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
  • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
  • B65D65/02—Wrappers or flexible covers

Definitions

• the present invention relates to a band-form material suitable for packaging products into an at least partly ga permeable and at least partly transparent package in a so- called flow-pack packaging machine.
• This object is achieved according to the invention by fabricating the packaging material from one or several band of a gas-permeable material and one or several bands of a transparent film, and attaching the band of the gas- permeable material at its lateral edge to the lateral edge of the band of transparent film, and applying an adhesive to the band of transparent material onto at least a part of those areas which form the seam areas of the fabricated package.
• the shapes of the band edges of the gas-permeable material as well as those of the transparent film can be varied to achieve a desired shape of the transparent area.
• the packaging material is fabricated from two bands of gas-permeable material and of a film band of transparent material placed between the two bands.
• a preferred type of the gas-permeable material is paper, while the transparent film is preferredly of a plastic polymer material.
• the band of gas-permeable material and the band of transparent film are attached to each other by an overlapping seam, whereby the sealant adhesive is a room- temperature bonding type of adhesive.
• the band of transparent film, or alternatively, a layer placed on the film is preferredly of a material, which is capable of heat-sealing with the band of the gas-permeable material.
• the glue applied on the band of gas-permeable material is preferredly capable of heat-sealing.
• Figure 1 shows diagram atically a cross-section of the packaging material in accordance with the invention
• Figure 2 shows a top view of the packaging material illustrated in Fig. 1 at a point of the surface forming th inside of the package
• Figure 3 shows a similar view to that of Fig. 2 for anothe embodiment of the packaging material.
• the reference number 1 designates a general form of the band-form packaging material in a diagrammatic cros section.
• the packaging material 1 is formed from two bands of gas-permeable material, for instance, of paper band 2 and a band of transparent film, for instance, a polymer film 3 placed between the paper bands.
• the band 2 of gas-permeable material is attached at its lateral edge area 2 ' to the corresponding lateral edge are 3' of the transparent film band 3 preferredly using an overlapping seam sealed using a room-temperature bonding type of adhesive 5.
• the package is fabricated around the product to be package in a flow-pack machine of conventional technology by seamin the free lateral edge areas of both bands 2 of the gas- permeable material to each other.
• the band 2 has been coated along the free edge of the band 2 with a glue 4 as illustrated in Fig. 2.
• the upside shown in Fig. 1 forms the inside of the final package.
• the band 3 of transparent film is of such material that can be, for instance, heat-sealed to the band 2 of gas-permeabl material in the cross direction of the packaging material 1 Thence, the ends of the package can be closed by heat- sealing.
• the band 3 can be inherently heat-sealable, or alterna ⁇ tively, it can be provided with a heat-seal layer produced by, for instance, applying a coat of lacquer.
• the glue 4 can be applied, for instance, according to Fig. 3 to points forming the seams of the package, whereby continuously sealed area is formed by the glue 4 with the band 3 of transparent film in the cross-direction of the packaging material band.
• the packaging material 1 according to the invention is produced as follows:
• a web of gas-permeable material paid off from a roll is coated with a heat-sealable glue 4 at desired points and th possibly desired imprintings are made.
• the web is sli into bands 2 of desired width and edge shape, and a band 3 of transparent film material is seamed to the bands by the methods of conventional technology using, for instance a room-temperature bonding type of adhesive 5.
• the ready-to- use packaging material is wound into smaller rolls for delivery to customers, who then can use the material in a flow-pack machine for a simultaneous fabrication of the product package and insertion of a product into the packaging material using conventional technology.
• the packaging of a product into the packaging material 1 is performed by placing the product onto the band-form packaging material illustrated in Fig. 1, after which the flow-pack machine automatically turns the lateral edges of the packaging material up and presses the glue-coated area 4 together, whereby a vertical seam is formed which remain in the ready package outside the package.
• the cross- direction seams of the package are formed by compressing t tubular packaging material, which contains the inserted product, at both ends close to the product, whereby the gl 4 or the heat-sealable layer of band 3 seals the package a the seal areas thus permitting the packages containing the products to be separated from each other.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Packages (AREA)
• Wrappers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8527814

Family Applications (1)

Country Status (2)

Cited By (8)

Citations (3)

• 1989
  • 1989-02-01 FI FI890465A patent/FI85843C/fi not_active IP Right Cessation
• 1990
  • 1990-01-31 WO PCT/FI1990/000032 patent/WO1990008708A1/en unknown

Patent Citations (3)

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