Abstract: The present disclosure provides three-dimensional (3D) printing systems, devices, apparatuses, methods, and non-transitory computer readable media for loading new powder into a three-dimensional printer, e.g., during the printing. The manner of loading the new powder may reduce degradation of the powder and/or reduce in the printed 3D object an amount of reaction product(s) of the powder with reactive agent(s) present in the atmosphere.

Abstract: The present disclosure provides a lid assembly, a maneuvering mechanism for the lid assembly, and a casing configured facilitate storing the lid assembly and the maneuvering mechanism, e.g., in a chamber having an isolated environment. The maneuvering mechanism may facilitate maneuvering the lid assembly in the isolated environment. The lid assembly may be configured to maintain in a build module an isolated environment. The present disclosure provides systems, devices, apparatuses, methods, and non-transitory computer readable media, associated with the lid assembly, the maneuvering mechanism, the casing, and with three dimensional printing.