Method for determining a printhead gap in an ink jet...

Details Method for determining a printhead gap in an ink jet... Method for determining a printhead gap in an ink jet...

2005-09-21

2008-11-04

Nguyen, Lam S (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S019000, C347S009000

Reexamination Certificate

active

07445302

ABSTRACT:
A method for determining a printhead gap between a printhead and a sheet of media in an ink jet apparatus that performs bi-directional alignment of the printhead includes determining a first amount of bi-directional misalignment of the printhead at a first unknown printhead gap; changing the printhead gap from the first unknown printhead gap to a second unknown printhead gap by a known printhead gap change amount; determining a second amount of bi-directional misalignment of the printhead at the second unknown printhead gap; and calculating at least one of the first unknown printhead gap and the second unknown printhead gap based on the first amount of bi-directional misalignment, the second amount of bi-directional misalignment, and the known printhead gap change amount.

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