Ejection Examination Apparatus and Printing Apparatus

Abstract

A small-sized module configured of a detection electrode and a determination unit is provided. An ejection examination apparatus is disclosed, including: a head that ejects a liquid from a nozzle; a detection electrode that faces the nozzle with a predetermined interval between the detection electrode and the nozzle; a power source that sets the detection electrode to a predetermined potential; a determination unit that detects a potential change in the detection electrode arising due to ejection of the liquid from the nozzle and determines a nozzle in the head that does not eject liquid based on the potential change in the detection electrode; and a cap portion that makes contact with the head when printing is not being performed and that houses the detection electrode and the determination unit, the determination unit being sealed by an insulator.

Dependencies are inferred from the claim text.