Invention Grant
- Patent Title: Negative pressure recovery of printing agents
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Application No.: US17278681Application Date: 2018-12-04
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Publication No.: US11427012B2Publication Date: 2022-08-30
- Inventor: Devin Michael Knowles , Paul Allan Osborne , Christopher John Arnold
- Applicant: Hewlett-Packard Development Company, L.P.
- Applicant Address: US TX Spring
- Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee Address: US TX Spring
- Agency: Dicke Billig & Czaja PLLC
- International Application: PCT/US2018/063918 WO 20181204
- International Announcement: WO2020/117220 WO 20200611
- Main IPC: B41J2/18
- IPC: B41J2/18 ; B41J2/175

Abstract:
An example printing apparatus includes a reservoir to contain a printing agent. The printing apparatus further includes a recovery port to receive connection of a recovery vessel and to communicate flow of the printing agent from the reservoir to the recovery vessel during a recovery operation. The printing apparatus further includes a recovery pump to pump the printing agent from the reservoir through the recovery port to the recovery vessel during the recovery operation. The printing apparatus further includes a vacuum pump at the reservoir to reduce pressure in the reservoir to below atmospheric pressure during the recovery operation to draw unrecovered printing agent away from the recovery port when the recovery vessel is removed from the recovery port.
Information query
IPC分类: