Abstract: The present disclosure discloses a moveable feeder assembly/unit for multi-function devices and corresponding retrieval and printing methods. Here, a multi-function device is disclosed. The multi-function device includes multiple trays. Each tray is configured to receive or store one or more media sheets, and further is positioned at a respective vertical height. The multi-function device further includes a single moveable feeder unit for all trays at the multi-function device. The single moveable feeder unit is configured to move across a plurality of positions to reposition itself proximate to a target tray of multiple trays, selected for printing operation.

Abstract: A build plate supported on a movable carriage of a 3D printing machine includes a plurality of clamping surfaces that are engageable by a mechanical clamping system that includes a plurality of clamp assemblies mounted on the movable carriage. Each of the clamp assemblies is associated with a corresponding clamping surface and includes a clamping arm configured to rotate and translate to selectively engage the corresponding clamping surface, a follower arm configured to rotate, and a conversion mechanism configured to convert rotation of the follower arm to rotation and translation of the clamping arm. An actuation mechanism includes an actuation face, corresponding to each follower arm. The actuation mechanism is arranged to simultaneously exert a force against the follower arm of each of the clamp assemblies to rotate the follower arm as the carriage moves from a working station to an unloading station of the 3D printing machine.