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公开(公告)号：US10449776B2
公开(公告)日：2019-10-22
申请号：US16125701
申请日：2018-09-08
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Alexander Govyadinov , Adam L. Ghozeil , Boon Bing Ng , Patrick Leonard , Raymond Connolly
Abstract: A print head has a fluid slot and a sensing chamber having a first port connected to the fluid slot and a second port. The sensing chamber contains an ink level sensor. A circulation passage extends from the fluid slot and is fluidly coupled to the second port. A fluid pump circulates fluid through the circulation passage.
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Patent Agency Ranking
公开(公告)号：US10099484B2
公开(公告)日：2018-10-16
申请号：US15520338
申请日：2014-10-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Alexander Govyadinov , Adam L Ghozeil , Boon Bing Ng , Patrick Leonard , Raymond Connolly
Abstract: A print head has an ink slot and a sensing chamber having a first port connected to the fluid slot and a second port. The sensing chamber contains an ink level sensor. A recirculation passage extends from the fluid slot and is fluidly coupled to the second port. A fluid pump circulates fluid through the recirculation passage.
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公开(公告)号：US10532579B2
公开(公告)日：2020-01-14
申请号：US15761621
申请日：2015-11-10
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Boon Bing Ng , Patrick Leonard , Raymond Connolly
Abstract: The present subject matter relates to printhead-integrated ink level sensor (PILS) system. In an example implementation, the PILS system includes a sense capacitor plate in a fluid sensing chamber to sense a level of fluid in the fluid sensing chamber. The fluid sensing chamber is in fluid communication with a fluid reservoir of the printhead to receive fluid from the fluid reservoir. The sense capacitor plate includes at least one slot. The PILS system further includes at least one central clearing resistor and at least one peripheral clearing resistor to clear the fluid sensing chamber of the fluid. The central clearing resistor is provided in the at least one slot of the sense capacitor plate. The at least one peripheral resistor is provided in the fluid sensing chamber surrounding the sense capacitor plate.
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公开(公告)号：US20190001695A1
公开(公告)日：2019-01-03
申请号：US16125701
申请日：2018-09-08
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Alexander Govyadinov , Adam L. Ghozeil , Boon Bing Ng , Patrick Leonard , Raymond Connolly
CPC classification number: B41J2/17566 , B41J2/04541 , B41J2/0458 , B41J2/1404 , B41J2/14072 , B41J2/14153 , B41J2/175 , B41J2/18 , B41J2002/14467 , B41J2202/11 , B41J2202/12
Abstract: A print head has a fluid slot and a sensing chamber having a first port connected to the fluid slot and a second port. The sensing chamber contains an ink level sensor. A circulation passage extends from the fluid slot and is fluidly coupled to the second port. A fluid pump circulates fluid through the circulation passage.
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公开(公告)号：US20180354271A1
公开(公告)日：2018-12-13
申请号：US15761621
申请日：2015-11-10
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Boon Bing Ng , Patrick Leonard , Raymond Connolly
Abstract: The present subject matter relates to printhead-integrated ink level sensor (PILS) system. In an example implementation, the PILS system includes a sense capacitor plate in a fluid sensing chamber to sense a level of fluid in the fluid sensing chamber. The fluid sensing chamber is in fluid communication with a fluid reservoir of the printhead to receive fluid from the fluid reservoir. The sense capacitor plate includes at least one slot. The PILS system further includes at least one central clearing resistor and at least one peripheral clearing resistor to clear the fluid sensing chamber of the fluid. The central clearing resistor is provided in the at least one slot of the sense capacitor plate. The at least one peripheral resistor is provided in the fluid sensing chamber surrounding the sense capacitor plate.
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公开(公告)号：US20170313093A1
公开(公告)日：2017-11-02
申请号：US15520338
申请日：2014-10-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Alexander Govyadinov , Adam L Ghozeil , Boon Bing Ng , Patrick Leonard , Raymond Connolly
CPC classification number: B41J2/17566 , B41J2/04541 , B41J2/0458 , B41J2/1404 , B41J2/14072 , B41J2/14153 , B41J2/175 , B41J2/18 , B41J2002/14467 , B41J2202/11 , B41J2202/12
Abstract: A print head has an ink slot and a sensing chamber having a first port connected to the fluid slot and a second port. The sensing chamber contains an ink level sensor. A recirculation passage extends from the fluid slot and is fluidly coupled to the second port. A fluid pump circulates fluid through the recirculation passage.
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