Abstract: An ink delivery system delivers ink from a stationary ink supply to a print cartridge on a movable carriage. The system comprises an ink container, a reservoir, and a flexible tubing connecting the reservoir to the print cartridge. The ink container has an internal cavity not open to atmosphere holding a supply of ink, and an air inlet channel and an ink exit channel. The ink reservoir has fluid channels to mate with the air inlet channel and ink exit channel on the ink container, and an air opening on the upper portion to connect the internal space of the reservoir to atmosphere and an ink exit port. The ink level in the ink reservoir is controlled by allowing the ink to rise to a level where the ink blocks the air channel into the ink container thereby preventing air to flow there through.

Abstract: Disclosed is a heat exchanger closure connection for establishing a shell side closure between the heat exchanger tubes and the shell and a tube side closure for establishing a connection between the tubes and a tube end extension. The shell includes an outwardly extending shell closure flange having a sealing surface. The tube includes an outwardly extending tube closure flange having axially spaced apart first and second seal surfaces. A first seal ring is positioned between the sealing surfaces of the shell closure flange and the first seal surface of the tube closure flange. A split ring is retained in a groove in the tube closure flange intermediate the first and second seal surfaces thereof. A locking flange is positioned about the tube closure flange in engagement with the split ring to transmit axial forces to the split ring and tube closure flange in the direction of the shell closure flange. Bolts or the like are provided for urging the locking flange toward the shell closure flange.