Provided is a medium supply device including a spindle that supports a medium having a roll shape, a supplying portion that supplies the medium supported by the spindle toward outside, a plurality of support rollers that support the medium in positions between the spindle and the supplying portion, a moving roller that, in a contact position between the support rollers, is capable of coming into contact with a bridging medium extending across the support rollers in a state where a load is applied to the bridging medium and that is capable of moving from the contact position to a non-contact position of non-contact with the bridging medium, and a moving mechanism configured to move the moving roller from the contact position to the non-contact position.

A printing assembly for digital printing on a continuous metal strip, including: a digital printing unit having a printing area and a conveyor belt arranged for advancing the continuous metal strip in a longitudinal direction through the printing area, an inlet guide unit located upstream of the printing unit and configured to guide the continuous metal strip along a path comprising at least one first movable bend which is freely movable in the longitudinal direction, and an outlet guide unit located downstream of the digital printing unit and configured to guide the continuous metal strip along a path comprising at least one second movable bend which is freely movable in the longitudinal direction.

A printing assembly for digital printing on a continuous metal strip, including: a digital printing unit having a printing area and a conveyor belt arranged for advancing the continuous metal strip in a longitudinal direction through the printing area, an inlet guide unit located upstream of the printing unit and configured to guide the continuous metal strip along a path comprising at least one first movable bend which is freely movable in the longitudinal direction, and an outlet guide unit located downstream of the digital printing unit and configured to guide the continuous metal strip along a path comprising at least one second movable bend which is freely movable in the longitudinal direction.

Methods and apparatus, including computer program products, are described for controlling web tensioning in a food packaging machine comprising a plurality of sub-systems. One or more local variable value are received, which indicate measurements by the food packaging machine of one or more physical parameters for a web tensioning sub-system. One or more remote variable values are received, which indicate measurements by the food packaging machine of one or more physical parameters for one or remote sub-systems. One or more control parameter values are determined for the web tensioning sub-system, by processing the remote and the local variable values using a reinforcement learning model and a local control model. One or more control parameters of the web tensioning sub-system are adjusted in accordance with the determined control parameter values.

A stretch film dispenser with a tension adjustment device includes a frame. The frame is provided with a film dispensing unit and the tension adjustment device. The tension adjustment device includes an adjustment rod. One end of the adjustment rod is threadedly connected with an adjustment unit. An elastic unit is connected between the frame and the film dispensing unit. When the adjustment unit rotates along the adjustment rod to generate downward axial displacement, the adjustment unit pushes the frame and the elastic unit to press the film dispensing unit, so that the film dispensing unit can be quickly adjusted in a different tension state when the film of the film roll is stretched.

Provided is a medium supply device including a spindle that supports a medium having a roll shape, a supplying portion that supplies the medium supported by the spindle toward outside, a plurality of support rollers that support the medium in positions between the spindle and the supplying portion, a moving roller that, in a contact position between the support rollers, is capable of coming into contact with a bridging medium extending across the support rollers in a state where a load is applied to the bridging medium and that is capable of moving from the contact position to a non-contact position of non-contact with the bridging medium, and a moving mechanism configured to move the moving roller from the contact position to the non-contact position.

An arrangement for controlling longitudinal forces acting on a web of packaging material being wound from a first reel to a second reel, said arrangement comprising a first roller having a first rotational axis and a second roller having a second rotational axis, wherein the first rotational axis is fixed while the second rotational axis is movable.

Provided is a slitter device capable of quickly supplying metal bands to a cutter stand and cutting same into strips with high speed and accuracy. The metal band slitter device comprises an unwinder that unwinds a metal band wound into a coil, a cutter stand that cuts the unwound metal band into narrow width strips, and a winder that winds the cut metal band into coils. The metal band slitter device is configured to comprise a tension adjustment unit on the winder side between the unwinder and the cutter stand that provides a constant tension to the metal band and a tension separating unit on the cutter stand side that separates the constant tension on the input side and tension on the output side.

A medium transport apparatus includes a transport section configured to support a medium and transport the medium in a transport direction, and a wrinkle reducing section configured to come into contact with the medium to reduce the formation of wrinkles in the medium. The wrinkle reducing section can change surfaces to come into contact with the medium. The medium transport apparatus having such a structure enables to reduce the formation of wrinkles in the medium.

A web transport system for transporting a web of media along a web-transport path including a fluid bar for guiding the web of media, and a scavenger blade positioned downstream of the fluid bar. A liquid is pumped through holes in an exterior bearing surface of the fluid bar, thereby pushing the web of media away from the fluid bar. The scavenger bar includes a blade edge facing the first surface of the web of media, the blade edge being spaced apart from the first surface of the web of media by a gap distance. The scavenger blade removes at least some liquid from the first surface of the web of media as it passes by the scavenger blade, thereby reducing the amount of liquid that is carried along to portions of the web-transport path that are downstream of the scavenger blade.