A blade assembly of a waste catchment system for a roller having a support plate for attachment to a tray of the waste catchment system and a blade holder. The blade holder configured to receive a blade having a longitudinal axis and a free edge extending in the direction of the longitudinal axis and adapted to engage with the roller to be cleaned. The blade holder configured to receive and retain the blade, the blade being removably attachable to the blade holder. One of the blade holder and blades includes a channel and the other of the blade holder and blade includes a protrusion configured to be seated in and retained within the channel. There is a clearance fit between the channel and the protrusion.

A blade assembly of a waste catchment system for a roller having a support plate for attachment to a tray of the waste catchment system and a blade holder. The blade holder configured to receive a blade having a longitudinal axis and a free edge extending in the direction of the longitudinal axis and adapted to engage with the roller to be cleaned. The blade holder configured to receive and retain the blade, the blade being removably attachable to the blade holder. One of the blade holder and blades includes a channel and the other of the blade holder and blade includes a protrusion configured to be seated in and retained within the channel. There is a clearance fit between the channel and the protrusion.

An ink recovery pipe comprises: an inflow port for receiving ink from an ink reservoir, and disposed at a position close to a first machine frame; and an outflow port for discharging ink into an ink container, and disposed at a position close to a second machine frame. A first restriction device is disposed at a position downstream of the inflow por. A first coupling part is configured to couple a high-pressure air generation part with the ink recovery pipe at a position downstream of the first restriction device. A first high-pressure air control device is configured to stop supply of high-pressure air to the ink recovery pipe, while ink is supplied to the ink reservoir, and supply the high-pressure air to the ink recovery pipe, after start of an ink recovery operation of recovering ink from the ink reservoir after completion of supply of ink.

Embodiments of an image panel are provided. The image panel includes a transparent substrate having a first major surface and a second major surface opposite the first major surface. A first image layer is disposed on the second major surface. A diffuser layer is disposed on the first image layer, and a second image layer is disposed on the diffuser layer. The second image layer includes mask regions and image regions. An optical density of the image panel is at least 3.0 in the mask regions and less than 3.0 in the image regions. The image regions are not visible from the first major surface when light is not incident upon the second major surface. The image regions are visible from the first major surface and form a composite image with the first image layer when light is incident upon the second major surface.

An image forming apparatus includes a rotatable cylindrical component to be cleaned, and a bar brush having a base substrate and bristles. The base substrate of the bar brush is located at a fixed position relative to the component to be cleaned. The bristles extend from the base substrate to contact the component to be cleaned. The bristles have free ends that form a tip end surface of the bar brush. The tip end surface has a curved shape that conforms with a surface of the component, when the bristles are not in contact with the surface to be cleaned.

An image forming apparatus includes a rotatable cylindrical component to be cleaned, and a bar brush having a base substrate and bristles. The base substrate of the bar brush is located at a fixed position relative to the component to be cleaned. The bristles extend from the base substrate to contact the component to be cleaned. The bristles have free ends that form a tip end surface of the bar brush. The tip end surface has a curved shape that conforms with a surface of the component, when the bristles are not in contact with the surface to be cleaned.

According to some examples a substance displacement apparatus may comprise a gas ejection aperture and a deflector arm. The gas ejection aperture may be to direct gas towards a roller having a surface on which a substance is disposed. The deflector arm may be moveable between a first position in which gas is directed away from a target area on the surface of the roller, and a second position in which gas is directed towards the target area on the surface of the roller, thereby to displace at least some of the substance from the surface of the roller within the target area. A method and a print apparatus are also disclosed.

The cleaning device (20) for cleaning a cylindrical roller (50), for example an anilox roller of a printing machine, includes a cleaning head (30) with a cleaning chamber (110), in which there is housed a mechanical cleaning member (60), and with which there are associated feeding members (70) for feeding a cleaning liquid into the cleaning chamber (110). The mechanical member (60) and cleaning liquid dispensed by the feeding members work in combination inside said cleaning chamber (110) to clean the lateral surface of the roller (50)

In an example, a method includes rotating a print apparatus component to be cleaned about a first rotational axis. A cleaning element having a cleaning surface in contact with the print apparatus component may be driven such that the cleaning surface has a component of motion which is parallel to the first rotational axis in a contact region. A relative velocity of the cleaning element and the print apparatus component may be varied during a cleaning operation.

In an example, a method includes rotating a print apparatus component to be cleaned about a first rotational axis. A cleaning element having a cleaning surface in contact with the print apparatus component may be driven such that the cleaning surface has a component of motion which is parallel to the first rotational axis in a contact region. A relative velocity of the cleaning element and the print apparatus component may be varied during a cleaning operation.