Abstract: An ultrasonic sealing device including a sonotrode for sealing a packaging material, including a piezoelectric transducer to generate ultrasonic acoustic vibrations for the sealing, a housing, a power circuit connected to the piezoelectric transducer. The power circuit is enclosed in the housing, and an absorbent arranged in the housing to absorb moisture in an atmosphere therein to lower humidity. A method of controlling humidity in an ultrasonic sealing device is also described.

Abstract: A sealing system (100) for sealing a packaging material is disclosed comprising an independently movable sealing device (101) being movably mounted on a track (102), a power generator (105) in communication with the sealing device (101) to supply a power signal (p1) at a frequency for said sealing over a power communication line (106), the sealing device (101) comprising a housing (107), a detection device (108) arranged in the housing (107) to register detection data of an environment therein and/or of sealing parameters associated with said sealing, and a transmitter (109) connected to the detection device (108), the transmitter comprising an encoder (110) to convert the detection data to at least one frequency pulse (p2), whereby the transmitter (109) communicates the at least one frequency pulse as a detection signal to a receiver (111) over the power communication line (106).

Abstract: An ultrasonic sealing device including a sonotrode for sealing a packaging material, including a piezoelectric transducer to generate ultrasonic acoustic vibrations for the sealing, a housing, a power circuit connected to the piezoelectric transducer. The power circuit is enclosed in the housing, and an absorbent arranged in the housing to absorb moisture in an atmosphere therein to lower humidity. A method of controlling humidity in an ultrasonic sealing device is also described.

Abstract: There is described a heating induction sealing device for forming a seal in a packaging material comprising an electrically conductive element and advancing along a direction; sealing device comprises one first inductive element and one second inductive element; first inductive element comprises a first portion facing second inductive element and defining with second inductive element a passage for packaging material; and a second portion; sealing device is selectively arrangeable in a first configuration, in which alternate currents flow within first and second inductive element; first portion and second inductive element are configured to generate a first magnetic flux transversally to direction, when sealing device is arranged in first configuration; second portion is configured to generate, in use, a second magnetic flux with a main component parallel to direction, when sealing device is arranged in first configuration.

Abstract: There is described a heating induction sealing device for forming a seal in a packaging material comprising an electrically conductive element and advancing, in use, along a first direction; the sealing device comprises at least one inductive element; inductive element comprises a first and second leg within which alternate currents flow, in use, in opposite direction; first leg is configured to induce, in use, a first portion of an eddy current within an area to be sealed of packaging material; second leg faces first leg along a second direction; second leg is configured to induce, in use, a second portion of eddy current within area to be sealed of packaging material; first and second leg have a length in a third direction parallel, in use, to first direction and transversal to second direction; first and second leg are nonsymmetrical with respect to third direction, so that seal is formed as continuous along second direction.

Abstract: An induction sealing device for producing packaged pourable food products from heat-seal sheet packaging material. The sealing device has a signal source, an inductor, and an impedance matching circuit connected between the signal source and the inductor. The impedance matching circuit has: two input terminals; a first and second line connected to the input terminals; a variable-capacitance stage having capacitive modules each made up of a capacitive element and a controlled switch; and a control stage to control the controlled switches. Each controlled switch includes: input terminals receiving a respective control signal from the control stage, with one input terminal of each controlled switch connected to the second line; a single two-way controlled switching element having a control terminal connected to the other input terminal of the controlled switch; a first current-conducting terminal connected to the first line, and a second current-conducting terminal connected to the second line.

Abstract: An induction sealing device for producing packaged pourable food products from heat-seal sheet packaging material. The sealing device has a signal source, an inductor, and an impedance matching circuit connected between the signal source and the inductor. The impedance matching circuit has: two input terminals; a first and second line connected to the input terminals; a variable-capacitance stage having capacitive modules each made up of a capacitive element and a controlled switch; and a control stage to control the controlled switches. Each controlled switch includes: input terminals receiving a respective control signal from the control stage, with one input terminal of each controlled switch connected to the second line; a single two-way controlled switching element having a control terminal connected to the other input terminal of the controlled switch; a first current-conducting terminal connected to the first line, and a second current-conducting terminal connected to the second line.