Abstract: Example implementations provide a sealing assembly to a seal an aperture, coupling two chambers, the aperture being arranged to accommodate a printhead carriage; the assembly comprising: at least one curtain capable of being disposed in a sealing relationship with the aperture; the at least one curtain being capable of being positioned either side of the printhead carriage, and at least one biasing arrangement to bias the at least one curtain into a biased state; the biased state comprising a component orthogonal to a longitudinal length of the at least one curtain.

Abstract: An additive manufacturing system may include a fluid ejector. The fluid ejector may be movable across a build material distributor at a maximum speed of less than or equal to 40 inches per second. The fluid ejector may include a nozzle having a non-circular bore.

Abstract: Examples Include apparatuses and methods for generating three-dimensional objects. An example apparatus comprises an agent distributor and a wiping element disposed at a service location. The apparatus further comprises at least one airflow component disposed proximate the service location to generate airflow across the wiping element to reduce build material collection on the wiping element.

Abstract: Certain examples described herein relate to printer (110, 210) cooling systems of three-dimensional (3D) printers. In an example of a printer (110, 210) cooling system of a three-dimensional (3D) printer (110, 210), a shared air flow volume (120, 220) is for cooling a plurality of internal printer components (130, 140, 230, 240), and a single air inlet (150, 245) delivers ambient air (160) from outside the three-dimensional (3D) printer (110, 210) to the shared air flow volume (120, 220) In certain cases, the shared air flow volume (120, 220) comprises a first air flow conduit (135, 270) for cooling a first internal printer component (130, 230) and a second air flow conduit (145, 275) for cooling a second internal printer component (140, 240). In certain examples, the first and the second air flow conduits (135, 270) are arranged at least partially in parallel.

Abstract: A printer comprises a print head comprising nozzles to selectively deposit liquid drops to selected portions of a receiving surface, a radiation light source to supply first light to the receiving surface, and a drop detector. The drop detector detects a flying liquid drop ejected by one of the nozzles and comprises a detector light source to emit a light beam of second light and a light detector to detect the light beam of the second light. The second light is distinguishable by the drop detector from the first light.

Abstract: Examples Include apparatuses and methods for generating three-dimensional objects. An example apparatus comprises an agent distributor and a wiping element disposed at a service location. The apparatus further comprises at least one airflow component disposed proximate the service location to generate airflow across the wiping element to reduce build material collection on the wiping element.

Abstract: An additive manufacturing system may include a fluid ejector. The fluid ejector may be movable across a build material distributor at a maximum speed of less than or equal to 40 inches per second. The fluid ejector may include a nozzle having a non-circular bore.

Abstract: Examples relate to a 3D printer capable of positioning a printhead relative to a spittoon disposed within a maintenance region of the 3D printer, ejecting printing fluid from the printhead onto the spittoon, and positioning a moveable heat source proximate to the spittoon to evaporate printing fluid from the spittoon.