Abstract: In one example, a device for dispensing build material powder in an additive manufacturing machine includes a first dispenser including a first scoop rotatable in a first direction to scoop build material powder into the first dispenser, a second dispenser including a second scoop rotatable in a second direction opposite the first direction to scoop build material powder into the second dispenser, and a leveler between the first dispenser and the second dispenser.

Abstract: In one example, a liquid delivery and gas removal system for a printhead. The system includes a pump to provide a liquid at a positive pressure. The system also includes a filter fluidically coupled to the pump to receive the pressurized liquid at an upstream side, at a first pressure push the liquid through the filter to a downstream side, and at a higher second pressure push gas bubbles in the liquid through the filter to the downstream side. The system further includes a vent having a gas-permeable membrane. A wet side of the membrane is fluidically coupled to the downstream side and to a printhead. A vacuum is applied to a dry side of the membrane.