A winding device (10) for winding a web (92) onto a reel (90) has a drive shaft (20), a gear (30), a clutch shaft (63), an energy storage means (50), a clutch (60) and an output shaft (80). The gear (30) is configured, as a positive-engagement gear, to transmit a rotary movement of the drive shaft (20) to a first clutch shaft element (61) assigned to the clutch shaft (63). The clutch shaft (63) is connected via the clutch (60) with the output shaft (80) in order, selectively, to enable or prevent a transmission of torque between the clutch shaft (63) and the output shaft (80). The gear (30) has, without the energy storage means (50) having effect, a first predetermined transmission ratio (i_0) between the drive shaft (20) and the clutch shaft (63), and the energy storage means (50) is configured to store and release rotational energy and to vary the transmission ratio.

Provided is an unwinding device for unwinding a sheet from a sheet roll, the sheet roll being inserted onto the device. The unwinding device includes a shaft, a first rotating member and a second rotating member which are inserted onto the shaft, configured to be rotatable with rotation of the sheet roll, the sheet roll being inserted onto the first rotating member and the second rotating member, a first elastic member disposed between the first rotating member and the shaft, the first elastic member being configured to provide first back tension to the sheet when the first rotating member rotates, a second elastic member disposed between the second rotating member and the shaft, the second elastic member being configured to provide second back tension to the sheet when the second rotating member rotates, and a back tension controlling member disposed between the second elastic member and the shaft.

A conveying apparatus includes: a conveyor including a brake to apply brakes to a web, the conveyor configured to convey the web while giving tension to the web by applying brakes to the web using torque of the brake; and a controller configured to control the conveyor. The controller performs at least one of a first control or a second control. The first control includes determining a first torque of the brake during acceleration of the web to be a value depending on a first inertial load at the conveyor during the acceleration of the web. The second control includes determining a second torque of the brake during deceleration of the web to be a value depending on a second inertial load at the conveyor during the deceleration of the web.

Printer spindle assembly is provided including media spindle having first end and second end, a commutator disposed circumferentially at first end, at least two brushes in electrical contact with commutator and connected to voltage source, a plurality of electrically conductive springs serially disposed on media spindle in electrical communication with commutator, and a continuous electrically conductive path formed of electrically resistive material disposed along longitudinal axis of media spindle and configured to be in electrical contact with first spring end of one or more electrically conductive springs in the compressed state to form series circuit. Voltage source, brushes, and commutator form closed electrical circuit. Each electrically conductive spring is configured to be in uncompressed state in absence of media on media spindle and one or more of electrically conductive springs is configured to be in compressed state in presence of media on media spindle.

Printer spindle assembly is provided including media spindle having first end and second end, a commutator disposed circumferentially at first end, at least two brushes in electrical contact with commutator and connected to voltage source, a plurality of electrically conductive springs serially disposed on media spindle in electrical communication with commutator, and a continuous electrically conductive path formed of electrically resistive material disposed along longitudinal axis of media spindle and configured to be in electrical contact with first spring end of one or more electrically conductive springs in the compressed state to form series circuit. Voltage source, brushes, and commutator form closed electrical circuit. Each electrically conductive spring is configured to be in uncompressed state in absence of media on media spindle and one or more of electrically conductive springs is configured to be in compressed state in presence of media on media spindle.

The machine (1; 100) comprises a winding station (3; 101), adapted to receive secondary winding cores (T) coaxial with, and adjacent to, one another. A cutting device (11; 104) is also provided, with a plurality of blades (13; 105), arranged upstream of the winding station (3; 101) with respect to the feeding direction of the web material (N) and adapted to subdivide the web material into plurality of strips (S1-S5) of web material; The machine has a web material evaluation system and a programmable unit (71) for processing data collected by the web material evaluation system.

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 print apparatus has a supporting section for supporting a roll of a continuous sheet, a driving mechanism having a motor for rotating the roll supported by the supporting section, a detection unit configured to detect a rotation state of the roll supported by the supporting section, a conveyance roller for conveying the continuous sheet drawn out from the roll and a print unit configured to form an image on the continuous sheet conveyed by the conveyance roller. A control unit is configured to obtain information indicating a moment of inertia of the roll supported by the supporting section based on detected values of the detection unit and to adjust a driving torque of the motor based on the obtained information, intermittently during printing.

An unwinder of reels of web material wound around winding spindles (A), includes a unwinding station (13) with at least one unwinding member (23) to rotate a reel (B) that is located in the unwinding station and feed the web material toward a delivery path (E). Lifting members (51, 53) are provided to lift a spindle of a first exhausted reel from the unwinding station (13), in a removal position (PR). An insertion member (7; 33) is further provided to insert a second reel into the unwinding station (13). A pressing member (61) is arranged to press the web material coming from the first reel in removal position (PR) against the second reel in the unwinding station (13).

Provided is an unwinding device for unwinding a sheet from a sheet roll, the sheet roll being inserted onto the device. The unwinding device includes a shaft, a first rotating member and a second rotating member which are inserted onto the shaft, configured to be rotatable with rotation of the sheet roll, the sheet roll being inserted onto the first rotating member and the second rotating member, a first elastic member disposed between the first rotating member and the shaft, the first elastic member being configured to provide first back tension to the sheet when the first rotating member rotates, a second elastic member disposed between the second rotating member and the shaft, the second elastic member being configured to provide second back tension to the sheet when the second rotating member rotates, and a back tension controlling member disposed between the second elastic member and the shaft.