A sealing device generally includes a rotatable support cylinder having an outer, circumferential surface and a heating element disposed about such surface and secured thereto such that the heating element rotates therewith. The heating element is coiled about the outer surface of the cylinder in the form of an overlapping helical pattern. Juxtaposed film plies may be sealed together by bringing the sealing device into rotational contact with the juxtaposed film plies and heating the heating element to a temperature sufficient to cause the film plies to seal together.

There is provided a pressure maintaining and alignment device, comprising a box body that is open at its front side to form an outer opening having a certain depth; a cover assembly for opening and closing outer opening; a pushing assembly disposed on a rear side of box body for selectively clamping a product to be pressure-maintained; and a pressing assembly located at a rear side of the pushing assembly; wherein pressing assembly comprises a pushing rod and a pressing plate, at least one pressing arm extending to above the box body is provided at top of pressing plate, an alignment adjusting assembly is provided between pressing arm and box body, and pressing plate selectively pushes alignment adjusting assembly by the pressing arm under driving of pushing rod, so that the product to be pressure-maintained in the box body is selectively pressed, pressure-maintained and aligned.

A method and apparatus for making bags from a film that follows a film path through a bag machine includes an input section located on the film path, a sealing section located on the film path down stream of the input section, an output section located on the film path downstream of the sealing section, and a controller, connected to control the sealing section. The sealing section includes a sealer that includes a heater block and a manifold. There is an air flow path from the heater block to the manifold. Air is heated in the heater block in response to a control signal provided by the controller to the heater block. The heated air is provided through the air path to the manifold. A temperature sensor is disposed in at least one of the air path and the manifold.

A clamping apparatus for clamping shaped parts which may be welded along a welding contour by irradiation with a laser beam, includes a first clamping plate used as a holder for a first shaped part, a second clamping plate which is designed to apply a clamping force to the first shaped part and a second shaped part arranged thereon, an outer clamping jaw including a recess and an inner clamping jaw arranged in the recess, which together form the second clamping plate, a passage gap for a laser beam formed in sections between the outer clamping jaw and the inner clamping jaw, and one or more fastening elements which connect the outer clamping jaw with the inner clamping jaw in sections and which bridge the passage gap. The clamping apparatus includes a mirror element arranged such that a laser beam is reflected onto a section of the welding contour.

A sealing device generally includes a rotatable support cylinder having an outer, circumferential surface and a heating element disposed about such surface and secured thereto such that the heating element rotates therewith. The heating element is coiled about the outer surface of the cylinder in the form of an overlapping helical pattern. Juxtaposed film plies may be sealed together by bringing the sealing device into rotational contact with the juxtaposed film plies and heating the heating element to a temperature sufficient to cause the film plies to seal together.

An inductor coil for induction welding of a packaging material having at least one layer of metal foil is disclosed. The inductor coil can be configured to induce an alternating current in the at least one layer of metal foil for inductive heating of the packaging material. In some embodiments, the inductor coil comprises a base layer material and a top layer material bonded to the base layer material to form an irreversible bonding interface comprising a mixture of the base layer material and the top layer material. An induction sealing device comprising at least one inductor coil and a method of manufacturing an inductor coil for induction welding of a packaging material is also disclosed.

A device for thermally welding workpieces including a heating element and a shielding gas supply is provided. The device includes a heating plate consisting of a thermal insulating material in which a groove is formed, said groove includes a heating element, relative to which a surface of a workpiece to be welded is positioned in close proximity to the heating element. A feed channel for a shielding gas is formed in the heating plate and communicates with the groove via at least one through-channel, and the feed channel for supplying shielding gas can be connected to a shielding gas source via a feed line and a valve. The device may further include an assembly for welding a first and a second workpiece, said assembly includes a first and second movement device for moving the workpieces towards one another.

A plastic welder comprising a control unit comprising a bulkhead assembly, a torch assembly comprising a torch hybrid connector, and a hybrid cable hose assembly comprising a hybrid cable hose including a threaded portion, a first overmolded portion, a second overmolded portion, wherein the torch assembly is removably attachable to the bulkhead assembly of the control unit by the hybrid cable hose assembly.

An automatic bonding apparatus and a method for thermally induced seam bonding of weldable and/or gluable flat flexible material layers with each other which are each configured as a material web, material band and/or material piece and arranged so that they overlap at least partially wherein the bonding is performed by an electrically controlled contact heating arrangement through a heating wedge welding method. A temperature and/or a power of the heating wedge which is formed by a thin folded steel sheet blank is controlled as a function of a relative velocity between the material layers and the automatic bonding apparatus. This is performed so that a thermal energy that is transferred from the heating wedge to the material layers to be glued is kept constant. For this purpose the relative velocity is detected and the power of the heating wedge is automatically adjusted when the relative velocity changes.

A spring package for a vibration welding device includes a first longitudinal bar for a fixed connection to a frame of the vibration welding device and a second longitudinal bar parallel to and movable with respect to the first longitudinal bar as well as for connection to a tool. A first axis of the spring package extends halfway between and parallel to the longitudinal axis of the first and second longitudinal bar. A plurality of leaf springs are further provided, each connected with a first end to the first longitudinal bar and with a second end to the second longitudinal bar, wherein a second axis of the spring package extends perpendicular to the first axis as well as, in an inactive state of the spring package, parallel to the plurality of leaf springs so that a spring center line extends, in an inactive state of the spring package, parallel to the second axis in the middle of the leaf spring. Each of the plurality of leaf springs includes a first portion adjacent to the first and/or second longitudinal bar, the first portion consisting of at least one radius so that the first portion is formed concave with respect to the spring center line. The first portion transitions continuously into a second portion which is formed convex with respect to the spring center line, and the second portion transitions continuously into a center portion adjacently arranged relative to the first axis so that a thickness of the respective leaf spring is at the lowest in the center portion, especially at the first axis.