INK CARTRIDGE PLUNGER

摘要

An improved plunger (40) for a lithographic printing ink cartridge prevents air entrapment between the plunger (40) and the ink when the plunger (40) is pressed into the ink during cartridge assembly. The plunger bottom portion (42) has a positive radius and a textured surface that facilitates the flow of air away from the center (46) of the plunger toward the cartridge sidewall (44) as the plunger (40) is pressed into the ink.