Replaceable ink cartridge for ink jet pen

摘要

The invention provides an ink jet pen including a cartridge body having a printhead and a replaceable ink cartridge removably positionable on the cartridge body. At least one cooperating elongate recess and at least one projection are located on the mutually facing surfaces of the ink cartridge and the cartridge body. The projection and recess are engageable with one another for guidably positioning the ink cartridge to a desired position relative to the cartridge body.