Patent ID: 11913152
Assignee: RICOH COMPANY, LTD.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D  B | IPC B  D

Claim 9:
10. A maintenance device comprising:
a plurality of caps to contact and move away from a plurality of heads, respectively;
a plurality of individual drain passages communicating with the plurality of caps, respectively;
at least one common drain passage communicating with at least two of the plurality of individual drain passages;
a plurality of suction generators in the plurality of individual drain passages, respectively; and
control circuitry,
wherein each of the plurality of individual drain passages is configured to allow and shut off communication between a cap among the plurality of caps and the at least one common drain passage, and
wherein the control circuitry is configured to:
cause each of the plurality of individual drain passages to allow the communication between the cap and the at least one common drain passage when performing decapping of the head; and
cap a head that is a sucking target among the plurality of heads with the cap after shutting off each individual drain passage communicating with the cap corresponding to a head that is not the sucking target among the plurality of heads; and
control a corresponding suction generator among the plurality of suction generators to perform suction of the head that is the sucking target.