In an automated machine that forms a vertically positioned and horizontally traversing web of plastic film into bags and fills the bags with material, after the bags are filled, a pair of gripping fingers clampingly grip and pull the bag upper longitudinal edge portions into a sealing gap between a pair of heat seal bars whereat the bag walls are heat fused together and the bag is sealed closed. A pair of clamp bars below the heat seal bars clampingly engage the bag walls after they are pulled into the gap and prior to heat sealing. The filled bags are linked along their longitudinal edge portions with perforations therebetween. The bags are severed from one another at a perforation when the gripping fingers pull the bag walls into the gap. The gripping fingers are carried on and are moved longitudinally with a pair of belts located vertically above the gap.

A tube seal apparatus including a sealing iron having a tube sealing end, an insulating shroud having a tube clamping end, wherein the sealing iron is at least partially disposed within the insulating shroud. The apparatus further includes an anvil having a cutting detail and a non-stick membrane disposed between the anvil and the tube clamping end of the insulating shroud. The sealing iron and insulating shroud are configured to advance towards a tube to be sealed positioned between the non-stick membrane and the anvil. The tube clamping end is configured to clamp the tube through the non-stick membrane. The sealing iron is configured to advance towards the tube to melt and seal the tube against the cutting detail through the non-stick membrane.

Weld seam, method and device for connecting plastic films (10) by thermal joining, wherein the plastic films (10) are connected between welding jaws (2, 4) along a weld seam (12). According to the invention, the device comprises a pair of unheated welding jaws (2, 4) between which the plastic films (10) are arranged parallel to each other for thermal joining. A device for impulse generation (30) applies an impact impulse to one of the welding jaws (2, 4) with a penetration time into the plastic films (10) of less than 10 ms with a first intensity (Fi1). The impact impulse acts on the plastic films (10), wherein a heating in the material caused by deformation is produced and the weld seam (12) is formed in an effective area of the welding jaws (2, 4); use of a blow-forging press.

A welding device for the sealing welding of thermopolastic hoses (184), includes a clamping device (12) with at least two clamping jaws (122, 124), of which at least one is movable and between which a hose (184) which is to be welded can be clamped, wherein the clamping device (12) has a heating devices (38; 40; 64) which is coupled to a control unit (30) and is configured to heat the hose clamped between the clamping jaws (122, 124). The invention is distinguished in that the at least one movable clamping jaw (122) is actuable with a controllable, bidirectional actuator (32, 34; 42-52; 54, 56, 58) which is coupled to the control unit (30) in such a manner that the clamping pressure acting on the hose (184) can be adjusted independently of the heating device.

A structural element for use as a core layer in a sandwich composite element, wherein the structural element (2) is formed from a plurality of mutually welded body segments (4, 5) made from an extrusion foamed thermoplastic, and wherein the structural element (2) has a first face side (1) for bonding to a cover layer, wherein a surface of the first face side (1) that can be loaded with a resin (8) has open pores (6), wherein the surface of the first face side (1) is created by hot-element cutting, in such a manner that the surface is thermally sealed to some extent, wherein a gloss value of the surface of the first face side (1), measured at 60 in accordance with DIN 67530-1982 is between 2 and 10 gloss units.

System, apparatus and method for opening a heat-bonded connection formed between two hollow, flexible thermoplastic conduits. A pressure difference is created between the inside of at least one of the conduits and the ambient atmosphere sufficient to cause expansion of a wall of the tubing conduit in the vicinity of a frangible portion at least partially blocking the connection to disrupt the frangible portion and reduce the blocking.

A welding device for making and hermetically sealing at least one package containing a product, comprises first and second sealing and cutting equipment. Each sealing equipment is configured to receive a film forming a tubular envelope, to seal and cut it transversally for making at least one package. The welding device comprises a support body, bearing the first and the second sealing and cutting equipment, which is connectable to a packaging machine preferably a rotary drum of a packaging machine. Each sealing and cutting equipment comprises an arm operating as a sealing and cutting head and an abutment body. The arm is rotatably constrained to the support body and reversibly movable between an active position substantially abutting the abutment body, and an inactive position raised with respect to the abutment body. A locking device locks the arms in the active position in the welding step.

Systems and methods for handheld tubing welders are herein disclosed. In an embodiment, a handheld tubing welder can include a housing configured to be held by a user and a tubing retainer coupled to the housing. The tubing retainer can include a first and second retainer slot configured to receive and retain a first section of a first tubing and a second tubing, respectively. A tubing shifter can be positioned adjacent to the housing and the tubing retainer, the tubing shifter includes a first shifter slot and a second shifter slot that is configured to receive and retain a second section of the first tubing and a second section of the second tubing, respectively. A cutting element can be configured to be movable between the tubing shifter and the tubing retainer to cut the first and second tubing extending between the tubing shifter and tubing retainer. A heating element can be configured to heat the cutting element to a temperature range that allows the first section of the second tubing to thermally weld to the second section of the first tubing.