Patent ID: 9421786
Filing Date: 2016-08-23
CPC Classification: B41J

Claim Text:
1. A damper device provided in an inkjet printer including a recording head that discharges ink, and a tank that supplies the ink, and the damper device being configured to supply the ink supplied from the tank to the recording head while suppressing pressure fluctuation, and the damper device comprising: a head-side chamber that communicates with the recording head; a tank-side chamber that communicates with the tank; a communicating passage that communicates the head-side chamber and the tank-side chamber; a valve, being configured to open or close the communicating passage; a biasing member that biases the valve in a direction along which the valve closes the communicating passage; a pressure receiving unit that receives air pressure, and changes volume of the head-side chamber according to a change in a position of the pressure receiving unit; a force transmitting unit that is arranged between the valve and the pressure receiving unit, and configured to transmit force received from one of the valve and the pressure receiving unit to the other of the valve and the pressure receiving unit; and a bellows unit that supports the pressure receiving unit so that the position of the pressure receiving unit is changeable, wherein the bellow unit has a folding deformation structure, and the position of the pressure receiving unit is changed by a folding deformation of the folding deformation structure.