公开(公告)号：US20200180310A1

公开(公告)日：2020-06-11

申请号：US16789890

申请日：2020-02-13

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Guan-Kwee Goh ,  Matthew A. Shepherd ,  Mark Mackenzie

IPC: B41J2/14 ,  B41J2/175

Abstract: According to an example, a printing apparatus may include two drop ejecting elements, a fluid circulating element, and a logic device. The logic device may determine whether one or both of a first drop ejecting element and a second drop ejecting element have been fired within a predetermined period of time prior to a current time. In response to the determination, the logic device may selectively transmit an output signal that is to cause the fluid circulating element to be selectively fired, in which the fluid circulating element is positioned to circulate fluid adjacent to both the first drop ejecting element and the second drop ejecting element.

公开(公告)号：US20190023008A1

公开(公告)日：2019-01-24

申请号：US16067309

申请日：2016-04-29

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Guan-Kwee Goh ,  Matthew A Shepherd ,  Mark Mackenzie

IPC: B41J2/14 ,  B41J2/175

Abstract: According to an example, a printing apparatus may include two drop ejecting elements, a fluid circulating element, and a logic device. The logic device may determine whether one or both of a first drop ejecting element and a second drop ejecting element have been fired within a predetermined period of time prior to a current time. In response to the determination, the logic device may selectively transmit an output signal that is to cause the fluid circulating element to be selectively fired, in which the fluid circulating element is positioned to circulate fluid adjacent to both the first drop ejecting element and the second drop ejecting element.

公开(公告)号：US11110704B2

公开(公告)日：2021-09-07

申请号：US16789890

申请日：2020-02-13

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Guan-Kwee Goh ,  Matthew A Shepherd ,  Mark Mackenzie

IPC: B41J2/14 ,  B41J2/175

Abstract: According to an example, a printing apparatus may include two drop ejecting elements, a fluid circulating element, and a logic device. The logic device may determine whether one or both of a first drop ejecting element and a second drop ejecting element have been fired within a predetermined period of time prior to a current time. In response to the determination, the logic device may selectively transmit an output signal that is to cause the fluid circulating element to be selectively fired, in which the fluid circulating element is positioned to circulate fluid adjacent to both the first drop ejecting element and the second drop ejecting element.

公开(公告)号：US10596814B2

公开(公告)日：2020-03-24

申请号：US16067309

申请日：2016-04-29

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Guan-Kwee Goh ,  Matthew A Shepherd ,  Mark Mackenzie

IPC: B41J2/14 ,  B41J2/165 ,  B41J2/175

Abstract: According to an example, a printing apparatus may include two drop ejecting elements, a fluid circulating element, and a logic device. The logic device may determine whether one or both of a first drop ejecting element and a second drop ejecting element have been fired within a predetermined period of time prior to a current time. In response to the determination, the logic device may selectively transmit an output signal that is to cause the fluid circulating element to be selectively fired, in which the fluid circulating element is positioned to circulate fluid adjacent to both the first drop ejecting element and the second drop ejecting element.