Stora Enso Oyj

Risto Vesanto

Päivi Määttä

Jari Hovikorpi

Panu Tanninen

Petri Laakso

Kaj Backfolk

Tapani Penttinen

Nina Miikki

Noora Nylander

Pentti Järvelä

Heli Vesanto

Ari Lehikoinen

Mika Aunola

Ville Laalo

Paivi Maeaettae

Raimo Penttilä

Pëtri Laakso

Bo Sundqvist

Ritva Turunen

Martti Turunen

Tapio Hietaranta

Marjo Elorae

Paeivi Maeaettae

Raimo Penttilae

Päivi MÄÄTTÄ

Jussi Oksala

Ari Nenonen

Kimmo Väliviita

Anssi Rautio

The invention relates to a method for sealing a fiber-based material () 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 () through the fiber layer () of the material to a radiation-absorbing pigment disposed in the sealing area (), with the absorption heat melting the polymer () 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. carbon black, may be admixed in the plastic coating of the board or paper or the plastic film formed on the counter-surface, or the pigment may be located on the surface of the material to be sealed or its fiber layer, or on the counter-surface to which the material is sealed, e.g. as a component of printing ink applied to the counter-surface.

Method for sealing a fiber-based material

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

Method for protecting the untrimmed edge of a paperboard or paper

The invention relates to a method of providing board containers (V) with prints and a printing machine that applies the method. According to the invention, the printing machine comprises a turret head (), with uniformly spaced radial arms () diverging from its rotational axis, each arm ending in a mandrel () that carries a container (); and stationary stations () that are located on the path of the turret head for gripping a container, printing it by a printhead (), and removing the printed container (V). At the printing station (), the container () is digital-printed by the printhead (), past which the surface of the container is conveyed by means of a rotational motion. The container can be a conical drinking cup (), which is ink-jet printed by the stationary printhead () by rotating the cup by 360&#xb0; by means of the mandrel () that is pushed inside the cup. The cups () can be produced at a plant in mass-scale production runs and divided into smaller lots, which are delivered to customers and which the customers then print according to their own individual needs.

Method and a printing machine for manufacturing printed board containers

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.

Apparatus for sealing a polymer coated paper or board

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.

Method for manufacturing a board tray, a blank for the tray, and a tray obtained by the method

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Imatra, Finland

Risto Vesanto