摘要:
A sheet handling apparatus comprising a rotary drum (10) having an outer peripheral wall (12) with perforations (14), and a number of separate chambers (20), a suction system for controlling a flow of air through the perforations, thereby to attract sheets to the peripheral wall of the drum, and a stationary shutter member (38; 38') for blocking the flow of air through the perforations when they pass through a predetermined angular range. The number of separate chambers extend in an axial direction and are distributed over the periphery of the drum. A disk-shaped manifold (24;24') at the first axial end of the drum is co-rotatably with the drum. The manifold forms a number of radial channels (26) each connected to one of said chambers and having an opening (50; 50') at a radially inward end of each channel. The stationary shutter member is arranged for blocking an opening of a channel to block air flow from a radially inward end of a channel.
摘要:
A sheet retention device is provided for retaining at least one sheet. The sheet retention device comprises a sheet supporting means (56) for supporting at least a first portion of the sheet, a rotatable guiding means (50) configured to enclose a second portion of the sheet, an urging means (61) and a drive means for in operation controllably rotating the rotatable guiding means. The rotatable guiding means comprises a passageway (55) arranged through the rotatable guiding means, which passageway is configured to enclose the second portion of the sheet, the passageway having an entrance portion (55a) at one side of the rotatable guiding means and an exit portion (55b) at another side of the rotatable guiding means. The rotatable guiding means comprises an outer surface (51) and a sheet deflecting surface (53), such that in operation during at least part of a revolution of the rotatable guiding means a portion of the sheet is guided by the sheet deflecting surface into a sheet retaining position (60). The sheet retaining position is defined by the outer surface of the rotatable guiding means and the urging means. The urging means are urged against a portion of the outer surface of the rotatable guiding means.
摘要:
A sheet conveying system includes an upstream conveyor section having an endless first conveyor belt movable in a first conveying direction x and extending in a first lateral direction z, the first conveying direction x and the first lateral direction z defining a first conveying plane xz; and a downstream conveyor section having an endless second conveyor belt that adjoins the first conveyor belt and is movable in a second conveying direction x′ and extends in a second lateral direction z′, the second conveying direction x′ and the second lateral direction z′ defining a second conveying plane x′z′. The conveyor sections are adapted to hold the sheets slip-free on the first and second conveyor belts. The second conveyor belt has a shear compliance in the second conveying plane x′z′ that is larger than the shear compliance of the first conveyor belt in the first conveying plane xz.
摘要:
The present invention relates to a fluid container, such as an ink bottle, wherein said fluid container comprises a (spring-loaded) valve having an internal screw thread enabling the valve to be securely locked by attaching a capping device having an external screw thread onto the valve.
摘要:
Belt conveyor system comprising: an endless mesh belt, the belt having a mesh structure and having edge areas at the lateral sides, a drive mechanism drivable by a drive motor to rotate the belt, and a steering roller for steering the lateral position of the belt, wherein an edge area comprises a band running substantially parallel to the lateral sides, the band comprising an elastic filler being provided inside the mesh structure, the elastic filler being discernible from the mesh structure, and wherein the belt conveyor system further comprises a band position detector for detecting the lateral position of the band.
摘要:
A sheet conveyor is provided for transporting a sheet. The sheet conveyor includes a supplying conveyor, a receiving conveyor and a sheet guidance unit. The receiving conveyor includes a support surface arranged for supporting the sheet on a contact side of the sheet and an attraction unit arranged for attracting the sheet to the support surface. The supplying conveyor includes a transport belt being arranged for advancing the sheet in a transport direction along a transport path towards the support surface of the receiving conveyor; the sheet having two side edge portions relative to the transport path. The sheet guidance unit is arranged at a downstream end of the transport path for guiding the sheet towards the receiving conveyor, wherein said sheet guidance unit includes a lifting element arranged for lifting both side edge portions of the sheet away from the support surface while a middle portion of the sheet in between both side edge portions is guided towards the support surface.
摘要:
A sheet handling apparatus comprising a rotary drum (10) having an outer peripheral wall (12) with perforations (14), and a number of separate chambers (20), a suction system for controlling a flow of air through the perforations, thereby to attract sheets to the peripheral wall of the drum, and a stationary shutter member (38; 38') for blocking the flow of air through the perforations when they pass through a predetermined angular range. The number of separate chambers extend in an axial direction and are distributed over the periphery of the drum. A disk-shaped manifold (24;24') at the first axial end of the drum is co-rotatably with the drum. The manifold forms a number of radial channels (26) each connected to one of said chambers and having an opening (50; 50') at a radially inward end of each channel. The stationary shutter member is arranged for blocking an opening of a channel to block air flow from a radially inward end of a channel.