公开(公告)号：US20200247158A1

公开(公告)日：2020-08-06

申请号：US16268777

申请日：2019-02-06

Applicant: Xerox Corporation

Inventor： Marc D. Daniels ,  Husein Naser Rashed ,  Roger G. Leighton ,  Kelly J. Burton

IPC: B41J25/308 ,  B41J2/175

Abstract: An inkjet printer adjusts operation of a vacuum system coupled to a printhead to compensate for pressure changes in the manifold of the printhead caused by vertical displacement of the printhead within the printer. The inkjet printer includes a controller that determines either a difference between an optimal pressure in the manifold and a current pressure to operate a vacuum coupled to the manifold for pressure adjustment or it correlates a current printhead vertical position to a previously observed vertical position and uses a vacuum value associated with the previously observed vertical position to operate the vacuum.

公开(公告)号：US10940691B2

公开(公告)日：2021-03-09

申请号：US16268777

申请日：2019-02-06

Applicant: Xerox Corporation

Inventor： Marc D. Daniels ,  Husein Naser Rashed ,  Roger G. Leighton ,  Kelly J. Burton

IPC: B41J2/175 ,  B25J9/16 ,  B41J3/407 ,  B41J25/308

Abstract: An inkjet printer adjusts operation of a vacuum system coupled to a printhead to compensate for pressure changes in the manifold of the printhead caused by vertical displacement of the printhead within the printer. The inkjet printer includes a controller that determines either a difference between an optimal pressure in the manifold and a current pressure to operate a vacuum coupled to the manifold for pressure adjustment or it correlates a current printhead vertical position to a previously observed vertical position and uses a vacuum value associated with the previously observed vertical position to operate the vacuum.

公开(公告)号：US11052687B2

公开(公告)日：2021-07-06

申请号：US16452960

申请日：2019-06-26

Applicant: Xerox Corporation

Inventor： Marc D. Daniels ,  Husein Naser Rashed ,  Jonathan R. Ireland

IPC: B41J25/00 ,  B41J3/407

Abstract: An object printer is configured to generate a three-dimensional map of a surface of an object to be printed and determine which areas in the three-dimensional map can be printed by a printhead movable in three-dimensional space. Areas can be printed when the printhead is positioned opposite an area where no inkjet in the printhead is closer than a minimum distance for accurate ink drop placement and all of the features in the area are within a maximum distance for accurate ink drop placement from the printhead. The areas that cannot be printed are deleted from the map and the map is displayed so a user can select where an ink image is to be formed on the object. The printer then operates an articulated arm to move the printhead opposite the surface at positions corresponding the selected area and operates the printhead to form the ink image.