A plastic welding machine for welding plastic parts together is capable of controlling the weld force vector in both magnitude and direction.

There is provided an apparatus 1 that includes a pair of molds 10a and 10b that press together, heat, and weld an overlapping part of a plurality of film-like members, a pair of heater blocks 20a and 20b that respectively support the pair of molds; a plurality of first support blocks 37 that are connected via a plurality of rod-like members 50, which midway include parts that restrict transmission of heat, to one heater block 20a; a plurality of second support blocks 38 that are connected via the plurality of rod-like members to the other heater block 20b; and a driving mechanism 60 that changes, via the support blocks, a gap between the pair of molds to press together the film-like members. The plurality of first support blocks include at least one movable support block 39 including a mechanism 35 that moves in a first direction relative to the driving mechanism corresponding to thermal deformation in the first direction of the heater block to be supported, and the plurality of second support blocks include at least one movable support block 39.

A plastic welding machine for welding plastic parts together is capable of controlling the weld force vector in both magnitude and direction.

Aspects of the present invention are directed to a heat sealed packaging wherein the heat seal is along a curved surface. Additional aspects of the present invention are directed to a device for heat sealing a package on a surface that is curved along the direction of force.

Aspects of the present invention are directed to a heat sealed packaging wherein the heat seal is along a curved surface. Additional aspects of the present invention are directed to a device for heat sealing a package on a surface that is curved along the direction of force.

A unit for forming absorbent sanitary articles including a drum rotatable about its axis of rotation and having a circumferential peripheral surface movable along a feed direction, first feeding means for feeding a succession of pairs of panels of material facing the circumferential peripheral surface and configured to position each pair in such a way that the respective two panels are facing each other and transversely aligned with the feed direction and second feeding means for feeding a continuous web of material suitable for defining at least part of the main body of an absorbent sanitary article, and configured to position the web on the circumferential peripheral surface of the drum in such a way that each panel projects partly sideways from the web. The unit comprises an ultrasonic sealing station located along the circumferential peripheral surface of the drum, in a zone located operatively downstream of the second feeding means, and configured to attach each panel of the pair to the web at at least one plurality of sealing points arranged in succession along the feed direction.

A process and apparatus (1) for packaging a product (P) arranged on a tray (4) is disclosed. The apparatus comprises a packaging assembly (8) configured for tightly fixing one or more film sheets to one or more trays. The packaging assembly includes a lower tool (22) defining a prefixed number of seats (23) for receiving the trays and an upper tool (21) facing the lower tool and cooperating with the upper tool to define a packaging chamber (24). The packaging assembly (8) is configured to operate at least in a first operating condition, where said packaging chamber (24) is open, and in a second operating condition, where said packaging chamber (24) is hermetically closed. First injection apertures (90) are positioned in corner regions of the seat and are configured to inject streams of gas in a direction substantially parallel to and above the flange (4c) of a tray (4) positioned in said seat. The process includes the step of activating injection of a plurality of streams of gas through said first apertures (90) in order to form a controlled atmosphere inside the tray before closing the tray with the film.

The invention relates to a transverse-sealing unit (09) for producing transverse-sealing seams in a tubular-bag machine (01), the transverse-sealing unit (09) comprising at least one sealing bar (11) which comes into sealing contact with at least one effective area when transversely sealing the film tube (05), and the transverse-sealing unit (09) comprising a support element (12) in which the sealing bar (11) is fastened, and the sealing bar having at least two effective-area sections (13, 14, 15), and the first effective-area section (15) protruding slightly over the second effective-area section (13, 14). The sealing bar (11) is mounted so as to be displaceable on the support element (12) in the direction of its longitudinal axis.

A welding head comprises a welding element (51) for welding a lid (1) to an opening device of a container (10). The welding head (43) further comprises a 5 compensating device (62) operable for compensating a misalignment between the welding element (51) and the lid (1), thereby centering the welding element (51) relative to the lid (1).

An apparatus for capping a container (10) comprises: a conveying device for conveying the container (10) along a path; an applying head (23) for applying a lid (1) onto a neck (9) included in an opening device of the container (10); a welding head (43) arranged downstream of the applying head (23), the welding head (43) comprising a welding element (51) for welding the lid (1) to the opening device.