Patent ID: 11932013
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 12:
13. A printing device comprising:
a head having a nozzle and configured to eject liquid from the nozzle toward a printing medium;
a carriage configured to move the head in a first direction, the carriage including:
a first distance sensor configured to measure a distance between the head and the printing medium, the first distance sensor being a specular reflection type distance sensor, the first distance sensor including a light-emitting element and a light-receiving element that are aligned in the first direction; and
a second distance sensor configured to measure the distance between the head and the printing medium, the second distance sensor being a diffuse reflection type distance sensor, the second distance sensor including a light-emitting element and a light-receiving element that are aligned in a second direction crossing the first direction;

a conveyor configured to convey the printing medium; and
a controller configured to perform:
starting measuring the distance using the first distance sensor or the second distance sensor at a time when conveyance of the printing medium starts; and
stopping the measuring at a time when the conveyance ends.