Patent ID: 6796646
Filing Date: 2004-09-28
Classification: B41J

Abstract:
An ink jet pen comprising a cartridge body having a printhead and a replaceable ink cartridge, said ink cartridge and cartridge body containing at least one elongate recess having an axis parallel to the length of the recess and at least one elongate projection, said recess and projection being located on mutually racing surfaces of the cartridge and cartridge body, wherein the at least one projection and the at least one recess are engageable with one another for guidably positioning the ink cartridge to a desired position relative to the cartridge body along an guiding axis which is at least initially parallel with the recess axis, and wherein said elongate recess has a variable width, the recess width varying from a first portion of said elongate recess to a second portion of said elongate recess, said elongate projection has a variable width, the projection varying from a first end of said elongate projection to a second end of said elongate projection, and a latch member connected to the ink cartridge for engaging a portion of the cartridge body for maintaining the ink cartridge in the desired position relative to the cartridge body.