Abstract: Wrapping material (2) supplied to a packaging machine is caused to advance along a predetermined feed path (3) through a first checking station (27a) where an emitter device (29) charges at least one predetermined portion (30, 34) of the wrapping material (2) electrostatically, and a second checking station (27b) where a sensor (31) detects the presence of the electrostatic charges applied previously to the predetermined portion (30, 34) of the material (2). The sensor (31) is positioned along the feed path (3) downstream of and at a predetermined distance from the emitter device (29).

Abstract: Cigars are released from a feed station onto first and second conveyor belts and directed along a predetermined feed path, part of which coinciding with a wheel interposed between the two belts and equipped with a set of needles serving to pierce the cigars by engaging at least one respective end portion; the wheel is also equipped with a set of clamp elements, each able to restrain a single cigar and caused to revolve in stable alignment with a relative needle. The single needle is fashioned from a resistive metal and connected to an electrical power source in such a way that it can be heated by applying a current and inducing the Joule effect.

Abstract: Wrapping material utilized by a packaging machine is advanced along a set feed path through a station where an accessory material, typically adhesive, is applied in spots to selected areas of the surface, whereupon the material is charged electrostatically at a first station, and thereafter sensed at a second station to reveal the distribution of the charges; the electrostatic charges register more strongly on and around the spots, so that by measuring any variation in strength relative to the remainder of the surface, identifiable with faulty application of the adhesive, substandard material can be detected before it reaches the wrapping stations of the machine.

Abstract: An automatic machine for processing articles, and having a conveyor which feeds the articles along a path in a given feed direction and has a movable member; and a reading device for determining the position of the movable member; the reading device cooperates with a permanent magnet housed inside the movable member and positioned with its polar axis perpendicular to the feed direction, and has two linear Hall-effect sensors arranged side by side parallel to the feed direction so as to have zero sensitivity in a direction parallel to the feed direction; and the instant in which the movable member is in a definite detection position with respect to the reading device is detected by determining the instant in which the output signal of the Hall-effect sensor downstream with respect to the travelling direction of the movable member inverts.

Abstract: In a method for wrapping an article in a sheet of thermoplastic wrapping material, the temperature of an at least partly metal belt (5) looped and induction heated to seal wrapping material (4) is detected by detecting a first signal (S1) to the voltage (V) applied to the belt (5), and a second signal (S2) related to the current (I) circulating along the belt (5); and by calculating the electric resistance (R) of the belt (5) as a function of the first and second signal (S1, S2); the electric resistance (R) of the belt (5) being related to the temperature (T) of the belt (5).

Abstract: Cigars are released from a feed station onto first and second conveyor belts and directed along a predetermined feed path, part of which coinciding with a wheel interposed between the two belts and equipped with a set of needles serving to pierce the cigars by engaging at least one respective end portion; the wheel is also equipped with a set of clamp elements, each able to restrain a single cigar and caused to revolve in stable alignment with a relative needle. The single needle is fashioned from a resistive metal and connected to an electrical power source in such a way that it can be heated by applying a current and inducing the Joule effect.

Abstract: An automatic machine for processing articles, and having a conveyor which feeds the articles along a path in a given feed direction and has a movable member; and a reading device for determining the position of the movable member; the reading device cooperates with a permanent magnet housed inside the movable member and positioned with its polar axis perpendicular to the feed direction, and has two linear Hall-effect sensors arranged side by side parallel to the feed direction so as to have zero sensitivity in a direction parallel to the feed direction; and the instant in which the movable member is in a definite detection position with respect to the reading device is detected by determining the instant in which the output signal of the Hall-effect sensor downstream with respect to the travelling direction of the movable member inverts.

Abstract: In a method for wrapping an article in a sheet of thermoplastic wrapping material, the temperature of an at least partly metal belt (5) looped and induction heated to seal wrapping material (4) is detected by detecting a first signal (S1) related to the voltage (V) applied to the belt (5), and a second signal (S2) related to the current (I) circulating along the belt (5); and by calculating the electric resistance (R) of the belt (5) as a function of the first and second signal (S1, S2); the electric resistance (R) of the belt (5) being related to the temperature (T) of the belt (5).

Abstract: Wrapping material (2) supplied to a packaging machine is caused to advance along a predetermined feed path (3) through a first checking station (27a) where an emitter device (29) charges at least one predetermined portion (30, 34) of the wrapping material (2) electrostatically, and a second checking station (27b) where a sensor (31) detects the presence of the electrostatic charges applied previously to the predetermined portion (30, 34) of the material (2). The sensor (31) is positioned along the feed path (3) downstream of and at a predetermined distance from the emitter device (29).

Abstract: A machine (1) and method for wrapping products (2), whereby a product (2) is applied with a respective sheet (3) of wrapping material, is fed by a wrapping conveyor (4) along a first path (P1) to fold the sheet (3) of wrapping material about the product (2) to form a tubular wrapping (7), and is then fed by the wrapping conveyor (4) along a second path (P2) to stabilize, by sealing, the tubular wrapping (7); a sealing element (11) being fed, by a further conveyor (12) and in time with the product, along a third path (P4) parallel to the second path (P2), so as to be applied to the second path (P2), so as to be applied to the tubular wrapping (7) and seal two superimposed portions (8) of the tubular wrapping (7).

Abstract: Wrapping material utilized by a packaging machine is advanced along a set feed path through a station where an accessory material, typically adhesive, is applied in spots to selected areas of the surface, whereupon the material is charged electrostatically at a first station, and thereafter sensed at a second station to reveal the distribution of the charges; the electrostatic charges register more strongly on and around the spots, so that by measuring any variation in strength relative to the remainder of the surface, identifiable with faulty application of the adhesive, substandard material can be detected before it reaches the wrapping stations of the machine.

Abstract: Rolls of metallized strip material are changed automatically at a station incorporating a device by which the thickness of the strip material is sensed utilizing a resonant circuit driven at a frequency other than its own resonant frequency and consisting in a coil with a toroidal core affording an opening or gap through which the running strip material is directed; a voltage sensor connected to the terminals of the coil pilots the operation of two switched outputs by way of respective comparators such as can be preset and activated parametrically in response to selected voltage values registering at the terminals of the coil with variations in inductive reactance determined by and indicating the thickness and the electrical and physical properties of the passing strip.

Abstract: A method for telecamera-checking of products (1) wrapped with transparent material, in particular packets of cigarettes, in which a product (1) wrapped with transparent material is illuminated by an ultraviolet lamp (6) and is scanned by a telecamera (4), which feeds an image of the product (1) into an image processor (5) to verify the soundness of the wrapped product (1) by processing the image in accordance with a determined programme.