The ultrasound welding device, for welding flexible packages is disclosed. The device includes: a power generator to generate a sinusoidal electric signal at a predetermined frequency; a transducer operatively associated with the power generator to transform the electric signal generated by the latter into mechanical vibrations having the same frequency as the electric signal; a sonotrode associated with the transducer and structured to amplify and transmit the mechanical vibrations generated by the transducer to a welding surface defined on the same; and a contrast element provided with a contrast surface arranged to engage the welding surface of the sonotrode during the welding operations. The transducer and sonotrode are engaged so as to amplify and transmit the vibrations generated by the transducer to the welding surface of the sonotrode without an amplifier or similar device.

In the method for producing a tire carcass ply for a vehicle, the ply is wound onto a drum and contains reinforcements running in planes that are radial to an axis of the drum, of which: at least one assembly member (51, 52) mounted such that it can move in relation to the drum brings the ends of the ply together and assembles them by travelling over the ply in a direction (X) parallel to the ends; and prior to assembly, a blade independent of the one or of each assembly member extends between the drum and the ends without extending between the drum and the rest of the ply.

A flexible package having a closure device and a lap or fin seal is provided that reduces or eliminates an air gap present at the fin or lap seal portion of packages. The package can include a film with a closure applied to the film. The flexible package can include a film having a closure device applied to the film transverse to the first and second side edges of the film, with the first side edge portion extending into the fin seal such that at least a portion of the first side edge portion eliminates an air gap between the fin or lap seal and at least one of the first and second side edge portions.

A thin ribbon spirally wound polymer conduit and method of forming, wherein a helical reinforcing bead is interposed adjacent overlapping layers of ribbon. Further, a method of continuously forming spirally wound conduit wherein a sacrificial layer, preferably having a different base polymer to that of the conduit, is first applied to the former before the conduit is formed overtop.

The invention relates to a method for producing tubular bags made from plastic film or from composite film having a plastic layer on the bag content side, having a self-cutting plastic closure attached to the tubular bag, consisting of a spout part having a fastening flange, a cutting body, which is movably guided in the spout part, and a screw cover having means for activating the cutting body. The film material (5) is supplied from a supply roll to a bag manufacturing machine and the plastic closure is sealed onto the film material in a spout region of a tubular bag. According to the invention, the film material (5) is thinned on the inside of the bag in a ring-shaped region, which is intended for cutting by the cutting body, by means of a thermal embossing process. The plastic closure is then positioned and sealed onto the film material such that the cutting organ embedded in the spout part can become effective in the thinned, ring-shaped region upon use thereof.

An inductor for induction welding of a packaging material having at least one layer of metal foil is disclosed. The inductor comprises a welding surface configured to be arranged opposite the packaging material for heating thereof, and at least one spacing element arranged to protrude from the welding surface in a first direction towards the packaging material, when the packaging material is arranged opposite the welding surface, whereupon the least one spacing element separates the packaging material from the welding surface by an off-set distance. A sealing machine for sealing packaging material and a method of welding a packaging material is also disclosed.

A system and method for forming a seam in at least one piece of material used to form an inflatable product utilizes a seam forming member that is attached to an inside wall of a piece of product material that comprises the inflatable product. The inflatable product is comprised of one or more pieces of product material and one or more seam forming members located at any location where a seam is necessary. A first portion of the seam forming member attaches to a first edge of a first piece of product material and a second portion of the seam forming member attaches proximate a second edge of the first piece of product material. The seal forming means can be accomplished by radio frequency, ultrasonic, heat or other types of welding, and adhesive or chemical based bonding.

There is a need for a tension-link for belt-splicer that is lighter and where damage to the link is more easily detected. The solution is a tension-link (30) for a belt-splicer with an engagement length that is based on a rope-loop (45) of high-strength synthetic fiber, wound around bosses, where the bosses and the loop are encapsulated in molded plastic (56). The link connects cross-beams of the splicer. Additional features of the link include couplings which permit rotation (52) when the beams deflect in bending. The links can be stored inside the hollow interior of the beams. The couplings include eccentrically mounted blocks (43) that can be orientated to adjust the length of the link.

A container is formed to include an interior region and a mouth opening into the interior region. The container includes a floor and a side wall coupled to the floor to define the interior region between the floor and the side wall.

A method for manufacturing tubular bodies (1) exhibiting an inner circumferential surface (8) and outer circumferential surface (7) for packaging tubes out of a strip-shaped film substrate (2), which exhibits at least one weldable plastic layer (3) or consists of the latter, and which encompasses a first edge face (5) extending in the longitudinal direction of the film substrate (2) or a second edge face (6) spaced apart from the first edge face (5) by the width of the film substrate (2), wherein the first edge face (5) runs at a first angle (α) relative to a first thickness extension direction on a first radially innermost border (9) of the first edge face (5), and the second edge face (6) runs at a second angle (β) relative to a second thickness extension direction on a second radially outermost border of the second edge face (6), and wherein the first and second edge faces (6) are placed opposite each other and joined together during exposure to heat, wherein the first angle (α) and second angle (β) differ in size, in that the selected first angle (α) is smaller than the second angle (β) by an angular difference of between 3° and 70°, and that the edge faces (5, 6) are situated in such a way that an outwardly open longitudinal gap (11) is delimited by the first and second edge faces (5, 6).