Patent ID: 11884074
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 12:
13. The method of producing the liquid discharging head according to claim 12, further comprising:
measuring a change in a pressure in the plurality of individual channels, after the forming of the channel member, by applying pressure to the plurality of individual channels, in a state that a central groove is communicated with atmosphere and the nozzle and the pressure chamber are sealed, the central groove being one of the three or more grooves and being different from an adjacent groove of the three or more grooves adjacent to one of the plurality of hollows in the second direction; and
determining whether the channel member is unsatisfactory, based on the change in the pressure measured in the measuring of the change in the pressure in the plurality of individual channels.