Classifications

• • 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
  • B65B25/00—Packaging other articles presenting special problems
  • B65B25/06—Packaging slices or specially-shaped pieces of meat, cheese, or other plastic or tacky products
  • B65B25/068—Packaging slices or specially-shaped pieces of meat, cheese, or other plastic or tacky products of cheese
• • 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
  • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
  • B65D75/52—Details
  • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
  • B65D75/66—Inserted or applied tearing-strings or like flexible elements
  • B65D75/68—Inserted or applied tearing-strings or like flexible elements extending through wrapper closure or between wrapper layers
• • 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
  • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
  • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
  • B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
  • B65D85/76—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials for cheese
• • 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
  • B65D2301/00—Details of blanks
  • B65D2301/10—Blanks mutually positioned to minimise waste material upon cutting out the individual blank from a continuous or large sheet

Definitions

• the invention relates to a plastic package, its manufacturing method and a manufacturing device. It is particularly suited to the field of food packaging for parallelepipedic, prismatic or cylindrical packaging, and thus also relates to a method of packaging a food product.
• a first solution of the prior art concerns an aluminum packaging as disclosed by the patent FR2012286. Its manufacturing process includes the folding and joining of several aluminum sheets. Aluminum is a product whose obtaining and recycling require a great expenditure of energy and it is desirable not to use it.
• the document EP0803439 describes a polypropylene packaging, manufactured by the combination of three plastic sheets, one of which is shaped around a mandrel.
• the disadvantage of this manufacturing process is its complexity because it requires the cutting and joining of three sheets and a construction around a mandrel.
• WO2004 / 052753 is based on the cutting of a main sheet, which represents a large area of the finished package and comprises a protruding portion defining an opening tab, to which a cover is added.
• the disadvantage of this method stems from the fact that the complex shape of the proposed sheet leads to significant material drops when it is cut from a rectangular plastic film.
• the film is coated with an adhesive to promote hot glue on the lid and get the seal of the package, there is a risk of getting the glue of the opening tab on the lid since it is also coated with this glue and that the entire
• the process is based on heating and optionally hot food content during its packaging, which makes it difficult to use.
• a general object of the present invention is to provide a package and its manufacturing method which have the advantages of the prior art without the disadvantages.
• a first object of the invention is to provide a packaging and its manufacturing process simpler, economic and ecological.
• a second object of the invention is to provide a method of manufacturing a packaging adapted to the field of food packaging.
• the invention is based on a method of manufacturing a package, characterized in that it comprises the following steps:
• the film is a plastic film, one side of which is coated with a heat-sealable material.
• Step a) may further comprise a step of transporting, reversing and welding a triangular fall of the film on the projecting triangular portion of corresponding size, bringing into contact the two heat-sealable coated surfaces of the two parts, for form the opening tab.
• Steps b) and d) may include hot bends.
• the method may include a step of cutting a thin tear strip and a step of bonding the tear strip to the sheet so that it extends from the end of the opening tab to a length important leaflet, and / or a step of making pre-cuts on the opening tab.
• the invention also relates to a package comprising a main sheet occupying its largest area, comprising a cover, flaps of the leaf folded on the cover, characterized in that one of the flaps comprises a substantially triangular projecting portion, the oblique edge of which delimiting the triangular portion is symmetrical about its center so that it can place several sheets of the same form staggered on the same film.
• the angular portions of the sheet, opposite the projecting triangular portion have a rectangular shape whose angle is truncated, defining a triangle of dimension approximately equal to half of the opening tongue.
• the package comprises a main sheet having a rectangular central portion, four side portions, one of which is extended by the substantially projecting triangular portion, four truncated rectangular corner portions, the sheet being folded to form a parallelepiped package rectangle.
• the main sheet of the package may be of plastic material, for example polypropylene.
• FIG. 1a shows a view of a plastic sheet in a step at the beginning of the packaging manufacturing process, according to one embodiment of the invention
• Figure 1b shows several plastic sheets on the same film before cutting
• FIG. 2 represents a schematic view of a first step of the method of manufacturing the package according to one embodiment of the invention
• Figure 3 shows the shell obtained after this first step
• FIG. 4 represents a schematic view of a second step of the method of manufacturing the package according to one embodiment of the invention
• FIG. 5 represents a schematic view of a third step of the method of manufacturing the package according to one embodiment of the invention
• Figure 6 shows a schematic view of a fourth step of the method of manufacturing the package according to one embodiment of the invention
• Figure 7 shows a schematic view of a fifth step of the method of manufacturing the package according to one embodiment of the invention
• Figure 8 shows a schematic view of a sixth step of the method of manufacturing the package according to one embodiment of the invention
• Figure 9 shows a schematic view of the end of the packaging manufacturing method according to one embodiment of the invention
• Figure 10 shows a view of the finished package.
• the embodiment shown represents an application in the field of food packaging, for the packaging of a cheese in a rectangular parallelepiped shaped packaging.
• the method of manufacturing the package is based on a plastic sheet 1, for example polypropylene, illustrated in Figure 1a, one side, which corresponds to the inner surface of the manufactured package is coated with a heat sealable material.
• This sheet comprises a central zone 2, four lateral bands 3, one of which is extended by a projecting triangular tip 4 which is intended to form a tongue to facilitate the opening of the package.
• the sheet 1 finally comprises four angular zones or ears 5 which will be folded along a fold line 6.
• Two tear strips 7 extend from the triangular point 4 to the opposite lateral strip, along the edges of the central portion 2.
• the sheets 1 are cut from a rectangular film 8 illustrated in FIG. 1b.
• the oblique edge 4a going from the point A to the point B of the sheet 1, drawing the contour of an angle 5 and the tip 4 of the sheet 1, also defines this sheet 1 with respect to another sheet placed in staggered rows on the film 8.
• this edge 4a has a symmetrical shape around from its central point O;
• the point B is at the end of the tip of a sheet 1 and the point A at the end of the tip of the sheet placed in a quincunx and the two sheets have exactly the same shape.
• the triangular element 9 is transported, turned over and glued to the projecting tip 4 of the sheet 1, this step can be implemented using a device which will be described later, of so as to bring into contact the two heat-sealable material-coated surfaces of the two triangular elements 4 and 9 and to obtain their soldering after heating.
• a resistant opening tongue 10 is thus obtained by the union of the two elements 4 and 9.
• the triangular element 9, obtained by truncating the angular portions 5 of the sheets 1 opposite to the projecting point 4, is provided with a dimension corresponding to that of the projecting tip 4 of the sheet 1.
• the tearing primers 11 are also provided at this opening tab 10. The preparation of the sheet 1 thus formed does not generate any plastic material drop.
• the sheet 1 is lowered through a not shown training corridor, which progressively folds the ears 5 along their fold line 6 with parts in a helix from the training corridor. The latter further causes the folding of the side portions 3.
• the folded sheet 1 is placed in a bucket 12 by a punch 13.
• the sheet 1 is also heated. The heat makes it possible to obtain a definitive folding of the plastic material of the sheet 1, by modifying its memory, to form a shell 15 illustrated in FIG. 3 in the cup 12.
• the bottom 14 of this cup is movable by a piston system and is fixed so as to form a bucket 12 of depth equal to the width of the flaps 3 of the sheet 1.
• the second step, illustrated in FIG. 4, corresponds to the filling of the shell 15 with a food substance 11, cheese, for example. This substance does not fill the whole height of the shell.
• the third step consists in laying a cover 16 of plastic surface corresponding to that of the central zone 2 of the sheet 1, which forms the base of the shell 15.
• a fourth step illustrated in FIG. 6 the bottom 14 of the bucket 12 is raised so that the part 17 of the four lateral walls 3 of the shell situated above the cover 16 protrudes from the upper surface of the bucket 12. the folding of two of these parts 17 placed on opposite sides, which forms flaps 17, with two clamps 18 on each side and a counter piece 19 placed on the lid 16 so as not to crush the contents 11 of the packaging in manufacture.
• the four corners of the flaps 17 are folded, heated and pressed in order to remain in place by this hot gluing.
• FIG. 7 illustrates a fifth step by which a hot beater 21 will fold down the last two opposite lateral surfaces 17 by pressing them against a counterpart 20 disposed on the lid 16. At the end of this step, the four flaps 17 of the four lateral sides 3 are folded over the cover 16. This step can be repeated a second times to ensure success and prevent one or more flaps from unfolding.
• Figure 8 illustrates a last step by which a hot press 22 squeezes the entire upper surface of the package to weld the entire surface of the flaps 17 on the cover 16 and ensure the tightness of the package.
• the bottom 14 of the bucket 12 is lowered so that the package is fully depressed in the bucket 12 so that the press 22 remains retained by the upper lateral surface of the bucket 12 and can penetrate only a few millimeters, avoiding the crushing of the packaging.
• Only the tongue 10 of the triangular tip of one of the flaps 17 is not glued to the cover 16 because it does not include a heat-sealable coating on its surface. It can thus be easily manually grasped and serves as the opening tab of the package.
• the completed package 24, shown in FIG. 10 is taken out of the bucket 12 by the piston 14 of the bottom of the bucket which raises it completely out of the bucket, so that it is guided by means of transport 23 and stored with the other finished products.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Packages (AREA)
• Containers And Plastic Fillers For Packaging (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=34953014

Family Applications (1)

Country Status (3)

Cited By (2)

Families Citing this family (1)

Family Cites Families (5)

• 2005
  • 2005-01-14 FR FR0500383A patent/FR2880836B1/fr not_active Expired - Fee Related
• 2006
  • 2006-01-12 WO PCT/IB2006/000043 patent/WO2006075234A1/fr active Application Filing
  • 2006-01-12 EP EP06701142.9A patent/EP1836110B1/de active Active

Non-Patent Citations (1)

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