Abstract: In an example of the disclosure, service rotation of a drum along a longitudinal axis of the drum is caused. The service rotation is to apply a centrifugal force upon a liquid held by the drum. The centrifugal force pushes gas bubbles in the drum away from a curved surface of the drum and towards the longitudinal drum axis. The gas bubbles evacuate from the drum via an outlet tube positioned adjacent to the longitudinal drum axis. A production rotation of the drum is caused after the service rotation.

Abstract: In an example of the disclosure, service rotation of a drum along a longitudinal axis of the drum is caused. The service rotation is to apply a centrifugal force upon a liquid held by the drum. The centrifugal force pushes gas bubbles in the drum away from a curved surface of the drum and towards the longitudinal drum axis. The gas bubbles evacuate from the drum via an outlet tube positioned adjacent to the longitudinal drum axis. A production rotation of the drum is caused after the service rotation.

Abstract: There is disclosed a web transfer apparatus including a web transfer roller to advance a web, a foil transfer roller to advance a foil, and a movable curing unit. The foil transfer roller is movable between a first position and a second position. In the first position, the foil transfer roller is to press the foil against the web and in the second position the foil transfer roller is to disengage the foil from the web. The movable curing unit may comprise a curing device and may be movable between a first position adjacent to the web and a second position remote from the web.

Abstract: A method for determining a pump setpoint for delivering a desired volumetric flow rate of a substance through a channel comprises measuring a first volumetric flow rate through the channel for a first pump setpoint. The pump setpoint for delivering the desired volumetric flow rate is determined based on previously obtained performance curves of the pump and a flow resistance of the channel. Each performance curve represents the relation between flow rate and pressure at the pump's exit for a different setpoint. The flow resistance of the channel is determined based on said first volumetric flow rate and on the performance curves of the pump.

Abstract: There is disclosed a web transfer apparatus including a web transfer roller to advance a web, a foil transfer roller to advance a foil, and a movable curing unit. The foil transfer roller is movable between a first position and a second position. In the first position, the foil transfer roller is to press the foil against the web and in the second position the foil transfer roller is to disengage the foil from the web. The movable curing unit may comprise a curing device and may be movable between a first position adjacent to the web and a second position remote from the web.

Abstract: A method for determining a pump setpoint for delivering a desired volumetric flow rate of a substance through a channel comprises measuring a first volumetric flow rate through the channel for a first pump setpoint. The pump setpoint for delivering the desired volumetric flow rate is determined based on previously obtained performance curves of the pump and a flow resistance of the channel. Each performance curve represents the relation between flow rate and pressure at the pump's exit for a different setpoint. The flow resistance of the channel is determined based on said first volumetric flow rate and on the performance curves of the pump.