blank.
• the cardboard blank is sealed at the side joint so that the corners at the • mouth of the container become rounded.
• the lid part made of a film-like material, for example cardboard or plastic or aluminium laminate, is .attached to the mouth of the. container, whereby, owing to the rounded corners,. a tight, liquid-proof joint is obtained at the edge of the lid material.
• the container is filled through the bottom, and finally the bottom is closed by sealing and folded to sharp-cornered form.
• the ready container is rectangular in shape, its bottom and lid are plane, and therefore it is favourable for distribution systems.
• the lid material makes about 10 to 15 per cent of the material of the whole container.
• the lid blanks are prepared preferably so that the desired opening and closing constructions are formed in the material roll as appropriately spaced.
• the lid blanks are introduced into the packaging machine from a roll, from which a piece slightly larger than the mouth of the container is cut, which said piece is hot-sealed onto the inner edge of the container mouth with the edges of the lid outwards.
• the container is provided with an opening construction of desired sort in a simple way, without making the packaging machine complicated. Only two lines of material have to be passed into the packaging machine, whereby it is easier, for example, to maintain aseptic conditions.
• the blank which forms the main part of the container is fed into the packaging machine preferably as a plane open sheet, into which the grooves have been pressed which form the side edges as well as the folds and joints at the bottom.
• the grooves for the side edges do, however, not extend up to the upper edge of the sheet, but their extensions are provided with form pressings facilitating the rounding.
• the fibre direction in the cardboard is pre ⁇ ferably perpendicular to the side edges, in which case the container becomes rigid.
• the container is intended in particular for liquid products, but it is also, better than the prior- art containers, -suitable for liquids of high viscosity, liquids that contain particles or liquids that solidify upon filling as well as for dry products.
• Figure 1 shows a grooved blank sheet.
• Figure 2 the sealing of the side joint of the blank.
• Figure 3 the cutting of the lid blank.
• Figures 4 to 6 the folding of the bottom, and Figure 7 a finished container.
• the side walls and the bottom of the container are made out of a box blank in accordance with Fig. 1.
• the blank is made of cardboard coated with polyethene film, and it is provided with grooves arranged in a suitable way.
• the side edges 1 and 2 of the blank are hot-sealed overlapping each other. In order that liquid could not penetrate into the paper via the lower edge 1 in the overlapping joint, the edge is protected by a plastic tape, or it is folded into the joint.
• the blank is provided with grooves 4 -parallel to the side edges, which said grooves form the side edges of the container so that a finished container has a rectangular section.
• the grooves 4 do not extend up to the edge, but, as an extension of each groove, there is a form-pressed zone 6 between the groove and the edge. In this way, rounded corners 16 are formed at the top edge 5 of the container (Fig. 2) .
• the bottom part of the blank near the bottom edge 7, there is a groove 8 parallel to the bottom edge, along which the bottom is hot-sealed, a groove 9, which forms the bottom edge of the container, as well as, between them, at the narrow sides of the container, grooves 10 for the projecting tongues.
• the bottom of the container is formed by folding along the grooves in the bottom part ( Figures 4 to 6) .
• the blank is folded along the grooves 4 around a mandrel 11 to make a tubular blank 17, so that the top edge of the blank is placed at the side next to the end of the mandrel, whereupon the edges 1 and 2 are joined by hot- sealing so that they overlap each other and that the edge 1 remains inside.
• Fig. 3 shows a rolled lid-blank band, which is made of the same material as the side-wall and bottom blank.
• the band 12 is provided with holes 13 spaced in accordance with the dimensions of the lid and closed by means of an opening construction 14.
• a lid blank 15 is cut out of the band 12, which said blank is shaped like the lid of the container but is slightly larger than the lid.
• the lid blank 15 is pressed into the top end 5 of the folded and side-sealed box blank so that the edges of the lid blank become directed outwards.
• the joint is sealed, and it is closed by hot-sealing.
• the container is turned so that its lid is facing downwards, and filled (Fig. 4) Thereupon the bottom joint is closed by heating, and the folds are bent so as to make a plane bottom (Figs. 5 and 6) .

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Cartons (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8521797

Family Applications (1)

Country Status (3)

Families Citing this family (11)

Family Cites Families (11)

• 1985
  • 1985-12-04 FI FI854818A patent/FI854818A0/fi not_active Application Discontinuation
• 1986
  • 1986-12-01 WO PCT/FI1986/000142 patent/WO1987003536A1/en unknown
  • 1986-12-01 EP EP19870900149 patent/EP0248864A1/de not_active Withdrawn

Non-Patent Citations (1)

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