A packaging apparatus for packaging objects, in particular for packaging food portions, having a conveying device (10) for transporting a continuous web of a first packaging material (12), in particular of a bottom film, in a transport direction (TR); and having a feed device (14) for feeding a continuous web of a second packaging material (16), in particular of a top film, in the transport direction (TR), wherein the conveying device (10) comprises a first reception shaft (18) for receiving a first supply roll (20) of the first packaging material (12) and the feed device (14) comprises a second reception shaft (22) for receiving a second supply roll (24) of the second packaging material (16); wherein the first reception shaft (18) can be driven by means of a first drive motor (26) to carry out a rotational movement; and/or wherein the second reception shaft (22) can be driven by means of a second drive motor (28) to carry out a rotational movement, with the first and/or second drive motor (26, 28) in particular being a servomotor or servomotors.

A system for decurling a web from a roll of material comprises rollers, a decurling station actuator, a sensor, and a controller. The rollers are configured to pull the web along a path with an angle. The decurling station actuator is configured to shift one of the rollers relative to the other rollers to adjust the angle of the path. The sensor is configured to sense a characteristic of the roll of material and generate sensor data. The controller is configured to receive a signal representative of the sensor data and direct the decurling station actuator to shift one of the rollers based at least in part on the sensor data.

Rewinder for making paper logs of paper material including a detection system with optical means adapted to detect, in a succession of predetermined detection times, a succession of diameters assumed in such times by a log being formed in a winding station and a programmable electronic unit which compares the diameters measured by the optical means with a succession of corresponding preset diameters and to calculate a sequence of differences. The processing unit receives a signal relating to the value of the actual diameter of the completed log and determines a parameter related to the trend over time of the differences. Elements for adjusting the thickness of the paper web automatically adjust said thickness if the parameter is between predetermined values.

A control system is provided for a converting line. The converting line has an unwinder for unwinding web material from a roll of web material and at least one independently driven roll for directing the web material unwound from the unwinder to the converting line. The control system has a controller and a tension sensor configured to be arranged downstream of the at least one driven roll. The tension sensor is configured to sense a tension in the web as the web is passed downstream of the driven roll, generate a signal indicative of sensed web tension, and transmit the signal of sensed web tension to the controller. The controller is configured to a generate and transmit to the unwinder a signal to change the speed of the unwinder based upon the tension sensed by the tension sensor.

Rewinder for producing paper logs, comprising a winding station with a first winding roller, a second winding roller and a third winding roller driven by corresponding electric motors, including a detection system capable to detect a succession of diameters of the log being formed in the winding station and a programmable electronic unit connected to the electric motors. The system compares the measured diameters with a succession of corresponding diameters of predetermined value and to calculate a sequence of differences between these values. The electronic unit determines a parameter (a) related to the trend over time of the values. The electronic unit changes the relative speed of the first and second roll depending on the value of the parameter.

A liquid ejection apparatus includes a conveying unit, a winding unit, a printing unit, and a rotation control unit. The conveying unit is configured to intermittently convey a printing medium by a predetermined feed amount. The winding unit is configured to wind the printing medium conveyed by the conveying unit. The printing unit is configured to perform printing on the conveyed printing medium. The rotation control unit is configured to control the winding unit to rotate in a winding direction at a predetermined timing after the conveying unit has started to convey the printing medium intermittently, and then cause the winding unit to rotate in a reverse direction opposite to the winding direction.

A control system for a converting line has a sensor configured to sense a distance between the sensor and a surface of a roll of web material as the roll of web material is unwound from an unwinder and directed to the converting line. The controller is configured to: (i) determine a diameter measurement of the roll as the roll rotates based upon the sensor signals; (ii) store a plurality of data structures in a memory of a controller of a control system wherein the data structures comprise a plurality of data items associated together as the diameter measurements of the roll of the web material; (iii) process by a statistical regression analysis the data structures associated with the diameter; and (iv) generate signals for controlling the converting line based upon the processed diameter measurements.

Time required for initial operation and operation immediately after wound body replacement is shortened. A packaging device packages an object to be packaged using a wound body. An elongated sheet-shaped packaging material is wound into the wound body. The wound body includes a recording medium that stores information. The information recorded in the recording medium includes remaining amount information indicating a remaining amount of the packaging material in the wound body. The packaging device includes a drive unit that generates driving force in order to rotate the wound body, an information reader that reads the remaining amount information stored in the recording medium, and a controller that controls the packaging device. The controller sets a rotation speed of the wound body based on the remaining amount information read by the information reader.

A sensing arrangement for indicating the depletion of a coreless roll of absorbent paper web material in a dispenser, the sensing arrangement includes a roll support for supporting an inner circumference of the coreless roll, the roll support extending along a longitudinal center axis, the roll support comprising at least one roll expanding portion extending over a part of the roll support length and having a maximum radial extension defining a first radius from the center axis, and at least one sensing portion, extending longitudinally over another part of the roll support length and having a maximum radial extension defining a second radius from the center axis, wherein the first radius is greater than the second radius by a sensing offset length, and a sensing element arranged to sense at the sensing portion the amount of web material remaining on the roll when arranged over the roll support length.

There is provided a medium feeding apparatus including a feeding roller that feeds a printing medium, a roll holding portion that holds a roll body on which the printing medium is wound, an intermediate roller that pulls out the printing medium from the roll body and feeds the printing medium on the feeding roller, a rotation amount detection portion that detects an amount of rotation of the intermediate roller and an amount of rotation of the roll body when the printing medium is fed by the intermediate roller, and a controller that calculates a roll diameter of the roll body based on the detected amount of rotation of the intermediate roller and the detected amount of rotation of the roll body.