A roller for a transport belt of a vacuum transport assembly includes an elongate cylindrical body adapted for a rotatably fixed connection to a vacuum transport assembly. An outer surface of the roller defines a hollow inner channel, which extends along an axial region of the body. The outer surface is a running surface for a transport belt. An inlet at one end of the hollow inner channel receives air from an air source. Perforations are formed in the outer surface for allowing air pressure to be discharged from the hollow inner channel toward the transport belt. The air diffuses through the transport belt to detack a sheet from the transport belt.

A sheet conveying system comprising a first conveyor and a second conveyor arranged downstream of the first conveyor in a transport direction for taking-over a sheet from the first conveyor, the first conveyor having a belt that is driven to move over a stationary attraction mechanism, the attraction mechanism being arranged to exert, onto a sheet conveyed on the first conveyor, an attraction force that is proportional to an area of coverage of the sheet on the attraction mechanism, characterized in that the attraction mechanism is arranged to attract the sheet with a larger force per area in a downstream zone of the first conveyor than in an upstream zone thereof.

A system to transport a medium comprises a medium carrier, a negative pressure device, a vacuum chamber and a flow control device. The medium carrier is to carry the medium on a first side. The negative pressure device is to generate a negative pressure that is below an ambient pressure. The vacuum chamber is disposed on a second side of the medium carrier opposite to the first side and fluidly coupled to the negative pressure device. The flow control device is to manipulate a fluid flow from the vacuum chamber towards the negative pressure device. The flow control device is operated in response to the medium carrier changing its operational state.

Suction roller structure for the pneumatic transport of sheets inside an interfolding unit, comprising a suction source, an external roller (3) rotating with respect to the cylinder (1) and provided with longitudinal rows of bores (4) angularly spaced and selectively communicating with said internal cavity (2) during the angular rotation of the roller (3), a distribution of pneumatic valves (5) that are normally closed, inserted between said internal cavity (2) and at least one bore (4), cam means (6) operatively associated with the rotation of the roller (3) and arranged to open one or more of said valves (5) at one or more angular positions taken by the roller (3).

A substrate-feeding device has at least two acceleration devices, which are arranged one beside the other, beneath a storage region, and having a framework and a lifting frame, which lifting frame can be moved relative to the framework. The at least two acceleration devices are arranged for movement jointly with one another, and with the lifting frame. Each of the acceleration devices has at least one body of rotation, which is driven via a common shaft which has at least two shaft portions arranged one behind the other. Directly adjacent shaft portions are arranged in a state in which they are connected in each case, via a coupling. There are subassemblies provided which each have a deflecting device, a shaft portion and at least one transporting belt and which are each one of fastened on the lifting frame, and are arranged for movement jointly with the lifting frame and are connected to one another by virtue of their shaft portions being connected via couplings to form the common shaft. The invention also relates to a sheet-processing machine.

A digital printing device, comprising a suction transport means (1). The suction transport means (1) comprises a transport belt (11) used for transporting a sheet material. At least one first suction box (14), which is used for sucking the sheet material on the transport belt (11) by means of negative pressure during transport, is provided in the space defined by the transport belt (11). Multiple first suction holes in communication with the first suction box (14) are provided on the transport belt (11). At least one side of the first suction box (14) is provided with a movable door (15) which moves in a direction perpendicular to the transport direction to make the first suction box (14) fit the sheet material to maintain a negative pressure state. Using the transport belt (11) during printing, the digital printing device avoids the problem of poor registration accuracy, and improves the printing effect.

A digital printing device, comprising a suction transport means (1). The suction transport means (1) comprises a transport belt (11) used for transporting a sheet material. At least one first suction box (14), which is used for sucking the sheet material on the transport belt (11) by means of negative pressure during transport, is provided in the space defined by the transport belt (11). Multiple first suction holes in communication with the first suction box (14) are provided on the transport belt (11). At least one side of the first suction box (14) is provided with a movable door (15) which moves in a direction perpendicular to the transport direction to make the first suction box (14) fit the sheet material to maintain a negative pressure state. Using the transport belt (11) during printing, the digital printing device avoids the problem of poor registration accuracy, and improves the printing effect.

Embodiments of a system and method for shingulating, singulating, and synchronizing articles in an article feeder system are disclosed. The article feeder system may include a shingulating device configured to receive a stack of articles and to produce a positively lapped stack of articles, a plurality of picking devices configured to pick one or more articles from the positively lapped stack of articles and to produce one or more singulated articles, and one or more synchronization devices configured to deliver the one or more singulated articles to one or more sorter windows.

Provided is an image forming apparatus in which paper is stably transferred from a belt transportation unit on an upstream side to a belt transportation unit on a downstream side. Problems as described above are solved by using the image forming apparatus including a first belt transportation unit, a second belt transportation unit, and a third belt transportation unit that transports a recording medium received from the first belt transportation unit to transfer the recording medium to the second belt transportation unit, in which a diameter of an upstream side pulley of the third belt transportation unit is smaller than a diameter of a downstream side pulley of the first belt transportation unit and a diameter of a downstream side pulley of the third belt transportation unit is smaller than a diameter of an upstream side pulley of the second belt transportation unit.

A sheet-fed press includes at least two units embodied as modules. The at least two modules respectively each comprise at least one individual drive, each individual drive being configured as a position-controlled electric motor. At least one of the at least two modules is configured as a non-impact coating module, and the at least coating module is arranged as at least another of at least two modules that is configured as a primer module or as a painting module.