Liquid supply device, liquid discharge device, and image recording apparatus

A liquid supply device comprising:

• a liquid supply passage which communicates with a recording head;
• a first liquid pressure applying part provided in the liquid supply passage that applies a pressure to liquid;
• a first pressure buffering unit provided en route in the liquid supply passage and being configured to include a first liquid chamber having a supply port and a discharge port through which the liquid flowing through the liquid supply passage flows in and out, a first gas chamber provided to oppose the first liquid chamber, and a first flexible membrane interposed between the first liquid chamber and the first gas chamber;
• a liquid recovery passage which communicates with the recording head;
• a second liquid pressure applying part provided in the liquid recovery passage that applies a pressure to the liquid;
• and
• a second pressure buffering unit provided en route in the liquid recovery passage and being configured to include a second liquid chamber having a supply port and a discharge port through which the liquid flowing through the liquid recovery passage flows in and out, a second gas chamber provided to oppose the second liquid chamber, and a second flexible membrane interposed between the second liquid chamber and the second gas chamber,
• wherein the first flexible membrane and the second flexible membrane are provided with initial bending in advance.