公开(公告)号：WO2020023039A1

公开(公告)日：2020-01-30

申请号：PCT/US2018/043810

申请日：2018-07-26

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

Inventor： SORIANO, David ,  PEDERSON, Douglas ,  BALDO, Nicola ,  RINGWALD, Steve ,  SING, Samrin ,  BAKER, Matthew

IPC: B29C64/343 ,  B29C64/35 ,  B33Y40/00

Abstract: In example implementations, a powder level sensor is provided. The powder level sensor includes a capacitive sensor, a processor, and a cleaning mechanism. The processor is communicatively coupled to the capacitive sensor. The processor interprets a measurement of the capacitive sensor to detect a layer of residual build material on a surface of the powder level sensor. The cleaning mechanism may be communicatively coupled to the processor. The processor activates the cleaning mechanism to remove the layer of residual build material on the surface of the powder level sensor.