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公开(公告)号:US20240017553A1
公开(公告)日:2024-01-18
申请号:US17867400
申请日:2022-07-18
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor: Russell Sterling SAUER , Jeffrey A. WAGNER
CPC classification number: B41J2/17566 , B41J2/04501 , B41J2002/17569
Abstract: An example printing device includes a plurality of printing agent reservoirs and a printing assembly that is to emit printing agent onto print media. In addition, the printing device includes a pumping assembly fluidly coupled between the plurality of printing agent reservoirs and the printing assembly. The pumping assembly includes a motor and is to transport the printing agent from the plurality of printing agent reservoirs to the printing assembly. Further, the printing device includes a controller coupled to the motor. The controller is to: receive a work parameter of the motor; receive printing agent usage data; and determine that a first printing agent reservoir of the plurality of printing agent reservoirs is empty based on the work parameter and the printing agent usage data.