公开(公告)号：US11745508B2

公开(公告)日：2023-09-05

申请号：US17310126

申请日：2019-06-28

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Carlos Eduardo Caballero Diaz ,  Francesc Tarrida Tirado ,  Javier Deocon Mir

IPC: B41J2/165

CPC classification number: B41J2/16552 ,  B41J2/165 ,  B41J2/16538 ,  B41J2002/16555

Abstract: A printhead servicing system comprises a humidified air stream generator (10) to generate a humidified air stream; a humidified air stream channeling module (20) to channel the generated humidified air stream to a humidified air stream ejection module (30) to eject the humidified air stream towards a printhead nozzle plate (52a) of a printer (50); and a wiping module (40) to wipe a printhead nozzle plate (52a) of the printer.

公开(公告)号：US20240009739A1

公开(公告)日：2024-01-11

申请号：US17786038

申请日：2020-04-27

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Rhys Mansell ,  Mohammad Jowkar ,  Carlos Eduardo Caballero Diaz

IPC: B22F10/77 ,  B29C64/357 ,  B29C64/393 ,  B22F10/322 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y40/00

CPC classification number: B22F10/77 ,  B29C64/357 ,  B29C64/393 ,  B22F10/322 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y40/00

Abstract: A 3D printing apparatus to dehumidify and recycle a gas from a 3D printer is disclosed herein. The apparatus comprises: a gas inlet to receive a gas flow from a 3D printer, the gas flow comprising gas with evaporated solvents to be cleaned; a heat exchanger to dehumidify the gas flow from the evaporated solvents, the heat exchanger to cool the gas flow by heat transfer to a cold liquid stream from a chiller to saturate and condensate the solvents from the gas flow; a gas outlet to output the dehumidified gas flow back to the 3D printer; and a controller. The controller is to receive a humidity and temperature measurements from a sensor located downstream from the heat exchanger; compare the humidity and temperature measurements with a target humidity and a target temperature respectively; and control a chiller valve from the chiller based on the comparison to adjust the temperature of the gas flow to set an absolute humidity of the gas flow to a predeterminable value.