Ink reservoir for inkjet printhead

摘要

An ink reservoir (1) for maintaining ink (10) at a negative pressure by using the suction provided the printhead and then regulating the negative pressure with a pressure regulator (16) that allows air into cartridge at a specified pressure difference. The pressure regulator may be a porous member such as a membrane or mesh filter, or a simple pressure relief valve. The membrane (16), mesh or foam is selected such that its bubble point equates to the specified pressure difference.