A welding head comprises a welding element for welding a lid to an opening device of a container, a supporting body for supporting the welding element and a compensating device for compensating a possible mutual mispositioning of the welding element and the lid during welding of the lid to the opening device, the compensating device being interposed between the supporting body and the welding element, the compensating device comprising a planar spring arrangement provided with at least one planar spring element having a first member and a second member mutually connected by deformable elements.

A tensioning device for a chain driven jaw system in a package filling machine is disclosed. The chain driven jaw system has a fixed cam and a chain as a follower. The tensioning device comprises a chain tensioning element shaped and angled so to receive the chain on an outer surface thereof configured to be directed away from a center of the chain driven jaw system, wherein the chain tensioning element comprises a pivot connection, and wherein the chain tensioning element is configured to be integrated with the fixed cam at the pivot connection such that the chain tensioning element abuts the fixed cam at the pivot connection and can move to tension the chain. A chain driven jaw system and a related method is also disclosed.

An apparatus for forming a seal (40-44) along an edge portion of a flexible package (10) that is made from a sheet of flexible material (137) includes an elongated film folding member (102) and at least one heating and/or sealing member (104), the at least one heating and/or sealing member (104) extending along a first heat/seal axis parallel to a lengthwise axis (108) of the film folding member (102). A first engagement end (112) of the film folding member is adapted to contact a portion of the sheet of flexible material (137) during a sealing process and the at least one heating and/or sealing member (104) is adapted to heat the portion of the sheet of flexible material (137) during the sealing process such that the contact between the first engagement end (112) and the portion of the sheet of flexible material creates the seal along the edge portion of the flexible package (10).

A method for separating fibers using a container, a vacuum pump which is connected to the container volume via a vacuum valve, and a ventilation line with a cross-sectional opening and a valve. The valve can be switched between a closed and open state in a time domain of 19-41 ms and from the open state into the closed state in a time domain of 20 to 45 ms. The method has the steps of filling the container with water and fiber composite, closing the container, mixing the water and the fiber composite using mechanical energy, by stirring, generating kinetic energy in the fiber composite by lowering the container internal pressure to a value between 700 to 950 hPa, and equalizing the pressure in the container to generate cavitation in the fiber composite. The pressure equalization taking place within at least onetime domain of 0.001-1 s.

An anvil is provided in an ultrasonic sealing machine, in which vibration applying surfaces of a pair of horns and an abutment surface on an end face of the anvil cooperate with each other to bond a laminate. The abutment surface includes left and right welding surfaces which are disposed in the extending direction of the vibration applying surface and protrude toward the horns to face two vibration applying surfaces. The left and right welding surfaces each have an area per unit length in the extending direction, which continuously or step-wisely increases with an increase in distance from a center of the seal area, which is a region where the two vibration applying surfaces are adjacent to each other.

An anvil for transversally sealing a tube having a longitudinal seam portion can include a first elongate contact surface and a second elongate contact surface. In some embodiments, the first elongate contact surface includes a first groove and the second elongate contact surface includes a second groove, each one of the first groove and the second groove being adapted to receive, in use, a respective section of the longitudinal seam portion of the tube. The first elongate contact surface can include a first seam interaction portion positioned within the first groove and having a first surface profile. The second elongate contact surface can include a second seam interaction portion positioned within the second groove and having a second surface profile. In some embodiments, the first surface profile differs from the second surface profile.

A cellulose fiber dispersion polyethylene resin composite material formed by dispersing a cellulose fiber into a polyethylene resin, in which a proportion of the above-described cellulose fiber is 1 part by mass or more and 70 parts by mass or less in a total content of 100 parts by mass of the polyethylene resin and the cellulose fiber, and the polyethylene resin satisfies a relationship: 1.7>half-width (Log(MH/ML))>1.0 in a molecular weight pattern obtained by gel permeation chromatography measurement, and a formed body and a pellet using the same, a production method therefor, and a recycling method for the cellulose fiber adhesion polyethylene thin film piece.

There is described a unit (1, 1, 1) for forming/advancing at least one pack (3) or at least one portion of a pack (3), comprising a frame (11, 12a, 12b), a selectively activatable/deactivatable source of power (42) and at least one carriage (14a, 14b) operationally coupled with source of power (42), movable along a path (13a, 13b) comprising at least one vertical portion (18a, 18b, 19a, 19b), and adapted to convey said at least one pack (3) or said at least one portion of a pack (3); unit (1, 1, 1) comprises stopping means (45) fitted to frame (12a, 12b) and which can be operated: to leave carriage (14a, 14b) free to advance along vertical portion (18a, 18b; 19a, 19b), when source of power (42) is activated, and to stop carriage (14a, 14b) along vertical portion (18a, 18b; 19a, 19b), when source of power is, in use, deactivated.

An induction sealing device for heat sealing packaging material for producing sealed packages of pourable food products, said sealing device comprising: an inductor configured to induce a current in the packaging material, the inductor comprising conductor elements; a polymer insert holding said conductor elements; and a supporting body holding said polymer insert; wherein the polymer insert comprises a polymer matrix into which boron nitride particles are dispersed.

A method and a device for heat sealing multiple plies of a laminate from which gable top packaging can be produced, wherein the laminate has a carrier layer made of electrically non-conductive material and a sealing layer made of thermoplastic material on at least one surface of the laminate. To heat seal multiple plies of a laminate in a high-frequency alternating electric field, the alternating electric field is generated by a first lead of an HF voltage supply in a first sub-region of the sealing region and is generated by a second lead of the HF voltage supply, differing from the first lead, in at least a second sub-region of the sealing region, so that a different heat distribution is obtained over the sub-regions of the sealing region.