A sheet supplying apparatus, which is capable of winding a sheet tightly, includes a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction, a sensor that detects a leading end portion of the sheet separated from an outer circumferential surface of the roll, and a contact body that presses the outer circumferential surface. Before the sheet is fed, in a state in which the contact body presses the outer circumferential surface, the driving unit causes the roll to continuously rotate in the second direction until a detection cycle of the leading end portion by the sensor is less than a predetermined value.

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 tension applying device is attached to a sheet conveyance device. The sheet conveyance device includes a feeding roller for feeding a continuous-form sheet and a winding roller for winding the continuous-form sheet fed from the feeding roller. The tension applying device applies tension to the continuous-form sheet between the feeding roller and the winding roller. The tension applying device includes a guide rail, a slider, a tension bar, and an angle adjustment mechanism. The guide rail is inclined downward toward a continuous-form sheet. The slider slides along the guide rail. The tension bar is supported by the slider and brought into pressure contact with the continuous-form sheet by weight of the slider. The angle adjustment mechanism adjusts an inclination angle of the guide rail with respect to a horizontal direction.

An expansion device includes an unexpanded slit sheet roll that is wound on a paper core that is longer than the width of the slit sheet paper roll. The paper core is placed onto a rod member. An adjustable downward pressure is exerted on the paper core and the paper core exerts pressure on the rod member. As the paper is pulled, the downward pressure creates the friction required to enable the unexpanded slit, sheet to be unwind and fed while simultaneously expanding.

A sheet supplying apparatus, which is capable of winding a sheet tightly, includes a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction, a sensor that detects a leading end portion of the sheet separated from an outer circumferential surface of the roll, and a contact body that presses the outer circumferential surface. Before the sheet is fed, in a state in which the contact body presses the outer circumferential surface, the driving unit causes the roll to continuously rotate in the second direction until a detection cycle of the leading end portion by the sensor is less than a predetermined value.

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.

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.

An apparatus is provided for handling overlay sheet material on a cutting apparatus including a conveyor for moving work material in a longitudinal direction and a support for positioning a tensioner frame adjacent the conveyor. A tensioner frame, attached to the support, has a nip wheel and a drive for rotating the nip wheel with a tangential speed in excess of the longitudinal conveyor speed attached to the tensioner frame. The nip wheel engages the overlay sheet material applying a tension thereto in the same longitudinal direction as the conveyor.

The present invention relates to a machine for producing multi-layer cardboard or paper, or a machine for either printing or converting, starting from a reel of paper, cardboard or other material. In general, the invention can be applied to machines wherein a reel of different materials is unwound and which requires a contrast system to regulate the tensioning of the ribbon. In particular, the invention relates to a system for braking said reel.

In particular, the invention relates to a braking system (2) for a support member (1) of a reel (B), for example, a reel of paper in a machine for producing cardboard or corrugated cardboard, wherein said braking system (2) comprises a motor-generator device (8) and a mechanical brake device (9) arranged coaxially.

An expansion device includes an unexpended slit sheet roll that is wound on a paper core that is wider than the slit sheet paper. The paper core is placed into a yoke that holds the paper in position on each side of the unexpended slit sheet material. An adjustable downward pressure is exerted on the paper core and the paper core exerts pressure on the yoke. As the paper is pulled, this downward pressure creates the friction required to enable the unexpended slit sheet to be unwind and fed while simultaneously expanding. A blank sheet is formed into a box that stabilizes slit paper sheet wound around a core member.