Abstract: The invention relates to a method for sealing a fiber-based material (1, 4) to a counter-surface to be bonded to it by melting polymer present at the sealing point. In accordance with the invention, the sealing is performed by directing a laser beam (8) through the fiber layer (4) of the material to a radiation-absorbing pigment disposed in the sealing area (9), with the absorption heat melting the polymer (5) and generating the sealing. The method allows sealing of plastic-coated paper or board to itself, to another plastic counter-surface or also to paper or board without any plastic coating. It is also possible to seal uncoated paper or board to paper or board containing plastic, such as plastic-coated paper or board, or to a plastic film. The absorptive pigment, e.g.

Abstract: The disclosure concerns a package (30) comprising a cardboard blank (31), the cardboard blank (31) being shaped as a container with a bottom (31a) and one or more cardboard sidewalls (31b) extending upwardly from the bottom (31a), the package (30) further comprising a molded rim (32) being attached to said one or more cardboard sidewalls (31b), along an interface (I) formed of an upper portion of said one or more cardboard sidewalls (31b) and a lower portion of said molded rim (32), and extending along at least a part of an upper edge of said one or more cardboard sidewalls (31b), characterised in that the rim (32) is extending essentially upright upwardly from said one or more cardboard sidewalls (31b) thereby providing the package (30) with a molded upper sidewall portion. The disclosure also concerns a method and a molding tool.

Abstract: A package for ready-prepared foods which comprises a dish adapted to contain food, said dish containing a rim flange, and a lid, heat-sealed to the rim flange, wherein the rim flange is provided with a plurality of ridges which extend around substantially the entire periphery of the dish defining a space between said ridges, said space being divided into a plurality of transverse ridges which extend across the space forming a plurality of sealing compartments which substantially eliminate sealing leakage.

Abstract: The present invention relates to a method for forming a package by moulding a cardboard blank in such a manner that a margin area (2) of the blank, surrounding a middle portion (1) of the blank, is bent upwards to form side walls of the package while the middle portion forms a bottom of the package. The cardboard blank prior to moulding is provided with at least one area (4) of reduced bending stiffness being located in a transition zone (3) between the side walls and the bottom. The package is moulded from the blank so that the at least one area (4) of reduced bending stiffness is located in the bended areas between the side walls and the bottom and extend in the running direction of the bend. The invention further relates to a package and a package blank that can be used for forming said package.

Abstract: A cardboard cover that seals a package and that also enables the resealing of the package. The lower surface of the cover (2) is provided with a downwards directed annular profile (3) made of an injection mouldable material, which enables the resealing of the cover and is placed inside the package when the package is sealed. The invention also relates to a package which is sealed by using the above-described cardboard cover that enables resealing. The invention also relates to a method for manufacturing a card-board cover and a method for sealing a package.

Abstract: Mold system (1) for manufacturing cardboard-based container, comprising movable mold half (10) and stationary mold half (20) located opposite one another. Movable mold half (10), movable with respect to stationary mold half (20), includes at least a core plate (4), a plate-like seal ring (5) movable with respect to the core, and collar ring (6). Stationary mold half (40) includes at least a mold plate (7) provided with a mold cavity (71) and a seal surface (7a). In the mold system (1), an insert (720) can be supported on and detachably attached to the base (71b) of the mold cavity (71) reducing the depth H of the mold cavity by its height h. Container (500) comprises bottom (57) pressed from cardboard blank and wall (59) connected to the bottom and plastic rim (50) connected to the upper edge of the walls.

Abstract: The disclosure concerns a package (30) comprising a cardboard blank (31), the cardboard blank (31) being shaped as a container with a bottom (31a) and one or more cardboard sidewalls (31b) extending upwardly from the bottom (31a), the package (30) further comprising a moulded rim (32) being attached to said one or more cardboard sidewalls (31b), along an interface (I) formed of an upper portion of said one or more cardboard sidewalls (31b) and a lower portion of said moulded rim (32), and extending along at least a part of an upper edge of said one or more cardboard sidewalls (31b), characterised in that the rim (32) is extending essentially upright upwardly from said one or more cardboard sidewalls (31b) thereby providing the package (30) with a moulded upper sidewall portion. The disclosure also concerns a method and a moulding tool.

Abstract: A mould system for manufacturing a container which includes a movable mould half and a stationary mould half which are positioned opposite to each other, wherein the movable mould half includes a core plate provided with a core, a plate-like seal ring that is movable relative to the core, a seal surface which surrounds the core, and a collar ring that is movable relative to the core and the stationary mould half includes a mould plate provided with a mould cavity and a seal surface, wherein in the mould system, a plate-like insert is connected to the seal surface of the seal ring, the insert including a recess which is in contact with a front edge of the seal surface, so that it is in flow communication with molten plastic material flowing from the direction of the collar ring.

Abstract: A mould system for manufacturing a container which includes a movable mould half and a stationary mould half which are positioned opposite to each other, wherein the movable mould half includes a core plate provided with a core, a plate-like seal ring that is movable relative to the core, a seal surface which surrounds the core, and a collar ring that is movable relative to the core and the stationary mould half includes a mould plate provided with a mould cavity and a seal surface, wherein in the mould system, a plate-like insert is connected to the seal surface of the seal ring, the insert including a recess which is in contact with a front edge of the seal surface, so that it is in flow communication with molten plastic material flowing from the direction of the collar ring.

Abstract: The present invention relates to a method for forming a package by moulding a cardboard blank in such a manner that a margin area (2) of the blank, surrounding a middle portion (1) of the blank, is bent upwards to form side walls of the package while the middle portion forms a bottom of the package. The cardboard blank prior to moulding is provided with at least one area (4) of reduced bending stiffness being located in a transition zone (3) between the side walls and the bottom. The package is moulded from the blank so that the at least one area (4) of reduced bending stiffness is located in the bended areas between the side walls and the bottom and extend in the running direction of the bend. The invention further relates to a package and a package blank that can be used for forming said package.

Abstract: The invention relates to a method for protecting the untrimmed edge of paperboard or paper (1), in which method the untrimmed edge (4) of two adjacent paperboards or papers are protected and attached abuttingly together by sealing a separate profile (3) on both sides of the abutment of the edges (4) by means of ultrasound.

Abstract: The invention relates to a method and an apparatus for jointing members made of plastic-coated paper or board. In accordance with the invention, the sealable members are retained in position with clamps and sealing is performed with a laser sealing means moving along the sealing line, a means for opening the seal point pressing the members apart to continue keeping the seal point open, a laser beam being directed to the open seal point for melting the coating plastic and a means for closing the seal pressing finally the members against each other, the plastic jointing the members when solidified. The method is applicable to lateral sealing of bag or container packages formed of blanks, among other things.

Abstract: A board tray, a method for manufacturing a board tray and a tray blank from which the board tray is manufactured, said board tray containing side walls and a bottom wall made of a board layer provided on at least one surface thereof with a plastic coating, wherein areas of reduced thickness are formed in the board layer whereby portions of the plastic layer which have been melted and are disposed adjacent to areas of reduced thickness are compressed into such areas forming double-folded linear plastic compressions which seal on themselves.

Abstract: The invention relates to a mould system (1) for manufacturing a container (500) and comprising a movable mould half (10) and a stationary mould half (20), which mould halves (10 and 20) are located opposite to each other; the mould system (1) can be used to manufacture the container (500), which comprises a bottom (57) pressed from a cardboard blank, walls (59) connected to the said bottom (57) and a rim (50) that is at least partly cast of plastic and connected to the upper edge of the walls (59), encircling the walls, whereby the mould half (10) that is movable with respect to the stationary mould half (20) includes at least a core plate (4) provided with a core (41), a plate-like seal ring (5) that is movable with respect to the core (41) and comprises a seal surface (5a) and surrounds the core (41), and a collar ring (6) that is movable with respect to the core (41) and the seal ring (5) and can be fitted between the same; and the stationary mould half (20) includes at least a mould plate (7) provided wit

Abstract: The invention relates to a mould system (1) for making a partition in a cardboard-based container, whereby the mould system includes a moving mould half (10) and a stationary mould half (20), which are located opposite to each other, the mould system (1) enabling the manufacture of a container (500) that comprises a bottom (57) that is pressed from a cardboard blank and walls (59) connected to the bottom, and a rim (50) that is at least partly cast of plastic and connected to the upper edge of the walls, encircling the walls, whereby the mould half (10) that is movable with respect to the stationary mould half (20) includes at least a core plate (4) that is provided with a core (41), a plate-like seal ring (5), which is movable with respect to the core (41) and comprises a seal surface (5a) and surrounds the core (41), and a collar ring (6), which can be fitted between the core (41) and the seal ring (5) and by which the rim (50) can be made on the container and which can be moved with respect to both the sea

Abstract: The invention relates to a mould system (1) for manufacturing a cardboard-based container, comprising a movable mould half (10) and a stationary mould half (20), which are located opposite to each other, the mould system (1) enabling the manufacture of a container (500) that comprises a bottom (57) pressed from a cardboard blank and walls (59) connected to the bottom, and a rim (50) that is at least partly cast of plastic and connected to the upper edge of the walls, encircling the walls, whereby the mould half (10) that is movable with respect to the stationary mould half (20) includes at least a core plate (4) provided with a core (41), a plate-like seal ring (5), which is movable with respect to the core (41) and comprises a seal surface (5a) and surrounds the core (41), and a collar ring (6), which can be adapted between the core (41) and the seal ring (5) and by which the rim (50) can be made on the container and which can be moved with respect to both the seal ring (5) and the core (41); and the station

Abstract: In a method for forming a package, a package with the shape of a container is formed of a cardboard blank (A), the package having a bottom and side walls (7) extending upwards from the bottom. At the end stage of compression moulding, a rim (8) of moulding material extending sideways is moulded to the upper part of the side walls (7) when the mould is kept closed in such a way that a mould cavity (5) corresponding to the rim is formed by moving a counter surface inside the mould backwards from a surface opposite to it, after which the moulding material is introduced into the mould cavity (5).

Abstract: A cardboard cover that seals a package and that also enables the resealing of the package. The lower surface of the cover (2) is provided with a downwards directed annular profile (3) made of an injection mouldable material, which enables the resealing of the cover and is placed inside the package when the package is sealed. The invention also relates to a package which is sealed by using the above-described cardboard cover that enables resealing. The invention also relates to a method for manufacturing a card-board cover and a method for sealing a package.

Abstract: The invention relates to a method for protecting the untrimmed edge of paperboard or paper (1), in which method the untrimmed edge (4) of two adjacent paperboards or papers are protected and attached abuttingly together by sealing a separate profile (3) on both sides of the abutment of the edges (4) by means of ultrasound.

Abstract: The invention relates to a method for manufacturing a board tray (7), to a tray blank feasible for the method, and to a tray obtained by the method. The method comprises moulding a blank of plastic-coated board into the tray (7) comprising a bottom (3), side walls (4), as well as a rim flange (5), the blank being compressed in a direction transverse to the tray's side walls and rim flange. According to the invention, the blank is made thinner on its side opposite to the plastic coating such that, during the moulding process, the plastic coating double-folds at the compressed parts and stabilizes compressions (8) by becoming sealed to itself. Making the blank thinner is most conveniently effected by carving the board layer with a laser beam for having the fiber material predominantly or completely removed from where the cuts are located. As a result of the moulding process, the tray's rim flange (5) develops a smooth plastic surface which enables closing the tray hermetically with a heat-sealed cover.