Abstract: A three-dimensional printing machine (1) comprises a main chamber (2) which is delimited by a first wall (3) and inside which there are a main platform (5), intended to support a part (4) being printed, and a nozzle (6) designed to supply and deposit a printing material (7) in successive layers, the first wall (3) having at least one transparent main observation window (11), the main chamber (2) containing a secondary chamber (20) which is delimited by a telescopic second wall (21) provided with an insertion orifice (22), through which the nozzle (6) enters the secondary chamber (20), and a transparent secondary observation window (23) allowing an observer (25) stationed outside the main chamber (2) to view the part being printed in the secondary chamber (20).

Abstract: The invention relates to a three-dimensional printing machine (1) comprising a main chamber (2) which is delimited by a first wall (3) and inside which there are a main platform (5), intended to support a part (4) being printed, and a nozzle (6) designed to supply and deposit a printing material (7) in successive layers, the first wall (3) having at least one transparent main observation window (11), the main chamber (2) containing a secondary chamber (20) which is delimited by a telescopic second wall (21) provided with an insertion orifice (22), through which the nozzle (6) enters the secondary chamber (20), and a transparent secondary observation window (23) allowing an observer (25) stationed outside the main chamber (2) to view the part being printed in the secondary chamber (20).

Abstract: A fluid dispensing device (100) for controlling the atmosphere of a work zone (20) has a first connection stage (103), which is provided with an intake chamber (105), intended to receive the incoming fluid (101) and an evacuation chamber (106) intended to collect the outgoing fluid (102) and separated from the intake chamber (105) by a first partitioning structure (110), then a second dispensing stage (104), which comprises, according to an alternation of injection angular segments (A111) and of extraction angular segments (A112) defined by a second partitioning structure (114), a plurality of injection cells (111) which communicate with the intake chamber (105) and which are coupled respectively to several injection points (46) provided in the work zone (20), and plurality of extraction cells (112) which communicate with the evacuation chamber (106) and which are coupled respectively to several extraction points (47) provided in the work zone (20).