A printing apparatus includes a heat transfer system for transferring heat away from or to a print medium moving in a movement direction through the printing apparatus. The heat transfer system includes a heat transfer member with a rotatable support surface configured for supporting the print medium. The heat transfer member is provided with at least one channel. The support surface is rotatable around an axis in order to move the print medium in the movement direction. A fluid circulation means is configured for supplying a fluid through said at least one channel. The at least one channel is configured such that, in operation, when fluid is supplied through said at least one channel, torque is generated in a fluido-mechanical manner around said axis, contributing to a rotational movement of the support surface of the heat transfer member.

A suction or blow thermal roller includes: a cylindrical body extending along a longitudinal direction; the cylindrical body including at least one inner tubular element and at least one outer tubular element that is concentrically arranged around the inner tubular element; the inner tubular element includes an outer diameter d and the outer tubular element includes an inner diameter D, being D>d; two hubs, each arranged at one end of the cylindrical body; at least one heat-exchange chamber realized between the inner tubular element and the outer tubular element. The roller includes a coating layer for the inner tubular element. The coating layer includes at least one rib arranged along a helical path around the longitudinal direction. The at least one rib is made in one piece in the coating layer, realizing at least one helical channel between the coating layer and the outer tubular element.

A printing machine for printing on a printing substrate web includes a plurality of inline flexographic printing units which are disposed in a plane accessible to an operator of the machine. Each one of the two flexographic printing units of a respective duplex printing station includes a respective impression cylinder and a dryer disposed between the two impression cylinders along a path of web travel of the web of printing substrate. A method of operating the printing machine is also provided.

A thermosetting unit, in particular for a textile printer, includes a pair of stationary supports, a thermosetting roller extending between said stationary supports and rotatably carried by said stationary supports around a longitudinal axis thereof, a stationary infrared lamp extending inside said thermosetting roller and having opposite ends supported by said stationary supports, and a temperature-uniforming device housed inside the thermosetting roller.

A supporting structure for a temperature sensor, and a drying device provided with the supporting structure. The supporting structure includes a front panel, a rear panel, a first supporting member having both ends in a longer-side direction of the first supporting member, and a second supporting member attachable to and detachable from the first supporting member. In the supporting structure, both ends of the first supporting member are removably supported by the front panel and the rear panel. In the supporting structure, the temperature sensor is disposed on the second supporting member, and the temperature sensor detects a surface temperature of a heating roller disposed between the front panel and the rear panel.

It is disclosed a conditioning roller for use within a printing system. The conditioning roller comprises: a roller body comprising an inner volume and an outer surface; a conditioning media attached to the outer surface of the roller body; a heating element; and a fluid dispensing mechanism. The heating element and the fluid dispensing mechanism are provided to act on the conditioning media from the inner volume of the roller body as to heat or wet the conditioning media.

A heating roller for a wet ink-based image forming apparatus includes a roller having a contact surface to contact a print medium having wet ink deposited thereon by wet ink-based image forming apparatus. The heating roller conductively heats the print medium and dries and flattens the print medium. The heating roller includes a heating element embedded along the roller. The heating element rotates with the roller as the roller rotates. The heating element generates and conducts heat to the contact surface so as to conductively heat the print medium through the contact surface when the contact surface contacts the print medium.

Power allocation in printing devices is disclosed. Independent load requests are received from printing device heater systems. Power grants are allocated based on a general power arbitration of a power source in response to the independent load requests. A power grant is adjusted based on an orientation of a medium to provide an adjusted grant from the power source to a printing device heater system of the printing device heater systems.

A thermosetting unit, in particular for a textile printer, includes a pair of stationary supports, a thermosetting roller extending between said stationary supports and rotatably carried by said stationary supports around a longitudinal axis thereof, a stationary infrared lamp extending inside said thermosetting roller and having opposite ends supported by said stationary supports, and a temperature-uniforming device housed inside the thermosetting roller.

A thermal roller (1) includes: a cylindrical body (2) extending along a longitudinal direction (X-X), the cylindrical body (2) including at least one inner tubular element (3) and at least one outer tubular element (4) that is concentrically arranged around the inner tubular element (3), the inner tubular element (3) includes an outer diameter d and the outer tubular element 4 includes an inner diameter D, being D>d; two hubs (6), each arranged at one end of the cylindrical body (2); at least one heat-exchange chamber (10) realized between the inner tubular element (3) and the outer tubular element (4). The roller includes: a coating layer (11) for the inner tubular element (3) made of plastics, and at least one helical channel (13) between the coating layer (11) and the outer tubular element (4). The helical channel (13) is realized at least partially in the coating layer (11).