Patent ID: 6336718
Filing Date: 2002-01-08
Classification: B41J

Abstract:
Apparatus for printing on a label web, comprising: a printer including a printer frame and a print head module removable mounted to the printer frame, the module including an ink jet print head, at least one needle having an end for penetrating a source of ink, tubing connecting the needle and the print head, a movable guard for the end of the needle, the guard being operative to guard the end of the needle whenever the module is removed from the printer frame, the printer frame having a projection, the module further including an interposer for blocking movement of the guard, the interposer being operative in response to engagement with the projection for moving the interposer to unblock movement of the guard to enable the guard to move to expose the end of the needle whenever the module is mounted to the printer frame, and wherein the guard is movable to cause the end of the needle to penetrate the source of ink when the source of ink engages the guard.