Abstract: An apparatus for the layerwise manufacture of 3D objects from particulate build material The apparatus includes a build area within a work surface, wherein the build area represents the surface of the topmost layer. The apparatus also includes a dosing device to provide build material to the work surface; a roller to distribute the build material to form a layer, the axis of rotation of the roller being perpendicular to the direction of distribution; and a cleaning device having a cleaning portion extending parallel to the axis of rotation. The cleaning device includes a plurality of perforations extending from a cleaning surface of the cleaning portion to an opposing surface. The cleaning surface at least intermittently engages against the roller surface and the perforations allow build material to pass from the roller through the cleaning portion to the opposing surface. A method of operation is also provided.

Abstract: An apparatus for manufacturing a three-dimensional object from particulate material.

Abstract: An apparatus for manufacturing a three-dimensional object from particulate material.

Abstract: An apparatus (1) for manufacturing a three-dimensional object from particulate material, the apparatus comprising: • a work space (100) bounded by a first side wall (100A) on a first side of the work space, and a second side wall (100B) on a second side of the work space, the first side wall opposing the second side wall; • a build bed (170) having a build bed surface (160), the build bed surface being comprised in the floor of the work space and having a first edge (160?) on the first side of the work space, towards the first side wall, and a second edge (160?) on the second side of the work space, towards the second side wall; • a first gas inlet (101A) at or near the first side wall; • a second gas inlet (101B) at or near the second side wall; • a first gas outlet (102A) above the floor (100C) of the work space, the position of the first gas outlet being coincident with the first edge of the build bed surface, or between the first edge of the build bed surface and the first gas inlet; and • a second gas ou

Abstract: An apparatus (1) for manufacturing a three-dimensional object from particulate material, the apparatus comprising: a work space (100) bounded by a first side wall (100A) on a first side of the work space, and a second side wall (100B) on a second side of the work space, the first side wall opposing the second side wall; a build bed (170) having a build bed surface (160), the build bed surface being comprised in the floor of the work space and having a first edge (160?) on the first side of the work space, towards the first side wall, and a second edge (160?) on the second side of the work space, towards the second side wall; a first gas inlet (101A) at or near the first side wall; a second gas inlet (101B) at or near the second side wall; a first gas outlet (102A) above the floor (100C) of the work space, the position of the first gas outlet being coincident with the first edge of the build bed surface, or between the first edge of the build bed surface and the first gas inlet; and a second gas outlet (102B)