Abstract: Advanced ultrasonic welding components of co-pending application Ser. No. 12/925,652 are readily incorporated into new form-fill-seal machines, but owners of existing machines utilizing heat-seal stations were unsuccessful at swapping the sealing packages. Retrofit kits to a replace heat sealing station with an advanced ultrasonic sonotrode and anvil comprise: a housing; a linear rail fixed thereto; first and second bearing carriages being slidable upon the rail; and first and second fluidic muscles. Each of the fluidic muscles is mounted with a first end fixed to a respective housing wall, and a second end fixed to a respective bearing carriage, permitting actuation of each carriage through pressurization and depressurization of the muscles. The advanced anvil and sonotrode may be secured to respective carriages.

Abstract: The sonotrode and anvil of co-pending application Ser. No. 12/925,652, for advanced ultrasonic welding of work pieces, are readily incorporated into new form-fill-seal machines, but existing machines with heat-seal stations pose difficult problems for swapping of the sealing packages. Kits enabling heat station replacement, with the further improved sonotrode and anvil disclosed herein, comprise: a housing; a linear rail fixed thereto; anvil and sonotrode support members; and a parallel gripper. Each of the anvil and sonotrode support members is slidably attached to the rail(s) and are also connected to a respective piston of the gripper, permitting actuation of each through cycling of the gripper pistons.

Abstract: According to one embodiment, an ultrasonic bonding apparatus includes an ultrasonic transducer, a distal-end tool, an ultrasonic horn and an ultrasonic oscillator. The ultrasonic oscillator includes an oscillation circuit and a control device. The ultrasonic oscillator applies the voltage oscillated by the oscillation circuit to the ultrasonic transducer. The control device is configured to detect a voltage reflection ratio from the voltage and current supplied from the oscillation circuit and to control the frequency of the voltage generated by the oscillation circuit, thereby to minimize the voltage reflection ratio.

Abstract: A sonotrode holder for the oscillatable fastening of a sonotrode at a carrier is provided, wherein a direction of oscillation extends from the carrier to the sonotrode and the sonotrode holder has at least one oscillating body having at least one cut-out and the oscillating body is connected to the sonotrode at one end and has a mount which is configured for fastening at the carrier.

Abstract: An ultrasonic welding system, for welding together two workpieces wherein at least one of the workpieces includes a polymeric composite, comprising an energy applicator positioned along an action axis so that, in operation, ultrasonic vibrations transmitted from the energy applicator during a welding routine, are transmitted to the workpieces generally at and/or adjacent the axis. The system also includes a primary, course-control, actuator positioned along action axis so that a first load, output by the primary actuator, acts along the system action axis. The system further comprises a secondary, fine-control, actuator positioned along the system action axis so that a second load output, by the secondary actuator, acts along the axis. And the system comprises a controller for providing first command signals and second command signals to the primary actuator and second actuator to control them to effect loads on the workpieces, during the welding routine and along the axis.

Abstract: A custom weld-repair tool, for use in repairing a discrepant weld between workpieces, including an extended portion and a cavity adjacent the extended portions. The discrepant weld includes an insufficient primary portion and the tool is configured to, when the extended portion is in contact with a proximate one of the workpieces, channel welding energy, received at or generated at the tool, to the proximate workpiece via the extended portion, to form or enlarge a weld at a periphery of the primary portion or directly adjacent the primary portion.

Abstract: An ultrasonic welding assembly having an ultrasonic horn and an anvil having first, second, and third plate portions is provided. The third plate portion is coupled between the first and second plate portions. The first plate portion has a first knurled region on a first side disposed proximate to the ultrasonic horn, and the second plate portion has a second knurled region on the first side. The third plate portion has a first aperture extending therethrough. The assembly further includes a bracket that receives the second side of the anvil for holding the anvil thereon. The bracket has a second aperture extending therethrough that aligns with the first aperture, such that a coupling member extending through the first and second apertures removably couples the anvil to the bracket.

Abstract: In some cases, it is difficult to carry out ultrasonic joining of high quality with a conventional bonding tool. A bonding tool includes: a horn that transmits an ultrasonic vibration; an ultrasonic vibrator that is provided at one end of the horn, and generates the ultrasonic vibration; and an electronic component holding part that holds an electronic component, wherein the electronic component holding part has a male fitting part in a shape of a tapering-off, and an electronic component holding face that holds the electronic component on an opposite side to the male fitting part, a female fitting part in a shape according to a shape of the male fitting part is formed in a predetermined face of the horn, and the male fitting part is fitted into the female fitting part via an adhesion layer.

Abstract: The present invention relates to an ultrasonic welding device with a generator for generating a high-frequency a.c. voltage, a converter for converting the a.c. voltage into a mechanical ultrasonic vibration and a sonotrode for transmitting the ultrasonic vibration to material to be worked, wherein the converter and the sonotrode are rotatable and a rotary coupler is arranged between the generator and the converter for the transmission of electrical energy from a static arrangement to a rotating arrangement, comprising a stationary element and an element that is rotatable in relation to the stationary element, wherein the stationary element comprises a primary circuit with two input terminals, which are connected to each other by means of a second coil with M turns, wherein the first and second coils are arranged in such a way that, when an a.c. voltage is applied to the input terminals, the magnetic field generated by the first coil induces an a.c. voltage in the second coil.

Abstract: An ultrasonic tool having a sonotrode having a single weld region and two nodal regions formed on either side of the weld region. Two rigid mount boosters are each coupled to either side of the weld region. One transducer is coupled to one of the rigid mount boosters. Two ultrasonic stack mounting rings are each configured to be coupled to a housing assembly at a non-nodal region and coupled to one of the rigid mount boosters at a nodal region.

Abstract: An ultrasonic collet horn for an ultrasonic welder has a body and a collet over which a replaceable horn tip is receivable. The collet has a plurality of axial slits therein that divide the collet into sections and a tapered axially extending bore that tapers outwardly as it extends axially outwardly. The body has a threaded bore that is threadably engageable with a threaded inner section of a collet lock. The sections of the collet are forced outwardly against an inner wall of the horn tip when the horn tip is received on the collet and the collet lock tightened into the threaded bore to secure the horn tip on the collet.

Abstract: A sealing jaw for sealing a packaging material using ultrasound is provided. Said sealing jaw comprises energy directing means (28) which, for sealing purposes, can be brought in contact with an opposite surface (26) via the packaging material and which have a substantially grid-shaped or rhomboidal sealing profile (36).

Abstract: Selected surface regions of coulomb vibration damping strips are bonded face-to-face by ultrasonic welding to a surface region of an article that may experience excessive vibration in use. In one embodiment, prior to welding, the intended facing side of the damping strip is treated to form surface regions that are oxidized, roughened, or coating so that the treated regions do not weld to the article surface. In another embodiment of the invention the ultrasonic welding process is controlled so as to produce regions (sometimes randomly interposed regions) of welded and non-welded regions between the damping strip and adjacent article surface. The unbonded regions of the otherwise welded strip lie in closely-spaced, interfacial, frictional contact with the adjacent article surface to damp vibration in the article.

Abstract: The present invention concerns an ultrasonic oscillating unit comprising a converter and a sonotrode (1) optionally connected to the converter by way of an amplitude transformer (2), wherein the sonotrode (1) has a sealing surface (10) which is substantially in the form of a circular ring or a cylinder surface and the ultrasonic oscillating unit has a holder (3) for fastening the ultrasonic oscillating unit to a machine stand. To achieve that it is proposed according to the invention that the holder (3) is fastened directly to the sonotrode (1).

Abstract: The linear friction welding (LFW) apparatus of this invention, in various embodiments includes a vibrating assembly or assemblies, which simultaneously vibrates both work pieces along the weld axis during the weld process. In one embodiment, separate vibrating assemblies are used to vibrate each work piece along the weld axis relative to each other. Each vibrating assembly has its own oscillator mechanism with motors and cams that can be moved into and out of phase with that of the other vibrating mechanism to generate the relative movement between the work pieces. In another embodiment, the apparatus includes a vibrating assembly that uses a single oscillator and two sets of rocker arms supporting carriages operatively connected by a linkage mechanism to simultaneously vibrate both work pieces along the weld axis.

Abstract: A vibration welding system and method having an operating vibration frequency of 260 Hz or higher. A pressing action between two workpieces is effected by directly controlling, with a control system and a sensor, the relative positions of the workpieces during some or all of the weld cycle, or by controlling the speed between the workpieces during some phase of the weld cycle and controlling the force between the workpieces during other phases. An external control device can be coupled to a control system, to produce an input signal to adjust the speed of relative motion between the workpieces, the force therebetween, or both speed and force based on the input signal.

Abstract: The invention relates to an ultrasonic vibration unit (10) for an ultrasonic welding device for sealing and welding material webs, comprising a sonotrode (12) connected to a converter (14) and having at least one sealing horn (16) radially protruding from an axis of rotation (a) and rotatable about the axis of rotation (a) and having a free end forming a sealing surface (18). The sonotrode (12) comprises a sonotrode shaft (20) having the axis of rotation (a). One or both end faces (22) of the sonotrode shaft (20) are connected to a converter (14) and the sealing horns (16) are attached to the sonotrode shaft (20) directly or by means of boosters (24, 26) when vibrational nodes (KL) of a longitudinal vibration (SWI) of the sonotrode shaft (20) are present.

Abstract: A description is given of a method for joining a first and a second film web (2, 2?) of a transfer film or laminating film, wherein the film webs (2, 2?) comprise a thermoplastic carrier film (21) and a decorative layer (23). Formed between the first and second film webs (2, 2?) is a common joining portion (3), in which the first and second film webs (2, 2?) are joined to each other by a welding process. A device for carrying out the method is also described.

Abstract: A vibration welding system includes vibration welding equipment having a welding horn and anvil, a host device, a check station, and a robot. The robot moves the horn and anvil via an arm to the check station. Sensors, e.g., temperature sensors, are positioned with respect to the welding equipment. Additional sensors are positioned with respect to the check station, including a pressure-sensitive array. The host device, which monitors a condition of the welding equipment, measures signals via the sensors positioned with respect to the welding equipment when the horn is actively forming a weld. The robot moves the horn and anvil to the check station, activates the check station sensors at the check station, and determines a condition of the welding equipment by processing the received signals. Acoustic, force, temperature, displacement, amplitude, and/or attitude/gyroscopic sensors may be used.

Abstract: An ultrasonic collet horn for an ultrasonic welder has a body and a collet over which a replaceable horn tip is receivable. The collet has a plurality of axial slits therein that divide the collet into sections and a tapered axially extending bore that tapers outwardly as it extends axially outwardly. The body has a threaded bore that is threadably engageable with a threaded inner section of a collet lock. The sections of the collet are forced outwardly against an inner wall of the horn tip when the horn tip is received on the collet and the collet lock tightened into the threaded bore to secure the horn tip on the collet.

Abstract: A device and a method is proposed whereupon the device for processing a packing material using ultrasound comprises the following elements: at least one sonotrode (10), at least one anvil (12), whereupon a gap is constructed between sonotrode (10) and anvil (12) through which the packing material can be passed for the purpose of ultrasonically sealing a packing material, at least one adjustment means (50) that adjusts the gap (s) between sonotrode (10) and anvil (12), at least one generator (70) that changes an input voltage into an output voltage, which a converter (74) transforms into mechanical oscillations in order to generate ultrasonic oscillations on the sonotrode (10), whereupon a regulation device and/or control device (78) is arranged to regulate or control the gap (s) between sonotrode (10) and anvil (12) depending on at least one electric variable (P,E,R) that acts on the sonotrode (10).

Abstract: A device includes at least one bearing shield, at least one sonotrode which is rotatably mounted in the bearing shield, at least one anvil which interacts with the sonotrode to process the packing material, at least one other bearing shield to rotatably mount the anvil, whereupon a coupling mechanism is arranged to mechanically couple both bearing shields. The coupling mechanism is configured so that a relative motion between both bearing shields is made possible.

Abstract: A longitudinal continuous welding device for packaging machines includes structural features aimed at enabling it to act continuously on opposite sides of layers of material to be welded, joining and welding them continuously, as they pass through the inside of the welding device, while the device remains static, without the possibility of movement in the direction in which the layers of material to be welded advance.

Abstract: A device for bonding of two wafers on one joining surface V of the wafers. The device includes a pressure transfer means with a pressure surface D for applying a bond pressure to the two wafers on the pressure surface D, wherein the pressure surface D is smaller than the joining surface V. The invention also relates to a method for bonding of two wafers on one joining surface V of the two wafers, by pressure transfer means with a pressure surface D for action on the wafers (2, 3), wherein a bond pressure is applied in succession to partial sections of the joining surface V.

Abstract: An anvil includes a base and projections and. The base is installed at an attachment position on an outer peripheral surface of a rotating drum. The projection protrudes from a front surface of the base in a normal direction H of the rotating drum and is formed in a line shape extending in the cross direction CD along the front surface of the base. On the front surface of the base, one end in the cross direction CD of the projection is provided forward of the other end in a rotation direction R. In the projection, a cut portion is formed to extend in a direction opposite to the protrusion direction of each protrusion. The cut portion extends from the front surface of the projection, protruding from the front surface of the base, to the vicinity of the middle of the projection.

Abstract: An apparatus and a process for automatic, continuous production of preforms from dry fabrics containing a thermoplastic binder element by feeding individual layers (7-9) of dry fabrics towards an ultrasonic unit (13), applying ultrasonic energy from said ultrasonic unit (13) to said more than one layers (7-9) of dry fabrics applying pressure to said more than one layers (7-9) of dry fabrics containing a thermoplastic binder element while the binder element is activated by means of said ultrasonic energy in said ultrasonic unit (13), to create a consolidated, stiff laminate (18) and cutting said consolidated, stiff laminate (18) to a preform.

Abstract: An article of footwear is provided having a pressurized fluid-filled chamber in the sole structure having a continuous perimeter weld and lacking an inflation channel. The chamber may be formed from opposing polymer sheets, a continuous perimeter weld lacking a weld channel bonding the sheets and forming an interior void between the sheets, and a fluid disposed within the interior void exerting outward pressure on the sheets. A method for making the chamber can include placing a pair of polymer sheets in an opposing arrangement, pressing opposing perimeter weld portions of the sheets against each other to form an airtight seal along a perimeter region of an interior void, supplying a flow of pressurized air between the opposing sheets into the interior void, and, while maintaining a desired fluid pressure, welding the perimeter weld portions of the sheets to each other. A high-frequency welder for forming chamber is also provided.

Abstract: In a method for producing drip irrigation tubes, a body is extruded, from which the tube is formed and in which metering elements (10) are attached, which are connected to the body by means of ultrasonic welding. For such drip irrigation tubes, the water enters the metering elements (10) from the inside of the drip irrigation tubes through inlet openings, flows through the metering elements, and exits the drip irrigation tubes through outlet openings in a metered manner. The body is formed into a tube body, which is flattened, and the metering elements (10) come to be situated in a central region inside this flattened tube body. The flat tube body is fed between a sonotrode (6) and an anvil (7) of an ultrasonic welding device (3), and the metering elements (10) are welded to the walling of the tube body. The invention further relates to a device for carrying out the method.

Abstract: An ultrasonic welding system includes a controller, an electrically powered linear actuator driving a movable element to which an ultrasonic welding stack is mounted to move linearly and apply a controlled force and/or speed to a workpiece. A sensor measures a control variable and outputs to the controller a signal corresponding thereto. Based on this signal, the controller causes the linear actuator movable element to apply through the ultrasonic welding stack a predetermined positive initial force at an initiation of a welding operation and to limit a linear displacement of the ultrasonic welding stack to a predetermined initial displacement until the dynamic signal output from the sensor indicates that a sensed variable satisfies a predetermined condition. Based on the signal relating to the satisfied predetermined condition, the controller moves the ultrasonic welding stack in accord with a default weld profile or a weld profile selected from available weld profiles.

Abstract: A method for monitoring and controlling a vibration welding system includes collecting sensory data during formation of a welded joint using sensors positioned with respect to welding interfaces of a work piece. A host machine extracts a feature set from a welding signature collectively defined by the sensory data, compares and correlates the feature set with validated information in a library, and executes a control action(s) when the present feature set insufficiently matches the information. A welding system includes a sonotrode, sensors, and the host machine. The host machine is configured to execute the method noted above.

Abstract: An ultrasonic welding machine and method are provided. The machine includes a base portion having a first aperture that defines first internal threads. The machine further includes an electrically non-conductive member disposed on the base portion having a second aperture that is aligned with the first aperture. The machine further includes an anvil portion disposed on the electrically non-conductive member having a third aperture that is aligned with the second aperture. The machine further includes a first bolt disposed through the third aperture and the second aperture that is threadably received in the first internal threads, and the first bolt and the anvil portion are electrically isolated from the base portion.

Abstract: The sonotrode and anvil of co-pending application Ser. No. 12/925,652, for advanced ultrasonic welding of work pieces, are readily incorporated into new form-fill-seal machines, but existing machines with heat-seal stations pose difficult problems for swapping of the sealing packages. Kits enabling heat station replacement, with the further improved sonotrode and anvil disclosed herein, comprise: a housing; a linear rail fixed thereto; anvil and sonotrode support members; and a parallel gripper. Each of the anvil and sonotrode support members is slidably attached to the rail(s) and are also connected to a respective piston of the gripper, permitting actuation of each through cycling of the gripper pistons.

Abstract: A method for forming a knockout on a raceway includes removing a knockout from the raceway to form an opening, positioning the knockout within the opening, and thereafter attaching the knockout to the raceway by welding the knockout and the raceway together.

Abstract: A sonotrode holder for the oscillatable fastening of a sonotrode at a carrier is provided, wherein a direction of oscillation extends from the carrier to the sonotrode and the sonotrode holder has at least one oscillating body having at least one cut-out and the oscillating body is connected to the sonotrode at one end and has a mount which is configured for fastening at the carrier.

Abstract: The present invention relates to an ultrasonic welding device with a generator for generating a high-frequency a.c. voltage, a converter for converting the a.c. voltage into a mechanical ultrasonic vibration and a sonotrdoe for transmitting the ultrasonic vibration to material to be worked, wherein the converter and the sonotrode are rotatable and a rotary coupler is arranged between the generator and the converter for the transmission of electrical energy from a static arrangement to a rotating arrangement, comprising a stationary element and an element that is rotatable in relation to the stationary element, wherein the stationary element comprises a primary circuit with two input terminals, which are connected to each other by means of a second coil with M turns, wherein the first and second coils are arranged in such a way that, when an a.c. voltage is applied to the input terminals, the magnetic field generated by the first coil induces an a.c. voltage in the second coil.

Abstract: The described embodiments relate generally to ultrasonic welding and more particularly to performing an ultrasonic welding operation while rotating one part relative to a mating part. A non-uniform energy director can be disposed along a mating surface of a first part. The energy director can maintain a constant cross-sectional area while having a smaller height near a pivot point for the rotation and a larger height away from the pivot point. The varying height of the energy director can allow the tip of the energy director to come in contact with a second part rotating relative to the first part at approximately the same time during the ultrasonic welding process.

Abstract: A vibration welding system includes an anvil, a welding horn, a thin film sensor, and a process controller. The anvil and horn include working surfaces that contact a work piece during the welding process. The sensor measures a control value at the working surface. The measured control value is transmitted to the controller, which controls the system in part using the measured control value. The thin film sensor may include a plurality of thermopiles and thermocouples which collectively measure temperature and heat flux at the working surface. A method includes providing a welder device with a slot adjacent to a working surface of the welder device, inserting the thin film sensor into the slot, and using the sensor to measure a control value at the working surface. A process controller then controls the vibration welding system in part using the measured control value.

Abstract: In a ultrasonic processing apparatus, upstream conveyor and downstream conveyor allow a fibrous web to run in a machine direction continuously. Between the conveyors, a working surface of a first mechanical element serving as a stationary element of the ultrasonic processing apparatus extends diagonally with respect to the machine direction. The fibrous web runs in the machine direction above the working surface. The ultrasonic processing apparatus includes a second mechanical element adapted to move in a direction diagonally intersecting the machine direction. The working surface of the first mechanical element cooperates with the second mechanical element to subject the fibrous web to ultrasonic processing. One of an ultrasonic horn and an anvil is used as the first mechanical element and a remainder of the ultrasonic horn and the anvil is used as the second mechanical element.

Abstract: A tubular support for use with a hollow fiber membrane is made with an apparatus that comprises a forming machine and an ultrasonic welding machine. The apparatus may also include a coating nozzle for depositing a dope on the support. In operation, filaments are formed into a tubular structure in which the filaments cross each other in radial and circumferential directions, for example a braid. The filaments are ultrasonically welded together at intersections between them. The support is combined with a polymeric membrane wall to form a hollow fiber membrane.

Abstract: The invention relates to a torsion sonotrode, comprising two mutually opposing end faces (S1, S2) and a circumferential surface (U) which surrounds a torsion axis (T) and on which at least one working surface (A1, A2, A3, A4) is provided at a radial distance from the torsion axis (T).

Abstract: Ultrasonic welding tools for joining two or more components include a horn and an anvil. The horn work surface(s) has a plurality of protrusions, each having a base, a lower portion projecting from the base, and an upper domed portion projecting from the lower portion, substantially resembling a domed cone. The anvil work surface(s) has a plurality of protrusions, each having a basal portion and an upper tapering portion projecting from the base, substantially resembling a pyramid. The span of each pyramid base is no greater than the span of each domed cone base. The geometric center of each domed cone base on each horn work surface aligns with the geometric center of the valley surrounded by four adjacent pyramids on the matching anvil work surface.

Abstract: An ultrasonic ribbon bonding system is provided. The ultrasonic ribbon bonding system includes a workholder for supporting a workpiece during a ribbon bonding operation. The workholder defines a first plurality of standoffs extending above a surface of the workholder, the first plurality of standoffs configured to contact the workpiece during the ribbon bonding operation. The ultrasonic ribbon bonding system also includes a bond head assembly carrying a ribbon bonding tool, the ribbon bonding tool being configured to bond a ribbon to the workpiece during the ribbon bonding operation.

Abstract: An ultrasonic welding machine and method are provided. The machine includes an ultrasonic welding horn operably coupled to a housing. The machine further includes an anvil operably coupled to the housing. The machine further includes a removable collar assembly that is coupled around a portion of an outer surface of the ultrasonic welding horn. The removable collar assembly has at least first and second set screws that contact the housing such that when at least one of the first and second set screws are moved inwardly toward the housing, the removable collar assembly rotates the ultrasonic welding horn to align the ultrasonic welding horn relative to the anvil.

Abstract: A manufacturing method of an insulation cap, includes the steps of: supplying an elongated tube from a tube supplying unit to a tube placing table; moving a tube press-fastening portion and a welding body portion towards the tube placing table so as to press-fasten a press-fastening position of the tube placed on the tube placing table and to press-contact a press-contacting position of the tube placed on the tube placing table; performing a welding process with respect to the press-contacting position of the tube; moving the tube placing table during the welding process to feed the tube in a tube feeding direction by a specified amount; blanking the tube subjected to the welding process after feeding the tube to form the insulation cap; and discharging the formed insulation cap from a blanking position.

Abstract: Stoppers for preventing lifting of the worked sheet are comprised of two stoppers near the press and above the worked sheet at a predetermined space from the worked sheet, one of the stoppers arranged at an upstream side from the press and the other of the stoppers arranged at a downstream side from the press, whereby when the press seals the worked sheet and then moves upward, the preventive stoppers prevent the worked sheet from being lifted up.

Abstract: Advanced ultrasonic welding components of co-pending application Ser. No. 12/925,652 are readily incorporated into new form-fill-seal machines, but owners of existing machines utilizing heat-seal stations were unsuccessful at swapping the sealing packages. Retrofit kits to a replace heat sealing station with an advanced ultrasonic sonotrode and anvil comprise: a housing; a linear rail fixed thereto; first and second bearing carriages being slidable upon the rail; and first and second fluidic muscles. Each of the fluidic muscles is mounted with a first end fixed to a respective housing wall, and a second end fixed to a respective bearing carriage, permitting actuation of each carriage through pressurization and depressurization of the muscles. The advanced anvil and sonotrode may be secured to respective carriages.

Abstract: The invention relates to a method for producing a transverse sealing seam in a tubular bag (6) having a longitudinal sealing seam (5), wherein the tubular bag (6) is passed through between a sonotrode (1) and an anvil (2) and, in order to produce the transverse sealing seam, the sonotrode (1) and the anvil (2) are moved toward each other so that a welding force is applied to the tubular bag (6). In order to provide a method and transverse sealing device with which the stated disadvantages can be overcome at least reduced, the longitudinal sealing seam (5) is moved through a gap (8, 7?) formed in the sonotrode (1) or the counter tool (2) at least during the application of the welding force.

Abstract: An apparatus and a method for ultrasonic processing improved so as to prevent a fibrous web from being disfigured due to the ultrasonic processing. In an apparatus to ultrasonically process a fibrous web running in a machine direction MD, a first mechanical element defined by one of an ultrasonic horn and an anvil and a second mechanical element defined by the other of the ultrasonic horn and the anvil are moved forward or backward in a direction crossing the machine direction MD so as to pass transversely across the fibrous web.

Abstract: An ultrasonic tool having a sonotrode having a single weld region and two nodal regions formed on either side of the weld region. Two rigid mount boosters are each coupled to either side of the weld region. One transducer is coupled to one of the rigid mount boosters. Two ultrasonic stack mounting rings are each configured to be coupled to a housing assembly at a non-nodal region and coupled to one of the rigid mount boosters at a nodal region.

Abstract: The present invention relates to an ultrasound welding device for welding material webs, for example, films, having an anvil (1) with an anvil welding surface, and a sonotrode (2) with a sonotrode welding surface, wherein the anvil is movable relative to the sonotrode. In order to provide an ultrasound welding device that reacts promptly to changes in material thickness and properties of the material to be welded, the invention proposes to provide a counterforce generator, which exerts a counterforce on the anvil in the direction of the sonotrode, if the anvil is moved out of a reference position away from the sonotrode.