Patent ID: 8882254

Claim:
A device for use in printing, the device comprising: a first chamber for receiving a fluid; a first filter member in the first chamber, the first filter member separating the first chamber into a first part and a second part laterally adjacent to the first part, the first filter member comprising pores having an average size, the pores configured to filter the fluid passing from the first part to the second part, the first filter member further comprising an opening adjacent to a top of the first chamber for air to pass from the first part to the second part, the opening having a size at least 10 times larger than the average size of the pores; a first inlet in fluid communication with the first part; a first outlet in fluid communication with the second part; a second chamber for receiving the fluid; a second filter member in the second chamber, the second filter member separating the second chamber into a first part and a second part laterally adjacent to the first part, the second filter member being configured such that substantially all fluid that enters the second part from the first part passes the second filter member; a second inlet in fluid communication with the first part of the second chamber; a second outlet in fluid communication with the second part of the second chamber; and a die comprising pumping chambers, the pumping chambers configured to receive the fluid from the second outlet; wherein the first chamber is downstream of the pumping chambers of the die.