A substrate in the form of a continuous sheet is fed towards a belt conveyor and is lied out on the conveyor itself. By means of the belt conveyor, the substrate is moved along a feed direction, while a printing unit operating above the belt conveyor realizes a print pattern on the substrate. The printed substrate is withdrawn by a traction unit operating downstream of the belt conveyor. In a section of its longitudinal extension between the belt conveyor and the traction unit, the substrate is subjected to a braking action to retain the substrate in contrast to traction actions induced on the same by the traction unit. A drying group operates on the substrate in the area affected by the braking action, with a combined action of radiation and ventilation.

A printing apparatus includes a printing part configured to perform printing on a recording medium in which a label is attached to a backing sheet, transport rollers configured to sandwich and transport the recording medium, a peeling member configured to peel off the label from the backing sheet by bending the recording medium, and a tensioner configured to apply a tension in a direction opposite to a transport direction of the recording medium transported by the transport rollers to the recording medium, wherein, in the transport direction, the transport rollers are positioned downstream of the peeling member, and the tensioner is positioned upstream of the peeling member.

The ink is discharged to the printing medium F located in the first range R1 from the upstream end Wuu of the upstream winding part Wu where the support roller 26a and the printing medium F are in contact to the downstream end Wdd of the downstream winding part Wd where the support roller 26e and the printing medium F are in contact. The support rollers 26a, 26e located on both ends of the first range R1 are in contact with the printing medium F on the peripheral surfaces 261 having such a concave shape to increase the diameter from the center toward the ends in the width direction Y (axial direction). This causes these support rollers 26a, 26e to suppress the formation of wrinkles in the first range R1 where the ink is discharged.

A transport device includes a transport roller configured to transport a roll paper, a winding unit configured to wind the roll paper transported, a tension applying unit configured to apply tension to the medium between the transport roller and the winding unit, and a control unit configured to control the tension applying unit. The control unit is configured to control the tension applying unit to maintain a state where the tension is released, at least during an acceleration period of rotation of the transport roller within a period in which the transport roller applies a transporting force to the roll paper.

In one example, a printed output inspection unit (300) for a web printing system (100). The inspection unit has a first L-inverter (310) disposed in a first plane (315), and a second L-inverter (320) disposed in a second plane (325) offset from the first plane in a direction orthogonal to the first plane. The inspection unit (300) also has an inspection area (340,350) between the first and second L-inverters to view a side (307,309) of a web substrate (305), the inspection area extending in the direction orthogonal to the first plane.

A winding apparatus that can restrain a medium from being wound unevenly when a long medium is wound around a winding roller and a printing apparatus that includes the winding apparatus are provided. A winding apparatus includes a winding section that has a winding roller rotatably supported therein and winds a long medium around the winding roller. The winding section also has a pressing portion that presses the medium toward the winding roller.

A conveying device includes a rotator, a drier, and a conveyance direction changer. The rotator winds a web-shaped recording medium around a predetermined region of an outer peripheral surface of the rotator with one side of the web-shaped recording medium facing outward and conveys the recording medium with rotation. The drier is disposed downstream from the rotator in a direction of conveyance of the recording medium, to dry and convey the recording medium. The conveyance direction changer is disposed on a conveyance path of the recording medium between the rotator and the drier. The conveyance direction changer has an outer peripheral surface that includes an opposed region opposed to the one side of the recording medium. The opposed region has openings to blow gas toward the one side of the recording medium. The rotator and the drier are disposed at positions not overlapping with each other in a plan view.

A medium feeding apparatus includes a feeding portion that performs a feeding operation, which feeds a medium to a downstream side, and a reverse feeding operation, which feeds the medium to an upstream side, and a wind-up portion that performs a wind-up operation, which winds up a medium fed to the downstream side by the feeding operation, and a unwinding operation that unwinds the wound up medium, in which the wind-up portion performs the unwinding operation prior to the reverse feeding operation.

In methods and systems for reducing the undulation of a recording medium that has been printed to in an inkjet printer, operating parameterssuch as the applied drying energy and/or the web tension of the recording medium during the drying of the recording mediumare set or adapted for or during the printing operation in order to reduce the undulation of the printed and dried recording medium.

A control device of a transport device includes a control unit configured to control a roll motor for rotating a first rotary shaft on which a medium is held and a transport motor for rotating a first driving roller, a tension detection unit configured to derive, for each tension detection cycle, a detected tension value of a tension applied to a tension adjustment portion of the medium, and a tension F/B unit configured to calculate a tension F/B correction amount by feedback control based on a deviation between a target tension and the detected tension value. The control unit is configured to calculate a driving force by the roll motor based on the tension F/B correction amount, and control the roll motor based on the driving force.